Integral backstepping-based output feedback controller for the induction motor

2019 ◽  
Vol 41 (16) ◽  
pp. 4599-4612
Author(s):  
Soufien Hajji ◽  
Assil Ayadi ◽  
Youssef Agerbi Zorgani ◽  
Tarak Maatoug ◽  
Mondher Farza ◽  
...  
Keyword(s):  
Induction Motor ◽  
State Feedback ◽  
Controller Design ◽  
Systematic Method ◽  
Output Feedback Controller ◽  
Integral Action ◽  
Comparison Results ◽  
Control Scheme ◽  
The Stability ◽  
Transient And Steady State

This paper addresses the control of induction motor (IM) drives. In this work, we propose a new consideration of backstepping control. However, this control provides a systematic method to carry out the controller design while guaranteeing the stability of the controller-process couple. Furthermore, the incorporation of an integral action in the synthesis of the control system with state feedback presents a robust rejection of echelon-level disturbances. A detailed analytic study and simulation results are given showing the operation of the IM drives control. The results prove the accuracy and robustness of the proposed control scheme. Also, comparison results with another study dealing with control prove that the proposed method shows excellent transient and steady-state speed and a great estimation of flux and load torque.

Step Output Tracking Controller Design for Networked Control Systems

2013 ◽  
Vol 17 (6) ◽  
pp. 813-817
Author(s):  
Zhong-Hua Pang ◽  
◽  
Guo-Ping Liu ◽  
Donghua Zhou ◽  
◽  
...  
Keyword(s):  
Controller Design ◽  
Networked Control Systems ◽  
Design Procedure ◽  
Packet Dropout ◽  
Output Tracking ◽  
Trip Time ◽  
Control Scheme ◽  
Tracking Controller ◽  
Networked Predictive Control ◽  
The Stability

This paper is concerned with the step output tracking controller design problem for networked discretetime linear systems. The communication constraints such as network-induced delay, packet disorder, and packet dropout are considered, which are treated as the round-trip time (RTT) delay with an upper bound. An event-driven networked predictive control scheme is proposed to actively compensate for the RTT delay, which avoids the requirement of synchronization between the controller side and the plant side. The stability of the closed-loop system and the design procedure of the observer-based controller are discussed. A numerical example is employed to illustrate the effectiveness of the proposed methods.

A bilateral control scheme for vehicle steer-by-wire system with road feel and steering controller design

2017 ◽  
Vol 41 (3) ◽  
pp. 593-604 ◽  
Author(s):  
Hongyu Zheng ◽  
Jinghuan Hu ◽  
Yahui Liu
Keyword(s):  
Controller Design ◽  
Steering System ◽  
System Stability ◽  
Steering Wheel ◽  
Bilateral Control ◽  
Loop Control ◽  
Control Scheme ◽  
Steer By Wire ◽  
The Stability ◽  
Close Loop Control

Steer-by-wire (SBW) system replaces the mechanical linkages in a conventional steering system with electronic actuators. However, such a steering system has problems regarding how to harmonize angle and torque close loop control strategy whilst guaranteeing SBW system stability. Towards this problem, a bilateral control scheme is proposed for SBW system with steering and road feel feedback control. A new torque and angle feedback deviation type bilateral control scheme is designed based on the analysis of several typical bilateral control schemes. In this bilateral control scheme, it only needs to measure steering wheel angle, steering wheel torque, pinion angle and steering motor torque, whilst it does not need to estimate tire and road force, neither to deploy complicated and expensive sensors or devices. The Llewellyn stability criterion and wave variable control are used to analyze the influencing factors of the stability of the SBW system and to control the stability respectively. The transparency of the SBW system is analyzed based on the impedance theory. In order to improve vehicle handling, the road feel feedback torque is designed by using a compensation controller. The bilateral control scheme and compensation controllers are implemented and their performance is experimentally validated using test vehicle. Test results demonstrate the efficiency and effect of the proposed algorithm.

scholarly journals Synchronization for a Class of Fractional-Order Hyperchaotic System and Its Application

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Wen Tan ◽  
Feng Ling Jiang ◽  
Chuang Xia Huang ◽  
Lan Zhou
Keyword(s):  
Theoretical Analysis ◽  
Fractional Order ◽  
Secure Communication ◽  
Controller Design ◽  
Design Method ◽  
Hyperchaotic System ◽  
Response System ◽  
Control Scheme ◽  
The Stability ◽  
Hyperchaotic Systems

