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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。
Aiming at the problem of delay (ie, delay) in aero-engine control system, a sliding mode optimal predictive control based on time-delay compensator is proposed. The special linear transformation is defined to systematize the control of time-lag links with state quantity and control quantity in the original engine as time-delay-free systems. In the new coordinate system, the time delay compensator is used to establish the optimal quadratic index with the minimum correction error , Find the optimal sliding mode predictive control quantity and carry on the system simulation. The results show that this method can well compensate for the impact of time lag in the control system of aeroengine and control the system in advance. The system responds fast and the overall effect reaches the expected goal.