Sliding mode switching control under arbitrary switchings in the presence of uncertain parameters

2017 ◽  
Vol 232 (4) ◽  
pp. 399-407 ◽  
Author(s):  
Lei Yu ◽  
Shumin Fei ◽  
Jun Huang ◽  
Zhiwei Hou
Keyword(s):  
Tracking Control ◽  
Sliding Mode ◽  
Tracking Error ◽  
Switching Control ◽  
Mode Switching ◽  
System Control ◽  
Uncertain Parameters ◽  
Control Performance ◽  
Error Performance ◽  
Control Scheme

In this article, we concerned with the tracking control problem for a class of single-input single-output discrete switched nonlinear systems in the presence of uncertain parameters. We address a discrete-time sliding mode switching control scheme via disturbance compensator technique using saturation function and arbitrary switching method which is an effective robust way to reduce the chattering phenomenon and improve system control performance. The resulting closed-loop switched system is proved to be robustly stable such that the sliding mode surface of the closed control system is well obtained and the accuracy of the tracking error performance can be reached. Simulation results of the of electro-hydraulic servo system show that the presented sliding mode switching control scheme gives better tracking control performance over traditional sliding mode control scheme without disturbance compensator.

Discrete-Time Sliding-Mode Switching Control Scheme With Disturbance Observer and Its Application to Superheated Steam Temperature Systems

2016 ◽  
Vol 138 (10) ◽  
Author(s):  
Lei Yu ◽  
Chun Zhang ◽  
Jun Huang ◽  
Shumin Fei
Keyword(s):  
Disturbance Observer ◽  
Superheated Steam ◽  
Sliding Mode ◽  
Tracking Error ◽  
Control Plant ◽  
Switching Control ◽  
Mode Switching ◽  
Steam Temperature ◽  
Superheated Steam Temperature ◽  
Control Scheme

In this paper, we have addressed a sliding-mode switching control scheme with disturbance observer for a class of single-input single-output (SISO) discrete switched nonlinear systems which suffer from uncertain parameters. To overcome the influences, the external disturbances, and uncertainty, an application of the boiler steam temperature control systems has been modeled as the control plant, and a disturbance compensator observer from the sliding-mode dynamics has been proposed to enhance robustness and decrease the system chattering. With the presented control scheme, using the feedback linearizable method and average dwell time technique, the closed-loop switching system is stable such that the output tracking error converges to a small neighborhood nearby zero and the sliding-mode surface can be well obtained. Experimental results of the superheated steam temperature systems have developed the better performance of the proposed control scheme over traditional sliding control strategy, which have demonstrated good accuracy of tracking error performance.

Robust neural network control of MEMS gyroscope using adaptive sliding mode compensator

Robotica ◽  
2014 ◽  
Vol 34 (3) ◽  
pp. 497-512 ◽  
Author(s):  
Juntao Fei ◽  
Yuzheng Yang
Keyword(s):  
Neural Network ◽  
Upper Bound ◽  
Tracking Control ◽  
Sliding Mode ◽  
Tracking Error ◽  
Modeling Error ◽  
External Disturbances ◽  
Mems Gyroscope ◽  
Control Scheme ◽  
The Impact

SUMMARYA new robust neural sliding mode (RNSM) tracking control scheme using radial basis function (RBF) neural network (NN) is presented for MEMS z-axis gyroscope to achieve robustness and asymptotic tracking error convergence. An adaptive RBF NN controller is developed to approximate and compensate the large uncertain system dynamics, and a robust compensator is designed to eliminate the impact of NN modeling error and external disturbances for guaranteeing the asymptotic stability property. Moreover, another RBF NN is employed to learn the upper bound of NN modeling error and external disturbances, so the prior knowledge of the upper bound of system uncertainties is not required. All the adaptive laws in the RNSM control system are derived in the same Lyapunov framework, which can guarantee the stability of the closed loop system. Comparative numerical simulations for an MEMS gyroscope are investigated to verify the effectiveness of the proposed RNSM tracking control scheme.

