Servo motor with servo motor is widely used in industry, high dynamic function of the servo drive and servo motor planning and research will become a hotspot in the research of the domestic, together, how to progress dynamic characteristic of the servo motor, also has become a problem with urgent. Servo system in the process of dynamic control function index called dynamic function index, such as the overshoot volume, followed the speed, precision, and regulate time, anti-interference ability, etc. Servo system was first used in military, aerospace, along with the pace of industrialization, gradually into the category of industrial and civilian category, in production practice, the servo system has been widely used. 1, in the numerical control machine tool, choose high-end permanent magnet servo instead of asynchronous communication variable frequency drive seems to have become standard. Since the 90 s, Europe and the United States to develop using high-speed CNC machine tool, in the case of the same resolution, the workbench's feed speed, which is to improve greatly. The modern machine tool numerical control system is more outstanding high speed, high accuracy, high dynamic, high rigidity characteristics. We now see the use of domestic servo on economical numerical control machine tool, but in the domestic advanced machine servo is still can not meet the requirement, function is an important aspect, stability and the brand effect is also a short period of time can't across the barriers. 2, a robot servo system is to use more categories, industrial robots with multiple degrees of freedom, and therefore less per the demand of the industrial robot servo motor is 3 -More than four units, more than 10 sets. Now with the amount of the industrial robot now exceeds 1 million sets, and each year is still in the demand for increased significantly. International industrial robots giant mostly have their own server, in recent years also have domestic servo manufacturers began into the robotics industry, although the function there are still quite a distance. 3, servo using share of textile industry is very low, to improve the production efficiency, part of the textile machinery started using advanced servo technology, price factors lead to servo system not widely used in textile industry. If domestic servo on price advantage together, progress product function, will greatly promote the development of the industry. In addition, printing machinery, packaging machinery, medical equipment, metallurgical machinery, automated assembly line and so on all have a great demand of bar system. It also can see the progress the function of the servo system is about the importance of industry development.
