Introduction - If you have any usage issues, please Google them yourself
In essence, sliding mode variable structure control is a special kind of nonlinear control, whose nonlinear performance is the discontinuity of control. The difference between this control strategy and other controls is that the "structure" of the system is not fixed, but it can change purposefully in the dynamic process according to the current state of the system (such as deviation and its derivatives of each order, etc.), forcing the system to "slide" according to the preset State track motion of "dynamic mode".