Adaptive sliding mode tracking control of hydraulic servosystems with unknown non-linear friction and modelling error

2000 ◽  
Vol 214 (4) ◽  
pp. 247-257 ◽  
Author(s):  
S H Cho ◽  
K A Edge
Keyword(s):  
Boundary Layer ◽  
Tracking Control ◽  
Sliding Mode ◽  
Tracking Error ◽  
Control Scheme ◽  
Non Linear ◽  
Linear Friction ◽  
Frictional Forces ◽  
Mode Tracking ◽  
Modelling Error

This paper deals with the use of adaptive discrete-time sliding mode tracking control in order to assure good tracking performance as well as to guarantee robustness against non-linear frictional forces and modelling error. The control scheme ensures that the absolute value of the sliding function decreases when it is outside the sliding boundary layer and the steady state value of the sliding function is bounded by the sliding boundary layer. Application of the scheme to a hydraulic servosystem has shown that adaptively estimated frictional forces compare favourably with those obtained from direct measurement. A significant reduction in tracking error is achieved through the use of non-linear friction compensation.

scholarly journals Adaptive Sliding-Mode Tracking Control for a Class of Nonholonomic Mechanical Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Wei Sun
Keyword(s):  
Finite Time ◽  
Tracking Control ◽  
Sliding Mode ◽  
Tracking Error ◽  
Mechanical Systems ◽  
Terminal Sliding Mode ◽  
Nonholonomic Mechanical Systems ◽  
Affine Constraints ◽  
Control Scheme ◽  
Mode Tracking

This paper investigates the problem of finite-time tracking control for nonholonomic mechanical systems with affine constraints. The control scheme is provided by flexibly incorporating terminal sliding-mode control with the method of relay switching control and related adaptive technique. The proposed relay switching controller ensures that the output tracking error converges to zero in a finite time. As an application, a boat on a running river is given to show the effectiveness of the control scheme.

scholarly journals Antidisturbance Vibration Suppression of the Aerial Refueling Hose during the Coupling Process

2017 ◽  
Vol 2017 ◽  
pp. 1-20
Author(s):  
Zikang Su ◽  
Honglun Wang
Keyword(s):  
Vibration Suppression ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Tracking Error ◽  
Measurement Noise ◽  
Aerial Refueling ◽  
Terminal Sliding Mode ◽  
Multiple Disturbances ◽  
Noise Simulation ◽  
Control Scheme

In autonomous aerial refueling (AAR), the vibration of the flexible refueling hose caused by the receiver aircraft’s excessive closure speed should be suppressed once it appears. This paper proposed an active control strategy based on the permanent magnet synchronous motor (PMSM) angular control for the timely and accurate vibration suppression of the flexible refueling hose. A nonsingular fast terminal sliding-mode (NFTSM) control scheme with adaptive extended state observer (AESO) is proposed for PMSM take-up system under multiple disturbances. The states and the “total disturbance” of the PMSM system are firstly reconstituted using the AESO under the uncertainties and measurement noise. Then, a faster sliding variable with tracking error exponential term is proposed together with a special designed reaching law to enhance the global convergence speed and precision of the controller. The proposed control scheme provides a more comprehensive solution to rapidly suppress the flexible refueling hose vibration in AAR. Compared to other methods, the scheme can suppress the flexible hose vibration more fleetly and accurately even when the system is exposed to multiple disturbances and measurement noise. Simulation results show that the proposed scheme is competitive in accuracy, global rapidity, and robustness.

