A so-called lumped disturbance is considered in the T-S fuzzy model of the system to be controlled. Under the circumstances, this paper proposes two controllers, in which one is designed only on the basis of the control system stability, and the other is designed on the basis of both the control system stability and a proposed disturbance observer. Simulation results make a comparison between the two controllers, and conclude that the control performance driven by the latter is better than the former.
['Xiaodong Zhang', 'Hugang Han', 'Dongyin Wu']
Fuzzy controllers with/without disturbance observer