Title :
Simulate Research on High Precise Electro-hydraulic System Adjusted by Hybrid Fuzzy Controller
Author :
Meng, Jun-Xia ; Wang, Yu ; Wang, Xi-Bin
Author_Institution :
Sch. of Inf. Sci. & Technol., Beijing Inst. of Technol., Beijing, China
Abstract :
Combining Bang-Bang, fuzzy and integral control, a new hybrid controller is proposed for controlling a nonlinear, complex electro-hydraulic system with large moment of inertia of plant. Bang-Bang is adopted to reduce big error rapidly. Fuzzy and integral control enhances robustness of the controller, and eliminate steady-state-error completely. Integral coefficient is changed by a subordinate fuzzy controller online. As a result, Integral has faintly negative effect on system dynamic qualities, and eliminates steady-state-error fast. Using genetic algorithm to optimize scaling factors of main fuzzy controller offline in order to improve control performance. Finally, simulate analysis was made on MATLAB integrated plat. The result shows that the proposed controller has strong robustness, excellent dynamic and static index. It can satisfy control demand of the concerned system completely.
Keywords :
bang-bang control; electrohydraulic control equipment; fuzzy control; genetic algorithms; nonlinear control systems; stability; bang-bang control; complex electro-hydraulic system control; controller robustness; genetic algorithm; high precise electro-hydraulic system; hybrid fuzzy controller; integral control; nonlinear control; system dynamic qualities; Control nonlinearities; Control systems; Electric variables control; Error correction; Fuzzy control; Fuzzy systems; Information technology; Nonlinear control systems; Robust control; Steady-state; Bang-Bang control; Fuzzy+I control; electro-hydraulic system; genetic algorithm; hybrid control; integral with variable coefficient;
Conference_Titel :
Information Technology and Applications, 2009. IFITA '09. International Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-0-7695-3600-2
DOI :
10.1109/IFITA.2009.226