Research of tension robust control based on mixed sensitivity

In order to get ideal tension control result, a H∞ robust controller based on mixed sensitivity is put forth for the dynamic instability and parametric uncertainty in the electromechanical tension system. The mathematic model for the dancer arm of tension system is set up through theoretical analysis; Then, the common method for designing robust controller based on mixed sensitivity is formulated; Finally, the weighting functions of mixed sensitivity function and complementary mixed sensitivity function are chosen, and the H∞ robust controller is designed. Comparison with the effect of conventional PID controller, the simulation result shows that the tension robust controller based on mixed sensitivity has excellent performance, such as good robust stability and interference suppression.