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Full-Text Articles in Engineering
Multi-Disciplinary Engineering Research And Development Skills For Mining - A Case Study, C Cook, S Van Duin, Ian Porter
Multi-Disciplinary Engineering Research And Development Skills For Mining - A Case Study, C Cook, S Van Duin, Ian Porter
Christopher Cook
This paper discusses how advanced manufacturing technology (AMT), which is fundamentally reliant on and developed via multi-disciplinary skills, has benefitted non-mining industries, and what lessons can be derived from this experience to benefit the mining industry, particularly underground coal mining. Examples of AMT use in 'conventional' industry, some drawn from the more than 25 years experience in many different industries of the Automation and Robotics team at the University of Wollongong, are described to show typical benefits, risks and opportunities expected in using AMT. Applying AMT to mining brings many unique challenges and this paper expands on these and then …
Decision Support: Informing Flood Management, R Laine, C Cook, B Lemass
Decision Support: Informing Flood Management, R Laine, C Cook, B Lemass
Christopher Cook
This paper describes the development of a new flood management decision support system which significantly improves the ability of flood practitioners to: 1) Identify adaptation and mitigation solutions to flood inundation; 2) Facilitate objective community flood risk management consultation and 3) Justify floodplain management decisions in a transparent and structured manner to all stakeholders. The nature of a Decision Support System (DSS) and its place in floodplain management is described and it is shown how a DSS can be used as a practical tool to identify options available to flood management practitioners. The new flood management system presented in this …
Note On Robot Control System Performance Evaluation, B Evans, Christopher Cook, Geoffrey Trott
Note On Robot Control System Performance Evaluation, B Evans, Christopher Cook, Geoffrey Trott
Christopher Cook
No abstract provided.
Depth Maps Generation Through Thresholding In A Robotics System, H Shi, Christopher Cook
Depth Maps Generation Through Thresholding In A Robotics System, H Shi, Christopher Cook
Christopher Cook
The project described in this paper aims to develop a simple but efficient method for mapping the depth of an object used in an industrial application. In order to produce the depth and cross-sectional images of an object the intensity threshold for converting the grey image to a binary image is varied. This operation will not produce a satisfactory result when the object is observed in air. The result will be however significantly different when the object is located in a colour liquid. Since the refraction of the light in the liquid varies with the depth, the intensity of the …
Extracting 3-Dimensional Information From Single Camera Vision System, H Shi, Christopher Cook, Fazel Naghdy
Extracting 3-Dimensional Information From Single Camera Vision System, H Shi, Christopher Cook, Fazel Naghdy
Christopher Cook
In this paper, a new approach for extracting three-dimensional information from single camera vision system is presented. Only one plan view of the object will be obtained from a camera when the object is placed in the air, even if the threshold of the camera is varied. The result will be however significantly different when the object is located in a colour liquid. It is due to high absorption of the light in a colour liquid. The amount of absorption varies with the depth of the liquid. This allows different plan views related to the depth of an object to …
Performance Benchmarks For Industrial Robots, Christopher Cook
Performance Benchmarks For Industrial Robots, Christopher Cook
Christopher Cook
No abstract provided.
Robots And Automation In The Workplace, Christopher Cook
Robots And Automation In The Workplace, Christopher Cook
Christopher Cook
No abstract provided.
Initiating Curriculum Review: The Chilean Experience, Thomas L. Goldfinch, Anna L. Carew, Christopher David Cook, Patricio Olivares, Paul Cooper, Timothy J. Mccarthy, Sharon Nightingale
Initiating Curriculum Review: The Chilean Experience, Thomas L. Goldfinch, Anna L. Carew, Christopher David Cook, Patricio Olivares, Paul Cooper, Timothy J. Mccarthy, Sharon Nightingale
Christopher Cook
This paper describes the initiation of a comprehensive engineering curriculum review at the Universidad Tecnológica Metropolitana, in Santiago, Chile. This work is being led by a team from the University of Wollongong through a World Bank contract to assist UTEM in modernising its curriculum and in enhancing the 'employability and general formation of its graduates. The paper outlines the background to the project, the structured curriculum review process proposed, and the planning and outcomes of an interactive workshop used to initiate the review. It also makes note of the difficulties faced when initiating a major curriculum review through the cultural, …
The Concept And Design Of Programmable Array Manipulator, Philip Ciufo, Fazel Naghdy, Christopher D. Cook, Pak Chung Wong
The Concept And Design Of Programmable Array Manipulator, Philip Ciufo, Fazel Naghdy, Christopher D. Cook, Pak Chung Wong
Christopher Cook
This paper is the complement to the Programmable Array Manipulator, Part 1. It presents an overview of the R & D program associated with the development of the PAM. The aspects of the control scheme are given as are some experimental results showing the preliminary capabilities of the PAM.
