Output feedback sliding mode control based on T-S model and application

Based on T-S model, a method is developed for designing output feedback sliding mode controller. As the state variables are immeasurable in practice, iterative linear matrix inequality (ILMI) is applied to build sliding manifold only with output information. According to the requirements of system performance, the parameter robust design method is adopted to configure the poles, mapping of parameters is computed correspondingly. Using Parallel Distributed Compensation Algorithm (PDCA), T-S fuzzy network controller is trained with mapping parameters to achieve equivalent control law. Furthermore, high gain method is designed to implement switch control law so that the system could satisfy the performance and be robustness with uncertain conditions. The simulation for helicopter control system shows that the method is practical and effective.