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이재천(J. C. Lee),고재욱(J. U. Koh),권태황(T. H. Kwon),신행봉(H. B. Shin),손정훈(J. H. Son) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.10
This research aims at static characteristics control of a proportional electronic control valve with the configuration of RCP system using a digital amplifier·controller. The goal of the study is to reduce hysteresis through configuration of a digital closed-feedback system from the existing analog open-system, and to compact the digital amplifier·controller. 8-bit for development is selected for controlling a proportional valve and the related circuit is designed. The designed amplifier is combined with valve, hydraulic oil pump, and PC to configurate RCP system. The PID controller is used for control algorithm within MCU. Especially, the problem of unstable flow-output, which is found during the static characteristics control test, is solved by tuning duty ratio of PWM. Finally, the amplifier, which is developed by our research team, is used to test and compare the valves produced by the two companies, Rexroth and SG Sevo, and to get the results of the two companies" static characteristics control performance test.