火车制动防滑控制的滑模变结构控制方法研究

采用传统的滑模变结构控制方法设计的火车制动防滑控制系统动态性能较差且由于系统的非线性会造成系统产生高频率抖振的控制信号.为此采用改进指数趋近律法对传统的滑模变结构控制方法进行改进.首先构建车轮制动时相应的数学模型,然后对传统的防滑系统滑模变结构控制器进行设计,接着对传统的防滑系统滑模变结构控制器进行改进.分别应用Simulink对传统的车轮制动防滑系统和改进的车轮制动防滑系统进行仿真与分析研究.通过对比仿真结果发现应用改进的滑模变结构控制方法设计的高速列车制动防滑系统有更好的动态性能,并且消除了抖振现象,加快了系统响应速度.

Research on Train Braking Anti-Skid Control of Sliding Mode Variable Structure Control Algorithm

The dynamic performance of the train braking anti-skid control system based on traditional sliding mode variable structure control method is poor,and as a result of the system nonlinear,it will cause the system to produce high frequency chattering of control signals.The improved exponential reaching law method is used to improve the traditional sliding mode variable structure control method.Firstly,the corresponding mathematical model is built,then the traditional sliding mode variable structure controller is designed and improved.The traditional wheel anti-skid braking system and the improved wheel braking system is simulated and analyzed respectively by using Simulink.By comparing the simulation results,it is found that high-speed train braking anti-skid system designed by improved sliding mode variable structure control method has better dynamic performance,and the chattering phenomenon is eliminated,the response speed of the system is accelerated.