Comparative study on two types of nonlinear controller which based on extended state observer

This paper makes a detailed analysis on two controller which can be applied to conditions of model uncertainty and interference exist. The two controller is Linear auto-disturbances-rejection controller (LADRC) and Tornambe controller (TC). Analyzed their distinctiveness and oneness based on principle description and did simulation experiment on their robustness. Experimental results show that the LADRC and TC both have good robust performance. When meet certain conditions, LADRC and TC have equivalent significance.