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Multi-domain Modeling And Simulation Of High-speed And High-precision Dual-drive Feed System Based On Modelica

Posted on:2024-01-29Degree:MasterType:Thesis
Country:ChinaCandidate:C Q WangFull Text:PDF
GTID:2531307103967899Subject:Mechanical engineering
Abstract/Summary:PDF Full Text Request
With the continuous progress of the current machining industry,the CNC machine industry has higher requirements for speed and accuracy.As the feed system of the core transmission component of the machine tool,how to improve the control accuracy of the feed system is particularly important for the processing performance of the machine tool.Different from the traditional experimental improvement method,modeling and simulation technology is a feasible research method with high efficiency and low cost.At present,the modeling of feed systems is mostly limited to a single domain,and the coupling relationship between different domains is ignored,and the modeling of multi-domain comprehensive systems is rarely studied.Therefore,this paper conducts a comprehensive modeling and simulation research on high-speed and high-precision feed systems from the perspective of multiple fields,and discusses the establishment of multi-domain joint simulation models and the realization of high-precision synchronous control strategies.The main research contents include:1.The structure and working principle of the dual drive feed system are studied in detail,and based on the modular modeling method of Modelica modeling language,the feed system is decomposed into modules according to different types of fields.2.Based on the model divided by domain of the feed system,the Mworks unified modeling and simulation platform is used to build subsystem models in different fields.Finally,based on the coupling characteristics of multi-domain interfaces,the general model of co-simulation of the input and output system is built by the subsystem models of different domains.3.In order to verify the total simulation model,the simulation parameters were input into the total simulation model of the feed system.Firstly,the positioning characteristics and temperature rise characteristics of the feed system were studied based on Mworks platform.Then the influence of internal and external factors on synchronous error of dual drive feed system is analyzed.4.In terms of servo control of dual-drive feed system,it is aimed at the problems of difficult tuning of traditional PID three-ring control parameters and large synchronization error during dual-drive feed movement.Based on the cross-coupling control strategy,a fuzzy adaptive PID cross-coupling control method is proposed,and the feasibility of the control method is verified by comparing it with the traditional PID cross-coupling control simulation.
Keywords/Search Tags:Dual drive feed system, Multi-domain modeling, Modelica language, Fuzzy PID control
PDF Full Text Request
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