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International Journal of Autonomic Computing


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International Journal of Autonomic Computing (1 paper in press)

Special Issue on: ICCASP 2018 Next-Generation Computing Technologies

  • Sliding mode approach for performance improvement of slow and fast dynamic uncertain systems   Order a copy of this article
    by Subhash Sankeswari, Rajan Chile 
    Abstract: In this paper, an extended sliding mode control(SMC) method is proposed for applications of general class of control systems based on low order model obtained from slow or fast dynamics systems. In the proposed method, the sliding mode controllers(SMCr)are designed based on the three term controller (PID) with first order filter sliding surface.The contribution of the work proposed in this paper is that the designed controller methodology is applicable to general uncommon class of single input and single output (SISO) systems having lower or higher order dynamics, oscillatory or monotonic behavior and with or without delay time in the behavior of the systems. The developed controller performs well under parametric variations and uncertainty in the system. The robust property of the proposed method is verified by applying an external fixed and variable load disturbances. The stability and robustness properties of the proposed controller are proved by means of Lyapunov stability theorem.The high frequency chattering phenomenon which commonly occurs in SMC laws,is significantly reduced by adopting the switching gain with the known parameters of the system.The performance of the proposed SM control method is validated with the help of simulation examples and results are compared with other control methods available in the literature.
    Keywords: Sliding Mode Control; Higher order; Performance Analysis; Systems andrnDynamics; Reduced Order Model; Parametric Uncertainty.