一类不匹配未知干扰基于两步干扰观测器的估计

Estimation for a Class of Mismatched Unknown Disturbance Based on Two-step Disturbance Observer

针对一类非线性系统中存在的不匹配频率未知干扰,提出了一种两步干扰观测器的估计策略.设计两步干扰观测器对干扰进行估计,使得干扰估计误差系统为渐近稳定的.并通过数值仿真实例,验证了所提方法的正确性和有效性.

An estimation strategy of two-step disturbance observer was proposed for mismatched unknown frequency disturbance existing in a class of nonlinear systems. Two-step disturbance observer was designed to estimate the disturbance,and the disturbance estimation error system was asymptotically stable. A number simulation example was given to demonstrate the correctness and effectiveness of the proposed method.