Fuzzy continuous gain scheduling H/sub /spl infin// control based on Taylor series fitting for robotic manipulators

Abstract

A new approach to the design of a fuzzy continuous gain scheduled H/sub /spl infin// controller based on Taylor series fitting for n-joint rigid robotic manipulators, which guarantees satisfactory dynamic characteristics in the whole movement range, is presented. This scheme combines the gain scheduled H/sub /spl infin// theory with LMI approach to design a continuous gain scheduled H/sub /spl infin// controller, which is applicable to systems with fast state variations so that the deficiency of the conventional gain scheduled controllers is overcome, with the use of Taylor series fitting. Fuzzy control is then incorporated so chat the designed controller possesses the characteristics of a fast response for large errors and a well-damped response for small errors. The system thus always has a good dynamic performance along with the variations of the system states. Simulations and experiments demonstrate the effectiveness of the designed controller.