Fusion Control In Dip Transfer Gas Metal Arc Welding, Gary Dean, John Norrish, Christopher Cook
Fusion Control In Dip Transfer Gas Metal Arc Welding, Gary Dean, John Norrish, Christopher Cook
Christopher Cook
No abstract provided.
Self-Tuning Controller For A Non-Linear System, M. A Magdy, R Russell, Christopher Cook
Self-Tuning Controller For A Non-Linear System, M. A Magdy, R Russell, Christopher Cook
Christopher Cook
No abstract provided.
Empirical Modelling Of Force Profiles Produced During Drilling Of Carbon Composites, Christopher Cook, Gursel Alici, Marta Fernandes
Empirical Modelling Of Force Profiles Produced During Drilling Of Carbon Composites, Christopher Cook, Gursel Alici, Marta Fernandes
Christopher Cook
No abstract provided.
Frequency Response Of Polypyrrole Trilayer Actuator Displacement, Stephen John, Gursel Alici, Christopher David Cook
Frequency Response Of Polypyrrole Trilayer Actuator Displacement, Stephen John, Gursel Alici, Christopher David Cook
Christopher Cook
Conducting polymer trilayers are attractive for use in functional devices, given low actuation voltages, operation in air and potentially useful stresses and strains; however, their dynamic behavior must be understood from an engineering perspective before they can be effectively incorporated into a design. As a step towards the identification of the actuator dynamics, frequency response analysis has been performed to identify the magnitude and phase shift of displacement in response to a sinusoidal voltage input. The low damping of the trilayer operating in air and the use of a laser displacement sensor has allowed the frequency response to be continuously …
Vision System Using Coloured Liquid, S Hao, Fazel Naghdy, Christopher Cook
Vision System Using Coloured Liquid, S Hao, Fazel Naghdy, Christopher Cook
Christopher Cook
No abstract provided.
Modelling Of Polypyrrole Actuators, Mehrdad Bahrami Samani, Geoffrey Spinks, Philip Whitten, Christopher Cook
Modelling Of Polypyrrole Actuators, Mehrdad Bahrami Samani, Geoffrey Spinks, Philip Whitten, Christopher Cook
Christopher Cook
Conducting polymers (CP) are a promising area in the field of micro actuators, and have potential applications in micro robotics. Their properties are modelled as having an electro-chemical active component and a passive viscoelastic component. Methods exist to model the passive component as a configuration of springs and dashpots and the electro-active effects as a strain generator. Typically, the strain is assumed to be proportional to the charge transferred, and the two components are assumed to be independent. We show that there is a significant interaction between the two components for polypyrrole actuators, by observing the dynamic elastic modulus whilst …
Computer Control Of Machines With Friction For Precise Motion, Simon Webb, Zheng Li, Christopher David Cook
Computer Control Of Machines With Friction For Precise Motion, Simon Webb, Zheng Li, Christopher David Cook
Christopher Cook
We study the problem of precise control of machines with static and Coulomb friction. An experimental X-Y testbed built for testing various control methods is described and initial experimental results are presented. A simple pole placement controller is designed for computer control of the X-Y testbed based on a generalised sampled-data hold. Robustness and stability of the controller are analysed. Simulation suggests that this controller is able to achieve precise position control even when parameters of both the dynamics of the machine and the characteristics of friction are unknown
Computer Simulation Study On The Dynamic Behaviour Of An Aeac Mechanical Manipulator, M Ibrahim, Christopher Cook, A Tieu
Computer Simulation Study On The Dynamic Behaviour Of An Aeac Mechanical Manipulator, M Ibrahim, Christopher Cook, A Tieu
Christopher Cook
No abstract provided.
Towards The Position Control Of Conducting Polymer Trilayer Bending Actuators With Integrated Feedback Sensor, Stephen John, Gursel Alici, Christopher Cook
Towards The Position Control Of Conducting Polymer Trilayer Bending Actuators With Integrated Feedback Sensor, Stephen John, Gursel Alici, Christopher Cook
Christopher Cook
Conducting polymers have a wide range of reversibly controllable properties, leading to a number of potentially useful devices for robotic applications, including actuators, sensors and batteries. Conducting polymers have the advantages of low weight, low cost, flexibility, small activation potentials (
Establishment Of An Automation Centre Serving Australian Industry, Christopher Cook, B Moore
Establishment Of An Automation Centre Serving Australian Industry, Christopher Cook, B Moore
Christopher Cook
No abstract provided.
