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Articles 1 - 30 of 54
Full-Text Articles in Engineering
Reducing Wave-Based Teleoperator Reflections For Unknown Environments, Laurence Bate, Christopher Cook, Zheng Li
Reducing Wave-Based Teleoperator Reflections For Unknown Environments, Laurence Bate, Christopher Cook, Zheng Li
Christopher Cook
Wave variables guarantee stability for delayed teleoperation. They also introduce reflections which can prove very disorientating for an operator. This paper presents a new method for reducing the wave reflections when operating in unknown environments. The new method does not only guarantee stability but also laboratory experiments show it also reduces wave reflections allowing for improved velocity tracking and force feedback in complex and unknown operating environments.
Calorimetric Ac Loss Measurement Of Mgb2 Superconducting Tape In An Alternating Transport Current And Direct Magnetic Field, K See, X Xu, J Horvat, C Cook, S. Dou
Calorimetric Ac Loss Measurement Of Mgb2 Superconducting Tape In An Alternating Transport Current And Direct Magnetic Field, K See, X Xu, J Horvat, C Cook, S. Dou
Christopher Cook
Applications of MgB2 superconductors in electrical engineering have been widely reported, and various studies have been made to define their alternating current (AC) losses. However, studies on the transport losses with an applied transverse DC magnetic field have not been conducted, even though this is one of the favored conditions in applications of practical MgB2 tapes. Methods and techniques used to characterize and measure these losses have so far been grouped into ‘electrical’ and ‘calorimetric’ approaches with external conditions set to resemble the application conditions. In this paper, we present a new approach to mounting the sample and employ the …
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 …
Bending Modeling And Its Experimental Verification For Conducting Polymer Actuators Dedicated To Manipulation Applications, Christopher Cook, Gursel Alici, Brian Mui
Bending Modeling And Its Experimental Verification For Conducting Polymer Actuators Dedicated To Manipulation Applications, Christopher Cook, Gursel Alici, Brian Mui
Christopher Cook
No abstract provided.
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.
New General Algorithm For Describing Manipulator Kinematics, Christopher Cook, T Vu-Dinh
New General Algorithm For Describing Manipulator Kinematics, Christopher Cook, T Vu-Dinh
Christopher Cook
A new algorithm for representing the kinematic problem of robot arms is presented, and its advantages discused. It is shown that manipulator links and joints can be described using generalised cascaded 'robot joint descriptors'. Such a description provides a theoretical basis for the development of a kinematic controller applicable to most manipulator geometries.
Robots And Automation In The Workplace, Christopher Cook
Robots And Automation In The Workplace, Christopher Cook
Christopher Cook
No abstract provided.
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.
Robotics Assembly Of Electronic Components On To Pcbs, Christopher Cook
Robotics Assembly Of Electronic Components On To Pcbs, Christopher Cook
Christopher Cook
No abstract provided.
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.
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.
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.
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.
Transition Velocity Function For Impulse Control Systems, Stephen Van Duin, Matthias Ahlswede, Christopher Cook
Transition Velocity Function For Impulse Control Systems, Stephen Van Duin, Matthias Ahlswede, Christopher Cook
Christopher Cook
This paper presents a modified impulse controller that is used to improve the velocity tracking of a servomechanism having characteristics of high nonlinear friction. A hybrid control scheme consisting of a conventional PID part and an impulsive part is used as a basis to the modified controller. This has previously been used to improve the position and velocity tracking of robot manipulators at very low velocities. Experiments show that at higher velocities the improved performance of the impulse part of the hybrid controller diminishes and can be counterproductive at these speeds when compared to conventional PID control alone. The modified …
Robotic Drilling Of Carbon Fibre, Marta Fernandes, Steve Gower, Friso Deboer, Christopher Cook
Robotic Drilling Of Carbon Fibre, Marta Fernandes, Steve Gower, Friso Deboer, Christopher Cook
Christopher Cook
This paper describes ongoing research in control of robotic drilling using carbon fiber composites. This work has been motivated by the aircraft industry where there is a significant interest in automating part of the production process to improve productivity and consistency. The requirements for robotic drilling as well as the problems inherent in drilling composites are addressed in this paper. Forces and moments produced during the drilling process are measured and analyzed in order to develop a suitable control technique.
Development Of A Supervisory Computer Control System For An Educational Fms, N Laszlo, Christopher Cook, Guenter Arndt, Yueping Yao
Development Of A Supervisory Computer Control System For An Educational Fms, N Laszlo, Christopher Cook, Guenter Arndt, Yueping Yao
Christopher Cook
A control system model for a fully integrated flexible manufacturing system (FMS) is presented. This model is being implemented on the ACME FMS, an educational system developed at the University of Wollongong. The implementation has progressed to the stage where it is coordinating activities within the system's cell.