Exact linearization control for a nonlinear servo system

Author

Yang, Xin

Author_Institution

Coll. of Comput. Sci. & Technol., Harbin Univ. of Sci. & Technol., Harbin

fYear

2008

fDate

2-4 July 2008

Firstpage

5139

Lastpage

5142

Abstract

The state-space equation of a hydraulic servo system was derived and the exact linearization method of nonlinear system was applied to transform the nonlinear system into a linear controllable one by coordinates transformation and state-space feedback. Then, the zero dynamics of the system was analyzed and the result shows that the zero dynamics of the linearized system was stable and the servo system can be exact linearized. Based on the linearization model, the control law was achieved through linear control theory. Then, the system zero dynamics was analyzed so as to verify the validity of the controller. Finally, the simulation results show that the system with designed controller is not only free from the overshoot, but also has good rapidity.

Keywords

control system analysis; control system synthesis; hydraulic control equipment; linearisation techniques; nonlinear control systems; state feedback; state-space methods; exact linearization control; hydraulic servo system; nonlinear servo system; state-space equation; state-space feedback; system zero dynamics; Control systems; Control theory; Linear feedback control systems; Nonlinear control systems; Nonlinear dynamical systems; Nonlinear equations; Nonlinear systems; Servomechanisms; State feedback; Transforms; Coordinates transformation; Exact linearization; Nonlinear system;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference, 2008. CCDC 2008. Chinese

Conference_Location

Yantai, Shandong

Print_ISBN

978-1-4244-1733-9

Electronic_ISBN

978-1-4244-1734-6

Type

conf

DOI

10.1109/CCDC.2008.4598309

Filename

4598309