Practical Tracking Control of a Class of Uncertain Surface Vessels Under Weak Assumptions on Uncertainties and Reference Trajectories

2021 ◽  
Author(s):  
Jian Li ◽  
Wenqing Xu ◽  
Zhaojing Wu ◽  
Yungang Liu
Keyword(s):  
Tracking Control ◽  
Broad Class ◽  
Tracking Error ◽  
Reference Trajectory ◽  
Unknown Parameters ◽  
Related Literature ◽  
Surface Vessels ◽  
Control Scheme ◽  
Reference Trajectories ◽  
Theoretical Results

Abstract This paper is devoted to the tracking control of a class of uncertain surface vessels. The main contributions focus on the considerable relaxation of the severe restrictions on system uncertainties and reference trajectory in the related literature. Specifically, all the system parameters are unknown and the disturbance is not necessarily to be differentiable in the paper, but either unknown parameters or disturbance is considered but the other one is excluded in the related literature, or both of them are considered but the disturbance must be continuously differentiable. Moreover, the reference trajectories in the related literature must be at least twice continuously differentiable and themselves as well as their time derivatives must be known for feedback, which are generalized to a more broad class ones that are unknown and only one time continuously differentiable in the paper. To solve the control problem, a novel practical tracking control scheme is presented by using backstepping scheme and adaptive technique, and in turn to derive an adaptive state-feedback controller which guarantees that all the states of the resulting closed-loop system are bounded while the tracking error arrives at and then stay within an arbitrary neighborhood of the origin. Finally, simulation is provided to validate the effectiveness of the proposed theoretical results.

Adaptive multi-dimensional Taylor network tracking control for a class of switched nonlinear systems with input nonlinearity

2020 ◽  
Vol 42 (13) ◽  
pp. 2482-2491
Author(s):  
Shan-Liang Zhu ◽  
De-Yu Duan ◽  
Lei Chu ◽  
Ming-Xin Wang ◽  
Yu-Qun Han ◽  
...  
Keyword(s):  
Nonlinear Systems ◽  
Tracking Control ◽  
Low Cost ◽  
Tracking Error ◽  
Switched Nonlinear Systems ◽  
Nonlinear Functions ◽  
Input Nonlinearity ◽  
Control Approach ◽  
Adaptive Tracking Control ◽  
Control Scheme

In this paper, a multi-dimensional Taylor network (MTN)-based adaptive tracking control approach is proposed for a class of switched nonlinear systems with input nonlinearity. Firstly, the input nonlinearity is assumed to be bounded by a sector interval. Secondly, with the help of MTNs approximating the unknown nonlinear functions, a novel adaptive MTN control scheme has the advantages of low cost, simple structure and real time feature is developed via backstepping technique. It is shown that the tracking error finally converges to a small domain around the origin and all signals in the closed-loop system are bounded. Finally, two examples are given to demonstrate the effectiveness of the proposed control scheme.

scholarly journals Output Feedback Adaptive Dynamic Surface Sliding-Mode Control for Quadrotor UAVs with Tracking Error Constraints

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-23 ◽  
Author(s):  
Guoqiang Zhu ◽  
Sen Wang ◽  
Lingfang Sun ◽  
Weichun Ge ◽  
Xiuyu Zhang
Keyword(s):  
Sliding Mode Control ◽  
Output Feedback ◽  
Controller Design ◽  
Sliding Mode ◽  
Tracking Error ◽  
Control Process ◽  
Nonlinear Observer ◽  
Dynamic Surface ◽  
Mode Control ◽  
Control Scheme

In this paper, a fuzzy adaptive output feedback dynamic surface sliding-mode control scheme is presented for a class of quadrotor unmanned aerial vehicles (UAVs). The framework of the controller design process is divided into two stages: the attitude control process and the position control process. The main features of this work are (1) a nonlinear observer is employed to predict the motion velocities of the quadrotor UAV; therefore, only the position signals are needed for the position tracking controller design; (2) by using the minimum learning technology, there is only one parameter which needs to be updated online at each design step and the computational burden can be greatly reduced; (3) a performance function is introduced to transform the tracking error into a new variable which can make the tracking error of the system satisfy the prescribed performance indicators; (4) the sliding-mode surface is introduced in the process of the controller design, and the robustness of the system is improved. Stability analysis proved that all signals of the closed-loop system are uniformly ultimately bounded. The results of the hardware-in-the-loop simulation validate the effectiveness of the proposed control scheme.

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