An Improved Sliding-Mode Current Control of Induction Machine in Presence of Voltage Constraints

Wang, Liuping; Mishra, Jyoti; Zhu, Yuankang; Yu, Xinghuo

doi:10.1109/tii.2019.2944228

Cited by 22 publications

(8 citation statements)

References 24 publications

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“…Step 2: Construct a Lyapunov function as V 2 = 1 2 s T 1 s 1 . By substituting ( 20) into (19), the time derivative of V 2 is given by…”

Section: Composite Attitude Tracking Controller Designmentioning

confidence: 99%

“…Among these nonlinear control methods, SMC method is an effective method due to its remarkable advantages in improving anti-disturbance performance and robustness of the system [18,19]. As an important branch of SMC method, the terminal sliding mode control (TSMC) method has more advantages because it guarantees the finite-time convergence of the closed-loop system, which is vital for the shipboard landing helicopter system since a fast landing process reduces the exposure of the helicopter to environment disturbances and thus reduces their effects to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

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Disturbance observer-based autonomous landing control of unmanned helicopters on moving shipboard

Yang

2020

Nonlinear Dyn

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In this paper, the autonomous landing control issue on moving shipboard is investigated for unmanned helicopters subject to disturbances. The issue is studied by stabilizing the error system of the helicopter and the shipboard. The landing process is divided into two phases, i.e., homing phase, where a hierarchical double-loop control scheme is developed such that the helicopter is forced to hover synchronously at a certain altitude over the shipboard, and landing phase, where a composite landing control scheme is proposed such that the helicopter lands vertically on the shipboard in synchronization with its attitudes. The velocity and acceleration information of the shipboard as well as lump disturbances are estimated through joint state and disturbance observers. The estimates are then incorporated into the baseline feedback controller, formulating composite active anti-disturbance landing control schemes. A continuous terminal sliding mode control method is proposed for the feedback controller design, which not only effectively mitigates the chattering of the control action, but also simplifies the design process of the controller. Numerical simulations demonstrate the effectiveness and superiorities of the proposed control schemes.

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“…Step 2: Construct a Lyapunov function as V 2 = 1 2 s T 1 s 1 . By substituting ( 20) into (19), the time derivative of V 2 is given by…”

Section: Composite Attitude Tracking Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Disturbance observer-based autonomous landing control of unmanned helicopters on moving shipboard

Yang

2020

Nonlinear Dyn

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show abstract

“…In addition, under actual complex working conditions, various uncertain disturbances such as changes in load seriously affect the response quality of the system [19]. Cao [20] designed a disturbance estimator for load resistance and thrust fluctuation and compensated for the disturbance estimated value, which solved the problem of load resistance and thrust fluctuation interference of the control system and significantly improved the positioning accuracy of the motor position.…”

Section: Introductionmentioning

confidence: 99%

Improved Sliding Mode-Active Disturbance Rejection Control of Electromagnetic Linear Actuator for Direct-Drive System

Tan

et al. 2021

Actuators

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The electromagnetic linear actuator is used as the core drive unit to achieve high precision and high response in the direct-drive actuation system. In order to improve the response performance and control accuracy of the linear drive unit, an improved sliding mode-active disturbance rejection control (ISM-ADRC) method was proposed. A motor model was established based on improved LuGre dynamic friction. The position loop adopts the improved integral traditional sliding mode control based on an extended state observer, and the current loop adopts PI control. The stability of the system is verified based on the Lyapunov theory. A nonlinear dilated state observer is used to effectively observe the electromagnetic linear actuator position and velocity information while estimating and compensating the internal and external uncertainty perturbations. At the same time, the saturation function sat(s) is used to replace the sign(s) and introduce the power function of the displacement error variable. The improved integral sliding mode control law further improves the response speed and control accuracy of the controller while reducing the jitter inherent in the conventional sliding mode. Simulation and experimental data show that the proposed improved sliding mode-active disturbance rejection control reduces the 8-mm step response time of the electromagnetic linear actuator by 21.9% and the steady-state error by less than 0.01 mm compared with the conventional sliding-mode control, while the system has 49.4% less adjustment time for abrupt load changes and is more robust to different loads and noise.

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“…The DOB control method has also been widely used in the current control of induction motors [19]- [23].For example, a new method is provided to improve the gain and phase margin of the DOB system in [21]. Moreover, investigation is made on the DOB method in the predictive current control in [22].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, investigation is made on the DOB method in the predictive current control in [22]. Also, a novel sliding-mode current control law with a disturbance observer is proposed for current regulation of induction motors in [23]. However, few of them has a synthetical discussion on the robust stability of the DOB method in the current control of induction motors.…”

Section: Introductionmentioning

confidence: 99%

Robust Current Control of Voice Coil Motor in Tip-Tilt Mirror Based on Disturbance Observer Framework

et al. 2021

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In this paper, a control methodology based on the disturbance observer (DOB) framework is proposed to improve the current dynamic characteristic and the robustness of the voice coil motor (VCM) in the tip-tilt mirror. It is shown that the open-loop current characteristic is a third-order plant, which is influenced obviously by both the electrical and mechanical uncertainties under different environment temperatures. Although the traditional PID control is helpful to improve the current dynamics, it is not able to provide enough robustness. Therefore, a new control methodology based on DOB is proposed. The plant model is simplified from third-order to first-order by considering the back-electromotive force (EMF) as the disturbance. The perturbation of the electrical parameters is compensated by the inner-loop of the DOB framework, and the perturbation of the mechanical parameters is compensated by suppressing the back-EMF. Moreover, new sufficient conditions for robust stability are presented in the control method based on H ∞ algorithm. Compared with the traditional researches, the upper bound of the uncertainties is calculated directly in this paper. Therefore, the ranges of the electrical parameters are very clear according to the Qfilter. Based on the stability conditions, new design guidelines for the DOB-based robust current control for induction motor are also presented. Experiment results are given to show the design details and the superiority of the proposed control method.

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An Improved Sliding-Mode Current Control of Induction Machine in Presence of Voltage Constraints

Cited by 22 publications

References 24 publications

Disturbance observer-based autonomous landing control of unmanned helicopters on moving shipboard

Disturbance observer-based autonomous landing control of unmanned helicopters on moving shipboard

Improved Sliding Mode-Active Disturbance Rejection Control of Electromagnetic Linear Actuator for Direct-Drive System

Robust Current Control of Voice Coil Motor in Tip-Tilt Mirror Based on Disturbance Observer Framework

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