Crack Propagation within Graded Interfaces. Functionally graded interfaces are a technologically new way of joining materials in a wide range of biomedical and industrial applications. The reduction in the interfacial stresses resulting from the graded interface increases the structural integrity of the component, however, existing models do not fully address issues of plasticity and cyclic fatigue to their fracture. The intention of this study is to investigate how modifications to the ductil ....Crack Propagation within Graded Interfaces. Functionally graded interfaces are a technologically new way of joining materials in a wide range of biomedical and industrial applications. The reduction in the interfacial stresses resulting from the graded interface increases the structural integrity of the component, however, existing models do not fully address issues of plasticity and cyclic fatigue to their fracture. The intention of this study is to investigate how modifications to the ductile reinforcement phase and how the cyclic loading influence crack extension within a graded interface. These results will assist in future design and prediction of the in-service lifetime of components containing gradient interfaces.Read moreRead less
Granular dynamics: characterization, modelling and application. Storage and transport of bulk solids are widely encountered in mineral, metallurgical and chemical industrials which are important to Australia. The design and control of bulk solids handling equipment must be optimised for the efficiency of processing. This project provides a systematic investigation of the techniques used to characterize bulk solids, and applies the new findings to hopper flow and pneumatic conveying. This, togeth ....Granular dynamics: characterization, modelling and application. Storage and transport of bulk solids are widely encountered in mineral, metallurgical and chemical industrials which are important to Australia. The design and control of bulk solids handling equipment must be optimised for the efficiency of processing. This project provides a systematic investigation of the techniques used to characterize bulk solids, and applies the new findings to hopper flow and pneumatic conveying. This, together with the research training offered through the conduct of the work, is very helpful to maintaining Australia’s leading position in bulk solids handling and application in resource, energy, process and allied industries.Read moreRead less
A Segmented Interior Permanent Magnet Synchronous Motor for Wide Field Weakening Range and its Sensorless Control using Improved Flux Estimators. Australia has the world's second largest reserve (after China) of high energy-density permanent magnet (neodymium-iron-boron) material for the IPM motor. The present limitation of the machine to be driven sensorless over a wide speed range with field weakening is believed to be holding back its widespread use in applications other than servo-type which ....A Segmented Interior Permanent Magnet Synchronous Motor for Wide Field Weakening Range and its Sensorless Control using Improved Flux Estimators. Australia has the world's second largest reserve (after China) of high energy-density permanent magnet (neodymium-iron-boron) material for the IPM motor. The present limitation of the machine to be driven sensorless over a wide speed range with field weakening is believed to be holding back its widespread use in applications other than servo-type which requires high-resolution mechanical sensors. Extension of the motor speed range by a combination of magnetic system design (for large field weakening range), and sensorless position and flux estimation with sufficient accuracy for fast dynamic control should lead to large scale adoption of this motor, and hence to significant improvement in energy efficiency and market share for Australia.Read moreRead less
Towards a unified theory of constrained control and estimation. The project will investigate the implications of duality and other connections between constrained control and estimation. We believe that the research will result in a richer understanding of these problems. In particular, we envisage an impact in at least four areas: (i) Computational issues, i.e., development of more efficient algorithms for constrained problems. (ii) Geometry of constrained problems, by extending recent results ....Towards a unified theory of constrained control and estimation. The project will investigate the implications of duality and other connections between constrained control and estimation. We believe that the research will result in a richer understanding of these problems. In particular, we envisage an impact in at least four areas: (i) Computational issues, i.e., development of more efficient algorithms for constrained problems. (ii) Geometry of constrained problems, by extending recent results pertaining to constrained control to estimation problems. (iii) Problems with mixed constraints, for example, interval and finite set constraints. (iv) Fundamental limitations imposed by constraints to filtering and control problems.Read moreRead less
Network Design and Management for a Pseudolite and GPS Based Ubiquitous Positioning System. The Locata positioning technology uses a network of terrestrial based signal transmitters (pseudolites) and GPS satellites, to provide ubiquitous positioning (indoors and outdoors) in difficult environments. This research student project will focus on the intelligence associated with the pseudolite network such as: autonomous network installation, network integrity, and quality control. The implementati ....Network Design and Management for a Pseudolite and GPS Based Ubiquitous Positioning System. The Locata positioning technology uses a network of terrestrial based signal transmitters (pseudolites) and GPS satellites, to provide ubiquitous positioning (indoors and outdoors) in difficult environments. This research student project will focus on the intelligence associated with the pseudolite network such as: autonomous network installation, network integrity, and quality control. The implementation of innovative algorithms and methodologies developed in this research, will allow a robust, reliable and accurate positioning system for challenging indoor and outdoor environments, where current systems cannot work satisfactorily.Read moreRead less
