Patent application number | Description | Published |
20110273447 | Connection-relation deciding program, computer aiding apparatus, computer aiding method - A computer aiding apparatus includes a storage unit that stores therein pieces of component information on component basis; an calculating unit that searches from the storage unit for a piece of component information assigned to a bonding component that bonds components together and calculates an including shape includes the three-dimensional shape of the bonding component that is included in the piece of the component information found; a search unit that searches, in accordance with the arrangement position of the including shape calculated, for any piece of component information assigned to any component that interferes with the including shape from the storage unit; and a deciding unit that decides, depending on a function of the bonding component, an inter-component unmovable direction in which the component related to the piece of the component information that is found. | 11-10-2011 |
20120059629 | THREE-DIMENSIONAL SIMULATION METHOD AND APPARATUS - A three-dimensional simulation apparatus includes a memory configured to store form information of a sheet flexible object model formed of first polygons and another object model, an interference determination unit configured to determine whether the sheet flexible object model formed of the first polygons in three-dimensional simulation space interferes with the other object model on the basis of the form information stored in the storage unit, a polygon creation unit configured to form second polygons by dividing the sheet flexible object model in a longitudinal direction when it is determined that the sheet flexible object model interferes with the other object model, and a shape computation unit configured to determine a shape of the sheet flexible object model using the formed second polygons in consideration of a shape of the other object model. | 03-08-2012 |
20120173207 | HARNESS DESIGN SUPPORT METHOD AND HARNESS DESIGN SUPPORT APPARATUS - An apparatus and method for supporting harness design. Harness information including a pass position of a harness is set on a three-dimensional model. Then, it is determined whether the harness whose position is decided so as to pass through the set pass position interferes with a mechanical part that is read from a storing unit that stores therein three-dimensional model data on the mechanical part through which the harness passes. When it is determined that the harness interferes with the mechanical part, from among a plurality of surfaces of the mechanical part, a surface that has not been selected is selected, and a pass position of the harness is set outside the selected surface. Then, a position of the harness that passes through the set pass position is decided. These processes are repeated until it is determined that the harness does not interfere with the mechanical part. | 07-05-2012 |
20120239355 | COMPUTER-READABLE RECORDING MEDIUM IN WHICH THERMAL HYDRAULIC SIMULATION PROGRAM IS STORED, THERMAL HYDRAULIC SIMULATING DEVICE, AND METHOD FOR THERMAL HYDRAULIC SIMULATION - In the event of modifying analysis condition, after the simulation of a first time step carried out when the analysis condition is modified finishes and before the simulation of a second time step next after the first step starts, the modified analysis condition is referred and the simulation based on the modified analysis condition is carried out in the next time step. | 09-20-2012 |
20120253757 | COMPUTER-READABLE RECODING MEDIUM IN WHICH THERMAL HYDRAULIC SIMULATION PROGRAM IS STORED, THERMAL HYDRAULIC SIMULATING DEVICE, AND METHOD FOR THERMAL HYDRAULIC SIMULATION - A prior simulation of a velocity field and a temperature field is carried out, and snapshot data of the velocity field and that of the temperature field are collected during the prior simulation. Then principal component analysis on the collected snapshot data obtains velocity-field and temperature field dimension transformation matrixes, on the based on which the analysis models of the velocity field and temperature field having respective first degrees of freedom are converted into reduced degree-of-freedom models. Consequently, a simulation of the velocity field and the temperature field is carried out using models having respective reduced degrees of freedom (i.e., second degrees of freedom). | 10-04-2012 |
Patent application number | Description | Published |
20100020800 | Communication Device - A device including: a receiving unit receiving a packet; a packet determining unit determining whether the received packet is a head fragment packet or an intermediate or last fragment packet; a search control unit using search data registered previously for searching for packet information and search data used for identifying the same fragment of the fragment packet on the same search address; and an assembly processing unit assembling the fragment packets, wherein the search control unit extracts a fragment identifier from the head fragment packet and registers the fragment identifier as the search data on the same search address as the search address of the search data registered previously for searching for the packet information and extracts the fragment identifier of the intermediate fragment packet or the last fragment packet, makes a search in a way that uses the fragment identifier as search target data, and assembles the fragment packets. | 01-28-2010 |
