A stepper motor is usually operated in position open-loop control for simplicity. However, order to improve the transient and steady-state performances of motor-based drive system, a high performance system designed feed encoder signal back form closed-loop such as general servo drive, high-performance speed loop controller can then be used overcome nonlinear characteristics motor, cogging forc...

Multiple-input and multiple-output (MIMO) systems can be found in many industrial processes, including mining processes. In practice, these are difficult to control due the interactions of their input variables inherent uncertainty Depending on MIMO process, different strategies implemented achieve desired performance. Among is use a decentralized structure that considers several subsystems for...

This paper presents a systematic approach to design a Lyapunov based super twisting differentiator. The differentiator will be shown convergent in a finite time whilst the relevant time is accurately estimated.  This differentiator is the main part to establish the sliding surface in higher order sliding mode. The differentiator  is used in the prescribed control structure  to regulate pressure...