Sliding mode control for servo system with variable sliding line

The control system with sliding mode is both robust and fast-responding. It is also shown that this control scheme can be realized with simple algorithms. This paper presents results from analysis of the influence of current limits on the behavior of servo systems with sliding mode, and methods of engineering designs for the parameters of sliding mode controller under armature current limits. Laboratory experiments of the servo system are carried out with both fixed and variable sliding lines for the sliding mode controller in parameter changes of wide range. Results of these tests show that the author´s design approach is viable in real applications