基于DSP的衍生式非圆车削数控系统设计

Design of a DSP based derived CNC system for noncircular turning

为使传统数控车床具备车削非圆截面零件的功能,根据衍生式数控系统的原理,采用一直线电机伺服单元为衍生模块,以TMS320F2812DSP为衍生模块的控制核心,设计了衍生式非圆车削数控系统。实验结果表明:该系统能对衍生模块直线电机进行高速伺服控制和U轴跟踪控制,分辨率<0.5μm。新系统充分利用了原有数控系统,结构简单、目标明确、价格便宜、性能稳定。改造后的车床既能车削各种活塞、靠模等非圆截面零件,又具有通用数控车削的功能。

in order to obtain noncircular turning function for a traditional CNC system, a derived CNC system was designed based on the principle of a derived CNC. The derived block is a linear motor servo unit in which a TMS320F2812DSP is used as a control core of the derived block. The results show that the derived block can fulfill the needs of high speed servo control of a linear motor and tracking control of a U axis. The resolution of the system can reach 0,5 μm. The new derived CNC system has a simple structure, definite goal and good stability. It can machine parts with noncircular section, like pistons, and has also turning function of a common CNC system.