Title :
LQR control for secondary-regulation hydrostatic transmission system via exact linearization
Author :
Yang, Xin ; Liu, Haichang
Author_Institution :
Harbin Univ. of Sci. & Technol., Harbin
Abstract :
The state-space description of the secondary-regulation hydrostatic transmission system is derived and the differential geometry theory of nonlinear system is proposed to transform the nonlinear system into a linear controllable one by coordinates transformation and state-space feedback. Based on the linearization model, the control law is achieved through optimal control theory of linear quadratic regulator(LQR). And this law is used to govern the former nonlinear model via transformation. At the same time, the influence on control performance of power matrix is discussed. Finally, the simulation results show that the system not only is free from the system steady error and overshoot, but also has good robust ability.
Keywords :
differential geometry; feedback; hydrostatics; linear quadratic control; linearisation techniques; nonlinear systems; robust control; state-space methods; LQR control; coordinates transformation; differential geometry theory; exact linearization; linear controllable; linear quadratic regulator; linearization model; nonlinear system; optimal control theory; power matrix; robust ability; secondary-regulation hydrostatic transmission system; state-space description; state-space feedback; system steady error; Automation; Control systems; Geometry; Intelligent control; Linear feedback control systems; Nonlinear control systems; Nonlinear systems; Optimal control; Power system modeling; State feedback; Coordinates transformation; Exact linearization; LQR control; Secondary regulation; State-space feedback;
Conference_Titel :
Intelligent Control and Automation, 2008. WCICA 2008. 7th World Congress on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-2113-8
Electronic_ISBN :
978-1-4244-2114-5
DOI :
10.1109/WCICA.2008.4594180
