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提出一种低通滤波降阶时滞观测器 ,避免了常规时滞观测器控制中由于时滞状态微分近似引起的控制信号颤振。参考模型的选取只与系统的相对阶次有关 ,而与系统阶次无关 ,从而简化了控制器的设计 ,降低了对系统可测性的要求。仿真结果表明 ,该时滞观测器控制系统可以很好地抑制系统的不确定性以及受到的外部干扰 ,是一种性能优良的鲁棒控制方法。
A low-pass filter order-reduced delay observer is proposed to avoid the chattering of control signals due to the differential approximation of delay state in the conventional delay observer control. The selection of the reference model is only related to the relative order of the system and has nothing to do with the order of the system, thus simplifying the design of the controller and reducing the requirement of system testability. The simulation results show that the proposed time-delay observer control system can restrain the system uncertainties and external disturbances well. It is a robust control method with excellent performance.