【作者】 李彬；

【导师】 吴爱国；

【作者基本信息】 天津大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 随着控制技术和计算机科学的快速发展,工业控制器和工业控制软件呈现出了智能化、信息化、通用性和开放性的发展趋势。传统的控制器软件或存在着灵活性差、开发周期长、功能单一等缺点,或成本较高、难以普及;针对目前流行的ARM处理器和控制器PC化的发展趋势,本文提出并设计了一种可组态、多算法、网络化、灵活度高的底层控制器软件,以适应不同的场合与应用。该软件基于ARM9处理器和嵌入式Linux操作系统,将前者的高性能和后者提供的网络通讯、进程调度等功能充分发挥了出来。该控制器软件基于一种纵向分层和横向分块的正交化软件结构,分设备抽象层、嵌入式操作系统层和应用程序层,不少模块具备了继承性和可重用性特征,为程序的后续开发和升级扩展提供了方便。该软件可以灵活地组态并使用控制器上的AD/DA模拟量通道、I/O输入输出点等硬件资源,提供了常见的几种算法供人选择和配置参数,提供了一种基于公式的I/O点组态机制,同时还可以将底层的运行状态通过Modbus/TCP协议发送到上位机以便监控之用,实现了控制器的通用性、信息化和易用性。为了实现该控制器软件,本人主要做了以下方面的工作:提出了分层分块的控制器软件结构,开发了控制器在Linux下需要的设备驱动程序,修改了Linux操作系统,开发了主控制程序以及各个功能模块,提出了一种基于公式的数字量组态的处理方法,提出了算法加入的接口和准则,并对驱动程序和应用程序的正确性和可用性进行了测试。更多还原

【Abstract】 With the rapid development of control technologies and computer science, industrial controllers and their software are becoming more and more intelligentized, all-purpose and open. Traditional controller software has its certain shortage such as lack of flexibility, long developing circle, low adaptability, or in other ways it is too expensive to be fully prevailing in industrial fields. Based on popular ARM9 microprocessors and Linux operating systems, we have presented and developed a kind of new-type, configurable, multi-algorithm, networked and flexible controller software, which could make full use of ARM9 processors’high performance, as well as the functions provided by Linux operating systems.In the dissertation, the controller software is developed following a structure of multi-layer plus multi-module. In this way, some of the modules could be reused in other program developments or in the updated edition of similar controller software. This software program could freely use any of the AD/DA channels, I/O ports, I/O mapping formulas, control algorithms as well as its parameters upon users’input information. Besides, this program could also transmit the controller’s running status to an upper-level PC by Modbus/TCP protocol for monitoring.In this dissertation, a kind of controller software structure of multi-layer plus multi-module is proposed; the Linux device drivers for the controller are developed and tested; certain necessary changes to Linux system is made; all the function modules for the main program are developed; a formula-based method is provided to handle any kind of DI/DO mappings; a method to append new algorithms is proposed. And finally all these above have been tested.更多还原