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Design of Optimized Fuzzy PD Cascade Controller Based on Parallel Genetic Algorithms

병렬유전자 알고리즘 기반 최적 Fuzzy PD Cascade 제어기의 설계

  • Received : 2008.11.19
  • Accepted : 2009.05.14
  • Published : 2009.06.25

Abstract

In this paper, we propose the design of an optimized fuzzy cascade controller for rotary inverted pendulum system by means of Hierarchical Fair Competition-based Genetic Algorithms (HFCGA) which is a kind of parallel genetic algorithms. The rotary inverted pendulum system is the system for controlling the inclination of pendulum axis through the adjustment of rotating arm. The control objective of the system is to control the position of rotating arm and to make the pendulum maintain the unstable equilibrium point of vertical position. To control rotary inverted pendulum system, we designs the fuzzy cascade controller scheme consisted of two fuzzy controllers and optimizes the parameters of the designed controller by means of HFCGA. A comparative analysis between the simulation and the practical experiment demonstrates that the proposed HFCGA based fuzzy cascade controller leads to superb performance in comparison with the conventional LQR controller as well as HFCGA based PD cascade controller.

Acknowledgement

Supported by : 한국학술진흥재단, U-city 보안감시 기술협력센터

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