It is impossible to install or apply position sensors appropriately in some special applications of PMSM. Sensorless PMSM control an appropriate choice solve problems the necessary acquire estimated precisely and avoid chattering phenomenon for sensorless control. This paper proposes algorithm estimating with sliding mode observer (SMO) based on sigmoid function, a sufficient condition that lea...

However, feedback linearization control does not guarantee robustness in the presence of modeling errors. In [3], ∞ H control and sliding mode control was proposed. ∞ H control is a computation expensive method that presents good disturbance attenuation performance. In [4], sliding mode control and PID controller was discussed. In [5], the PID controller was discussed. The PID controller is a s...

This paper proposes a novel adaptive intelligent global sliding mode control for the tracking of DC-DC buck converter with time-varying uncertainties/disturbances. The proposed law is formulated using switching surface that eliminates reaching phase and ensures existence action from start. derived based on Lyapunov stability theory. effectiveness approach illustrated via high-fidelity simulatio...

Abstract Because PMSM needs to install a position sensor in practical application, and the buffeting issue sensorless control stems from an old SMO (sliding mode observer), improved is proposed. Stemming improvement of switching function low-pass filter traditional SMO, chattering problem conventional optimized. Considering reality that PI strategy unable respond accurately quickly case current...

In this article, attitude maneuver control without unwinding phenomenon is investigated for rigid spacecraft via modified Rodrigues parameters. A novel switching function constructed by a hyperbolic sine to guarantee that the sliding surface contains two stable equilibria. mode controller developed ensure reachable. Moreover, dynamic parameter designed unwinding-free performance of closed-loop ...

A new variable exponential discrete-time sliding mode control (DSMC) reaching law is proposed to suppress the chattering phenomenon and accelerate speed for switching function. The consists of two-phase different term. main effect first phase reduce steps. second can decrease magnitude quasi-sliding-mode domain (QSMD). Otherwise, disturbance term restrained by order difference function which al...

This research study proposes a continuous finite-time controller based on the adaptive tuning approach for boost converters with unknown disturbances. A Lyapunov candidate function which contains an absolute fractional power of sliding surface is employed to attain smooth control input. The recommended technique can eliminate chattering phenomenon made by mode signal and improve performance. Fu...

Chaotic oscillation will occur in power system when there exist periodic load disturbances. In order to analyze the chaotic characteristics and suppression method, this paper establishes simplified mathematical model of interconnected two-machine analyzes nonlinear dynamic behaviors, such as phase diagram, dissipation, bifurcation map, spectrum, Lyapunov exponents. Based on fractional calculus ...

In this paper, a novel adaptive fuzzy sliding mode control method is proposed for the robust tracking control of robotic manipulators. The proposed controller possesses the advantages of adaptive control, fuzzy control, and sliding mode control. First, system stability and robustness are guaranteed based on the sliding mode control. Further, fuzzy rules are developed incorporating with adaptati...

A robust controller with chattering is proposed based on a simplified model of an electronic throttle system. The chattering term provides robustness against un-modeled nonlinearities, e.g., limphome nonlinearity, parameter dispersion, and friction phenomena. As the simplified model of the throttle system can be seen to correspond to a horizontal one-degree-of-freedom robot manipulator, the pro...