| With domestic demand for medium and large telescopic cranes is increasing, the telescopic boom with single-cylinder pin, as one of the key technologies has been paid more and more attention. The telescopic boom with single-cylinder pin controls each boom back and forth by a single cylinder. The intelligent control of the telescopic boom is implemented by mechanical-electro-hydraulic-communication integration technology.In this paper, the simulated example is based on the project of QY80 telescopic boom crane designed by Dalian University of Technology and Fotonloxa Crane Institute. Focus of this paper is the modeling and simulation of hydraulic about the telescopic boom with single-cylinder pin, aimed at studying the design of electrical and hydraulic about the control system, identifying the factors which affect the control system. Then a control algorithm is added to eliminate the errors. Finally motion control of the entire system is programmed by the software.The main study of this paper is summarized as follows.(1) The main types of telescopic mechanism of home and abroad is summarized and their working principle, the advantages and disadvantages are analyzed. The control and design principle are researched for the chosen type.(2) Electric and hydraulic control systems are designed in the paper. The main components are selected based on QY80 telescopic boom crane.(3) Hydraulic control circuit system of telescopic action is designed and Electro-hydraulic proportional system for theoretical is modeled and stability analyzed.(4) The hydraulic system of cylinder and boom bolt are modeled and simulated in AMESim. According to the simulation system, the factors which influence stability and fast response of system are identified.(5) An intelligent control algorithm - fuzzy PID control algorithm is selected for the control system, Co-simulation of the telescoping system is researched and the results are analyzed in AMESim/Simulink.(6) The flow chart of electrical control system is designed according to the research of telescopic control theory and programmed by software CoDeSys to control the boom’s automatic and manual movement. Finally it is analyzed in simulation.Based on the simulation of cylinder and boom bolt’s hydraulic system, some factors that influence on the hydraulic system are identified. Meanwhile telescopic hydraulic simulation model of telescopic system is designed and fuzzy PID control algorithm is selected for the control system. Co-simulation of the telescoping system was researched to achieve the improved and enhanced system in AMESim/Simulink. This paper will play a supporting role in future design. |
PDF Full Text Request