工程车辆转向系统动态特性研究

发布时间：2018-05-03 12:48

本文选题：线控 + 液压转向系统　；参考：《机械设计与制造》2016年02期

【摘要】：新型线控液压转向系统与原转向系统相比,具有很多突出的优点,其在工程车辆上的应用目前处于初级阶段,且其控制方式常采用传统的PID控制,但是转向系统具有低阻尼、非线性等性质,所以传统的PID控制不能达到良好的控制效果,从而常出现转向滞后不稳等问题。因此,设计了适合该系统的模糊自适应PID控制算法,目的是解决转向滞后和转向不稳等问题,其进一步提高该系统的动态特性。该设计通过Simulink与AMESim联合仿真,对比相同输入信号下的两种控制对该系统动态特性影响。结果表明:本设计算法的响应速度比原来算法的响应速度大约提高了0.5s,且基本无超调,动态特性较好。
[Abstract]:Compared with the original steering system, the new type of wire-controlled hydraulic steering system has many outstanding advantages. Its application in engineering vehicles is at the primary stage, and its control mode is usually controlled by traditional PID control, but the steering system has low damping. Because of the nonlinear properties, the traditional PID control can not achieve a good control effect, which often leads to the instability of the steering lag. Therefore, a fuzzy adaptive PID control algorithm suitable for the system is designed to solve the problems of steering lag and instability, which can further improve the dynamic characteristics of the system. The design is simulated by Simulink and AMESim, and the influence of two kinds of control under the same input signal on the dynamic characteristics of the system is compared. The results show that the response speed of the proposed algorithm is about 0.5s faster than that of the original algorithm, and there is basically no overshoot, and the dynamic characteristics are better.
【作者单位】：内蒙古科技大学机械工程学院;内蒙古师范大学法政学院;
【分类号】：TH137;TP273.4;TP271.31

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