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Vehicle electric power assist steering system and method using velocity based torque estimation
Vehicle electric power assist steering system and method using velocity based torque estimation
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机译:使用基于速度的扭矩估计的车辆电动助力转向系统和方法
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摘要
A steering system (10) and method (70) for controlling the steering of a vehicle having a steering wheel (12), a steering column (14)connected to the steering wheel (12), and an electric motor (20) operatively engaged with the steering column (14) for supplying torque assist. A velocity detector is employed for detecting an angular velocity θ̇m of the electric motor (20). The system has a torque estimator (40) for determining an estimated torque signal Tdest as a function of the detected motor velocity θ̇m, and a motor controller (30) for generating a motor control signal (U) as a function of said estimated torque. Accordingly, the present invention reduces the complexity and cost of the electric power assist steering system by eliminating the need for a conventional pinion torque sensor, without sacrificing vehicle steering performance.
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