转向器综合试验台加载系统多余力抑制研究

阐述了汽车转向器综合试验台系统多余力产生的原因。构建了试验台的物理模型,依据试验台负载加载系统的液压控制原理,建立了以伺服放大器、电液伺服阀、伺服缸、力传感器等的系统数学模型;采用结果不变性原理设置前馈补偿器的方法消除负载加载系统中所产生的多余力,將补偿前后的数学模型在Matlab中进行时域和频域的仿真和对比分析,加入前馈补偿后系统满足性能指标;实际采样力曲线实验结果对比说明多余力有效地得到抑制。

Restraining Superfluous Force of Loading System of Vehicle Steering Mechatronic Test Bench

We explain the causes of the superfluous force of a vehicle steering mechatronic test bench.The superfluous force is one of the main factors that affects the precision of a control system.The physical model of the test bench was constructed by using the hydraulic control principle.Its mathematical model was established by using servo amplifier,electro-hydraulic servo valve,valve cylinder and force sensor.The superfluous force of its loading system was restrained by setting a feed-forward compensator according to the structure-invariant theory.We simulate and contrast the test bench with the feed-forward compensator through using MATLAB;the simulation results and their contrast show that the test bench meets its performance indexes.The experimental results on actual force show that the superfluous force of the loading system is effectively restrained.