Designing disturbance observer for non-linear systems - a Hirschorn inverse approach

作者：Dasgupta Sudeshna^*; Sadhu Smita; Ghoshal Tapan Kumar

来源：IET Science Measurement & Technology, 2017, 11(2): 164-170.

DOI：10.1049/iet-smt.2016.0105

Disturbance observers (DOBs) are increasingly being suggested as a necessary component in active anti-disturbance control. Although the structure and design pragmatics of DOBs for linear systems are well known, very few publications deal with DOB for non-linear systems. A new method for designing DOBs for non-linear systems has been proposed. Instead of the usual observer gain based approach, the proposed approach employs Lie derivative and Hirschorn inverse. The algorithm for the proposed DOB, its applicability, structure, along with its block diagram have been presented and discussed. Performance of the proposed DOB has been evaluated using highly non-linear chemical processes. Additionally, the performance is compared with that for a well-known DOB to demonstrate the superiority of the proposed DOB.

• 出版日期2017-2