A new controller design method is proposed to synchronize the fractional-order hyperchaotic system through the stability theory of fractional calculus; the synchronization between two identical fractional-order Chen hyperchaotic systems is realized by designing only two suitable controllers in the response system. Furthermore, this control scheme can be used in secure communication via the technology of chaotic masking using the complex nonperiodic information as trial message, and the useful information can be recovered at the receiver. Numerical simulations coincide with the theoretical analysis.

scholarly journals A Nonlinear State Feedback for DC/DC Boost Converters

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
O. Gehan ◽  
E. Pigeon ◽  
T. Menard ◽  
M. Pouliquen ◽  
H. Gualous ◽  
...  
Keyword(s):  
State Feedback ◽  
High Gain ◽  
Stability And Convergence ◽  
Design Parameters ◽  
Robust Controller ◽  
Boost Converters ◽  
Control Approach ◽  
Integral Action ◽  
The Stability ◽  
Nonlinear State

This paper investigates the control problem for static boost type converters using a high gain state feedback robust controller incorporating an integral action. The robust feature allows to achieve the required performance in the presence of parametric uncertainties, while the integral action provides an offset free performance with respect to the desired levels of voltage. The adopted high gain approach is motivated by both fundamental as well as practical considerations, namely the underlying fundamental potential and the design parameter specification simplicity. The stability and convergence analysis has been carried out using an adequate Lyapunov approach, and the control system calibration is achieved throughout a few design parameters which are closely related to the desired dynamical performances. The effectiveness of the proposed control approach has been corroborated by numerical simulations and probing experimental results.

scholarly journals A Theoretical Concept of Decoupled Current Control Scheme for Grid-Connected Inverter with L-C-L Filter

2021 ◽  
Vol 11 (14) ◽  
pp. 6256
Author(s):  
Mohamad Amin Ghasemi ◽  
Seyed Fariborz Zarei ◽  
Saeed Peyghami ◽  
Frede Blaabjerg
Keyword(s):  
Control Method ◽  
Controller Design ◽  
Current Control ◽  
System Stability ◽  
State Equations ◽  
Lcl Filter ◽  
Control Scheme ◽  
Grid Connected Inverter ◽  
The Stability ◽  
Grid Side

This paper proposes a nonlinear decoupled current control scheme for a grid-connected inverter with LCL filter. Decoupling the active and reactive current control channels is one of the main demands in the control of inverters. For inverters with an L filter, the decoupling can be achieved by a proper feed-forward of grid voltages. However, the coupling of channels is a complex issue for converters with LCL filters. The resonance mode of the LCL filter may cause instability, which adds more complexity to the analysis. In this paper, state equations of the system are provided, which highlight the coupling between active and reactive currents injected into the grid. Accordingly, a non-linear control scheme is proposed which effectively decouples the channels and dampens the resonant modes of the LCL filter. The stability of the proposed control method is verified by the Lyapunov criterion. Independency of the system stability to the grid-impedance is another feature of the proposed approach. Moreover, only grid-side currents are needed for implementation of the proposed scheme, avoiding the need for additional current sensors for the output capacitor and grid-side inductor. For accurate modelling of the inverter, the computation and PWM sampling delays are included in the controller design. Finally, various case studies are provided that verify the performance of the proposed approach and the stability of the system.

Stable observer-based controller design for robust state-feedback pole assignment

2000 ◽  
Vol 214 (4) ◽  
pp. 313-318 ◽  
Author(s):  
G P Liu ◽  
G R Duan ◽  
S Daley
Keyword(s):  
Frequency Domain ◽  
Stability Problem ◽  
State Feedback ◽  
Closed Loop ◽  
Controller Design ◽  
Pole Assignment ◽  
Loop System ◽  
Closed Loop System ◽  
Sensitive Function ◽  
The Stability

The design of stable observer-based controllers for robust pole assignment is addressed in this paper. The stability problem of these dynamical controllers is investigated, which is often ignored during the controller design. A design formulation of stable observer controllers is presented using state-feedback pole assignment techniques. Although the design formulation is principally aimed at the design of a stable controller, the mixed sensitive function in the frequency domain is also considered to improve the robustness of the closed-loop system. This ensures that the closed-loop system has good robustness and the controller is stable.

