The geometric bounding toolbox is a set of routines in matlabTM to perform operations on polytopes, polyhedra and ellipsoids. The package has the efficiency and ease of use of its routines that seems to make these com...
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The geometric bounding toolbox is a set of routines in matlabTM to perform operations on polytopes, polyhedra and ellipsoids. The package has the efficiency and ease of use of its routines that seems to make these complex operations simple. The paper is an overview of the use of matlab toolbox GBT for system identification and control.
This study focuses on the VME based multi processor, multi axis control system which has wide application in high precision production machines. A mechatronics approach adopted throughout the project resulted in a ver...
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This study focuses on the VME based multi processor, multi axis control system which has wide application in high precision production machines. A mechatronics approach adopted throughout the project resulted in a very dramatic improvement in system performance. It will be shown that state controltechniques offer a viable approach to designing distributed intelligent controls for fast acting precision servo systems. Two self commissioning strategies are implemented. Results obtained are discussed and compared to the 'tuning parameters' set by an experienced commissioning engineer.
The proceedings contains 10 articles. Topics discussed include observations on the implementation of simultaneous engineering, the use of gaming techniques to empower teams and case studies of team working in selected...
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The proceedings contains 10 articles. Topics discussed include observations on the implementation of simultaneous engineering, the use of gaming techniques to empower teams and case studies of team working in selected UK industry, a methodology for product life-cycle development for global manufacturing, extended enterprise partnerships, design for testability, reliability and maintainability, concurrent engineering with suppliers, development of a knowledge platform on concurrent engineering, environments to support concurrent design teams, designers using cooperative knowledge, an agent-oriented framework and concurrent software engineering.
The need for a continuing improvement philosophy for process plant maintenance is acknowledged at New Thames Mill. This objective is being achieved with the integration of condition monitoring data, product quality me...
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The need for a continuing improvement philosophy for process plant maintenance is acknowledged at New Thames Mill. This objective is being achieved with the integration of condition monitoring data, product quality measurements and a computer based maintenance management system.
Motion controllers are an essential component of modern manufacturing machinery. The computer control systems are a key part in designing and building production machines. Due to a lack of solid mechanical parts to au...
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Motion controllers are an essential component of modern manufacturing machinery. The computer control systems are a key part in designing and building production machines. Due to a lack of solid mechanical parts to automatically link motions, coordination and synchronisation problems among the interactive motions are the one of major barriers which can hamper further advances with the new design philosophy. The tight control and flexible operation of a machine with multi-axes can only be realised if the software controlled drives can be properly coordinated and synchronised. This paper presents the concept and implementation of a scheme that uses a fuzzy logic control approach to realise enhanced drive synchronisation. A new master-slave configuration using fuzzy logic is developed. Imperfect synchronisation can be corrected on-line. The simulation and experimental results show that the fuzzy based 'closed loop synchronisation mechanism' gives enhanced performance when compared to conventional master-slave open loop synchronisation techniques.
The use of model-based approaches is proposed to improve the control performance of an industrial polymerization reactor. This involves the development of a process model using system identification techniques, the si...
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The use of model-based approaches is proposed to improve the control performance of an industrial polymerization reactor. This involves the development of a process model using system identification techniques, the simulation of the plant within the Simulink environment to allow for the design and validation of control strategies. From these studies a Smith Predictor was implemented to significantly improve the polymer viscosity control. A hardware platform is developed to facilitate the implementation of sophisticated algorithms such as recursive least squares, that could not be accommodated on the existing DCS.
The development and implementation of a 'Fibertron' machine vision system has provided the first continuous, quantitative measurement of refined wood fibers in the composite panel industry. This work highlight...
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The development and implementation of a 'Fibertron' machine vision system has provided the first continuous, quantitative measurement of refined wood fibers in the composite panel industry. This work highlights the advantages of machine vision in situations where a human in performing a visual assessment of a product, as a basis on which to control a key part of the manufacturing process. The strictly logical evolutionary nature of the control algorithm involved produces a control strategy which is not influenced by difference of opinion, subjectiveness, or memory loss, and which is able to adapt to both short- and long-term changes in processing conditions.
A canard-controlled missile airframe configuration with a twist-and-steer (or polar) control system affords economies in design and kinematic performance but at present does not permit a direct analytical solution for...
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A canard-controlled missile airframe configuration with a twist-and-steer (or polar) control system affords economies in design and kinematic performance but at present does not permit a direct analytical solution for the optimum guidance and roll control autopilot laws. The development of a stable roll loop of adequate bandwidth and response is fundamental in a twist-and-steer missile. Whilst the application of modern control theory has been successfully applied to the design of aileron-constrained time-invariant cases, its extension to the nonlinear case requires further development. Roll loop design is commonly carried out using frequency-domain methods coupled with detailed mathematical modelling and digital simulation. The use of commercially available control system design programs facilitates loop design and sensitivity studies across the operating envelope. Describing function techniques may be used to investigate limit cycle stability etc. The paper discusses the aerodynamics and the computer-aided design.< >
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