The authors detail the object-oriented design of a camera vision process control system for the manufacture of rivets. The process control project is described, the software design and implementation is covered and fi...
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The authors detail the object-oriented design of a camera vision process control system for the manufacture of rivets. The process control project is described, the software design and implementation is covered and finally the authors comment on the experience of developing an objectoriented design for the first time. The software design covered is the description of the object model, with the responsibility of each object class discussed and their associations with each other represented using Rumbaugh's OMT (object modeling technique) graphical notation (J. Rumbaugh et al., 1991). The software implementation uses the C language.< >
Tactile sensing is not simply the ability to detect that a contact has occurred between an object and a manipulator, but encompasses a more comprehensive ability to grasp and identify shape, surface features, material...
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Tactile sensing is not simply the ability to detect that a contact has occurred between an object and a manipulator, but encompasses a more comprehensive ability to grasp and identify shape, surface features, material features, force and slippage etc. As technology progresses, sensors able to detect these features have become a reality, and the problem of integrating the information from such sensors must be taken into account. To achieve this objective an appropriate system organisation is required to efficiently and correctly integrate the data into a robust world model. Since the number of sensors that may be applied to any kind of problem is increasing daily, modularity, reusability and expandability are important properties. To achieve this flexibility an objectoriented approach has been followed in modelling the system. The authors consider the use of a multi-functional tactile system and its integration with an objectoriented expert identifier system (OOEIS) which is able to fuse data coming from a sensorized finger, with the aim of identifying the material properties of an object being touched.< >
The authors report and evaluate the experience of applying object-oriented techniques to the development of a real-time system for monitoring and control of remote sites. The system which is currently installed at sev...
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The authors report and evaluate the experience of applying object-oriented techniques to the development of a real-time system for monitoring and control of remote sites. The system which is currently installed at several sites in the UK and elsewhere in Europe also includes database management functions and an interactive operator interface. The authors focus on the object-oriented aspects of the system architecture and on the development process model. Together they provide a technical and organisational framework for projects of similar nature. The pros and cons of the solutions adopted are discussed.< >
The authors describe their personal experiences in developing an advanced control system using the objectoriented programming (OOP) language Smalltalk-80. The emphasis is placed on the use of the language rather than...
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The authors describe their personal experiences in developing an advanced control system using the objectoriented programming (OOP) language Smalltalk-80. The emphasis is placed on the use of the language rather than on the details of the solution. They begin by describing the problem being simulated: an intelligent system identification supervisor (ISIS) for adaptive control applications. The choice of programming language is then described, concentrating on the requirements of the language and the justification for the selection of Smalltalk-80. An overview of the development of ISIS is then presented, concentrating on the approach adopted and giving selected example classes. Lastly a review of the experiences of using Smalltalk-80 is presented showing both the advantages and disadvantages of the language.< >
The Department of Electrical Engineering at the University of Brighton has been directing research at improving manufacturing flexibility within the electronics industry, particularly within surface mount technology (...
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The Department of Electrical Engineering at the University of Brighton has been directing research at improving manufacturing flexibility within the electronics industry, particularly within surface mount technology (SMT) production. One of the areas in which much potential exists, is the development of sensory systems that are able to intelligently control all elements within the manufacturing environment. Machine vision has been shown to improve the flexibility and quality within manufacturing processes. Although the potential for machine vision exists, applications have been restricted to high volume manufacturing due to prohibitive costs and the inherent inflexibility of present vision systems. The authors have been addressing the problems associated with the design and integration of vision systems by developing an objectoriented framework to facilitate machine vision development.< >
Most manufacturing orientedsimulation languages only offer the facility to model the system in one mode: discrete or continuous. However if a real, single mode system is examined more closely, some characteristics of...
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Most manufacturing orientedsimulation languages only offer the facility to model the system in one mode: discrete or continuous. However if a real, single mode system is examined more closely, some characteristics of the opposing mode can usually be found. It is to what extent that the opposing mode can be neglected that determines in which mode the system can be successfully modelled. For many systems it is not satisfactory to approximate to a single mode system, and a mixed-mode systems simulation language would be required. A genuine mixed-mode simulation language would be able to model both discrete and continuous systems individually, in addition to combined continuous/discrete systems, and would therefore be a more useful general purpose simulation tool. It has been postulated that all systems should be treated as mixed-mode, with those with only discrete characteristics, or those with only continuous characteristics treated only as exceptions instead of the rule.< >
The central concept of the work described is that a database can be created which contains all the information about a complex engineering system, specifically a building management system (BMS). This database will be...
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The central concept of the work described is that a database can be created which contains all the information about a complex engineering system, specifically a building management system (BMS). This database will be updated and modified throughout the system lifecycle. Due to the large amount of information required to be entered into these databases, all data entry is done through graphical interfaces according to the maxim 'a picture is worth ten thousand words'. The user draws a picture of what is required, and this is then compiled into the desired database form. BMSs are used to control intelligent buildings. A BMS usually consists of a number of universal network controllers (outstations) which are connected together in a local area network (LAN), or wide area network (WAN). A number of PCs (terminals) can be connected to allow user access to the system for supervisory purposes. An outstation is connected to the hardware components which it controls and from where it gets its operating information. These components are called points; examples being sensors such as temperature, humidity, wind and solar effect, and actuators such as pumps, fans, valves, heating and cooling coils and humidifiers.< >
A new type of traffic simulator has been developed in Finland by Helsinki University of Technology (HUT), Laboratory of Transportation Engineering since 1989. Since 1991, further development has been made together wit...
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ISBN:
(纸本)085296613X
A new type of traffic simulator has been developed in Finland by Helsinki University of Technology (HUT), Laboratory of Transportation Engineering since 1989. Since 1991, further development has been made together with TFK- Transport Research Institute. The name of the simulator is HUTSIM. The main objective is to develop a tool for traffic signal planners to design better signal control systems, programs and strategies. This is done by making it possible to evaluate and compare control arrangements by means of delays, stops and queues caused to traffic by signal. The off-line evaluation allow the designer to verify the level of signal performance to choose the best solutions. The basic method in HUTSIM-simulator is that a real signal controller or a control system is taken into laboratory and the simulator is connected to that system. It means that the simulator generates the traffic and the detector information. The detector information is then transmitted to the controller. The control system makes its own decisions and transmits the signal status information back to the simulator. This kind of arrangement has many advantages because it makes it possible to examine a real control system in almost actual conditions in a laboratory environment. A disadvantage is that some additional communication hardware and software must be built into the simulator. Other advantages of HUTSIM-simulator can be listed as follows: PC-computer usage, micro level simulation, objectoriented programming and visually oriented user interface.
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