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A sliding-mode based repetitive control (SMRC) is presented in this paper to improve tracking periodic reference, rejecting disturbance, and adapting parameter uncertainty such as mass or viscous friction variation. The design method is simple with reduced order algorithm. The stability analysis is conducted, and the design conditions are derived for a stable system. Then, the proposed algorithm is...
In this paper, a sliding mode learning controller is developed for connection-oriented communication networks. Firstly, a networking system is modelled as discrete-time nth-order dynamic system subject to time-varying delay, the congestion control problem in communication networks is then addressed by adopting a novel sliding mode learning controller. The proposed learning controller not only suppresses...
This article presents a Robust Sliding Mode Control (RSMC) applied to a unified power flow controller (UPFC) to achieve rapid and finite time reference signal tracking of power flow in presence of plant uncertainties. RSMC is a nonlinear control based on the Lyapunov's stability and variable structure control theories to cancel disturbances and overcome the drawback of traditional linear PI control,...
This paper proposes a sensorless high-order super twisting sliding mode control method for induction motor speed servo systems. Based on the vector control principle, high-order super twisting sliding mode controllers in speed loop, current loop and flux loop are designed respectively. The super twisting sliding mode control is utilized to improve the response speed and robustness of motor control...
In active electromagnetic suspension system, the motor speed performance is vital to the suspension performance. However, PI speed controller is not robust against the parameter variations and load disturbances. To solve the problem, a high-order sliding mode (HOSM) speed control algorithm for tubular fault-tolerant linear permanent magnet (TFT- LPM) motor is proposed. The algorithm is characterized...
The paper proposes a robust guidance law with high-order sliding mode variable structure to handle the problems of poor convergence and the control chattering variable structure considering limited guidance information when the target is suffering the high maneuver interception. A sliding surface is illustrated with finite time convergence. The high-order sliding mode variable structure guidance law...
This paper proposes two robust control methods for swing-up and stabilization of a rotary inverted pendulum. A coupled sliding mode controller and an integral backstepping sliding mode controller are proposed here. These controllers provide aggressive swing-up and stabilization without involving a switching scheme between the swing-up mode and the stabilization mode. Robustness of both controllers...
This research makes the Lorentz chaotic system to be synchronized with the Lü chaotic system. For synchronizing between the two continuous chaotic systems, an adaptive sliding-mode control (ASMC) based on time-delay control (TDC) is applied. TDC estimates uncertainties using time-delayed values, and inserts a reference model into the system. In addition, to deal with irregular behaviors of the chaotic...
This paper describes the tracking of flight height andpitch angle of a helicopter model using output feedbackcontroller. A sliding mode control (SMC) methodology based onfeedback linearization and constant plus proportional reachinglaw is used. The sliding mode control method is robust withdisturbances. The mathematical model of helicopter is simplifiedby using dynamic inversion uncoupling linearization...
This paper investigates the voltage regulation in a quadratic boost converter with high DC gain using sliding mode control. In the proposed scheme, the controller has an inner loop based on sliding-mode control whose sliding surface is defined for the input inductor current. The reference current value of the sliding surface is generated using a proportional-integral compensator in the outer loop...
Superconducting quantum systems are promising candidates for quantum information processing due to their scalability and design flexibility. However, real quantum systems usually suffer from decoherence caused by environment disturbance. This effect, together with parametric error and un-modelled dynamics, usually leads to uncertainties in system models, which will destroy the system's excellent quantum...
A sliding mode controller is proposed for the robust control of both the position and attitude of a quadrotor. The design is tested in simulation. The performance is compared with a proportional plus derivative controller. The robustness of the design is also tested for parametric uncertainty. The effect of disturbances is also investigated. It is found that the sliding mode controller provides good...
To attenuate the effects of inertia uncertainty and external disturbance of combined spacecraft on attitude control accuracy and stability, a composite control law by combining nonlinear disturbance observer (NDO) and backstepping sliding mode control is proposed. In this paper, the nonlinear disturbance observer (NDO) is added to observe the unknown inertia and external disturbance, and asymptotic...
We present a feedback control scheme for a hybrid bidirectional interlinking converter of an alternating current (AC)/direct current (DC) microgrid. The output voltage and current are measured which allow us to design a suitable control for the power flow. We propose a robust droop control strategy to cater for the uncertain voltage and frequency droop caused by load variations. The proposed droop...
This paper concentrates on attitude control and spot hover about the hex-rotor Unmanned Aerial Vehicle (UAV). First of all, according to the Newton - Euler equation, set up the equations of motion in inertial frame. Then based on the characteristics of the hex-rotor UAV model, adaptive backstepping sliding mode controllers are designed to realize the attitude and position control. Finally, the control...
This paper proposes an effective method to balance the confliction between higher steady-state precision and stronger robustness in sliding-mode control systems. Different from the conventional two-phase-based sliding-mode control, the proposed sliding-mode control (SMC) is divided into a three-phase-based control, which include the first reaching phase, the second sliding-mode moving phase and the...
Incremental Adaptive Control is proposed to design the control allocation for a V-Tail UAV. This approach is able to improve performance and reliability when the UAV experiences external disturbance and parametric uncertainties. In this paper, a sliding mode control (SMC) based technique is used as baseline controller to develop this incremental adaptive control. This baseline controller sets the...
In this paper, an adaptive neural network fast terminal sliding mode(ANNFTSM) control method is proposed, which is applied for a class of SISO uncertain nonlinear systems output tracking issue. Because neural network system has the ability to identify the uncertainty online, we combine RBF neural network with fast terminal sliding mode controller. Not only will this successfully solve the problem...
Application of quantum measurement to control system plays an important role in quantum information processing or other field. Since any real system must interact with surrounding environment, one has to consider the quantum measurement and control about open system. This paper investigates the problem of robustness for a single qubit with operator errors, which enlarges the field of quantum robustness...
In this paper, a super-twisting sliding mode controller with a time-varying sliding surface is proposed for electronic throttle control. The idea behind this control algorithm is to utilize a fuzzy logic controller to vary the sliding surface based on error variables, error and its first time derivative. The simulation results have confirmed the improved dynamic performance of the proposed control...
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