Multi-Axis Control System Development Of Radome Electrical Thickness Measuring Equipment

Electrical thickness error of missile radome is one of the main factors that have great influence in the precision control and guide. One of the most effective ways is compensating electrical thickness error through precision-grind to adjust geometry thickness. So it is crucial that measuring electrical thickness exactly in order to realize precision compensating electrical thickness error. But because of the high measure precision and complex measure process, there have no ripe measure technology and equipment. This paper studies and develops multi-axis numerical control system of electrical thickness measure equipment for certain type missile.According to performance requirement of equipment, adopt "IPC + motion controller" to make up one open numerical contro system. This system has steady function and can realize long-distance control. Universal PMAC Lite that is one kind of Multi-axis control is used to realize the three axes gang control of four coordinates in measurement instrument. PAMC provides double port RAM to realize speediness communication between the IPC and motion controller. In order to ensure the exiting process safely when electricity is broken off abnormally, absolute encoder is used as the detection equipment. It provides security and precision safeguard for entire measuring process. The kernel part of this numerical control system is the interface technology between PMAC and absolute encoder. This paper makes a particular explain.The system makes use of VC++6.0 as the development environment to finish the software design. Not only compile user interface, measuring mode interface, parameters input interface, measure programming created automatically, but also through Pcomm32.dll, finish the communication between IPC and PMAC and display measure result and machine tool running status real time. The real time control module is used to control servo, to realize the variable initialization of PMAC through PEWIN software. Also the module designs and compiles PLC programs that are used to control the equipment logically and motion program that interprets G code.Through testing, the numerical control system realizes precision motion control, and satisfies the requirement of measuring electrical thickness, and reaches expected purpose.