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 control techniques 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 7 articles. Topics discussed include the control and commissioning of high precision mechanical systems using advanced digital motion control algorithms, automating a horizontal flow-wrapping ...
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The proceedings contains 7 articles. Topics discussed include the control and commissioning of high precision mechanical systems using advanced digital motion control algorithms, automating a horizontal flow-wrapping machine, PC control of an automatic flexible assembly operation, manufacturing machinery, the synchronisation of servo drives using fuzzy logic control, IEC 1131-3 programming for motion control and mechatronic approach to the design of a flexible carpet loom.
Programmable Transmission System (PTS) is designed to improve the flexibility and performance of wrapping and packaging machines. PTS replaces mechanical linkages with separately controlled servo motors. An example of...
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Programmable Transmission System (PTS) is designed to improve the flexibility and performance of wrapping and packaging machines. PTS replaces mechanical linkages with separately controlled servo motors. An example of which is the horizontal flow-wrapping machine used to wrap solid or filled bar products. The purpose of this work is to discuss the application of the PTS to this type of machine with emphasis directed to the requirements of the machine and what features of the PTS are used to address them.
With the growing interest in the use of system identification as a means to build models for control design, the paper presents methods for robust model based control design in order to reach the goal of high performa...
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With the growing interest in the use of system identification as a means to build models for control design, the paper presents methods for robust model based control design in order to reach the goal of highperformance plant control. The traditional identification method delivers a model in the form of a linear time invariant finite dimensional system also called nominal model and not all controllers suited for the nominal model will perform well with the plant. The main principle tackled in this report is that robustness must be traded off versus nominal performance.
The use of model-based approaches is proposed to improve the controlperformance 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 controlperformance 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 proceedings contains 9 articles. Topics discussed include toolbox of garment handling techniques, machine vision controlled laser cutting of a non-rigid product, mechatronic design of an automated garment producti...
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The proceedings contains 9 articles. Topics discussed include toolbox of garment handling techniques, machine vision controlled laser cutting of a non-rigid product, mechatronic design of an automated garment production line, soft product assembly and manipulation, a tactile sensing technique for automatic gripping of compact shaped non-rigid materials, a vision guided robot manipulator for horticultural applications, high speed assembly of flexible confectionery packages, modelling primal cuts on pork carcasses for automated butchery and assembling non-rigid products in the shoe industry.
This paper presents an investigation into the utilisation of parallel computing techniques for real-time simulation and control of a flexible beam structure in transverse vibration. A cantilever beam system in transve...
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This paper presents an investigation into the utilisation of parallel computing techniques for real-time simulation and control of a flexible beam structure in transverse vibration. A cantilever beam system in transverse vibration is considered in this paper. The unwanted vibrations in the structure are assumed to be due to a single point disturbance of broadband nature. First order central finite difference (FD) methods are used to study the behaviour of the beam and develop a suitable test and verification platform. An active vibration control (AVC) system is designed utilising a single-input single-output (SISO) control structure to yield optimum cancellation of broadband vibration at an observation point along the beam. The controller design relations are formulated such that to allow on-line design and implementation and, thus, yield a self-tuning control algorithm. The simulation and control algorithms are implemented on several hardware architectures and the performance in each case is assessed. A comparison of the results of these implementations, on the basis of real-time performance, is made and discussed.
System identification complements not only the robustness requirement of maintaining control in the face of plant uncertainty but thrives on the symbiotic relationship with it. This relationship exists as an iterative...
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System identification complements not only the robustness requirement of maintaining control in the face of plant uncertainty but thrives on the symbiotic relationship with it. This relationship exists as an iterative process of identification and control design while the identification requirement derives it specification from the closed loop performance with the previous controller and delivers an error bound that dictates the design of the successive controller. This paper applies and extends techniques in the emerging field of HINF identification to the problem of identifying a real plant as well as estimating the called a priori information necessary to determine worst case error bounds.
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.
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