New System Identification Techniques Utilising Misspecified Models. National benefits of the proposed research project will result from improvements in control due to a better, more complete understanding of the models obtained by the newly proposed system identification technique. The resulting effect on industrial practice will be an increase in efficiency, by reduced waste, lower pollution levels and increased throughput. Also, the techniques developed will be directly applicable to current r ....New System Identification Techniques Utilising Misspecified Models. National benefits of the proposed research project will result from improvements in control due to a better, more complete understanding of the models obtained by the newly proposed system identification technique. The resulting effect on industrial practice will be an increase in efficiency, by reduced waste, lower pollution levels and increased throughput. Also, the techniques developed will be directly applicable to current research in the areas of complex systems, such as smart structures and biological studies of the dynamic effects of drugs and hormones on genes.Read moreRead less
Research into techniques for enhancing the heat transfer performance of finned-tube heat exchangers. This project explores several methods for enhancing the heat transfer performance of mechanically bonded finned tube heat exchangers. The methods would be analysed experimentally, and using finite elements, numerically. Any increase in heat transfer efficiency would contribute to the conservation of energy, and therefore, of natural resources. An improved design of heat exchangers would give a de ....Research into techniques for enhancing the heat transfer performance of finned-tube heat exchangers. This project explores several methods for enhancing the heat transfer performance of mechanically bonded finned tube heat exchangers. The methods would be analysed experimentally, and using finite elements, numerically. Any increase in heat transfer efficiency would contribute to the conservation of energy, and therefore, of natural resources. An improved design of heat exchangers would give a definite competitive edge to the Australian manufacturer. An equally significant outcome would be the training of a research person in industry-related research and skilled both in experimental and numerical procedures.Read moreRead less
A new paradigm for teaching machines to replicate the manipulation skills of humans using tactile sensing in a virtual environment. The broad aims of this proposal are to study machine learning in the psychomotor domain, and to show the feasibility of on line transfer of physically constrained manipulation skills from a human operator to a manipulator through demonstration utilising a virtual training environment with tactile sensing. The proposed work is unique in its approach and hypothesis, a ....A new paradigm for teaching machines to replicate the manipulation skills of humans using tactile sensing in a virtual environment. The broad aims of this proposal are to study machine learning in the psychomotor domain, and to show the feasibility of on line transfer of physically constrained manipulation skills from a human operator to a manipulator through demonstration utilising a virtual training environment with tactile sensing. The proposed work is unique in its approach and hypothesis, and will provide a new insight into the nature of transfer of manipulation skills from human to machine. It will produce new generic intelligent algorithms and methodologies to emulate different stages of human psychomotor learning in machine including perception, imitation, mechanism and complex/overt response.Read moreRead less
Developing a new technology: advanced surface hardening and grinding in a single operation. Our advances will give Australian manufacturing industry first access to a significant technological advance in precision grinding, a critical machining process. This will improve our international competitiveness, through major cost reductions by simplifying the manufacturing procedure and by eliminating the use of toxic coolants. The technology will provide significant opportunities for further Australi ....Developing a new technology: advanced surface hardening and grinding in a single operation. Our advances will give Australian manufacturing industry first access to a significant technological advance in precision grinding, a critical machining process. This will improve our international competitiveness, through major cost reductions by simplifying the manufacturing procedure and by eliminating the use of toxic coolants. The technology will provide significant opportunities for further Australian research in precision machining by creating a foundation for extending the technology to more complex manufacturing processes.Read moreRead less
Interface Engineering of Multilayer Nanostructures. Nanostructured multilayers can outperform coatings of their constituent layers in both hardness and strength. It is believed that the nature of interfaces in these materials is critical since they mediate dislocation motion and crack propagation. This project will use advanced synthesis, microanalysis and theoretical methods to investigate multilayer coatings with sharp, diffuse and rough interfaces in order to reveal their failure mechanisms u ....Interface Engineering of Multilayer Nanostructures. Nanostructured multilayers can outperform coatings of their constituent layers in both hardness and strength. It is believed that the nature of interfaces in these materials is critical since they mediate dislocation motion and crack propagation. This project will use advanced synthesis, microanalysis and theoretical methods to investigate multilayer coatings with sharp, diffuse and rough interfaces in order to reveal their failure mechanisms under stress. This will enable us to understand the principles required to design the strongest structures and facilitate the selection of materials and deposition parameters in order to produce coatings optimised for a range of demanding applications.Read moreRead less