Research on the Relationship between Speed Control System and Electromechanical Oscillations

2015 ◽  
Vol 710 ◽  
pp. 47-52 ◽  
Author(s):  
Ya Qing Zhu ◽  
Min Zhong ◽  
Yu Jia Ma ◽  
Feng Ping Pan ◽  
Ling Ling Shi ◽  
...  
Keyword(s):  
Control System ◽  
Steam Turbine ◽  
Time Constant ◽  
Response Rate ◽  
Speed Control ◽  
Servo Motor ◽  
Speed Control System ◽  
Hydraulic Servo ◽  
The Impact ◽  
The Relationship

The system damping of electric power systems is influenced by factors of many aspects. In this paper, we analyzed the impact of speed control system on the damping of the whole system in consideration of the Pole-Zero Analysis. The result shows that simple speed control would damp the oscillation, while the power-frequency control would excite the oscillation. Furthermore, the effect of steam turbine response rate on the system damping is analyzed. The time constant of hydraulic servo-motor would determine the response rate of the steam turbine, and as a result, an inflection point exists on the curve which describes the relationship between hydraulic servo-motor time constant and system damping. The result demonstrates that the characteristics of system damping can be used in parameter debugging of steam turbine.

scholarly journals Precision Analysis and Design of Rotating Coil Magnetic Measurements System

2020 ◽  
Vol 10 (23) ◽  
pp. 8454
Author(s):  
Soontorn Odngam ◽  
Chaiyut Preecha ◽  
Prapaiwan Sanwong ◽  
Woramet Thongtan ◽  
Jiraphon Srisertpol
Keyword(s):  
Magnetic Field ◽  
Control System ◽  
Magnetic Measurements ◽  
Speed Control ◽  
Measuring Instruments ◽  
Dipole Magnet ◽  
Analysis And Design ◽  
Speed Control System ◽  
The Impact ◽  
The Magnetic Field

This research presents the design and construction of measuring instruments for a dipole magnetic field using a rotating coil technique. This technique is a closed-loop speed-control system where a Proportional-Integral (PI) controller works together with the intensity measurement of the magnetic field through the rotating coil. It was used to analyze the impact on the accuracy of the electromagnetic at speed ranges of 60, 90, and 120 rpm. The error estimation in the measurement of the normal dipole and skew dipole magnet caused by the steady-state error of the speed control system and the rotational search coil in whirling motion are demonstrated. Rotating unbalance, shaft coupling, and misalignment from its setup disturbed the performance of the speed control system as a nonlinear system.

Study on Speed Control System of Fluid-Driven In-Pipe Robot

2009 ◽  
Vol 16-19 ◽  
pp. 249-253
Author(s):  
Jian Yong Li ◽  
Xiao Bo Su ◽  
Lai Jiang ◽  
Rong Li Li ◽  
Xing Hua Gao ◽  
...  
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Speed Control ◽  
Flow Area ◽  
Through Flow ◽  
Speed Control System ◽  
Loop Feedback ◽  
Speed Stability ◽  
Closed Loop Feedback ◽  
The Relationship

The fluid-driven in-pipe robot is developed. Speed control system was model analyzed and the relationship between the load that affect the speed stability and through-flow area was derived, and the speed control system including double closed-loop feedback part was built.

Design and Implementation of Servo Motor Speed Control System Based on STM32

2013 ◽  
Vol 427-429 ◽  
pp. 999-1002
Author(s):  
Jiang Yi Liu ◽  
Shu Ying Sun
Keyword(s):  
Control System ◽  
Pulse Width Modulation ◽  
Speed Control ◽  
Servo Motor ◽  
Motor Speed ◽  
Embedded Microprocessor ◽  
Speed Control System ◽  
Absolute Encoder ◽  
Expert Pid ◽  
Modulation Speed

A speed control servo system based on STM32 is designed in order to realize the rapid, accurate, smooth speed control of rotary table. the system uses embedded microprocessor STM32F103 as the core, using the absolute encoder as the position sensor.The system achieved control of motor speed by PWM (pulse width modulation).Speed and current double loops control is used,and the expert PID control is used as the control algorithm. Through the analysis of the experimental results can be seen that the system has good stability, and the static and dynamic indicators meet the design accuracy.This design basically has reached the requirement of the servo motor speed control system.

