Analysis and Evaluation of Current Control System of PMSM with Time-Delay to Improve Parallelization for Implementation on Multi-core Precessors

This article presents a control strategy that enables both islanded and grid-tied operations of a three-phase inverter in distributed generation. This distributed generation (DG) is based on a dramatically evolved direct current (DC) source. A unified control strategy is introduced to operate the interface in either the isolated or grid-connected modes. The proposed control system is based on the instantaneous tracking of the active power flow in order to achieve current control in the grid-connected mode and retain the stability of the frequency using phase-locked loop (PLL) circuits at the point of common coupling (PCC), in addition to managing the reactive power supplied to the grid. On the other side, the proposed control system is also based on the instantaneous tracking of the voltage to achieve the voltage control in the standalone mode and retain the stability of the frequency by using another circuit including a special equation (wt = 2πft, f = 50 Hz). This utilization provides the ability to obtain voltage stability across the critical load. One benefit of the proposed control strategy is that the design of the controller remains unconverted for other operating conditions. The simulation results are added to evaluate the performance of the proposed control technology using a different method; the first method used basic proportional integration (PI) controllers, and the second method used adaptive proportional integration (PI) controllers, i.e., an Artificial Neural Network (ANN).

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Design of Electric Control System of Stainless Steel Composite Plate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.706-708.716 ◽

2013 ◽

Vol 706-708 ◽

pp. 716-719

Author(s):

Jian Chu ◽

Gang Wang

Keyword(s):

Stainless Steel ◽

Control System ◽

Composite Plate ◽

Current Control ◽

Equipment Operation ◽

Electric Control ◽

Control Scheme ◽

Steel Composite ◽

Machine Interface ◽

Electrical Components

This paper mainly introduced to the PLC as the core of stainless steel composite plate electric control part of the design. The system uses the converter +PLC+ man-machine interface, as the major part of roll welding machine control, because of the use of the PLC, so that the system can improve the automatic level, electrical components is reduced, reduce failure rate, improve the reliability of equipment operation. Based on the current control and speed control, so that the welding quality and welding speed has been greatly improved. In the article, mainly from the production process, and the control system hardware and software design, and the control scheme to introduce several aspects.

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Divided Design of Bilateral Control System and Compensation for Instability by Time Delay.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.64.1772 ◽

1998 ◽

Vol 64 (621) ◽

pp. 1772-1779 ◽

Cited By ~ 2

Author(s):

Hideo FUJIMOTO ◽

Akihito SANO ◽

Masayuki TANAKA ◽

Takashi HANAI

Keyword(s):

Control System ◽

Time Delay ◽

Bilateral Control

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Fault Diagnosis Method for a Network Control System with Long-Time Delay and Data Packet Loss Based on H∞ Filtering

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.846-847.795 ◽

2013 ◽

Vol 846-847 ◽

pp. 795-798

Author(s):

Jiao Meng ◽

Qi Hua Xu ◽

Xiao Xiao

Keyword(s):

Control System ◽

Fault Diagnosis ◽

Time Delay ◽

Packet Loss ◽

Estimation Error ◽

Network Control ◽

Data Packet ◽

Practical Significance ◽

Network Control System ◽

Long Time

Improving network control system---NCS reliability and safety has important practical significance because NCS is a hot research subject in these years. Fault diagnosis methods are researched in this paper according to NCS with long-time delay and data packet loss. Firstly, given a NCS with long-time delay, a state observer is structured. Secondly, make the state estimation error equation equivalent to an asynchronous dynamical system having event incidence constraint according to whether the system having data packets loss. The problem of fault diagnosis is converted to filtering problem through structuring filtering residual system based on the observer, then giving a corresponding filter designing algorithm. The designed fault diagnosis filter system not only make sure the stability of the closed loop system but also make the residual systems norm less than given reduction level. Finally, the simulation results prove that the algorithm can diagnose faults effectively.

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Research on the Character of a Synchronous Control System with Wireless Data Communication

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.455.206 ◽

2010 ◽

Vol 455 ◽

pp. 206-210

Author(s):

Jun Li Liu ◽

Yan Yan Yan ◽

G.Q. He

Keyword(s):

Control System ◽

Time Delay ◽

Data Transmission ◽

Data Communication ◽

Control Model ◽

Data Loss ◽

Wireless Data ◽

Synchronous Control ◽

Wireless Data Transmission ◽

Set Up

It discusses the reasons of the data transmission time delay and packets loss based on the theory of net data transmission. Aimed to the question of the time delay of data transmission and packets loss, the control system models are set up to analyze their influence to the performance of the control system. Based on the synchronous control model analysis with wireless data transmission, a method to control the system is reached with the state prediction when the communication error or data loss appears. It can control constantly when communication errors appear, and also it can get the most error period by numerical analysis.

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