A Versatile Experimental Test Rig For Gma Welding Research, Gary Dean, Dominic Cuiuri, John Norrish, Christopher David Cook
A Versatile Experimental Test Rig For Gma Welding Research, Gary Dean, Dominic Cuiuri, John Norrish, Christopher David Cook
Christopher Cook
Welding process research is severely hampered when adequate experimental equipment is not available. With the development of numerous welding processes and the control techniques associated with them, the need now exists for experimental equipment that offers the flexibility to control these processes and to set up parameters associated with the research. At the University of Wollongong an experimental research rig has been developed based on a digital signal processor control system that offers the researcher the facilities to study the various processes associated with GMA welding.
Opportunities In Power Applications Of Superconductors, C Sloggett, Christopher Cook, S Dou, N Savvides, A. Secrett
Opportunities In Power Applications Of Superconductors, C Sloggett, Christopher Cook, S Dou, N Savvides, A. Secrett
Christopher Cook
Since the discovery of high temperature superconductors in 1986/87, rapid progress has been made in the development of these materials in forms suitable for engineering applications. Amongst the most important are flexible silver/superconductor composite wires or tapes capable of carrying tens of amperes at liquid nitrogen temperatures essentially without loss. Diverse applications in areas such as electricity supply, medicine industry and transportation now seem accessible and a total market in excess of US $l5O billion is forecast for the year 2020. A consortium consisting of Metal Manufactures Ltd. (MM), the University of Wollongong and CSIRO has produced high quality tapes …
Practical Advanced Manufacturing, Christopher Cook
Practical Advanced Manufacturing, Christopher Cook
Christopher Cook
No abstract provided.
Novel Control Techniques For Co2 Shielded Gas Metal Arc Welding, Dominic Cuiuri, John Norrish, Christopher Cook
Novel Control Techniques For Co2 Shielded Gas Metal Arc Welding, Dominic Cuiuri, John Norrish, Christopher Cook
Christopher Cook
The control strategies that have been developed over the past four decades to control the inherently unstable metal transfer in the CO2-shielded GMAW process are described. The fundamental reasons for poor arc stability with CO2 as a shielding gas are discussed. From an understanding of the process behaviour, a new process control technique is proposed, and the future direction of research in this area is discussed.
Training In Advanced Manufacturing At The Australian Training School For Advanced Manufacturing, Christopher Cook, L Pogson
Training In Advanced Manufacturing At The Australian Training School For Advanced Manufacturing, Christopher Cook, L Pogson
Christopher Cook
No abstract provided.
A Major Robot An Automation Initiative For Australian Manufacturers', B Moore, Christopher Cook
A Major Robot An Automation Initiative For Australian Manufacturers', B Moore, Christopher Cook
Christopher Cook
No abstract provided.
A Major Initiative For Power Engineering In Australia, Christopher Cook, R Rollinson
A Major Initiative For Power Engineering In Australia, Christopher Cook, R Rollinson
Christopher Cook
No abstract provided.
Robust Adaptive Control For Industrial Robots - A Decentralized System Method, M Liu, Christopher Cook
Robust Adaptive Control For Industrial Robots - A Decentralized System Method, M Liu, Christopher Cook
Christopher Cook
An adaptive control approach is presented for the tracking control of industrial robots. The approach utilizes the fact that a robot model can be described by equations that are linear in the system's unknown parameters. Taking uncertainties into account, the resulting controller has the property of robustness. The proof of stability and analytical results of the boundness of position tracking errors are given. By introducing filter operations in state measurements, the approach avoids the difficulty of measuring the accelerations of the robots' actuators. Simulation results are also presented
Novel Tooth Design For A Tubular Linear Motor For Machine Tool Axis, Philip Commins, Jeffrey Moscrop, Christopher Cook
Novel Tooth Design For A Tubular Linear Motor For Machine Tool Axis, Philip Commins, Jeffrey Moscrop, Christopher Cook
Christopher Cook
Permanent magnet tubular linear motors have shown potential for use as direct drives in high precision machine tools. These devices are capable of replacing the traditional ball screw, given their ability to overcome or reduce many of the fundamental mechanical properties that limit the precision performance of the ball screw. However, given the desire from industry to increase speed and acceleration, the physical size of the motor must be minimised while maintaining high force output to increase bandwidth in high precision applications. This paper presents a new optimal tooth design to reduce the frame size of a slotted tubular linear …
Torque Perturbations And Dynamic Stiffness Of Linear Motors For Grinding Machines, Jeffrey Moscrop, Philip Commins, Christopher Cook
Torque Perturbations And Dynamic Stiffness Of Linear Motors For Grinding Machines, Jeffrey Moscrop, Philip Commins, Christopher Cook
Christopher Cook
No abstract provided.
A New Approach To Controlled Short Circuit Transfer In Gmaw, John Norrish, Gary Dean, Dominic Cuiuri, Christopher Cook
A New Approach To Controlled Short Circuit Transfer In Gmaw, John Norrish, Gary Dean, Dominic Cuiuri, Christopher Cook
Christopher Cook
No abstract provided.