20100046534 | DATA TRANSMISSION APPARATUS - A data transmission apparatus includes an input interface; an output interface; and a first and second switch portions which are provided between the input interface and the output interface and which transfer a frame from the input interface to a destination output interface, wherein the first and the second switch portions each include a buffer which stores the frame from the input interface according to the destination output interface, a scheduler which reads the frame from the buffer and transfers the frame to the destination output interface, and a frame amount detection portion which detects the amount of frames held in the buffer according to the destination output interface, and the scheduler controls reading from the buffer based on difference between the held frame amount of the first switch portion and the held frame amount of the second switch portion which is detected by the frame amount detection portion. | 02-25-2010 |
20110096790 | SIGNAL PROCESSING CIRCUIT, INTERFACE UNIT, FRAME TRANSMISSION APPARATUS, AND SEGMENT DATA READING METHOD - A signal processing circuit for controlling reading of segment data from a buffer in which a plurality of segment data generated by dividing a frame and received via a plurality of switches which direct each of the segment data to a designated destination are stored, comprises: a start detecting unit which detects a starting segment representing the first transmitted segment data to the switch among the segment data received after the buffer has emptied; a transmission time acquiring unit which acquires a transmission time at which the starting segment was transmitted to the switch; and a read timing control unit which determines, based on the transmission time, a read timing for reading the segment data from the buffer. | 04-28-2011 |
Patent application number | Description | Published |
20100067313 | MEMORY DEVICE - A memory device that can include a power-supply voltage detector that detects power-supply voltage values and that outputs a detection result indicating which power-supply voltage value is detected; a data-rate setter that sets data rates corresponding to the detection result of the power-supply voltage detector, in synchronization with a rising edge or falling edge of a clock signal; and a memory cell array that performs reading/writing at the data rates set by the data-rate setter. | 03-18-2010 |
20120084526 | NONVOLATILE MEMORY UNIT - An apparatus includes a nonvolatile memory, an interface that at least receives an erase command of the nonvolatile memory, a first controller that controls the nonvolatile memory to execute data erasing on the basis of the erase command output from the interface, an external input unit which is installed independently of the interface, a second controller that controls the nonvolatile memory to execute data erasing on the basis of an erase instruction signal output from the external input unit, and a change-over circuit that switches between connection of the first controller with the nonvolatile memory and connection of the second controller with the nonvolatile memory, wherein the second controller controls the nonvolatile memory to execute data erasing on the basis of the erase instruction when the connection of the second controller with the nonvolatile memory is established by the change-over circuit. | 04-05-2012 |
20130077426 | SEMICONDUCTOR STORAGE APPARATUS AND SEMICONDUCTOR INTEGRATED CIRCUIT - In a semiconductor storage apparatus, an internal address generation unit generates, when receiving successive first and second external addresses, from the second external address an internal address for selecting any of the memory cells connected to bit lines and word lines except the bit line and word line connected to a memory cell to be selected according to the first external address. When receiving the successive external addresses, a memory cell connected to the same bit line and word line is not continuously selected, and erroneous readout due to rewriting of a value of the memory cell in a non-selected state is suppressed. | 03-28-2013 |
Patent application number | Description | Published |
20100266059 | RADIO COMMUNICATION APPARATUS CAPABLE OF SWITCHING MODULATION SCHEMES - A radio communication apparatus that is capable of switching modulation schemes. The radio communication apparatus includes a QPSK modulation signal generator, a QAM modulation signal generator, a transmission radio, and a common transmission power amplifier. The QPSK modulation signal generator modulates transmission data by a QPSK modulation scheme and outputs a QPSK modulation signal. The QAM modulation signal generator modulates transmission data by a QAM scheme and outputs a QAM modulation signal. The transmission radio receives the QPSK modulation signal or the QAM modulation signal and outputs a transmission signal, which is amplified by the common transmission power amplifier. The QPSK modulation signal generator and the QAM modulation signal generator each output signal component that make an average transmission power of the QAM modulation signal in the common transmission power amplifier smaller than an average transmission power of the QPSK modulation signal in the common transmission power amplifier. | 10-21-2010 |
