摘要
为优化进给速度曲线,节约加工时间并提高加工质量,提出一种通用的前瞻速度规划算法。该算法可以在满足进给速度约束条件的前提下,对加工路径进行预读,实现进给速度的前瞻规划处理。算法以规划元为单位对加工路径进行划分,通过对加减速算法的抽象和封装实现不同种类的前瞻速度规划,以及对进给速度控制功能算法的重构。仿真和实验表明,该算法在几种不同加减速方式下都可以正确重构,实现进给速度的实时前瞻规划,改善数控机床的加工效率和运动平稳性。
The feedrate planning is a key function in Computerized Numerical Control （CNC） controller. In the high speed and high precision machining process, the look-ahead feedrate planning algorithm was essential for optimizing the feedrate curve, saving machining time and improving machining quality. Therefore, a generalized look-ahead fee- drate planning algorithm was proposed. On the premise of satisfying the constraints of feedrate, this algorithm could preread tool path and realize look-ahead feedrate planning. The planning units were used to divide the tool path, and different kinds of look-ahead feedrate planning were realized by abstracting and encapsulating the acceleration/decel- eration algorithm. Thus the reconfiguration for feedrate＇s control algorithm was realized. The simulation and experi- ment results showed that the proposed algorithm was correctly reconfigured with different acceleration/deceleration schemes. The real-time look-ahead planning for feedrate was realized, and the machining efficiency and motion smoothness of CNC was improved.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2013年第3期529-539,共11页
Computer Integrated Manufacturing Systems
基金
国家自然科学基金资助项目(50975193)
天津市科技计划资助项目(10ZXCXGX28700
11ZCKFGX03400)
天津大学自主创新基金资助项目(60302046)
天津市应用基础与前沿技术研究计划资助项目(12JCQNJC02500)~~
关键词
数控系统
进给速度
前瞻规划
重构
加减速
numerical control system
feedrate
look-ahead planning
reconfiguration
acceleration/deceleration
