[ieee 2008 7th world congress on intelligent control and automation - chongqing, china...
TRANSCRIPT
High Precision Pressure Control System of Cubic Press Based on ARM
Shaojia He1,2, Jinhai Mo2, Shouqi Wei2, Dao Huang1 1) State Research Center of Industrial Automation, East China University of Science and Technology, Shanghai 200237
(E-mail: [email protected]) 2) School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004
(E-mail: [email protected]) Abstract—High control precision of pressure is one of the most important factor to guarantee the quality and quantity of synthetic
diamond. But the pressure control system of cubic press in common use has the disadvantages of large zero drift, poor repeatability, and low control precision. To handle these problems, a novel pressure control system of cubic press has been developed. In this system, a
cost-effective microprocessor ARM7TDMI (S3C44B0X) was employed, and an appropriate temperature compensation circuit was designed to reduce the negative influence of large environment temperature variation. The pressure boosting speed and pressure control
precision were improved by three motors coordinated control. An efficient method was adopted to overcome the problems of large zero drift and poor repeatability by software. Furthermore, several measures were utilized to prevent the malfunction of system. Application
results indicate that this control system has the advantages of low zero drift, high precision, good repeatability and reliability.
Keywords—cubic press, synthetic diamond, ARM, pressure control
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978-1-4244-2114-5/08/$25.00 © 2008 IEEE. 7417
Proceedings of the 7thWorld Congress on Intelligent Control and Automation
June 25 - 27, 2008, Chongqing, China
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