Shape adaptive structures with built-in compact smart material based actuators. Primary Australian aerospace manufacturers are sub-contractors and constantly compete in the global market. Their products are primarily control surfaces, e.g., Boeing 757 and 777 rudders, 737 Krueger flaps. In light of the development of the hingeless control surfaces (HCS) in the smart aircraft wing program in the USA, the economic benefits of this project are very high because (a) it will address the key technolo ....Shape adaptive structures with built-in compact smart material based actuators. Primary Australian aerospace manufacturers are sub-contractors and constantly compete in the global market. Their products are primarily control surfaces, e.g., Boeing 757 and 777 rudders, 737 Krueger flaps. In light of the development of the hingeless control surfaces (HCS) in the smart aircraft wing program in the USA, the economic benefits of this project are very high because (a) it will address the key technological issue identified in the HCS program; and (b) it will enhance Australian manufacturers¡¯ technological standing and input in the design and manufacturing of next generation HCS by providing highly trained people with world-leading niche technology.Read moreRead less
Active shape control of large thin-walled structures using ferroelectric single crystals. Ferroelectric single crystals were invented 5 years ago, and they possess many superior properties compared to conventional piezoelectric materials, particularly the induced strain up to 1.5%, an order higher than conventional materials. This project aims to poineer the application of these new and powerful smart materials as actuators and sensors to shape control of smart structures. The expected outcome ....Active shape control of large thin-walled structures using ferroelectric single crystals. Ferroelectric single crystals were invented 5 years ago, and they possess many superior properties compared to conventional piezoelectric materials, particularly the induced strain up to 1.5%, an order higher than conventional materials. This project aims to poineer the application of these new and powerful smart materials as actuators and sensors to shape control of smart structures. The expected outcomes are (a) a new constitutive theory for the non-linear behaviour of ferroelectric single crystals; (b) a novel definition and formulation for the shape control problem; and (c) an innovative theoretical framework for design optimization of shape control of smart structures using ferroelectric single crystals.Read moreRead less
Morphing flexible structures with lead lanthanum zirconium titanate (PLZT) based optical actuators. Lead lanthanum zirconate titanate (PLZT) materials yield mechanical strains when exposed to near ultraviolet light as a result of combined photovoltaic and converse piezoelectric effects. They offer actuation strain on par with piezoelectric materials and other advantages, such as wireless light-to-mechanical energy transfer, immunity from electrical and magnetic disturbances and fast response wi ....Morphing flexible structures with lead lanthanum zirconium titanate (PLZT) based optical actuators. Lead lanthanum zirconate titanate (PLZT) materials yield mechanical strains when exposed to near ultraviolet light as a result of combined photovoltaic and converse piezoelectric effects. They offer actuation strain on par with piezoelectric materials and other advantages, such as wireless light-to-mechanical energy transfer, immunity from electrical and magnetic disturbances and fast response with the transparent electrode design. This project aims to pioneer the application of PLZT optical actuators in morphing flexible structures leading to development of wireless smart structures technology and opt-electromechanical systems such as medical instruments.Read moreRead less
Fluid-structural interactions in high-speed flows. This project aims to perform experiments to measure fluid-structure interaction in hypersonic flows. The work will improve the accuracy of simulation tools that are urgently required to aid industry in the design of more structurally efficient and robust high-speed vehicles. These tools will in turn be used to reveal the underlying physics of the fluid-structure interactions and establish the relative significance of the driving parameters. Accu ....Fluid-structural interactions in high-speed flows. This project aims to perform experiments to measure fluid-structure interaction in hypersonic flows. The work will improve the accuracy of simulation tools that are urgently required to aid industry in the design of more structurally efficient and robust high-speed vehicles. These tools will in turn be used to reveal the underlying physics of the fluid-structure interactions and establish the relative significance of the driving parameters. Accurate prediction of the behaviour and lifetime of structural components subject to these fluid-structural interactions, in which the deformation of the structure induced by the local flow field, can in turn influence this flow field. This coupling can result in damage or even catastrophic structural failure and thus robust design tools must be developed to avoid this.Read moreRead less
Controlled vibration of intelligent super-lightweight structure systems. This project aims to poineer research on dynamic shape control of intelligent structure systems, in which the rapid shape variation of a structure is controlled with fast varying electric energy. It bridges the gap between structural shape and vibration control. The expected outcomes are (a) novel concepts and formulation of dynamic shape control; (b) biologically inspired active stiffener system; and (c) an innovative th ....Controlled vibration of intelligent super-lightweight structure systems. This project aims to poineer research on dynamic shape control of intelligent structure systems, in which the rapid shape variation of a structure is controlled with fast varying electric energy. It bridges the gap between structural shape and vibration control. The expected outcomes are (a) novel concepts and formulation of dynamic shape control; (b) biologically inspired active stiffener system; and (c) an innovative theoretical framework for design optimization of dynamic shape control of intelligent structure systems.
