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Mechanical Engineering Laboratory 1990 March |
| 8-1 Computer Generated Holograms for Testing Optical Components | 
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Computer Generated Holograms for Testing Optical Components Aspherical optical components are now widely used for the optimization of many kinds of optical instruments and there is a pressing requirement for high precision testing methods for this type of component. Computer generated holograms can be used as high precision test standards for aspherics, and may also beused in a variety of other applications such as aspheric zone plates and optical scanners. |
| 8-2 New Devices for Optical Correlation Systems | 
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New Devices for Optical Correlation Systems Optical correlation systems have the potential to perform extremely high speed pattern recognition, and this is anticipated to be of great importance in the next generation of intelligent manufacturing machines. However, the optical correlators produced until now have been rather difficult to use in a routine production environment. The recent discovery of phase-only matched filtering techniques, together with the availability of a new type of phase-only optical modulator has made the construction of flexible optical correlation systems possible. This research is concerned with the characterization of these new devices, and demonstration of their application in optical correlation and image processing systems. |
| 9-1 Structural Analysis of Remote Sensing System SAR Antenna | 
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Structural Analysis of Remote Sensing System SAR Antenna SAR (Synthetic Aperture Radar) is a useful tool for remote sensing, and is often used from satellites for geological surveys. The resolution of a SAR system is seriously degraded by antenna deformations, and this project consists of a study of likely deformations occurring for an antenna mounted on a satellite in earth orbit. |
| 9-2 Attitude Control System for Large Space Structures | 
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Attitude Control System for Large Space Structures This project is concerned with the study of attitude control systems for large space structures, and is based around the use of control moment gyros (CMGs) which can generate larger torques than conventional reaction wheels. A CMG which can generate a torque of 10Nm has been assembled and tested, and various different multi-CMG arrangements have been studied in terms of three axis controllability and steering complexity. An experimental test of three axis control using four simultaneously controlled CMGs is planned. |
| 10-1 lntelligence Reinforced Machine | 
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lntelligence Reinforced Machine This research comprises the study of a new concept, the Intelligence Reinforced Machine (IRM). In this machine, information processing subsystems are distributed in an appropriate fashion in order to realize various interesting capabilities. A type of IRM known as a "Fractal Machine" has been designed and built, which is composed of identical units interconnected with each other according to simple rules. Each unit has it's own control processor, and global control is realised through interactions between them. |
| 10-2 Software for Computer Integrated Manufacturing (CIM) | 
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Software for Computer Integrated Manufacturing (CIM) This project aims to establish the information technology necessary for the realization of transparent CIM systems with open architectures. This is done through the formulation of the machine production process in a unified framework of the model and physical objects involved. A prototype total software environment has been developed, based on the object-oriented concept, which consists of product models and geometric reasoning supported by flexible user interfaces in both the implementing and operating phases. Case studies (such as the automatic generation of assembly sequences etc.) have shown that this environment is effective for CIM applications. |
| 11-1 Control of Soft-linked Vehicles | 
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Control of Soft-linked Vehicles This study is aimed at the development of a new intelligent autonomous control system for "soft-linking" vehicles. In this system, digital communication between the vehicles links their information systems closely together so that they can move either independently, or together in groups. This system has potential applications to automatically guided vehicles for factory automation and automated highway convoy systems. |
| 11-2 Measurement of Dilemma Phenomenon | 
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Measurement of Dilemma Phenomenon The Dilemma Phenomenon is known in traffic engineering as a dangerous condition that can occur at signalized intersections as vehicles pass through the "Option" and "Dilemma zones. The state variables governing this phenomenon are the speed and distance of the vehicle from the stop bar when the traffic signal changes from green to yellow, and whether or not it passes through the junction during the yellow interval. A new method for detection and measurement of the dilemma state has been developed, and is being applied to the analysis of traffic flow at intersections. |
