Design of Smooth Ramp Feedrate for Machining Complex NURBS Paths

[摘要] The feedrate scheduling algorithms proposed in this work permit the complex NURBS tool paths to be traversed quickly in those areas not limited by dynamic constraints, but slowdown in critical areas just enough to keep the machine within its dynamic limits and the specified tolerance zone. Due to the typically improved path tracking performance, surface finish can improve greatly, reducing the need for secondary finishing operations such as polishing. This work implements the Acceleration Deceleration Before Interpolation (ADBI) approach which is desired in modern CNC controller design and high speed machining of complex micro profiles common in Aerospace applications.

[发布机构] Department of Mechanical Engineering, GMR Institute of Technology, Rajam, India^1;Department of Mechanical Engineering, National Institute of Engineering, Mysuru, India^2;Department of Mechanical Engineering, Karunya University, Coimbatore, India^3

[学科分类] 航空航天科学

[关键词] CNC controllers;Parametric NURBS;Real time workshop;Simulink;smooth ramp profile