In order to suppress the uncertain disturbance of valve-controlled asymmetric cylinder with high frequency noise,a line-ar active disturbance rejection control method for valve-controlled asymmetric cylinder electro-hydraulic servo system based on two-layer cascade extended state observer was proposed.It was realized by the low-pass filter characteristics and the positive correlation be-tween the estimated speed & accuracy and the bandwidth value of the linear extended state observer.On the basis of analyzing the sta-bility of the two-layer cascade linear extended state observer,the comparison simulation with the traditional linear active disturbance re-jection control method was carried out.The simulation results show that the proposed control method inherits the advantages of tradition-al active disturbance rejection control,the estimation speed and accuracy for uncertain disturbance are improved,the adverse effect of uncertain disturbance with high frequency measurement noise is effectively inhibited,and high performance control of valve-controlled asymmetrical cylinder electro-hydraulic servo system can be realized.
关键词
阀控非对称缸/电液伺服系统/线性自抗扰控制/级联扩张状态观测器/高频测量噪声
Key words
valve-controlled asymmetrical cylinder/electro-hydraulic servo system/linear active disturbance rejection control/cascade extended state observer/high-frequency measurement noise
维普
万方数据