Patent application number | Description | Published |
20120259429 | POWERED JOINT ORTHOSIS - A powered device augments a joint function of a human during a gait cycle using a powered actuator that supplies an augmentation torque, an impedance, or both to a joint, and a controller that modulates the augmentation torque, the impedance, and a joint equilibrium according to a phase of the gait cycle to provide at least a biomimetic response. Accordingly, the device is capable of normalizing or augmenting human biomechanical function, responsive to a wearer's activity, regardless of speed and terrain. | 10-11-2012 |
20120259430 | CONTROLLING POWERED HUMAN AUGMENTATION DEVICES - In a communication system for controlling a powered human augmentation device, a parameter of the powered device is adjusted within a gait cycle by wirelessly transmitting a control signal thereto, whereby the adjusted parameter falls within a target range corresponding to that parameter. The target range is selected and the device parameters are controlled such that the powered device can normalize or augment human biomechanical function, responsive to a wearer's activity, regardless of speed and terrain and, in effect, provides at least a biomimetic response to the wearer of the powered device. | 10-11-2012 |
20120259431 | TERRAIN ADAPTIVE POWERED JOINT ORTHOSIS - A powered device augments a joint function of a human during a gait cycle using a powered actuator that supplies an augmentation torque, an impedance, or both to a joint. A controller estimates terrain slope and modulates the augmentation torque and the impedance according to a phase of the gait cycle and the estimated terrain slope to provide at least a biomimetic response. The controller may also modulate a joint equilibrium. Accordingly, the device is capable of normalizing or augmenting human biomechanical function, responsive to a wearer's activity, regardless of speed and terrain, and can be used, for example, as a knee orthosis, prosthesis, or exoskeleton. | 10-11-2012 |
20120283845 | BIOMIMETIC JOINT ACTUATORS - In a powered actuator for supplying torque, joint equilibrium, and/or impedance to a joint, a motor is directly coupled to a low-reduction ratio transmission, e.g., a transmission having a gear ratio less than about 80 to 1. The motor has a low dissipation constant, e.g., less than about 50 W/(Nm) | 11-08-2012 |
20140081420 | IMPLEMENTING A STAND-UP SEQUENCE USING A LOWER-EXTREMITY PROSTHESIS OR ORTHOSIS - Knee orthoses or prostheses can be used to automatically when it is appropriate to initiate a stand-up sequence based on the position of the person's knee with respect to the person's ankle while the person is in a seated position. When the knee is moved to position that is forward of the ankle, at least one actuator of the orthosis or prosthesis is actuated to help raise the person from the seated position to a standing position. | 03-20-2014 |
20140081421 | HYBRID TERRAIN-ADAPTIVE LOWER-EXTREMITY SYSTEMS - Hybrid terrain-adaptive lower-extremity apparatus and methods that perform in a variety of different situations by detecting the terrain that is being traversed, and adapting to the detected terrain. In some embodiments, the ability to control the apparatus for each of these situations builds upon five basic capabilities: (1) determining the activity being performed; (2) dynamically controlling the characteristics of the apparatus based on the activity that is being performed; (3) dynamically driving the apparatus based on the activity that is being performed; (4) determining terrain texture irregularities (e.g., how sticky is the terrain, how slippery is the terrain, is the terrain coarse or smooth, does the terrain have any obstructions, such as rocks) and (5) a mechanical design of the apparatus that can respond to the dynamic control and dynamic drive. | 03-20-2014 |
20140081424 | HYBRID TERRAIN-ADAPTIVE LOWER-EXTREMITY SYSTEMS - Hybrid terrain-adaptive lower-extremity apparatus and methods that perform in a variety of different situations by detecting the terrain that is being traversed, and adapting to the detected terrain. In some embodiments, the ability to control the apparatus for each of these situations builds upon five basic capabilities: (1) determining the activity being performed; (2) dynamically controlling the characteristics of the apparatus based on the activity that is being performed; (3) dynamically driving the apparatus based on the activity that is being performed; (4) determining terrain texture irregularities (e.g., how sticky is the terrain, how slippery is the terrain, is the terrain coarse or smooth, does the terrain have any obstructions, such as rocks) and (5) a mechanical design of the apparatus that can respond to the dynamic control and dynamic drive. | 03-20-2014 |
