plc外文文献.doc

Development of PLC-based Tension Control System REN Sheng-le*, LU Hua, WANG Yong-zhang, FU Hong-ya Department of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, China Received 22 May 2006; accepted 22 November 2006 Abstract Fiber winding tension is an important factor in the molding techniques posite material which influences the quality of winding product directly, and the tension control isa key technique in fiber winding techniques. This paper introduces a closed-loop tension control system with the programmable logic controller (PLC) with function modules as its control kernel, the alternating current (AC) servo motor as execute element and the radius-following device to plish the real-time pensation. The mechanism of the tension control system is analyzed and the numerical model is set up. pensation technique of the radius of the scroll is analyzed. Experimental results show that the system is well qualified with high control precision and high reaction speed. *ponents posite material fiber winding possess such advantages as low weight, high strength, and high corrosion resistance, and they are widely applied in aviation and aerospace industry. Many researches have shown that improper or unstable tension leads toa strength loss of 20%-30% of the fiber ponents. An ideal tension control system should provide stable and adjustable tension during the win