scholarly journals Time-Delay LPV System Control and Its Application in Chatter Suppression of the Milling Process

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Dazhong Wang ◽  
Shujing Wu ◽  
Lei Wan
Keyword(s):  
Time Delay ◽  
Milling Process ◽  
System Control ◽  
State Control ◽  
Chatter Suppression ◽  
Model Following Control ◽  
Model Following ◽  
Internal States ◽  
Lpv System ◽  
Control Methodology

This paper proposed a methodology for the control of model following control system (MFCS) approach to time-delay linear parameter-varying (LPV) system. The method incorporates a state control law which makes the output error zero, the bounded property of the internal states for the control is given, and the utility of this control design is guaranteed. Numerical example is given to demonstrate the effectiveness and less conservativeness of the proposed methods. The proposed control methodology is demonstrated on chatter suppression in the milling process.

A Design of the MFCS with Time-Delay

2011 ◽  
Vol 467-469 ◽  
pp. 1467-1471
Author(s):  
Da Zhong Wang ◽  
Shu Jing Wu ◽  
Fa Jiang He
Keyword(s):  
Control System ◽  
Time Delay ◽  
Output Signal ◽  
Time Delays ◽  
Reference Signal ◽  
Control Design ◽  
Numerical Examples ◽  
Model Following Control ◽  
Model Following ◽  
Internal States

We propose a design of model following control system (MFCS) with time-delays. The bounded property of the internal states for the control is given and the utility of this control design is guaranteed. It is confirmed on basis of numerical examples that the output signal of the control system asymptotically follows the reference signal in the case of the existence of disturbances.

scholarly journals Design of the Congestion Control for TCP/AQM Network with Time-Delay

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Dazhong Wang ◽  
Shujing Wu
Keyword(s):  
Time Delay ◽  
Transmission Control Protocol ◽  
Design Method ◽  
Nonlinear Behavior ◽  
Transmission Control ◽  
Model Following Control ◽  
Model Following ◽  
Communication Time ◽  
Internal States ◽  
The Stability

The purpose of this paper is to design congestion controller for TCP/AQM (transmission control protocol/active queue management) networks using model following control; the equilibrium of a class of TCP/AQM networks with time-delay is investigated, and the effect of communication time-delay on the stability is addressed. The features of this design method are bounded property of the internal states of the control system being given and the utility of this control. Such design exhibits important attributes including fast convergence with high accuracy to a desired queue length. Simulation results show that the time-delay nonlinear behavior of the system can be controlled by this method.

Design of the Model Following Control System for Robot Control System

2011 ◽  
Vol 467-469 ◽  
pp. 1462-1466
Author(s):  
Da Zhong Wang ◽  
Shu Jing Wu ◽  
Wu Shan Cheng ◽  
Min Liang Zhang
Keyword(s):  
Control System ◽  
Control Problem ◽  
Robot Control ◽  
Control Design ◽  
Control Law ◽  
Control Techniques ◽  
Model Following Control ◽  
Model Following ◽  
Input Control ◽  
Internal States

We propose a new study of the robot control by using model following control system (MFCS). With the MFCS method [1-5], we obtain a simple input control law. The bounded property of the internal states for the control is given and the utility of this control design is guaranteed. In this paper, MFCS control techniques are applied to robot control problem, and simulations are given to illustrate the effectiveness of the proposed method.

scholarly journals Design of the State Predictive Model Following Control System with Time-Delay

2009 ◽  
Vol 19 (2) ◽  
pp. 247-254 ◽  
Author(s):  
Dazhong Wang ◽  
Shujing Wu ◽  
Shigenori Okubo
Keyword(s):  
Control System ◽  
Time Delay ◽  
Predictive Model ◽  
The State ◽  
Delay Systems ◽  
Control Synthesis ◽  
Time Delay Systems ◽  
Model Following Control ◽  
Model Following ◽  
System With Time Delay

Design of the State Predictive Model Following Control System with Time-DelayTime-delay systems exist in many engineering fields such as transportation systems, communication systems, process engineering and, more recently, networked control systems. It usually results in unsatisfactory performance and is frequently a source of instability, so the control of time-delay systems is practically important. In this paper, a design of the state predictive model following control system (PMFCS) with time-delay is discussed. The bounded property of the internal states for the control is given, and the utility of this control design is guaranteed. Finally, examples are given to illustrate the effectiveness of the proposed method, and state predictive control techniques are applied to congestion control synthesis problems for a TCP/AQM network.

Study of the Time-Delay System with Integral-Type

2014 ◽  
Vol 716-717 ◽  
pp. 1680-1683
Author(s):  
Da Zhong Wang ◽  
Shu Jing Wu ◽  
Takao Akiyama
Keyword(s):  
Time Delay ◽  
Time Lag ◽  
Delay System ◽  
Integral Type ◽  
Time Delay System ◽  
Model Following Control ◽  
System Method ◽  
Input Control ◽  
Internal States ◽  
New Criterion

Time-delay is very often encountered in various technical systems, such as chemical processes, robotics, etc. The existence of pure time lag, regardless if it is present in the control or/and the state, may cause undesirable system transient response, or even instability. This paper discusses design of the time-delay system with integral-type. With the model following control system method, we obtain a simple input control law. The proposed methodologies are illustrated herein using example of the time-delay system. In this case, new criterion is proposed to ensure that internal states are stable.

Study of MFCS with Disturbances

2012 ◽  
Vol 482-484 ◽  
pp. 732-735
Author(s):  
Shu Jing Wu ◽  
Da Zhong Wang
Keyword(s):  
Control System ◽  
Control Design ◽  
Control Law ◽  
Model Following Control ◽  
Model Following ◽  
Input Control ◽  
Internal States ◽  
New Criterion

In this paper, we propose a study of the (MFCS) model following control system with disturbances. With the MFCS method, we obtain a simple input control law. The bounded property of the internal states for the control is given and the utility of this control design is guaranteed. In this case, a new criterion is proposed to ensure that internal states are stable.

Design of MFCS with Time-Delay for Chemical Processing System

2011 ◽  
Vol 467-469 ◽  
pp. 1456-1461 ◽  
Author(s):  
Shu Jing Wu ◽  
Da Zhong Wang ◽  
Shigenori Okubo
Keyword(s):  
Control System ◽  
Time Delay ◽  
Power Systems ◽  
Communication Systems ◽  
Reference Model ◽  
Linear Time ◽  
Processing System ◽  
Chemical Processing ◽  
Model Following Control ◽  
Model Following

We can design model following control system (MFCS) with time-delay whose internal states are bounded. Time-delay widely exists among controlled objects in computer control processes, power systems, chemical processing systems, metallurgical processing systems, environmental systems and communication systems transmission systems and other industrial production activities[1]～[5], and makes it difficult to evaluate effects of control system input signals in time, which will ineluctably deteriorate performance of the control system in automatically removing outside disturbances, and influence stability of the system. This paper discusses a design of predictive control of MFCS for the linear time-delay based on the model following control theory proposed by Okubo[6], and is thus considered to be innovative and applicable. It is confirmed on basis of a numerical example that the output signal of the control system asymptotically follows the reference model signal in the case of the existence of disturbances.

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