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New type of high-temperature salt bath furnace control system
Author: XuYaZuo
Tutor: ZhangJing；ShenRuiHua
School: Hunan University
Course: Control Engineering
Keywords: Salt-bath stove Fuzzy control PID control Micro-Process Unit
CLC: TP273.4
Type: Master's thesis
Year: 2002
Downloads: 101
Quote: 3
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Abstract
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Today, salt-bath stove is still one of the main heating equipments in the heat-treating workshops. The salt-bath stove employs presently generally adopt the backward method of gearshift adjusting and segment heat controlling. These methods of controlling consume too much power. It also has other demerits such as low precision and much noise. The voltage is manually regulated by non-load machine switch, which is apt to be burnt. As a result, frequent fixing is inevitable; moreover, these methods of controlling cannot meet the needs of processing certain work pieces.In this paper, a transform approach is proposed for the salt-bath stove controlling system. In the approach, non-load machine switch is replaced by SCR controlled by MPU to regulate the temperature. This control precision is greatly improved, and at the same time parameters can be automatically stored and displayed during the manufacturing process, it also included some other auxiliary controlling functions, such as over-temperature alarm, work piece input or output reminding, etc.The fuzzy PID control algorithm consists of fuzzy control and digital PID adjustment. The fuzzy controller can adjust the parameter of PID controller on line. The combination of fuzzy control and PID control would achieve fine function. The result of simulation and experiment show that the reformed automatic control system can gain upon higher product quality, less power consumption, less fixing tune and expense, etc.
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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Fuzzy control, fuzzy control system
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