The Research Of Embeded Motion Control System Based On PC/104

Manufacturing is the foundation of industry in a country, manufacturing technology is the technology backbone of manufacturing, and whether the level of manufacturing is high or low is the important index which estimates the developing level of the country's industry. The manufacturing, which is represented by the traditional machining electron industry, is coming through a profound revolution. In the revolution, developing advanced manufacturing technology energetically has been one of several strategies of the most important technology in most countries. What's more, advanced manufacturing technology has been an important method in international competition and production renovation. The Numerical Control (NC) technology is the technology that control machin motion and operating process with digital information, is the base of advanced manufacturing technology, is the most basic equipment of developing high-technology industry and top industry and is the important base of manufacture modernization whether is solid or not will influence the national economic development and comprehensive national strength and influence the strategic position of country.Motion Controller (MC) is a control device that regards its central logic unit as the core, sensor as the sensitive component, and electromotor or executive unit as the controlled object. MC is very important in the ONCS, because it is the most important to control the movement of the motor of each axis in the NC system and the precision of position control and performance of velocity adjusting are directlyrelated to MC. In the present, all of the researches of ONCS focus on that of the PC-based NC control device, whose key is the research of Motion Control Board (MCB) which is used to control stepping or servo motor. To PC-NC, in some degree, the performance of MCB decides that of the whole NC system, further more, the development and application of technology of macroelectronics and Digital Signal Processing continuously improve the performance of MCB and greatly increase the level of integration and dependability.During the research, through the overall survey of ONCS and deep study of Motion Control Technology (MCT), facing the behindhand actuality of research of domestic MCT, to meet the practical requirements of the laser carving field, following the developing trend of the present MCT, drawing on the new production of the present ONCS and relating MCT, bringing forward the solution based on PC/104 and FPGA, we have developed a four-axis multifunctional MCB which is very original, powerful and flexible.In the paper, there are the following major contents:Firstly, through the overall survey of ONCS, embedded system and MCB, and deep study of MCT, after comparing the common solutions of motion control, we brought forward the solution of motion control based on PC/104 and FPGA, and made out the whole design solution of board.Secondly, according to the whole design solution, we figured out the whole architecture of board, and plotted out and implemented the respective function of CPLD and FPGA in detail. Further more, we designed digital input/output circuit according to the principle of photoelectricity isolation, four-channel analog output circuit by the priciple of DAC and put forward effective anti-jamming measures in allusion to common jamming phenomena.Thirdly, in allusion to some prcatical problems in the motion control, such as high speed, high precision, motion stabilization, real-time control and muti-axis contouring control, etc, we designed a four-axis MCB in the FPGA. We defined the functions of all of the registers in detail, designed perfect Acceleration/ DecelerationControl Circuit, Variable Frequency Divider Circuit, Multiplication Factor Frequency Divider Circuit and three different counter circuits, achieved special functions of the S-curve Acceleration/ Deceleration Control, Ramping-down Point Counter & Calculation Circuit and A/B encoder multi-frequency circuit, etc.Finally, we made out the test of board and came true the application of full-digital measure on the board. The motion control board met anticipative demand according to the result of test and application.