基于时滞补偿器的航空发动机最优滑模预测控制

Sliding Mode Optimum Predictive Control for Aero- engine Based on Time-delay Compensator

针对航空发动机控制系统中存在的时滞(即延迟)问题,提出了基于时滞补偿器的滑模最优预测控制。定义特殊线性变换,将原发动机中含状态量和控制量时滞环节的控制系统化为无时滞系统;在新的坐标系下采用时滞补偿器以最小修正误差建立最优二次型指标,求出最优的滑模预测控制量并进行亍系统仿真。结果表明:该方法能够很好地补偿航空发动机控制系统中时滞环节带来的影响,对系统进行提前控制,系统响应速度较快,整体效果达到预想目标。

In allusion to time - delay problem in aero-engine control system, sliding mode optimum predictive control for aero - engine based on time-delay compensator had been proposed. Through a particular linear transformation, the original control system with time- delay portion in aero- engine＇s state variable and control variable was transformed into a delay -free system; then based on the trans- formed system, a method of optimal sliding mode with a quadratic performance index minimized by time-delay compensator was proposed by applying optimal control technique. Simulation results indicate the proposed method could forecast and control sliding mode process in future and enhance the system＇s robustness. So error closed loop control had been realized by above method.