基于模型跟踪变结构算法的电子节气门控制

Electronic Throttle Control Based on Model-following Variable Structure Algorithm

针对电子节气门控制中使用最多的PID算法在参数发生漂变、存在扰动时会导致控制精度下降甚至不稳定的情况,提出了模型跟踪变结构算法,并说明了模型参考自适应算法与模型跟踪变结构算法的区别。对能够适应参数漂变的基于Lyapunov模型参考自适应控制算法进行仿真,指出了算法具有迟滞性的缺点。对模型跟踪变结构算法进行仿真,与模型参考自适应算法的仿真结果进行对比,得出了模型跟踪变结构算法跟踪迟滞小以及在系统建模不准确、参数存在漂变、存在有界扰动时依然可精确控制电子节气门的结论。

Aiming at the situation that PID algorithm used in electronic throttle controlling mostly become less accuracy and unstable when its parameters are drifting changed or existing disturbance,an algorithm of model tracking variable structure was proposed,and the differences between model reference adaptive algorithm and the algorithm of model tracking variable structure were demonstrated.The model reference adaptive algorithm based on the Lyapunov that can adapt to the drifting change of parameter was simulated,and the shortcomings of retardation of the algorithm were pointed out.The algorithm of model tracking variable structure was simulated and its result was compared with the one of model reference adaptive algorithm.It is concluded that the algorithm of model tracking variable structure has less retardation and can still control the electronic throttle accurately while system modelling inaccurate,existing drifting change of parameters and bounded disturbance.