Computer Assisted Selection of Servomotor Driving System for Linear Motion NC Axis Experimental Stand

Abstract

The paper presents the works performed by the authors in the field of structural and functional optimization numerically controlled (NC) axes. The study includes two computing applications developed by second author of the paper in a PhD thesis related on NC axes’ structural and functional optimization. The first computing application is used for calculating the total reflected inertia of a linear motion NC axis (total inertial loads' reducing on the driving motor's shaft level). The second computing application is used for both preliminary selection of the driving servomotor (by checking first the accomplishment of the kinematic criterion) and a secondary selection of the electric motor (by checking in a second stage the accomplishment of the static and dynamic criterion). By mean of both software applications optimal matching of servomotor driving system with available NC axis mechanical structure may be determined. The analyzed linear motion NC axis is part of an experimental stand (existing in the MMS department from EMTS faculty), that supplementary to the driving servomotor, includes a belt drive transmission, a ball screw - bearings assembly and a driven element guided by ball rail system.

Виробництво Тонкостінних Деталей Літальних Апаратів На Обладнанні З Чпк

“…Для цього використовуються відповідні датчики та автоматичні методи контролю. Cерводвигуни є допоміжними приводами, розробленими для верстатів [81,124]. Серводвигуни можна розділити на синхронні та асинхронні [5].…”

Experimental Research to Evaluate Thermal Behavior of a Brushless Driving Servomotor for Linear Motion NC Axis Experimental Stand

“…This study is part of the experimental research carried out in order to complete the PhD thesis [1] titled "Research on structural and functional optimization of numerically controlled axes of IR in order to increase their performance," and the results have been used for theoretical contributions validation. In paper [2] and [3] were presented the first and the second part of the research works, including theoretical contributions developed in PhD thesis. Paper [2] had shown two EXCEL computing applications used for calculating the total reflected inertia of a linear motion NC axis (corresponding to an experimental bench existing in the MMS department from EMTS faculty), and for, both, preliminary selection of the NC axis driving servomotor (by checking first the accomplishment of the kinematic criterion) and secondary selection of the electric motor (by checking in a second stage the accomplishment of the static and dynamic criterion).…”

“…In paper [2] and [3] were presented the first and the second part of the research works, including theoretical contributions developed in PhD thesis. Paper [2] had shown two EXCEL computing applications used for calculating the total reflected inertia of a linear motion NC axis (corresponding to an experimental bench existing in the MMS department from EMTS faculty), and for, both, preliminary selection of the NC axis driving servomotor (by checking first the accomplishment of the kinematic criterion) and secondary selection of the electric motor (by checking in a second stage the accomplishment of the static and dynamic criterion). In paper [3] were presented the second part of theoretical contributions (including too a MathCAD application) developed in order to evaluate servomotor's thermal energy dissipation and maximum operating temperature evaluation, that allows to perform the assisted final checking and optimum selection of the electrical driving servomotors.…”

“…In paper [3] were presented the second part of theoretical contributions (including too a MathCAD application) developed in order to evaluate servomotor's thermal energy dissipation and maximum operating temperature evaluation, that allows to perform the assisted final checking and optimum selection of the electrical driving servomotors. At these two, previously presented stages of theoretical research [2], [3], was added a third stage of applicative research, dedicated to get a first cross validation of above mentioned mathematical models through comparison by results obtained from an assisted modeling and simulation process, by mean a comprehensive motion-application sizing tool used for analysis, optimization, selection and validation of electrical servo driving systems: "Motion Analyzer", Allen-Bradley -Rockwell Automation [1]. To complete all above mentioned theoretical and applicative researches, present paper finally presents the experimental research stage performed in order to validate, both, the mathematical models presented in papers [2] and [3] as well as the results obtained from assisted modeling by means of the dedicated software application [1] through specific experimental measurements.…”

“…At these two, previously presented stages of theoretical research [2], [3], was added a third stage of applicative research, dedicated to get a first cross validation of above mentioned mathematical models through comparison by results obtained from an assisted modeling and simulation process, by mean a comprehensive motion-application sizing tool used for analysis, optimization, selection and validation of electrical servo driving systems: "Motion Analyzer", Allen-Bradley -Rockwell Automation [1]. To complete all above mentioned theoretical and applicative researches, present paper finally presents the experimental research stage performed in order to validate, both, the mathematical models presented in papers [2] and [3] as well as the results obtained from assisted modeling by means of the dedicated software application [1] through specific experimental measurements. However, experimental data presented in actual paper includes only validation of mathematical models for electric motor's preliminary selection and checking, (performed by determining the total reflected inertia of the mechanical system on motor shaft level) as well as the mathematical models for final selection and checking (by evaluating the servomotor's thermal energy dissipation, and servomotor's internal and external maximum operating temperature) already included in papers [2] and [3].…”