Method and apparatus for dynamically determically determining an operating state of a motor vehicle
AssigneeFord Global Technologies, LLC
InventorsBehrouz Ashrafi, Darrel Alan Recker
Life of this patent
Estimating the term…
Abstract
A system for dynamically determining an operating state of a motor vehicle for input to a controller employed to control dynamics of the motor vehicle includes sensors for measuring predetermined vehicle operating state. The system also includes a device for predicting a value for the predetermined operating state, which can then be used to determine a correction factor for the measured operating state signal. This correction factor is proportional to the erroneous component of the measured vehicle operating state. Together, measured operating state and the correction signal are used to obtain a compensated operating state signal. This is particularly useful for reducing the effects of sensor drift and DC offset.
Claims12
A system for dynamically determining an operating state of a motor vehicle for input to a controller employed to control dynamics of the motor vehicle, said system comprising:
- operating state measuring means comprising means for producing a first signal corresponding to an operating state of said automotive vehicle;
- operating state predictor means comprising means for producing a second signal representing a prediction of said operating state;
- correction means comprising means for producing a third signal representing an erroneous component of said first signal;
- and
- compensator means for removing said third signal from said first signal to obtain a fourth signal which accurately represents said operating state and providing said fourth signal to said controller, wherein said correction means updates said third signal when said vehicle is operating in a predetermined state and does not update said third signal when said vehicle is not operating in said predetermined state.
A system for dynamically determining a yaw rate of a motor vehicle for input to a controller employed to control dynamics of the motor vehicle, said system comprising:
- right wheel speed measuring means for producing a right wheel speed signal corresponding a right wheel road speed;
- left wheel speed measuring means for producing a left wheel speed signal corresponding a left wheel road speed;
- yaw rate measuring means comprising means for producing a first signal corresponding to a measured yaw rate of said motor vehicle;
- yaw rate predictor means comprising means for producing a second signal using said right and left wheel speed signals, said second signal thereby representing a predicted yaw rate of said motor vehicle;
- correction means comprising means for producing a third signal representing an erroneous component of said first signal;
- and
- compensator means for removing said third signal from said first signal to obtain a fourth signal which accurately represents said yaw rate and providing said fourth signal to said controller.
A method for dynamically determining a yaw rate of a motor vehicle for input to a controller employed to control dynamics of the motor vehicle, said method comprising the steps of:
- measuring a right wheel speed and producing a right wheel speed signal;
- measuring a left wheel speed and producing a left wheel speed signal;
- measuring a measured yaw rate and producing a first signal corresponding thereto;
- predicting a predicted yaw rate and producing a second signal corresponding thereto;
- producing a third signal representing an erroneous component of said first signal;
- and
- dynamically compensating said first signal by subtracting said third signal therefrom, thereby producing a fourth signal which accurately represents said yaw rate for use by said controller.
Dependencies are inferred from the claim text.