20110200086 | RADIO COMMUNICATION APPARATUS CAPABLE OF SWITCHING MODULATION SCHEMES - A transmitting apparatus includes a modulation signal generating section that generates a modulation signal by modulating transmission data using one of a plurality of modulation schemes. The plurality of modulation schemes include a first modulation scheme, a second modulation scheme, and a third modulation scheme, where the first modulation scheme has maximum m-ary modulation value, the second modulation scheme has a lower m-ary modulation value than the first modulation scheme, and the third modulation scheme has a lower m-ary modulation value than the second modulation scheme. The transmitting apparatus also includes a pilot signal generating section that generates a pilot signal having one of a plurality of amplitudes, the pilot signal having a lower amplitude than a maximum amplitude of the first modulation scheme. The transmitting apparatus further includes a selection section that selects the modulation signal or the pilot signal according to a frame timing signal and generates a transmission quadrature baseband signal, a radio section that converts the transmission quadrature baseband signal to a radio signal, an amplifying section that amplifies the radio signal, and an antenna section that transmits the amplified radio signal. | 08-18-2011 |
20120236962 | RADIO COMMUNICATION APPARATUS CAPABLE OF SWITCHING MODULATION SCHEMES - A transmitting apparatus, includes a signal generator that generates a modulation signal by modulating transmission data using one of a plurality of modulation schemes, a first modulation scheme having a higher m-ary modulation value than other modulation schemes and a pilot signal generator generates a pilot signal. An orthogonal frequency division multiplexing (OFDM) signal generator generates an OFDM signal by selecting the modulation signal and the pilot signal according to the frame timing signal. The OFDM signal is converted to a radio signal, is amplified and is transmitted to an antenna. The pilot signal is inserted in the OFDM signal per a predetermined OFDM symbol and per a predetermined subcarrier and has a lower amplitude than a maximum amplitude of the first modulation scheme in an in-phase-quadrature (IQ) plane. | 09-20-2012 |
Patent application number | Description | Published |
20090290249 | MANAGEMENT APPARATUS, STORAGE SYSTEM, AND STORAGE APPARATUS MANAGEMENT METHOD - There is provided a management apparatus of a storage apparatus. The management apparatus includes an acquisition determination section that determines whether predetermined identification information can be acquired or not from a mounting apparatus that mounts at least one storage apparatus and has at least one predetermined identification information assigned thereto, and a failure determination section that determines, based on a determination result of the acquisition determination section, an access failure to the storage apparatus mounted in the mounting apparatus has been caused due to a failure of the storage apparatus itself or an interruption of a power supply to the mounting apparatus. | 11-26-2009 |
20090292867 | Storage-apparatus, disk controller, and command issue control method - The storage apparatus of the present invention includes a disk controller (CM) that issues a command to a disk via a fabric device. The CM controls the number of commands to be issued to the disk based on the structure of the storage apparatus and the operation state of the storage apparatus. | 11-26-2009 |
20100153668 | STORAGE SYSTEM, STORAGE MANAGING DEVICE AND STORAGE MANAGING METHOD - A storage system, a storage managing device, and a storage managing method are provided. The storage system includes plural mount devices in which storage devices are mounted and includes a router connected to at least two loops in which plural mount devices are cascade-connected to one another, an initialization completion determining unit that determines whether an initialization processing of obtaining identification information of the storage devices is completed when the initialization processing concerned is executed by using at least one loop of the loops connected to the router, an initialization time determining unit that determines whether an execution time of the initialization processing elapses a predetermined time based on a determination result of the initialization completion determining unit, and a time extending unit that extends the predetermined time when the determination result indicates that the initialization processing completed and the initialization processing is executed by the plural loops. | 06-17-2010 |
20100235571 | STORAGE APPARATUS, RELAY DEVICE, AND METHOD FOR CONTROLLING COMMAND ISSUE - A storage apparatus includes a disk controller that issues commands to disks connected in loops, and a relay device that relays the commands issued from the disk controller to the disks. The relay device includes a supervisory control unit that monitors the number of commands to be issued to each of the loops including the disks and controls the number of commands to be issued by the disk controller on the basis of the monitored results. | 09-16-2010 |
20110246687 | STORAGE CONTROL APPARATUS, STORAGE SYSTEM AND METHOD - A storage control apparatus for transmitting data to and receiving data from a plurality of storage devices connected to the same interface, the storage control apparatus includes a memory configured to store a management table registering a burst transfer length of each of the plurality of storage devices, the plurality of storage devices including a first storage device having a first burst transfer length that is a minimum in the management table and a second device having a second burst transfer length; an adjusting controller configured to adjust the second burst transfer length in input and/or output processing if the second burst transfer length registered in the management table is different from the first burst transfer length; and a data transfer controller configured to issue a command for a data transfer to the second storage device on the basis of the adjusted second burst transfer length. | 10-06-2011 |
