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中文摘要：
本文中为汽车电动助力转向（EPS）系统设计了一种无转矩传感器控制策略。首先采用拉格朗日动力学方程建立了EPS系统的简化数学模型,并分析了其可控性和可观测性;接着提出了一种无转矩传感器EPS系统的PID闭环助力控制策略;最后设计了转矩观测的卡尔曼滤波器和基于TMS320F28335浮点DSP的EPS台架试验系统,并分别进行了仿真与台架试验。结果表明,采用无转矩传感器控制策略,可降低EPS系统的复杂性和成本,并提高了系统性能。
英文摘要：
A control strategy without torque sensor for vehicle electric power steering（EPS） system is devised in this paper.Firstly a simplified mathematic model for EPS system is created by using Lagrangian dynamics equation with its controllability and observability analyzed.Then a PID closed-loop assistance control strategy for EPS system without torque sensor is proposed.Finally a Kalman filter for torque observation and an EPS bench test system based on TMS320F28335 floating-point DSP are designed,and both simulation and bench test are conducted.The results show that using the control strategy proposed can reduce the cost and complexity and improve the performance of EPS system.
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