基于TMS320F2812的CAN总线通信的设计与实现

TMS320F2812是一种用于控制的32位定点DSP芯片，对其增强型控制器eCAN的增强特性进行了分析。重点介绍了CAN总线通信中利用eCAN构建CAN网络的硬件节点设计，并给出了CAN总线波特率位定时计算方法，CAN软件设计的流程和对应的C语言初始化，发送接收调试程序，总结了在实际项目应用中的调试技巧。这一设计基于电动汽车，已成功应用于混合动力汽车能量总成控制系统。     

Implementation of rule-based information systems for integratedmanufacturing

Focuses on the development of a methodology within a software environment for automating the rule-based implementation of specifications of integrated manufacturing information systems. The specifications are initially formulated in a natural language and subsequently represented in terms of a graphical representation by the system designer. A new graphical representation tool is based on updated Petri nets (UPN) that we have developed as a specialized version of colored Petri nets. The rule-based implementation approach utilizes the similarity of features between UPN and the general rule specification language used for the implementation. The automation of the translation of UPN to the rule specification language is expected to considerably reduce the life-cycle for design and implementation of the system. The application presented deals with the control and management of information flow between the computer-aided design, process planning, manufacturing resource planning and shop floor control databases. This provides an integrated information framework for computer integrated manufacturing systems     

滤池微机控制系统

本文利用图形编程软件,依照软件工程规范设计了滤池微机控制系统,着重描述了使用图形编程软件的编程方法和过程,同时介绍了针对被控对象可靠性低、维修率高等特点,如何设计灵活实用的控制系统。     

The design of a language processor generator

Language processor generators are systems that produce various language processors (including compilers) on the basis of a high-level specification. The design of language processor generators is discussed on the basis of experiments with a traditional compiler writing system (HLP78) employing pore LALR parsing and general attribute grammars. It is argued that these methods are too primitive from the practical point of view. The design of a new language processor generator, HLP84, is based on this view. This system is an attempt to provide high-level tools for a restricted class of applications (one-pass analysis). The syntactic facilities include regular expressions on the right-hand sides of productions, a disambiguating mechanism that is integrated with regular expressions, and a mechanism for using semantic information to aid parsing. The semantic facilities include automatic support for semantic error handling and for symbol tables. Early experiences with the new system show that in spite of the general overhead caused by the higher automation level, the system allows the generation of reasonably efficient processors.     

Answer set based design of knowledge systems

The aim of this paper is to demonstrate that A-Prolog is a powerful language for the construction of reasoning systems. In fact, A-Prolog allows to specify the initial situation, the domain model, the control knowledge, and the reasoning modules. Moreover, it is efficient enough to be used for practical tasks and can be nicely integrated with programming languages such as Java. An extension of A-Prolog (CR-Prolog) allows to further improve the quality of reasoning by specifying requirements that the solutions should satisfy if at all possible. The features of A-Prolog and CR-Prolog are demonstrated by describing in detail the design of USA-Advisor, an A-Prolog based decision support system for the Space Shuttle flight controllers.     

组态王与GSM在远程水情监控管理系统中的应用

本文利用“组态王”工控软件在PC机管理软件设计中的优势与GSM短消息数据传输技术在通信方面的突出优点,在组态王的命令语言编辑环境下进行程序设计实现了水情监测管理系统软件对GSM短消息数据通信过程的控制,从而开发了一种实用的新型远程水情监控管理系统。     

微机MIS集成构造系统的研究与实践

微机ＭＩＳ集成构造系统是基于软件重用理论，采用应用描述语言，扩展数据字典和标准预制软构件快速构造信息处理系统的一种应用开发工具环境。本文主要介绍其设计思想，基本结构，构造原理，设计原则和实际使用情况。     

工厂静电除尘监控系统的设计与实现

针对工厂烟气对大气污染的严酷现实,提出了应用InTouch 7.11软件来设计静电除尘监控系统,即运用InTouch 7.11设计监控主机,去控制、监督现场的PLC控制单元,对该系统的结构、上位机的设计、现场控制单元的组成等作了详细的说明.实践表明,该系统操作方便、运行稳定可靠,实现了控制、维护、与技术管理的集成,具有较强的实用价值.     

基于SOPC技术的直流电机控制系统的设计

介绍了一种基于SOPC技术在FPGA上实现的直流电机控制系统。采用硬件描述语言Verilog HDL在Quartus Ⅱ中完成了PWM IP核的设计,并在Nios Ⅱ集成开发环境中编写了PID控制算法及相应的应用程序,实现了直流电机转速和转向的准确控制。     

基于远程操作的多路信号采集与开关控制系统设计

针对航天器地面集成实验系统设计中的实际需要,提出了一种多路信号采集和开关控制系统;详细介绍了多路(模拟和数字)信号采集的硬件设计,信号在传输中的开关控制和通道选择设计,主要针对多路CAN总线信号和多路模拟信号、实现信号的采集及开关控制;系统包括AVR单片机、多路模拟开关、AD转换器、CAN总线收发器、继电器、掉电数据保存单元等,通过串口完成单片机与计算机间异步串行通信功能,实现远程操作.最后通过Proteus仿真,结果表明该设计能够有效满足实际系统要求.     