scholarly journals On Finite-Time Feedback Control for Switched Discrete-Time Systems under Fast and Slow Switching

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Liaoliang Xiao ◽  
Mingyang Yu
Keyword(s):  
Output Feedback ◽  
State Feedback ◽  
Controller Design ◽  
Feedback Controller ◽  
Static State ◽  
Output Feedback Controller ◽  
Discrete Time Systems ◽  
Static State Feedback ◽  
Time Systems ◽  
Slow Switching

The problem of finite-time stabilization for switched discrete-time systems under both fast and slow switching is addressed. In the fast switching case, the designed static state feedback controller combines controllers for each subsystem and resetting controller at switching instant, it is shown that the resetting controller can reduce the conservativeness on controller design. Then the results are extended to output feedback controller design. Under slow switching, both static state feedback and output feedback controller are designed with admissible average dwell time, respectively. Several numerical examples are given to illustrate the proposed results within this paper.

scholarly journals Controller Design For Hybrid Systems With Nonlinear Sub-Systems Using Common Lyapunov Functions

2021 ◽  
Author(s):  
Zhi Fan ◽  
Yongchun Fang ◽  
Yinan Wu ◽  
Cunhuan Liu
Keyword(s):  
Hybrid Systems ◽  
Lyapunov Functions ◽  
Controller Design ◽  
Real Life ◽  
Poor Performance ◽  
Design Scheme ◽  
Satisfactory Performance ◽  
Control Scheme ◽  
Disastrous Effect ◽  
The Stability

Abstract Hybrid systems are common in real life and have been studied in many different fields. However, due to the interaction of different sub-systems, a hybrid system is much more complex than a mono-dynamic one, where great challenges are confronted when seeking stable controllers either for linear or nonlinear systems. The traditional design scheme for such a system, namely, to design a controller for each sub-system separately, cannot yield satisfactory performance, since the switches between sub-systems are not specifically considered. In fact, the controllers constructed in this way are usually of poor performance, or even unstable, as a disastrous effect caused by the alternation of sub-systems. In this paper, considering the aforementioned problem, a control scheme is proposed to design suitable controllers for hybrid systems to achieve overall stabilization by taking account of the switching behaviors of the system, as well as its sub-systems carefully. The design scheme consists of two steps, wherein the first step aims to design sub-controllers for different sub-systems, usually with different Lyapunov functions, while a common Lyapunov function candidate is composed in the second step to modify the previously designed sub-controllers correspondingly. Following this design scheme, not only the stability, but also the performance of the closed-loop hybrid systems, is successfully guaranteed. Some simulation results are provided to show the satisfactory performance of the proposed design scheme.

scholarly journals Robust Speed Controller Design Using H_infinity Theory for High-Performance Sensorless Induction Motor Drives

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 961 ◽  
Author(s):  
Ahmed A. Zaki Diab ◽  
Abou-Hashema M. El-Sayed ◽  
Hossam Hefnawy Abbas ◽  
Montaser Abd El Sattar
Keyword(s):  
Induction Motor ◽  
Controller Design ◽  
Dynamic Performance ◽  
Motor Drives ◽  
Operating Conditions ◽  
Motor Speed ◽  
Induction Motor Drives ◽  
Control Scheme ◽  
Wide Range ◽  
Speed Accuracy

In this paper, a robust speed control scheme for high dynamic performance sensorless induction motor drives based on the H_infinity (H) theory has been presented and analyzed. The proposed controller is robust against system parameter variations and achieves good dynamic performance. In addition, it rejects disturbances well and can minimize system noise. The H controller design has a standard form that emphasizes the selection of the weighting functions that achieve the robustness and performance goals of motor drives in a wide range of operating conditions. Moreover, for eliminating the speed encoder—which increases the cost and decreases the overall system reliability—a motor speed estimation using a Model Reference Adaptive System (MRAS) is included. The estimated speed of the motor is used as a control signal in a sensor-free field-oriented control mechanism for induction motor drives. To explore the effectiveness of the suggested robust control scheme, the performance of the control scheme with the proposed controllers at different operating conditions such as a sudden change of the speed command/load torque disturbance is compared with that when using a classical controller. Experimental and simulation results demonstrate that the presented control scheme with the H controller and MRAS speed estimator has a reasonable estimated motor speed accuracy and a good dynamic performance.

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