20140088727 | CONTROLLING POWERED HUMAN AUGMENTATION DEVICES - In a communication system for controlling a powered human augmentation device, a parameter of the powered device is adjusted within a gait cycle by wirelessly transmitting a control signal thereto, whereby the adjusted parameter falls within a target range corresponding to that parameter. The target range is selected and the device parameters are controlled such that the powered device can normalize or augment human biomechanical function, responsive to a wearer's activity, regardless of speed and terrain and, in effect, provides at least a biomimetic response to the wearer of the powered device. | 03-27-2014 |
20140114437 | CONTROLLING POWER IN A PROSTHESIS OR ORTHOSIS BASED ON PREDICTED WALKING SPEED OR SURROGATE FOR SAME - In some embodiments of a prosthetic or orthotic ankle/foot, a prediction is made of what the walking speed will be during an upcoming step. When the predicted walking speed is slow, the characteristics of the apparatus are then modified so that less net-work that is performed during that step (as compared to when the predicted walking speed is fast). This may be implemented using one sensor from which the walking speed can be predicted, and a second sensor from which ankle torque can be determined. A controller receives inputs from those sensors, and controls a motor's torque so that the torque for slow walking speeds is lower than the torque for fast walking speeds. This reduces the work performed by the actuator over a gait cycle and the peak actuator power delivered during the gait cycle. In some embodiments, a series elastic element is connected in series with a motor that can drive the ankle, and at least one sensor is provided with an output from which a deflection of the series elastic element can be determined. A controller determines a desired torque based on the output, and controls the motor's torque based on the determined desired torque. | 04-24-2014 |
20140121782 | CONTROLLING TORQUE IN A PROSTHESIS OR ORTHOSIS BASED ON A DEFLECTION OF SERIES ELASTIC ELEMENT - In some embodiments of a prosthetic or orthotic ankle/foot, a prediction is made of what the walking speed will be during an upcoming step. When the predicted walking speed is slow, the characteristics of the apparatus are then modified so that less net-work that is performed during that step (as compared to when the predicted walking speed is fast). This may be implemented using one sensor from which the walking speed can be predicted, and a second sensor from which ankle torque can be determined. A controller receives inputs from those sensors, and controls a motor's torque so that the torque for slow walking speeds is lower than the torque for fast walking speeds. This reduces the work performed by the actuator over a gait cycle and the peak actuator power delivered during the gait cycle. In some embodiments, a series elastic element is connected in series with a motor that can drive the ankle, and at least one sensor is provided with an output from which a deflection of the series elastic element can be determined. A controller determines a desired torque based on the output, and controls the motor's torque based on the determined desired torque. | 05-01-2014 |
20140296997 | BIOMIMETIC TRANSFEMORAL PROSTHESIS - In an artificial limb system having an actuator coupled to a joint for applying a torque characteristic thereto, a control bandwidth of a motor controller for a motor included in the actuator can be increased by augmenting a current feedback loop in the motor controller with a feed forward of estimated back electromotive force (emf) voltage associated with, the motor. Alternatively, the current loop is eliminated and replaced with a voltage loop related to joint torque. The voltage loop may also be augmented with the feed forward of estimated back emf, to improve the robustness of the motor controller. | 10-02-2014 |
20150127118 | PROSTHETIC, ORTHOTIC OR EXOSKELETON DEVICE - A time-dependent decay behavior is incorporated into one or more joint actuator control parameters during operation of a lower-extremity, prosthetic, orthotic or exoskeleton device. These parameters may include joint equilibrium joint impedance (e.g., stiffness, damping) and/or joint torque components (e.g., gain, exponent). The decay behavior may be exponential, linear, piecewise, or may conform to any other suitable function. Embodiments presented herein are used in a control system that emulates biological muscle-tendon reflex response providing for a natural walking experience. Further, joint impedance may depend on an angular rate of the joint. Such a relationship between angular rate and joint impedance may assist a wearer in carrying out certain activities, such as standing up and ascending a ladder. | 05-07-2015 |