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Active and Passive Techniques of Shock Wave/Boundary Layer Interaction Control. The shock wave/ boundary layer interaction (SBLI) is a formidable problem in high-speed aerodynamics. We investigate a novel method, using piezoelectric flap actuators to control the interaction. The aim is to participate in an experimental programme on SBLI control using longitudinal slots at The University of Cambridge's Engineering Department, a leading international institution for SBLI control. Their longitudina ....Active and Passive Techniques of Shock Wave/Boundary Layer Interaction Control. The shock wave/ boundary layer interaction (SBLI) is a formidable problem in high-speed aerodynamics. We investigate a novel method, using piezoelectric flap actuators to control the interaction. The aim is to participate in an experimental programme on SBLI control using longitudinal slots at The University of Cambridge's Engineering Department, a leading international institution for SBLI control. Their longitudinal slot control is very similar to unimorph control so that this research can be used to improve the understanding of unimorph control. Furthermore, their CFD program can validate our past work and allow theoretical optimisation to create a smart flap system.Read moreRead less
High-Bandwidth Control and Advanced Dynamic Modelling for Unmanned Helicopters. Advanced control theory will be applied to enable precise control of unmanned helicopters in the presence of disturbances. This is critical for: operating unmanned helicopters among the buildings of urban environments, reconnaissance, investigating dangerous areas, pursuit of targets, and many other desirable capabilities for law enforcement and military purposes. The ability of a small RUAV to launch and recover to ....High-Bandwidth Control and Advanced Dynamic Modelling for Unmanned Helicopters. Advanced control theory will be applied to enable precise control of unmanned helicopters in the presence of disturbances. This is critical for: operating unmanned helicopters among the buildings of urban environments, reconnaissance, investigating dangerous areas, pursuit of targets, and many other desirable capabilities for law enforcement and military purposes. The ability of a small RUAV to launch and recover to a moving vessel would significantly enhance operational possibilities for border protection tasks and the Australian Defence Force. The research has direct application to other mechanical systems such as underwater vehicles, mobile robots, and precision control of agricultural vehicles, overhead cranes, and mining equipment.Read moreRead less
Thermoforming Mechanisms for Cost-effective Manufacturing of Advanced Composite Structures. The cost barrier in thermoforming, due to the lack of understanding of shear deformation and wrinkling, has inhibited the large-scale application of fibre-reinforced composite structures in aerospace and automobile industries. This project aims to develop a cost-effective diaphragm thermoforming process through an in-depth understanding of the thermoforming mechanisms. The outcomes will include novel theo ....Thermoforming Mechanisms for Cost-effective Manufacturing of Advanced Composite Structures. The cost barrier in thermoforming, due to the lack of understanding of shear deformation and wrinkling, has inhibited the large-scale application of fibre-reinforced composite structures in aerospace and automobile industries. This project aims to develop a cost-effective diaphragm thermoforming process through an in-depth understanding of the thermoforming mechanisms. The outcomes will include novel theories for thermoforming, a standard method for material property characterization and new finite element models compatible with the most popular software available for industry. The project will form the basis for establishing the effective production window and enhance greatly the competitive edge of the Australian manufacturing industry.Read moreRead less
Automated helicopter hover and recovery system for operations at sea. The small size and simplicity of the integrated system outlined in this project will significantly improve the effectiveness of maritime surveillance for homeland security whilst enabling substantially lower operational costs. The proposal aims to develop control and sensing techniques, enabling small rotary wing unmanned air-vehicles (UAVs) weighing less than 100 kgs to operate from small-size vessels. This will be achieved ....Automated helicopter hover and recovery system for operations at sea. The small size and simplicity of the integrated system outlined in this project will significantly improve the effectiveness of maritime surveillance for homeland security whilst enabling substantially lower operational costs. The proposal aims to develop control and sensing techniques, enabling small rotary wing unmanned air-vehicles (UAVs) weighing less than 100 kgs to operate from small-size vessels. This will be achieved by resolving the current lack of integration between ship motion and the unmanned vehicle guidance systems. The proposed research will make substantial contributions in areas of ship motion prediction and sensing and hover control of tethered and non-tethered small helicopters.
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Onset Theory: Pushing the design envelope for textile composite structures. This study aims to exploit an innovative physics-based approach to predict the strength of textile composites. This is particularly important in areas such as aircraft design, where drastic weight savings are needed to allow designers to remain competitive in a low-carbon future. Improved theory and design tools will remove conservatism and account for a large part of these weight savings. The new approach is the first t ....Onset Theory: Pushing the design envelope for textile composite structures. This study aims to exploit an innovative physics-based approach to predict the strength of textile composites. This is particularly important in areas such as aircraft design, where drastic weight savings are needed to allow designers to remain competitive in a low-carbon future. Improved theory and design tools will remove conservatism and account for a large part of these weight savings. The new approach is the first to be consistent at all length scales — from atoms to aeroplanes — ensuring relevance for new and evolving composite material systems. A novel understanding of crack initiation in textile laminates is intended to reduce design and certification effort for new aircraft and help to design more efficient airframes at a lower cost.Read moreRead less