20130046945 | STORAGE APPARATUS AND STORAGE APPARATUS CONTROL METHOD - A selector calculates a difference between the number of write operations of a first storage medium and that of a second storage medium and takes the difference as a first difference. Further, the selector calculates a difference between the number of write operations of the first storage medium and that of a third storage medium after copying the data within the second storage medium to the third storage medium and takes the difference as a second difference. Then, the selector selects the second storage medium as a target of replacement with which the second difference is larger than the first difference. A setting changer copies the data stored in the second storage medium selected as a target of replacement to the third storage medium, and changes the setting of the second storage medium to a spare and the setting of the third storage medium to a data write destination. | 02-21-2013 |
20140006727 | CONTROL APPARATUS AND STORAGE APPARATUS | 01-02-2014 |
20140006744 | STORAGE CONTROL DEVICE, COMPUTER-READABLE RECORDING MEDIUM, AND METHOD THEREOF | 01-02-2014 |
20140198406 | STORAGE DEVICE, SWEEP OPERATION CONTROL METHOD AND SWEEP OPERATION CONTROL PROGRAM - A storage device which includes a plurality of magnetic disk drives has a storage unit that stores, for each of the plurality of magnetic disk drives, information of whether or not the magnetic disk drive is incorporated in a redundant structure, a specifying unit that specifies, among the plurality of magnetic disk drives, a plurality of magnetic disk drives which have a redundant structure on the basis of the information stored in the storage unit, and a control unit that controls, for the plurality of magnetic disk drives specified by the specifying unit, an execution timing of sweep operation in which a head smoothes a lubricant material such that the sweep operation is executed for a single magnetic disk drive at a time. | 07-17-2014 |
20140289493 | CONTROL DEVICE, STORAGE DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM HAVING STORED THEREIN CONTROL PROGRAM - A control device including a processor. The processor configured to allocate a data area of a memory device to a plurality of memory areas of data blocks of a first size; allocate identical data blocks of the first size to a plurality of the data areas of the memory device; manage management information indicating a data storing state of the plurality of memory areas of data blocks of the first size in each data area; determine, based on the management information regarding a plurality of data areas allocated with respect to a data block to be written, one data area from the plurality of data areas; and generate write data of a second size, which is different from the first size, including data of the data block to be written and write the write data in the one data area. | 09-25-2014 |
Patent application number | Description | Published |
20100061599 | Function activating apparatus and function activating method - A function activating apparatus includes a correspondence storage unit, an operation detecting unit, a feature-amount calculating unit, an encoded-information generating unit, a function retrieving unit, and a function activating unit. The correspondence storage unit stores a correspondence between encoded information and a function to be activated in response to input of biometric information formed of time-series image data. The operation detecting unit detects, from the time-series image data, at least one of the moving direction and acceleration of the input operation of the biometric information. The feature-amount calculating unit calculates the feature amount of at least one of the moving direction and acceleration. The encoded-information generating unit assigns a predetermined code to the feature amount. The function retrieving unit retrieves from the correspondence storage unit a function associated with the encoded information. The function activating unit activates the function. | 03-11-2010 |
20110162068 | Authentication apparatus - An authentication apparatus performs local and global corrections on image data. Local correction uses the shape of a local line indicated by line information contained in a neighboring region on image data whose feature value extracted from the shape of a line is used for authentication. Global correction uses the shape of a global line indicated by line information contained in a region larger than the neighboring region. The authentication apparatus calculates the difference between line information contained in image data corrected by local correction and line information contained in image data corrected by global correction and compares the difference with a threshold. If the difference is less than the threshold, the authentication apparatus outputs, as line information contained in image data, line information corrected by local correction and, if the difference is greater, it outputs, as line information contained in image data, line information corrected by global correction. | 06-30-2011 |
20120014570 | BIOMETRIC AUTHENTICATION DEVICE AND BIOMETRIC AUTHENTICATION METHOD - A biometric authentication device includes: a biometric information acquiring unit which acquires a user's biometric information and generates a biometric image representing the biometric information; a storage unit which stores data concerning registered biometric information of at least one registered user; and a processing unit. The processing unit detects from the biometric image a moderately blurred region having a first degree of blurring and a highly blurred region having a second degree of blurring which is higher than the first degree of blurring, identifies the cause of the occurrence of the highly blurred region and the moderately blurred region, and presents to the user a warning message corresponding to the cause of the occurrence of the blurred regions. | 01-19-2012 |
