| Patent application number | Description | Published |
|---|
| 20080221818 | Correction of Factors in Vehicle Accelerometer Signals - A method for measuring and storing values of sensor bias in acceleration values for a vehicle, obtained over a plurality of time periods from a sensor having a specified range of expected variability of sensor bias values, includes measuring a first value of sensor bias obtained during operation of the vehicle in a first time period, storing the measured first value of sensor bias for use in one or more subsequent time periods, measuring a second value of sensor bias obtained during operation of the vehicle in a second time period, subtracting the measured second value of sensor bias from the stored first value of sensor bias, thereby generating a sensor bias difference, and storing the measured second value of sensor bias, for reference in one or more subsequent time periods, if the sensor bias difference is within the specified range of expected variability of sensor bias values. | 09-11-2008 |
| 20080319622 | Operation of Electronic Stability Control Systems Using Data from a Plurality of Sources - A method for operating a vehicle electronic stability control (“ESC”) system utilizing values for a variable obtained from a primary source and a redundant source includes the steps of receiving a first value for the variable from the primary source, receiving a second value for the variable from the redundant source, generating a normalized value as a function of the first value and the second value, determining whether the primary source is operating correctly, utilizing the first value for operation of the vehicle ESC system if the primary source is operating correctly, and utilizing the second value for operation of the vehicle ESC system if the primary source is not operating correctly and the second value is not greater in absolute value than the normalized value. | 12-25-2008 |
| 20090105900 | Reconfigurable Structure Method of Estimating Vehicle Lateral Velocity - A system, method and computer program product is provided for estimating the lateral velocity of a vehicle. The method comprises providing a plurality of estimation structures, each estimation structure corresponding to one of a plurality of dynamic regions in which a vehicle may operate, determining in which of the plurality of dynamic regions the vehicle is operating to identify a first dynamic region, and generating a first regional lateral velocity estimation from a first estimation structure corresponding to the first dynamic region. | 04-23-2009 |
| 20100222977 | MULTI-FACTOR SPEED ESTIMATION SYSTEM AND METHOD FOR USE - A method of estimating a speed of a vehicle is provided. The vehicle has a wheel and the method comprises receiving a first wheel speed signal indicating a rotation rate of the wheel, determining a first calculated forward speed of the vehicle based on the first wheel speed signal, receiving a first steering signal, determining the first steering signal contains information indicating large steering activity, receiving a second wheel speed signal at a later time than the first wheel speed signal, and determining, in response to receiving the first steering signal, a second calculated forward speed of the vehicle that is based on the second wheel speed signal and the first calculated forward speed. | 09-02-2010 |
| 20100305810 | METHODS OF OPERATING A CONTROL SYSTEM OF A VEHICLE AND VEHICLE SYSTEMS - Methods for operating a control system of a vehicle and vehicle systems are provided. A method includes receiving a first output signal from a longitudinal accelerometer during a first travel condition of the vehicle including a first vehicle speed of the vehicle and a first road grade substantially equal to zero, wherein the first vehicle speed is a constant speed and the first output signal represents a first measurement including a first vehicle acceleration component and a bias offset component, receiving a second output signal during a second travel condition of the vehicle including a second vehicle speed of the vehicle and a second road grade, wherein the second output signal represents a second measurement including a second vehicle acceleration component and the bias offset component, and determining the bias offset component and gravity component to obtain an estimated road grade factor. | 12-02-2010 |
| 20110112739 | GPS-Enhanced Vehicle Velocity Estimation - A method is provided for estimating vehicle velocity for a vehicle using a single-antenna global positioning system (GPS). An absolute speed and a course angle of the vehicle is measured using the single-antenna GPS. The yaw rates of the vehicle are measured independently of the GPS. An integrated yaw rate of the vehicle is calculated as a function of the measured yaw rates over a period of time. A yaw angle is determined as a function of a reference yaw angle and the integrated yaw rate. Aside slip angle is calculated as a function of the estimated yaw angle and the course angle provided by the GPS. The vehicle velocity is determined as a function of the absolute speed and the side slip angle. The vehicle velocity is provided to a vehicle dynamic control application. | 05-12-2011 |
| 20110257827 | Systems and Methods for Controlling a Vehicle Along a Road With a Road Bank - Systems and methods for detecting road bank and determining road bank angle include determining a road bank angle as a function of difference in slip angle where the difference in slip angle is a function of difference in course angle and difference in yaw angle. | 10-20-2011 |
| 20110276242 | METHOD AND SYSTEM FOR ASSESSING VEHICLE MOVEMENT - Methods and systems are provided for assessing movement of a vehicle having a plurality of wheels. A plurality of wheel direction values are obtained. Each of the wheel direction values pertains to a direction of wheel rotation of a respective wheel. An average value of the wheel direction values is calculated. A direction of movement of the vehicle is obtained via a controller using the average value. In addition, a signed velocity is determined for and indicative of both forward and reverse motions using the wheel direction values. | 11-10-2011 |
