Conventional sliding mode control (SMO) utilizes a sign function and low-pass filter (LPF) to achieve sensorless of permanent magnet synchronous motor (PMSM). However, the introduction generates large number high harmonics, resulting in significant system output chattering, whereas addition LPF delays phase shifts. These degrade PMSM speed position estimation accuracy reduce performance. To imp...

In this paper, a sliding mode controller is applied to control the cubic Chua’s circuit system. The sliding surface of this paper used is one dimension higher than the traditional surface and guarantees its passage through the initial states of the controlled system. Therefore, using the characteristic of this sliding mode we aim to design a controller that can meet the desired specification an...

The design of chaos-based secure communication via synchronized modified Chua’s systems is investigated in this paper. A continuous control law is proposed to ensure synchronization of the master and slave modified Chua’s systems by using the variable structure control technique. Particularly, the concept of extended systems is introduced such that a continuous control input is obtained to avoi...

A new discrete-time integral sliding mode control scheme is proposed for a class of linear multi-input systems with state delays. Based on the Lyapunov stability theory and one-step delayed disturbance approximation, a sliding mode controller not only drives the sliding mode into the O(T ) boundary, but also achieves the O(T ) boundary for state regulation. A novel integral sliding surface is i...

Chattering alarms repeatedly make transitions between alarm and non-alarm states without response from operators, and severely deteriorate the performance of industrial alarm systems. Two rules are formulated based on the metrics of alarm durations and intervals to detect chattering alarms caused by random noise and oscillation. An online method is proposed to reduce the number of the chatterin...

This work deals with the design of a FDI scheme on the basis of sliding mode techniques for a 3 three tanks system. More precisely, we focus on the design of high-order sliding mode observer to estimate the magnitude of the actuator faults. The main advantage of the use of high order sliding mode techniques is that it allows to avoid the chattering phenomenon which is inherent to the classical ...

This paper presents controlling of a class of nonlinear systems with structured and unstructured uncertainties using fuzzy sliding mode control. First known dynamics of the system are eliminated through feedback linearization and then fuzzy sliding mode controller is designed using TS method, based on the Lyapunov method, which is capable of handling uncertainties. There are no signs of the und...

This paper discusses a new design of chattering reduction for sliding mode control. Conventionally, a boundary layer around the sliding surface is used to achieve smooth control signals. However, the boundary layer design become in-effective in chattering reduction when there is high-level measurement noise. To solve this problem, this paper proposes a dynamic sliding mode control, which, with ...

In this paper, an adaptive tracking controller is proposed using Extremum-seeking strategy. For unknown disturbances satisfying matching condition, the controller can adaptively seek for a proper magnitude level large enough for disturbance rejection without excessive control efforts. The proposed control strategy is robust to disturbances and uncertainties and is continuous in nature. As a res...

Permanent magnet Synchronous machines (PMSM) provide high efficiency, compact size, robustness, lightweight, and low noise; these features qualify them as the best suitable machine for medical applications. Without forgetting its simple structure, high thrust, ease of maintenance, and controller feedback, make it possible to take the place of steam catapults in the future. This paper presents t...