20120090015 | DEVICE AND METHOD FOR AUTHENTICATING BIOLOGICAL INFORMATION - An biological-information authentication device includes, a biological-information reading section configured to read biological information; a comparing section configured to compare biological information read by the biological-information reading section with registered biological information to determine whether they match; a registration section configured to register biological information; a biological-information-input-operation extraction section configured to extract input operation data indicating an input operation of biological information read by the biological-information reading section. The device further includes an approval-input-operation determination section configured to determine whether the input operation data of the biological information extracted by the input-operation extraction section matches approval input operation data indicating an input operation for approval that is stored in advance when the comparing section determines that the biological information is unregistered biological information and that biological information input next to the unregistered biological information matches the registered biological information of an administrator having approval authority. | 04-12-2012 |
20120189171 | BIOMETRIC INFORMATION PROCESSING APPARATUS, BIOMETRIC INFORMATION PROCESSING METHOD, AND BIOMETRIC INFORMATION PROCESSING COMPUTER PROGRAM - A biometric information processing apparatus includes: a biometric information acquiring unit which acquires a user's biometric information and generates a biometric input image representing the biometric information; and a processing unit. The processing unit implements: generating a first intermediate image by applying first image processing to the biometric input image; generating a second intermediate image by applying second image processing to the biometric input image; detecting, from each of the first and second intermediate images, a singular point candidate; calculating a distance between the singular point candidates detected from each of the first and second intermediate images for the same singular point contained in the biometric information; calculating a quality metric for the biometric input image based on the distance; and if the quality metric is not higher than a predefined threshold value, then prompting the user to have the user's biometric information reacquired by the biometric information acquiring unit. | 07-26-2012 |
20120281890 | BIOMETRIC AUTHENTICATION DEVICE, BIOMETRIC INFORMATION PROCESSING DEVICE, BIOMETRIC AUTHENTICATION SYSTEM, BIOMETRIC AUTHENTICATION SERVER, BIOMETRIC AUTHENTICATION CLIENT, AND BIOMETRIC AUTHENTICATION DEVICE CONTROLLING METHOD - A fingerprint image obtaining unit | 11-08-2012 |
20120319817 | BIOMETRIC INFORMATION PROCESSING APPARATUS AND BIOMETRIC INFORMATION PROCESSING METHOD - A biometric information processing apparatus includes: a calculation unit that calculates the direction of each of characteristic lines included in biometric information extracted from a user; a smoothing unit that smoothes each of the characteristic lines; a difference calculation unit that calculates a difference between the direction of each of the characteristic lines and the direction of each of the smoothed characteristic lines; a detection unit that detects, as a change candidate area, a potentially changeable area in the biometric information based on each of the calculated differences; and an estimation unit that estimates the future authentication accuracy using the biometric information, based on the detected change candidate area. | 12-20-2012 |
20130028488 | BIOMETRIC INFORMATION PROCESSING DEVICE, BIOMETRIC-INFORMATION PROCESSING METHOD, AND COMPUTER-READABLE STORAGE MEDIUM - An biometric-information processing device includes a biometric-information acquiring unit that generates a biometric image representing biometric information on a surface of a specific portion of a user; a divider that divides the biometric image into multiple blocks; a prior-complexity-degree estimator that estimates, for each of the multiple blocks, a prior complexity degree indicating complexity of a pattern of part included in the biometric information and represented in the block, on a basis of a difference between a direction of the pattern of the part included in the biometric information and represented in the block and a direction of a pattern of other part included in the biometric information and represented in the block adjacent to that block; a posterity-complexity-degree determiner that determines, for each of the multiple blocks, a posterior complexity degree indicating complexity of an image of the part included in the biometric information and represented in the block. | 01-31-2013 |
20130279770 | BIOMETRIC INFORMATION REGISTRATION DEVICE AND BIOMETRIC INFORMATION REGISTRATION METHOD - The quality of biometric information that will be input the next time is estimated. Estimated matching quality information is calculated which indicates the degree of matching between estimated quality information and quality information of the actually input biometric information. Further, past quality information is calculated which indicates how the quality of a plurality of pieces of estimated matching quality information varied in the past. Then, whether or not the biometric information is to be registered is determined according to the estimated matching quality information and the past quality information. | 10-24-2013 |
