Closed loop control of excitation parameters for high speed switched-reluctance generators

2003 ◽  
Author(s):  
Y. Sozer ◽  
D.A. Torrey
Keyword(s):  
High Speed ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control ◽  
Switched Reluctance ◽  
Excitation Parameters

The Design of Monitoring System in Large Hydraulic Press Aiming at the Precise Closed-Loop Control

2014 ◽  
Vol 989-994 ◽  
pp. 3062-3069
Author(s):  
Heng Du ◽  
Bin Huang ◽  
Lin Wang ◽  
Shu Mei Chen
Keyword(s):  
Data Acquisition ◽  
Monitoring System ◽  
High Speed ◽  
Closed Loop ◽  
Hydraulic Press ◽  
Signal Acquisition ◽  
Closed Loop Control ◽  
Repeated Testing ◽  
Loop Control ◽  
The Status

In the research and development of the precise closed-loop control system in large hydraulic press, the touch screen and PLC are frequently applied to design, debug and test for the system. Though a better closed-loop control characteristic can be acquired after repeated testing by this way, the comprehensive state data of hydraulic press are unable to get, which leads to a long research cycle and also restricts the maintenance and upgrade with the equipment in the later period. In order to obtain the whole state information of hydraulic press easily and effectively, a monitor system of precise closed-loop control in large hydraulic press is designed. Based on reasonable cooperation of sensors and high-speed data-acquisition card, high-speed and precise signal acquisition is realized. In addition, data-acquisition software program is designed base on LabVIEW, it can achieve the functions of collecting, storing, displaying and analyzing data. Through the real measuring and analyzing on a certain large ceramic hydraulic press, the status of key parameters can be acquired effectively during the whole pressing process. So the monitoring system supplies the significant data basis to the precise closed-loop control, accelerates the design and development of high characteristic precise closed-loop control and also strongly supports to the maintenance and upgrade with the equipments in the later period.

Development of a digital control system for a belt-driven starter generator segmented switched reluctance motor for hybrid electric vehicles

2020 ◽  
Vol 234 (9) ◽  
pp. 975-984
Author(s):  
Long Chen ◽  
Haoxiang Wang ◽  
Xiaodong Sun ◽  
Yingfeng Cai ◽  
Ke Li ◽  
...  
Keyword(s):  
Control System ◽  
Digital Control ◽  
Closed Loop ◽  
Switched Reluctance Motor ◽  
Closed Loop Control ◽  
Digital Control System ◽  
Loop Control ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Starter Generator

A novel four-phase 16/10 belt-driven starter generator segmented switched reluctance motor has been proposed in a previous work to reduce torque ripple and increase the fault tolerance ability. Based on the previous research, the segmented switched reluctance motor digital control system is designed and presented. The digital control system including a power converter, detection circuits, and protection circuits is introduced in detail. For detection circuits, the half-detection method is employed to decrease the cost of the system. In addition, based on MicroAutoBox DS1401, a rapid control prototype platform is established. With this software system, it is easy to transfer control models and realize real-time control directly. Then, the speed closed closed-loop control for the segmented switched reluctance motor is applied to verify the proposed system. It contains current chopper control at a low speed and angle position control at a high speed. The simulation results are given, including the flux, current, torque, and efficiency range over the entire speed range of the segmented switched reluctance motor. Finally, the experimental results are presented to verify the simulation results and the effectiveness of the system. It can be found that the simulation and experimental results are consistent and acceptable, which means that the proposed digital system can operate naturally and accurately under speed closed loop control. Hence, the proposed digital system has high compatibility and practicability.

High Speed Weld Control System of Dual-Bypass MIG Based on LabVIEW

2010 ◽  
Vol 139-141 ◽  
pp. 1852-1855
Author(s):  
Cheng Xue ◽  
Yu Shi ◽  
Ding Fan ◽  
Hao Zhong ◽  
Ming Xiao Shi
Keyword(s):  
Control System ◽  
High Speed ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Mig Welding ◽  
Loop Control ◽  
Weld Formation ◽  
And Control ◽  
Control Output ◽  
Test Result

Dual-bypass MIG welding (DB-GMAW) is a new kind of high speed MIG welding with three arcs. In order to monitor the weld process and control it, a high speed weld system of DB-GMAW was built. The system was run by LabVIEW programs, including getting data of system and control output signals. The test result of system showed that all equipments could be used in the same time. Beside images of weld pool and arc, the weld voltages and currents of every part had been acquired. The signals of bypass current and weld speed also had been input TIG welding sources and worktable motor successfully. Meanwhile, the high speed weld formation had a good quality, and all of these established the closed-loop control of high speed DB-GMAW.

Development of a control architecture for a parallel three-axis robotic arm mechanism using CANopen communication protocol

2021 ◽  
pp. 1063293X2110019
Author(s):  
Fu-Shin Lee ◽  
Chen-I Lin ◽  
Zhi-Yu Chen ◽  
Ru-Xiao Yang
Keyword(s):  
High Speed ◽  
Closed Loop ◽  
Communication Protocol ◽  
Tracking Error ◽  
Robotic Arm ◽  
Control Architecture ◽  
Robot Kinematics ◽  
Closed Loop Control ◽  
Loop Control ◽  
Movable Platform

Based upon the CANopen communication protocol and the LabVIEW graphic programing procedures, this paper develops a closed-loop control architecture for a parallel three-axis (Delta) robotic arm mechanism. The accomplishments include prototyping a parallel three-axis robotic arm mechanism, assembling servomotors with associated encoders and gearsets, coding CANopen communication scripts for servomotor controllers and a host supervision GUI, coding forward/inverse kinematics scripts to compute the required servomotor rotations and the coordinates of a movable platform or the mechanism, coding tracking error compensation scripts for effective closed-loop griper control, and coding integration scripts to command and supervise the mechanism motion on the LabVIEW-based host GUI. During the development stage, this research designed and prototyped the parallel three-axis robotic arm mechanism based upon basic Delta robot kinematics. To control the mechanism effectively and accurately, this study implemented the CANopen communication protocol, which characterizes high speed and stable transmission. The protocol applies to the CANopen communication channels among the controllers and the host supervision GUI. On the LabVIEW development platform, the coded supervision GUI performs issuing/receiving messages to the CANopen-based controllers. The controllers excite the servomotors and actuate the parallel mechanism to track prescribed trajectories in a closed-loop control fashion. Meanwhile, an electromagnet attached to the movable platform of the robotic mechanism performs satisfactory picking/placing object actions.

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