Research On Multi-stage Hydraulic Cylinder With Equal Thrust Based On Co-simulation

Machine tool manufacturers in our state basically import multi-stage hydraulic cylinderto produce large and high-precision CNC machine tools, which leads to that at least onemulti-stage cylinder to be installed for each high-end machine. In order to improve theequipment manufacturing level, it is necessary to improve the machining accuracy of CNCmachine tools, including improve the performance of multi-stage cylinder. The multi-stagehydraulic cylinder with equal thrust based designed in this paper is produced on the basis ofmulti-stage hydraulic, which is an innovation structure and can run more stable thanmulti-stage hydraulic cylinder theoretically. However, in order to reduce the risk of massproduction, it is necessary to use virtual prototype technology to do the research.In this paper, method of virtual prototype simulation is adopted to do the followingwork:(1)Using the co-simulation method, which mainly includes two parts—dynamicsimulation and control simulation. Dynamic modeling include that the model in ADAMSwhich modeled is truly transformed from Pro/E by use of seamless interface module. Controlmodel means that modeling the internal flow field of multi-stage hydraulic cylinder withequal thrust. Then realize the United Simulation by use of interface between ADAMS andMatlab/Simulink named ADAMS/Control.(2) Proposed two optimization program for the impact according to the simulationresults—the impact is too large when exchanges. Then, the two optimization programs aresimulated and the more reasonable solution is got according to simulation results.(3) The control system of multi-stage hydraulic cylinder with equal thrust is design basedon a reasonable program which can control flow in order to reduce impact when multi-levelthrust hydraulic cylinder exchanges.(4) The key process of physical prototype of multi-level thrust of the hydraulic cylinderis designed.From the above-mentioned work there is a conclusion—impact is an important factor inrestricting the performance of multi-stage hydraulic cylinder with equal thrust. In this paperregularly to reduce the oil flow when exchanges, which can reduce the impact, which canmake multi-stage hydraulic cylinder with equal thrust run more stable, all of which can berealized by software simulation.