Computer vision applied in the precision control system

2002 ◽  
Vol 15 (01) ◽  
pp. 87
Author(s):  
Qingying Zhang
Keyword(s):  
Computer Vision ◽  
Control System ◽  
Precision Control

Experimental Demonstration of Precision Control of a Deployable Optics Structure

2002 ◽  
Vol 124 (3) ◽  
pp. 441-450 ◽  
Author(s):  
R. Scott Erwin ◽  
Karl Schrader ◽  
Ruth L. Moser ◽  
Steven F. Griffin
Keyword(s):  
Control System ◽  
Structural Control ◽  
Level Control ◽  
Precision Control ◽  
Research Issues ◽  
Optical Surfaces ◽  
Point Tracking ◽  
High Bandwidth ◽  
And Performance ◽  
System 1

This paper presents the development, design, and implementation of a precision control system for a large, sparse-aperture space-deployable telescope testbed. Aspects of the testbed and laboratory environment relevant to nanometer-level control and performance objectives are provided. There are four main objectives of the control system: 1) reduction of natural resonances of the supporting structure, 2) rejection of tonal disturbances, 3) tip, tilt, and piston set-point tracking for optical surfaces, and 4) reduction in settling time of optical surfaces after an impulsive slew-type disturbance. The development of a three-input, three-output, high-bandwidth structural control system for the testbed is presented, and experimental data demonstrating that all objectives were attained is provided. The paper concludes with a discussion of the results and a description of research issues remaining to be addressed.

A Spool Displacement Control System of Proportional Valve Based on Digital Observer

2010 ◽  
Vol 455 ◽  
pp. 110-115 ◽  
Author(s):  
Xiang Bing Kong ◽  
H.Y. Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Kinetic Energy ◽  
Feedback Control System ◽  
Displacement Control ◽  
Precision Control ◽  
Proportional Valve ◽  
Small Flow ◽  
The Mathematical Model ◽  
Control Accuracy

To solve the problems that general proportional valve can’t meet the requirements of high precision control, the paper describes the generation mechanism of kinetic energy in the accurate spool displacement control system of the small flow rate proportional valve. The mechanism of kinetic energy and displacement control of spool under disturbance are discussed quantitatively. Based on DSP and the mathematical model established, the digital state observer feedback control system is designed. The experiment shows that the system can restrain disturbance effectively, and the control accuracy of spool displacement is high, which is up to the level of 5μm.

Precision Control Research on DACS-Based Modern Digital Shipbuilding Technology

2010 ◽  
Vol 142 ◽  
pp. 72-76
Author(s):  
G.X. Liu
Keyword(s):  
Control System ◽  
Digital Control ◽  
Control Technology ◽  
Precision Control ◽  
Shipbuilding Industry ◽  
Control Equipment ◽  
Control Research ◽  
Long Time

At present the developed shipbuilding in Japan and Korea, has entered the era of precision control shipbuilding, our country's shipbuilding industry is during the transition from the margin shipbuilding to no margin, and try hard to achieve precision shipbuilding, but it needs a very long time. One of way to achieve target is the full use of modern digital precision control equipment and software of shipbuilding. The paper is based on DACS precision control system, and deeply analysis of modern digital control technology shipbuilding is given.

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