Tension control technology is one of the common technologies exclusively used in the engineering industry such as coating, IC manufacture, printing equipment, fibre wind and ect. Along with the modem wind machine developing to higher speed and precision, tension control technology becomes more important. Due to the fact that tension system can be affected by many facts and its structures are complex, as well as its deep coupling, nonlinearity, time-variability, and indeterminacy of its parameters, ...