Active diagnosis of discrete-event systems

The need for accurate and timely diagnosis of system failures and the advantages of automated diagnostic systems are well appreciated. However, diagnosability considerations are often not explicitly taken into account in the system design. In particular, design of the controller and that of the diagnostic subsystem are decoupled, and this may significantly affect the diagnosability properties of a system. The authors present an integrated approach to control and diagnosis. More specifically, they present an approach for the design of diagnosable systems by appropriate design of the system controller. This problem, which they refer to as the active diagnosis problem, is studied in the framework of discrete-event systems (DESs); it is based on prior and new results on the theory of diagnosis for DESs and on existing results in supervisory control under partial observations. They formulate the active diagnosis problem as a supervisory control problem where the legal language is an “appropriate” regular sublanguage of the regular language generated by the system. They present an iterative procedure for determining the supremal controllable, observable, and diagnosable sublanguage of the legal language and for obtaining the supervisor that synthesizes this language. This procedure provides both a controller that ensures diagnosability of the closed-loop system and a diagnoser for online failure diagnosis. The procedure can be implemented using finite-state machines and is guaranteed to converge in a finite number of iterations. The authors illustrate their approach using a simple pump-valve system     

Robot language from the standpoint of FA system development—An outline of FA-BASIC

A new unified FA (Factory Automation) language has been developed. The language is suited for robot control, vision system control and programmable controller (PC) control and enables a unified means for programming. The language is called FA-BASIC and has common functions such as expression, control structure and input/output statement based on BASIC language.

FA-BASIC is composed of three subsystems: FA-BASIC/R for robot control, FA-BASIC/V for vision system control and FA-BASIC/C for PCs.

Many languages have been developed up to now, but most of them were aimed at single purposes. These single purpose languages were too limited when developing an integrated FA system, because several languages and different program-making methods must be mastered.

Using FA-BASIC, programming with mutual interconnections between robots, PCs and vision devices is done by the one common method.

In this paper, the basic design concept and functions of FA-BASIC will be presented, along with the features of FA-BASIC/R and on outline of a robot control system using a standard mechanism-independent intermediate language and standard fundamental modules. Also, for easy programming, an off-line programming system with graphical aids and a menu-selection method which require no special effort to master will be introduced as the only present-day universal robot programming method.     

An Intelligent Tool to Support Requirements Analysis and Conceptual Design of Database Design

As an application of artificial intelligence and expert system technology to database design,this paper presents an intelligent design tool NITDT,which comprises a requirements specification language NITSL,a knowledge representation language NITKL,and an inference engine with uncertainty reasoning capability.NITDT now covers the requirements analysis and conceptual design of database design.However,it is possible to be integrated with another database design tool,NITDBA,developed also at NIT to become an integrated design tool supporting the whole process of database design.     

基于CPLD的红外遥控发射接收设计与仿真

该文在CPLD红外遥控原理的基础卜，详细介绍了在MAX＋PLUSⅡ的可编程逻辑设计环境下，用AHDL语言设计与仿真CPLD红外遥控发射接收硬件电路的方法。文中给出了利用AHDL语言分别实现红外遥控发射模块的信号调制以及接收模块的信号解码或识别的程序设计，并对结果进行了仿真。通过仿真结果，可以看出利用CPLD器件完全可以实现红外遥控电路的发射与接收功能。因此，CPLD器件在红外遥控系统中具有重要的实用价值。     

A computer-aided design tool for robustness analysis and control-relevant identification of Horizon Predictive Control with application to a binary distillation column

This paper describes a MATLAB-based computer-aided design tool, IRA-HPC, which accomplishes integrated system identification and robustness analysis for Horizon Predictive Control (HPC), a model predictive control algorithm implemented on the Application Module of the Honeywell TDC 3000 distributed control system. The tool addresses lifecycle as well as functional aspects of the technology, with the goal of making advanced control principles more accessible to the practising control engineer. IRA-HPC systematically performs the various stages of system identification in a control-relevant framework (addressing input design, parameter estimation, and model validation from the standpoint of the final purpose of the model, which is control system design), followed by robust HPC controller tuning using the Structured Singular Value (μ) paradigm as a basis. The benefits of the tool are shown experimentally in the modelling and control of a methanol/isopropanol pilot-scale distillation column, interfaced to an industrial-scale real-time computing testbed. The example demonstrates the practical feasibility of this tool and its benefits in terms of simplifying the choices of design variables in integrated identification and control design.     

基于基类模型模板的自动武器协同设计系统

分析了现代产品协同设计系统功能模型和体系架构,以面向自动武器工程实际应用为目标,设计了统一的协同设计基类三维模型模板及数据关系模式。在此基础上自主开发的自动武器协同辅助设计系统,包括协同行为预测执行分析、自动武器标准模块库管理等功能模块,实现图层级别的协同到模型级别协同的转化。采用面向对象方法对自动武器协同设计开发项目中的应用程序、模型库、建模工具集等集成化,结合CAD软件底层函数的设计与开发技术及提供通用语言接口支持的网络服务技术,为系统的实施提供了可靠的交互支撑环境。     

一种数字式可调稳压电源系统的设计

针对自动检测等应用系统对直流稳压电源的需求,设计了一种数字式可调稳压电源系统;该数字式可调稳压电源系统选择单片机(AT89S51)作为核心控制部件,外围模块电路包括MCP4921构成的AD转换模块、基于集成运放LM324设计的电压电流放大模块与采样电压降压模块、液晶显示模块及基于78系列、79系列集成稳压芯片设计的电源供电模块;系统软件设计采用C语言进行了模块化程序结构设计;测试结果表明:该系统输出可调直流电压范围为0~12 V、输出直流电流为500 mA、电压误差小于0.1 V,且可以通过键盘电路进行目标电压的设置;具有设计简单、输出电压稳定、性能可靠等特点。