Design of Hydraulic Cylinder Speed Control System Base on High-Speed on-Off Valve

2012 ◽  
Vol 220-223 ◽  
pp. 1661-1664
Author(s):  
Qin He Gao ◽  
Wen Liang Guan ◽  
Hai Zhou Song ◽  
Zhi Yong Yang
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
High Speed ◽  
Speed Control ◽  
Hydraulic Cylinder ◽  
Pulse Control ◽  
Parallel Application ◽  
Speed Control System ◽  
Small Flow ◽  
The Impact

In order to study the Application of high-speed on-off valve in the hydraulic cylinder speed control system, series and parallel application schemes between high-speed on-off valve and hydraulic cylinder are proposed to control the speed of hydraulic cylinder. The duty cycle of pulse control signal was changed according to the displacement of hydraulic cylinder to control the speed of hydraulic cylinder and weak the impact. The simulation curve compared with the experimental results show that, two application schemes can both control the speed of hydraulic cylinder effectively. Series application scheme can be only applied to small flow hydraulic system; parallel application scheme has wider application.

Research on Simulation of Electronic-Protection Circuit of Chopper Cascade Speed Control System

2014 ◽  
Vol 721 ◽  
pp. 569-574
Author(s):  
Zhao Yan Zhang ◽  
Xing Wu Wang ◽  
Yong Guang Ma
Keyword(s):  
Control System ◽  
Transient Process ◽  
High Voltage ◽  
Speed Control ◽  
Matlab Simulation ◽  
Power Failure ◽  
Speed Control System ◽  
Protection Circuit ◽  
Failure Conditions ◽  
The Impact

Firstly, according to the topology of conventional chopper cascade speed system to analyze the transient process of main loop during of contactor operation when device failure. Because the contactor action requires a longer time, Equipment is vulnerable to the impact of high voltage, high current during the contactor action, and cause damage to power electronic devices. For contactors drawbacks, the main circuit topology with electronic-protection circuit is designed. Then analyze transient process of chopper cascade speed control system with electronic-protection circuit under high-voltage power failure conditions. Finally, simulation model of chopper cascade speed control system with electronic-protection circuit is built respectively in Matlab. Simulation results show that electronic-protection circuits effectively solve the problem of high-voltage power failure under active inverter structure and inverter subversion.

Design of Direct-Control Hydraulic Cylinder Speed Control System Base on High-Speed On-Off Valve

2013 ◽  
Vol 273 ◽  
pp. 704-708
Author(s):  
Qin He Gao ◽  
Zhi Hao Liu ◽  
Ya Jun Shao ◽  
Ting Qiong Dong
Keyword(s):  
Control System ◽  
Duty Cycle ◽  
High Speed ◽  
Research Result ◽  
Speed Control ◽  
Hydraulic Cylinder ◽  
Pulse Control ◽  
Direct Control ◽  
Speed Control System ◽  
The Impact

Application of high-speed on-off valve in the hydraulic speed control system was researched in this paper. The direct-control circuit application of high speed on-off valve is proposed to control the speed of hydraulic cylinder. The duty cycle of pulse control signal was changed according to the displacement of hydraulic cylinder to control the speed and weak the impact. The speed and accelerated speed curves of hydraulic cylinder were achieved by the means of simulation with Simulink and experiment with FESTO is obtained, and research result shows that the applied scheme can effectively control the speed of hydraulic cylinder effectively.

Design and Development of DC Motor Speed Control System Based on ARM

2014 ◽  
Vol 926-930 ◽  
pp. 1239-1242 ◽  
Author(s):  
Dong Xiang Liu
Keyword(s):  
Motor Control ◽  
Control System ◽  
Speed Control ◽  
Dc Motor ◽  
Servo Motor ◽  
Motor Speed ◽  
Industrial Control ◽  
Dc Motors ◽  
Speed Control System ◽  
Interaction Interface

With the continuous development of embedded technology and its application in the field of industrial control and more and more people's attention, and play an important role. With ARM processors as controllers, including human-computer interaction interface, DC power unit and its driver modules, load and drive modules section. ARM controller by a/d sampling speed to get the error signal, and then after a certain algorithm, by d/a converter to control DC motors, so as to achieve the purpose of controlling the speed. In addition, ARM controllers can also be set through the d/a converter load to facilitate research of DC motor speed control system of static and dynamic characteristics in different load. Research and development of DC servo motor control system based on ARM core of DC servo motor control is a relatively new field, is one of the control of DC servo motor trend.

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