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飞机地面空调车温度控制系统是一个非线性、时变、模型不精确、工作环境不确定的复杂系统,传统的PID控制方法难以满足该系统的控制要求。因此,设计了一种多模型模糊PID控制器。该控制器考虑空调输入电压对温度控制的影响,将输入电压分为2个区间分别建模,每个区间设计不同的模糊PID控制器,多个模糊PID控制器构成多模型模糊PID控制器。当输入电压发生变化时,选择相应区间的控制器进行调温。仿真结果表明,多模型模糊PID控制器优于单模型模糊PID控制器,有效地改善系统的瞬时响应、稳态精度和鲁棒性,具有良好的工业利用前景。
The temperature control system of aircraft ground-based vehicle is a complex system with nonlinear, time-varying, inaccurate model and uncertain working environment. The traditional PID control method can not meet the control requirements of the system. Therefore, a multi-model fuzzy PID controller is designed. The controller considers the influence of input voltage of air conditioner on temperature control. The input voltage is divided into two sections and modeled respectively. Different fuzzy PID controllers are designed in each section. Multiple fuzzy PID controllers form multi-model fuzzy PID controller. When the input voltage changes, select the appropriate range of the controller for temperature control. The simulation results show that the multi-model fuzzy PID controller is superior to the single model fuzzy PID controller, which can effectively improve the instantaneous response, steady-state accuracy and robustness of the system, and has good industrial application prospect.