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Though sliding mode variable structure controller has good robustness and high stability, its chattering phenomenon is widely exist. A fuzzy sliding mode controller is designed based on exponential approach law by combining sliding control and fuzzy control in this paper. The computer simulation is applied to verify the advance of the fuzzy sliding mode controller and the controller is applied to...
This paper presents a general form for the fast terminal sliding mode (FTSM). It is shown that the proposed form not only includes the conventional FTSM, but also provides new types of FTSM which can have a faster convergence rate than the conventional one. More importantly, the convergence time of the new FTSM models is bounded for any initial value, which means an upper bound of the convergence...
Sliding mode control is a typical nonlinear control strategy which was easy realized and with strong robustness, in this paper, a neuro sliding mode controller was designed with RBF neural networks and the stability of the proposed control scheme is proved by Lyapnouv theorem. For the chattering of sliding mode control are often derive from switching gain, the gain was adjusted with neural networks...
This letter introduces a strategy design of sliding mode control (SMC) for two-dimensional (2-D) systems. The dynamic updating of the 2-D system is considered as a Roesser model (RM). The proposed method consists of two stages, switching surface design and control law design. Moreover, the robustness of the proposed method for an uncertain system has been investigated. Simulation results verify the...
This research aims to construct sliding mode control (SMC) system that decreases chattering in controlled object of discrete time system. In conventional SMC, chattering has been generated by turbulence's influencing the state, and repeating operation that jumps over switching hyperplane. Then, we thought about switching hyperplane that always moved according to the change in the state. The feature...
In this paper, we have concentrated on real systems consisting of structural uncertainties and affected by external disturbances. In this regard, sliding mode control (S.M.C.) is utilized. To decrease energy consumption, arising from chattering phenomenon, a smooth switch has been used in design procedure. Consequently, sliding equation will play a dominant controlling role in its neighborhood. The...
The position tracking control of a missile electrohydraulic servo mechanism is studied. Since the dynamics of the system are highly nonlinear and have large extent of model uncertainties, such as big changes in load and parameters, a design method of adaptive fuzzy sliding mode control is presented. The adaptive fuzzy controller is introduced to approach the equivalent control of sliding mode control,...
This paper proposes an integrated PI controller for improved steady state performance and a sliding mode controller for high transient performance. A fuzzy logic controller is implemented to switch between them. Stability is achieved using a design procedure based on Lyapunov function and the feasibility of implementing such a controller is verified on a highly nonlinear system, an induction motor.
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