【作者】 陈崇森；

【导师】 皮佑国；

【作者基本信息】 华南理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 数控技术和数控装备是制造工业现代化的重要基础,直接影响到一个国家的经济发展和综合国力,关系到一个国家的战略地位。数控机床由机床本体和数控伺服系统构成。伺服系统是以机械位移为直接控制目标的自动控制系统。数控机床进给伺服系统控制机床各坐标轴的切削进给运动,伺服系统执行来自CNC装置的运动指令。伺服驱动系统的性能在很大程度上决定了数控机床的性能。数控机床的最高移动速度,跟踪速度,定位精度等重要的指标都取决于伺服系统的动态和静态性能指标。本文在对永磁同步电机伺服驱动系统的总体设计框架进行简要介绍的基础上,重点对驱动装置的内部供电电源、伺服驱动装置的故障诊断以及伺服驱动装置的软件结构等关键技术进行了深入的研究和探讨,其主要内容为:分析了电流连续和电流断续两种工作模式下反激式开关电源的数学模型,设计制作了工作于电流连续模式的基于TOP244的8路反激开关电源的电路,该电源已经应用于实际驱动装置,测试和运行表明电源满足设计要求。简要介绍了工作于电流断续模式的基于M51995的8路反激开关电源的设计。故障诊断保护功能为伺服驱动系统的安全运行和工作人员的人身安全提供了有力保障,而面板参数输入等辅助功能进一步提高驱动器的智能水平。对伺服驱动系统的常见故障进行分析并归类,整理出故障处理事项,构思每一事项实现的软硬件设计,详细叙述了各事项的具体实现方法及在DSP或FPGA上的编程。通过基于状态机的VHDL编程实现面板参数输入,并实现参数的DSP自动存储。通过TMS320F2812的SCI模块实现与上位机的串行通讯。伺服驱动器除了要实现三闭环控制等任务外,还需具备参数输入,故障诊断保护,RS232/485通讯,CAN总线通讯等功能,要求TMS320F2812有多任务实时处理的能力,通过移植μC/OS-II实时内核,合理设计各运行任务,使整体软件设计结构清晰,可靠性和可扩展性增强,提高了程序开发的效率。更多还原

【Abstract】 Numerical Control (NC) technology and NC equipment are important foundation for Manufacturing Industry Modernization and make a direct impact on country economic development and overall national strength. They are related to country strategic position. NC machine tools are composed of the machine tool body and NC servo system. Servo system is an automatic control system which aims at mechanical displacement control directly. NC machine tool servo system control the cutting movement of each coordinate shaft and the servo system implements the movement instructions from the CNC device. The servo-driven system performance determines the performance of NC machine tools to a great extent. The maximum speed, track speed, positioning accuracy, and other important indicators of NC machine tools depend on the dynamic and static characteristics of servo system.In this paper, the schema of permanent magnet synchronous motor (PMSM) servo-driven system is introduced briefly. Based on above, the key technologies of internal power supply, fault diagnosis and software structure of servo drive are studyed and explored in-depth. Its main contents are:The flyback switching power supply mathematical model is analyzed in continuous current mode (CCM) and discontinuous conduction mode (DCM). 8-output flyback switching power supply based on TOP244 which works in continuous current mode is designed. The power has been used in the drives actually. The testing and operation of this power show that it meets the design requirements. At the same time, the design of 8-output flyback switching power supply based on M51995 which works in discontinuous current mode is introduced briefly.The fault diagnosis and protection provided a strong guarantee for the safe operation of servo drive system and the personal safety of staff, and the parameters input function by panel with other auxiliary functions further improves the intelligence of this driver. The common faults of Servo drive system are analyzed and classified. Faults handling matters are sorted out and the hardware and software designs are conceived for each handling matter. The specific implementation methods of fault handling matters and programs on FPGA or DSP are illustrated in detail. The parameters input function by panel is implemented by VHDL programming based on state machine and the values of parameters are stored automatically on DSP. The serial communication between servo driver and PC is implemented by SCI module of TMS320F2812.In addition to dealing with three closed-loop control tasks, the servo driver need to handle parameters input, fault diagnosis and protection, RS232/485 communications, CAN bus communications and other functions. It requires that TMS320F2812 has multitask real-time processing capability. Through the transplantation ofμC / OS-II real-time kernel on TMS320F2812, the running tasks are designed properly so that the overall software structure design is clear and its reliability and expansibility are enhanced. It will improve the efficiency of programming development.更多还原