Simulation and Numerical Analysis in the Steady State Error (S.S.E) Performance of the Variable Structure Control System ( VSC ) at Different Types of Switching Sequences Conditions (S.S.C)

Abd AL-Sataar Abd AL-Majeed, Nadia; Abbas Jumaa, Fadhel; Khudheyer Latif, Haider; Hassan Ali, Mohanned

	Simulation and Numerical Analysis in the Steady State Error (S.S.E) Performance of the Variable Structure Control System ( VSC ) at Different Types of Switching Sequences Conditions (S.S.C)
Journal of University of Babylon
Article 1, Volume 21, Issue 4, 2013, Pages 1278-1288
Authors
Nadia Abd AL-Sataar Abd AL-Majeed; Fadhel Abbas Jumaa; Haider Khudheyer Latif; Mohanned Hassan Ali
Abstract
In this research many tests are accomplished to different types of variable structure controller which operated by sequence timing period. A second and third order control systems are used as a mathematical fundamental to analysis the controller under test. It is found that the proper choosing of arrangement alteration between the structures S1 and S2 is achieved by using the proportional or the proportional-integral controllers separately. This will lead to treatment the steady state error and increasing the stability of control system. Also, the efficiency of the control system will be increased depending on some types of switches such as Rss or Iss which are defined by Vss value and exterior disturbances as shown in the design of robot arm and electric lifts. In this work, we found that depending on the type of switch, the control system may fail in disturbances and a steady state error treatment that is result in a fail in alteration between the two structures S1 and S2 of the control system. This will give unsatisfactory response of the control system. Best results are achieved by using intelligent control system where the information is compared by using a feedback system.

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