Multi-domain Modeling Research For High Speed Feed System Of Machine Center

With the high speed, high precision, high efficiency requirement of modern machineryprocessing industry, all walks of life require higher performance of machine tool feedsystem. Compared with traditional experimental methods, simulation technology is the highefficiency and low cost method for system performance research. Machine tool is anorganic whole composed of mechanical, electrical, thermal, control, and other differentfields, the high precision and high credibility of system performance simulation is reflectedin the coupling relationship of multi-domain system. The modeling researches of feedsystem are currently limited in single field, electromechanical coupling, heat mechanicalcoupling etc., but few to multi-domain system-wide modeling and simulation, so it isdifficult to consider the different fields coupling in all, which restricts the credibility of thesystem simulation further improved. With computer simulation technology matured, themulti-domain simulation technology is constantly evolving, especially the multi-domainmodeling method based on Modelica. This method has widely used in complex systemmodeling such as aircraft, satellites because of its modeling convenience, high model reuseand other good characteristics. The article attempts to focus on the multi-domain couplingmodeling and simulation method of machine tool feed system to start exploring theestablishment of horizontal machining centers HMC80multi-domain coupling model basedon unified modeling language Modelica to improve the modeling efficiency of the unifiedmodel and simulation accuracy. Specific works are as follows:Based on the advantages of modular modeling concept, the method of multi-domainmodule division with the multi-domain modeling based on Modelica to feed system isproposed, the modeling and simulation process is designed.According to the module division, based on the multi-domain mathematical models ofmechanical, electrical, control and heat transfer parts, the sub-modules of subsystems in allareas is established in the unified simulation platform, and the multi-domain interfaces isalso set up. Initially, the multi-domain model library development of feed system is realized.The unified multi-domain simulation model of feed system is assembled into by callingthe library, and then an experimental test platform is built. The feasibility and effectiveness of feed system library are verified by compared the simulation results of the positioning andtemperature characteristics of feed system with the experimental results.In summary, the multi-domain modeling method based on Modelica can solve themulti-domain coupling of the feed system to achieve a seamless integration and dataexchange among different fields, which provide the effective modeling way for themulti-domain coupling system performance simulation. Meanwhile, the multi-domainmodeling for feed system provide a theoretical basis for the modeling of the wholemachining center, and there is a certain engineering significance.