Design of Feed Drives with Object-Oriented Behavior Models

Abstract

Feed drives are designed with manual calculations, custom spreadsheets or with special sizing software. Manual calculations and spreadsheets are based on simplified calculations and are generally timeconsuming. Software packages for sizing servo systems provide effective means for many standard applications, but also have several limitations: they do not allow application-specific extensions, detailed analysis of control loops dynamics in the time and frequency domain is not possible, and they therefore cannot be used for optimizing the system as a whole. In this paper an alternative approach for sizing servo systems is presented that enables analysis and optimization of the system dynamics. The approach relies on objectorientated behavior models. These models are included in an extensible model library that facilitates quick model development even with limited expert-knowledge in simulation. For supporting the determination of parameters and components the simulation-framework is combined with methods that allow optimization of discrete and continuous parameters.

Multi-domain integrated modeling and verification for the ball screw feed system in machine tools

“…Some attempts have been made to use the non-causal modeling method based on Modelica to establish the model of the feed system, but the model was not strictly in accordance with the actual system and the model was not validated by experiment. 20,21…”

“…Some attempts have been made to use the non-causal modeling method based on Modelica to establish the model of the feed system, but the model was not strictly in accordance with the actual system and the model was not validated by experiment. 20,21 In view of the multi-domain coupling characteristics of feed drive systems and the shortcomings of the traditional modeling method, this article proposed the non-causal modeling method based on Modelica language to strictly model each subsystem of ball screw feed system. And then the seamless modeling of multi-domain integration of the feed drive system is realized by the connection of each subsystem.…”

Hybrid Multi-Domain Analytical and Data-Driven Modeling for Feed Systems in Machine Tools

“…In the references, the multi-domain coupling characteristics of a feed system were taken into account, but the modeling efficiency was low and it was hard to achieve real seamless integration due to use of the modeling method based on signal flow. Some attempts have been made to use the non-causal modeling method based on Modelica to establish the model of feed system, but the model was not strictly in accordance with the actual system and the model was not validated by experiment [29][30][31]. The deficiencies of existing research into integrated modeling of a feed system are that the parameters of the integrated model are too many, so they are difficult to determine accurately, meaning the accuracy of the model is limited.…”

Towards the integration of thermal physics and geometrical constraints for a 3D-multiphysical sketcher

“…The language used for this step is Modelica [13], [14]. In fact, the libraries developed using Modelica already contain objects and models aimed to simulate different physics, including related equations, and the existing connectors could be used to connect devices by means of compatible parameters [15], [16].…”