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.

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.

Multi-loop model-based control structure for robot manipulators

Robotica ◽  
2005 ◽  
Vol 23 (4) ◽  
pp. 491-499 ◽  
Author(s):  
Rafael Osypiuk ◽  
Bernd Finkemeyer ◽  
Friedrich M. Wahl
Keyword(s):  
Control Structure ◽  
Robot Manipulator ◽  
Loop Model ◽  
Loop Control ◽  
Model Based Control ◽  
Model Following Control ◽  
Model Following ◽  
Theoretical Assumptions ◽  
Quantitative Results ◽  
The Stability

Most nonlinear control concepts used in robotics are based on a more or less accurate inverse model of the robot. In contrast to this, the design and properties of a general $n$-loop control structure based on a divided forward model of the robot, the so-called multi-loop Model Following Control Structure ($n$-MFC), is presented in this paper. Its theoretical basics and its concept are explained. The stability and robustness of the proposed control structure is analyzed. The theoretical assumptions are verified in many experiments with a two-joint robot manipulator. Qualitative as well as quantitative results of the experiments are presented and discussed.

A design method of a model-following control system

2015 ◽  
Vol 13 (4) ◽  
pp. 843-852 ◽  
Author(s):  
Hiroki Shibasaki ◽  
Rubiyah Yusof ◽  
Yoshihisa Ishida
Keyword(s):  
Control System ◽  
Design Method ◽  
Model Following Control ◽  
Model Following

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 Improved global stability condition analysis for time-delay fast active queue management scalable transmission control protocol

2019 ◽  
Vol 15 (5) ◽  
pp. 155014771985193
Author(s):  
Jinfeng Huang ◽  
Lingjing Zeng ◽  
Xiaolong Chen
Keyword(s):  
Time Delay ◽  
Global Stability ◽  
Transmission Control Protocol ◽  
Active Queue Management ◽  
Maximum Growth ◽  
Stability Conditions ◽  
Queue Management ◽  
Transmission Control ◽  
Delay Term ◽  
Control Protocol

The nonlinear time-delay fast active queue management scalable transmission control protocol model was studied in this article. By analyzing the boundedness properties for solution trajectory of the fast active queue management scalable transmission control protocol model, the iterative relations of fast active queue management scalable transmission control protocol trajectory bounds were obtained. Furthermore, we calculated the maximum growth direction of the delay term in the integral interval and applied the backward method to calculate the lower conservative bound corresponding to each time of the delay term. Therefore, the global stability parameter condition of fast active queue management scalable transmission control protocol, which was less conservative than the existing global stability conditions, was obtained in this article. The validity of the stability conditions obtained in this article was verified by NS-2 simulation experiment.

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.

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