Vehicle stability enhancement system
First Claim
1. A side-slip velocity estimation module for a vehicle stability enhancement control system, comprising:
- a side-slip acceleration estimation module that estimates a side-slip acceleration of a vehicle;
a multiple-order integrator that integrates said side-slip acceleration to generate an estimated side-slip velocity of said vehicle; and
a reset logic module that clears an output of said multiple-order integrator when a first condition occurs.
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Accused Products
Abstract
A side-slip velocity estimation module for a vehicle stability enhancement control system includes a side-slip acceleration estimation module that estimates a side-slip acceleration of a vehicle. A multiple-order integrator integrates the side-slip acceleration to generate an estimated side-slip velocity of the vehicle. A reset logic module clears an output of the multiple-order integrator when the vehicle experiences a straight-driving condition, when a speed of the vehicle is less than a predetermined speed, and/or when a sensor bias condition occurs. The multiple-order integrator includes at least two accumulators and at least two feedback loops. The estimated side-slip velocity is a weighted sum of outputs of at least one of the at least two accumulators. A sum of the at least two feedback loops offsets the estimated side-slip acceleration.
37 Citations
26 Claims
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1. A side-slip velocity estimation module for a vehicle stability enhancement control system, comprising:
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a side-slip acceleration estimation module that estimates a side-slip acceleration of a vehicle; a multiple-order integrator that integrates said side-slip acceleration to generate an estimated side-slip velocity of said vehicle; and a reset logic module that clears an output of said multiple-order integrator when a first condition occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle stability enhancement control system, comprising:
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a side-slip velocity estimation module that includes; a side-slip acceleration estimation module that estimates a side-slip acceleration of a vehicle; and a multiple-order integrator that integrates said side-slip acceleration to generate an estimated side-slip velocity of said vehicle; a command interpreter that generates an optimal side-slip velocity and an optimal yaw rate of said vehicle; a side-slip velocity control module that compares said optimal side-slip velocity and said estimated side-slip velocity to generate a side-slip control signal; a yaw rate control module that compares said optimal yaw rate and a measured yaw rate of said vehicle to generate a yaw control signal; and a summing module that sums said yaw control signal and said side-slip control signal to generate an actuator control signal, wherein a rear-wheel steering actuator turns a set of rear wheels of said vehicle to create a yaw moment that corrects a dynamic behavior of said vehicle based on said actuator control signal.
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14. A method for estimating a side-slip velocity of a vehicle in a vehicle stability enhancement control system, comprising:
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estimating a side-slip acceleration of a vehicle; integrating said side-slip acceleration to generate an estimated side-slip velocity of said vehicle, wherein a multiple-order integrator intergrates said side-slip acceleration; and clearing an output of said multiple-order integrator when a first condition occurs. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for operating a vehicle stability enhancement control system, comprising:
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estimating a side-slip acceleration of a vehicle; integrating said side-slip acceleration to generate an estimated side-slip velocity of said vehicle, wherein a multiple-order integrator integrates said side-slip acceleration; generating an optimal side-slip velocity and an optimal yaw rate of said vehicle; comparing said optimal side-slip velocity and said estimated side-slip velocity to generate a side-slip control signal; comparing said optimal yaw rate and a measured yaw rate of said vehicle to generate a yaw control signal; summing said yaw control signal and said side-slip control signal to generate an actuator control signal; and turning a set of rear wheels of said vehicle to create a yaw moment that corrects a dynamic behavior of said vehicle based on said actuator control signal.
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Specification