20140133711 | BIOMETRIC INFORMATION CORRECTION APPARATUS, BIOMETRIC INFORMATION CORRECTION METHOD AND COMPUTER-READABLE RECORDING MEDIUM FOR BIOMETRIC INFORMATION CORRECTION - A biometric information correction method includes applying a correction process with respect to a first biometric image representing biometric information of a user to enhance a degree of clarity of the biometric information of the user, thereby creating a second biometric image, extracting a first feature amount representing features of the biometric information from the first biometric image and a second feature amount representing features of the biometric information from the second biometric image, calculating a degree of change representing a difference between the first feature amount and the second feature amount, and outputting the first feature amount when the degree of change indicates that an artifact has been created in the second biometric image. | 05-15-2014 |
20140294261 | BIOMETRIC INFORMATION PROCESSING APPARATUS AND BIOMETRIC INFORMATION PROCESSING METHOD - A biometric information processing apparatus includes: a biometric information acquiring unit which generates a biometric image representing biometric information of a plurality of fingers of a user; and a processor adapted to extract a biometric region capturing biometric information of each of the plurality of fingers in the biometric image; obtain the first distance between the biometric regions corresponding to two adjacent fingers of the plurality of fingers; and estimate an angle of spread between the two adjacent fingers according to a ratio of a value obtained by subtracting a distance between bases of the two fingers from the first distance, to a length from a base of one of the two adjacent fingers to the biometric information. | 10-02-2014 |
20150030216 | IMAGE PROCESSING APPARATUS AND METHOD - A processor configured to execute a process includes receiving image information including biometric information, extracting, from the image information, a first phase component image representing a phase component included in the image information, converting the image information into first frequency information and converts the first phase component image into second frequency information, extracting a first feature vector and a second feature vector respectively on the basis of amplitude information of the first frequency information and the second frequency information determined in advance, and combining the first feature vector and the second feature vector on the basis of a prescribed rule. | 01-29-2015 |
Patent application number | Description | Published |
20080291565 | CONTROL APPARATUS, STORAGE APPARATUS, AND WRITING CONTROL METHOD - A control apparatus detects positional information of a head performing writing processing every predetermined time interval, and computes next-sample projected positional information of the head based on the difference between the positional information detected the previous time and the positional information detected the current time, and the current detected positional information for every position information detected. The control apparatus determines whether the computed next-sample projected positional information is greater than a next-sample projected position threshold which is a predetermined threshold. Following this, in the case that determination is made that the next-sample projected positional information is greater than the projected position threshold, the disk control apparatus controls a storage device to stop the writing processing after the writing processing is performed through the end of the sector wherein the writing processing is currently being performed. | 11-27-2008 |
20090059415 | STORAGE DEVICE AND SERVO INFORMATION WRITING METHOD - A storage device receives and holds a storage medium that is subjected to first servo writing processing for writing servo information, a Gray code of which is offset, from an inner cylinder or an outer cylinder to a predetermined cylinder and, after the first servo writing processing, subjected to second servo writing processing for writing servo information from an opposite direction to the predetermined cylinder and in which Gray codes are written to be offset not to overlap in the first or second servo writing processing and the pieces of servo information having different mark patterns are written in the first servo writing processing and the second servo writing processing. The storage device acquires cylinder information and mark patterns from the servo information written in the held storage medium and controls a position of a head based on the acquired cylinder information and mark patterns. | 03-05-2009 |
20090080104 | INFORMATION STORAGE APPARATUS FOR DETERMINING STABILITY - According to an aspect of an embodiment, a storage apparatus has a head for writing data into or reading data from a medium, an actuator for moving the head and a controller for applying a driving current to the actuator so as to move the head to a target position over the medium, for superimposing a disturbance current onto the driving current, the controller including a feedback loop which adjusts the driving current so as to move the head toward the target position on the basis of the position data read out from the medium by the head, the controller being configured to determine a frequency characteristic of gain and phase of the feedback loop on the basis of the driving current and the disturbance current. | 03-26-2009 |