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研究网络环境下反馈控制系统的最优性能问题.综合考虑系统的跟踪误差和控制对象输入,通过H2范式给出性能指标函数式.针对网络反馈系统中参考信号为单位阶跃信号,从传感器通过通信信道将数据传给控制器的过程中受到脉冲干扰的问题,采用二自由度控制器来控制系统.给出了系统性能指标的下确界,其与控制对象频域下的增益以及系统的非最小相位零点密切相关;同时,输入信号的方向向量也对性能指标起决定性作用.通过仿真证明了系统的性能指标与控制对象本质特征之间的关系.
This paper studies the optimal performance of feedback control system in network environment.Considering the tracking error of the system and the input of control object, the function formula of function is given by the H2 paradigm.Aiming at the unit step signal of the reference signal in the network feedback system, Communication channel to the data transmitted to the controller by the pulse interference problem, the use of two-degree-of-freedom controller to control the system.Given the system performance indicators of the lower bound, and the control object in the frequency domain gain and system The non-minimum phase zero point is closely related; at the same time, the directional vector of the input signal also plays a decisive role on the performance index.The simulation shows the relationship between the system performance index and the nature of the control object.