| First, describes the research and development trends at home and abroad,analysis the propagation of stress wave in dual shock system based on theory of wavemechanics, discuss the efficiency of hydraulic breaking hammer under differentmedias, and do the simulation of the collision process of piston and rod based onANSYS, can well capture the stress wave transmission, lay the foundation for thestructural optimization of impact system.The dynamic simulation of hydraulic breaker was carried out based on ADAMS.in order to simulate the collision course of hydraulic breaker more realistically, twosoftware(ANSYS and ADAMS) are used jointly to establish flexible models of pistonand rod, and create a virtual prototype model of the mechanical system inADAMS/View eventually; in the paper, the hydraulic components which provided inADAMS/Hydraulic are used to establish the hydraulic system of hydraulic breaker,achieve the coupling of mechanical system and hydraulic system, and associatecontrol system and hydraulic system by building a sensor and a step function. Whenusing the virtual prototype model for parameter design, we only need to change theparameter settings correspondingly, avoided the trouble of amending the mathematicalmodel. Through simulation, the variation of the main parameters during themovement of hydraulic breaker, and studied the effect of parameters of majorhydraulic components on the work performance of hydraulic breaker, pointed out thesubstance and defects of traditional control method of hydraulic breaker, theproposition that the result of changing the opening time of the High-speed on/offvalve to change the impact energy of hydraulic breaker is equivalent tostress-feekback control was put forward for the first time. Illation have confirmed itsfeasibility. These results has guiding significance in improving the efficiency ofhydraulic breaker and achieving intelligent control better.Finally, the article also proposed a joint modeling of ADAMS and MATLAB, wecan use virtual prototype model from ADAMS in MATLAB, avoiding the complexityof building the model in MATLAB directly. Through the study of the feature that the piston will rebound when impact happens, the Fuzzy Controller which adopted thedeviation of rebound velocity and its rate of change as inputs, also the return time ofpiston and the pause time during each impact as outputs, and achieved the steplessand independent adjustment of impact energy and impact frequency. |
