Sliding mode approach for performance improvement of slow and fast dynamic uncertain systems
by S.S. Sankeswari; R.H. Chile
International Journal of Autonomic Computing (IJAC), Vol. 3, No. 2, 2018

Abstract: In this paper, an extended sliding mode control (SMC) method is proposed for applications to general class of control systems. The proposed method is based on lower order models obtained from slow or fast dynamical 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 motivation for the proposed work in this paper is that the methodology adopted for controller design is applicable to general unknown class of SISO systems. This systems having lower or higher order dynamics, oscillatory or monotonic behavior and with or without time delay. The performance of designed controller is excellent for variation in parametric and unmodeled uncertainty in the system. The robust property of the proposed method is verified by applying an external load disturbances (fixed and variable). The stability and robustness of the proposed controller are investigated using Lyapunov stability theorem. The high frequency chattering phenomenon which commonly occurs in SMC controller, 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.

Online publication date: Thu, 31-Jan-2019

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Autonomic Computing (IJAC):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email