 Artificial immune system (AIS) approaches, which are used in this work, are learning and optimization methods that can be applied to find the solution of many types of optimization problems. This paper presents an AIS approach applied to optimize the design of an incremental discrete variable structure controller (VSC) for minimizing the generalized minimum variance (GMV) strategy. Control de...

Variable structure refers to the ability of a system to dynamically change its structure according to different situations. It provides component-based modeling and simulation environments with powerful modeling capability and the flexibility to design and analyze complex systems. In this paper, we discuss variable structure, specifically the structure and interface change capability, in DEVS-b...

the safavid dynasty was the first iranian centralized administration, which chose shia’a branch of islam as the official religion and the judicial system for iran. in safavi period the state officially established two separate and distinct court system. first the state courts (the urf courts) under the supervision of the secular minister of justice (divan-begi) and the secondly the islamic cour...

Variable structure control system design methods are applied to the problem of aircraft spin recovery. A variable structure control law typically has two phases of operation. The reaching mode phase uses a nonlinear relay control strategy to drive the system trajectory to a pre-defined switching surface within the motion state space. The sliding mode phase involves motion along the surface as t...

In this paper, a Robust adaptive neural network controller (RANNC) based on variable structure system for robotic manipulators is proposed to alleviate the problems met in practical implementation using classical variable structure controllers. The chattering phenomenon is eliminated by substituting single-input single-output radialbasis-function neural networks (RBFNN's), which are nonlinear a...

The variable structure control theory based on estimated model is proposed in this paper. The ARX theory is applied to figure out the parameters of estimated model of unknown system on-line. According to the estimated, the variable structure control can be developed and implemented to this unknown system like known system. The equivalent controller of variable structure control rule will work t...

This paper presents an alternate approach for designing power system stabilizers (PSS) based on variable structure control to enhance small signal stability of Single Machine Infinite-Bus Power System (SMIB). The state feedback gains and switching surface have been tuned using Global Optimization (multistart clustering GO) for an Eigen value based performance index. The robustness of the propos...

Traditional Double-fed Wind Generation systems are based on the vector control method, and it dependents on motor parameters. The performance of the control system will be affected with the parameters changing. This paper proposes a new control method based on inverse system and variable structure sliding mode (VSS) theories, through the inverse system theory, the structure of its state’s equat...