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随着航空航天制造业的发展,中小批量生产已成为生产单位的作业模式,它希望市场能够提供不同加工工况下的数控系统,要求迅速、高速、低成本的构筑面向用户的控制系统,并能大幅度地降低维护和培训的成本,同时还要求新一代数控系统具有方便的网络功能,以适应生产型单位面向任务和定单的生产组织和管理模式。随着计算机的飞速发展,各种开放式的数控系统应运而生,因而对数控机床的稳定性、柔性、通用性提出了更高的要求。在生产加工中,当数控系统发出位置指令后,由于机械部分不能很快响应而产生滞后现象,影响了加工精度,虽然控制理论中有各种算法能够实现高速和高精度的伺服控制,但是由于计算方法复杂,计算机运算速度不够,即使采用专用芯片的方法,也无法根除滞后现象的发生,只能尽量减少滞后量,提高跟随精度。因而要提高数控系统的可靠性,保证加工产品的
With the development of the aerospace manufacturing industry, small and medium batch production has become a mode of operation for production units. It hopes the market will be able to provide CNC systems under different processing conditions and demand prompt, high-speed and low-cost construction of user-oriented control systems. Can significantly reduce the cost of maintenance and training, but also requires a new generation of CNC system with convenient network capabilities to meet the production unit for the task and order-oriented production organization and management model. With the rapid development of computer, a variety of open CNC system came into being, so the stability, flexibility and versatility of CNC machine tool put forward higher requirements. In the production and processing, when the numerical control system sends out the position instruction, because the mechanical part can not respond quickly and produces the hysteresis, has affected the processing precision. Although there are various algorithms in the control theory to realize high-speed and high-precision servo control, The calculation method is complex, and the calculation speed of the computer is not enough. Even if a dedicated chip is used, the hysteresis can not be eradicated. Only the hysteresis can be reduced as much as possible and the following accuracy can be improved. Therefore, to improve the reliability of CNC system to ensure the processing of products