测量噪声对GMVC性能影响分析与改进方法

Analysis and Improvement of the Effect of Measurement Noise on the Performance of GMVC Based Controller

由于工作环境的改变及各类干扰信号的影响,易使控制器性能降低,影响控制效果,因此需设计出一种可以在复杂情况下能够稳定工作的控制器。针对上述问题,提出了一种基于广义最小方差控制(GMVC)的控制器设计方法。GMVC控制器设计过程一般不考虑测量噪声,然而在实际过程中,系统不可能工作于理想情况下,会受到测量噪声的影响。因此首先分析了测量噪声对GMVC控制系统输出的影响,提出了采用数字滤波器的方式减小测量噪声对控制系统输出的影响,仿真结果说明了该方法的可行性和有效性。

The change of environment and different types of disturbance signals may lead to the degenerationof the performance of the controller. Therefore, it is necessary to design a controller that can work well in allkinds of complex situations. In view of the above, the design procedure of the generalized minimum variancecontrol （GMVC） based controller is proposed. The design of GMVC based controller generally does notconsider the measurement noise. However, in the actual process, the system cannot work in the idealsituation. It generally subjects to the measurement noise. Firstly, the influence of measurement noise on theoutput of the GMVC control system is analyzed. The digital filter is proposed to be used so as to reduce theeffect of measurement noise and improve the performance of GMVC based controller. The practicability andeffectiveness of the proposed method can be demonstrated by the simulation results.