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Design of a Miniature Pressure Regulator for use with a Pneumatically Actuated Artificial Arm

This project aims to design a small and lightweight pressure regulator for use with an Air Muscle in an autonomous application. The current limitations of pressure regulators are addressed and simulations in Matlab are performed to optimize the design.

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Design of a Miniature Pressure Regulator for use with a Pneumatically Actuated Artificial Arm

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  1. Design of a Miniature Pressure Regulator for use with a Pneumatically Actuated Artificial Arm Suzanne Lochert a1078416 Supervisors: Frank Wornle George Osborne

  2. Overview • Introduction • Aims of the Project • Current Limitations of Regulators • The Design • Benefits of the Design • Matlab Simulations • Future Work • Conclusions

  3. Introduction • A pressure regulator is used for Pneumatic applications • A regulator reduces pressure and also regulates it • For this application the pressure entering the Air Muscle needs to be controlled • Wide Variety of Pressure Regulators • Spring or Weight Loaded • Single or Multiple Diaphragms • Pilot operated pressure regulator Popeck, 2001 Gas and Fuel corporation of Victoria (GFCV), 1976

  4. Aims of the Project • Create a miniature pressure regulator • This regulator is to be used with the Air Muscle to allow applications to be autonomous • This requires • a portable air supply • a small and lightweight regulator The Air Muscle developed at the University of Adelaide, photo Suzanne Lochert, 2005

  5. Current Limitations of Pressure Regulators • Size of Regulators • Inability to • Vary outlet pressure • Handle large pressures • Reduce the pressure sufficiently • Hence current regulators do not meet specifications for project Photo Suzanne Lochert 2005, Regulator courtesy of Mick Irvine, Office of the Technical Regulator

  6. The Design

  7. Benefits of the Design • Spring Loaded* • Single diaphragm • Safety pressure relief* • Valve positioning system • Ease of Assembly *Gas and Fuel corporation of Victoria (GFCV), 1976

  8. Matlab Simulations • A static model of the system was created using an m-file and simulink to determine system parameters • A dynamic simulation of the system was then created using information from the static model and modelled in Simulink Dynamic model of Regulator with no disturbance Dynamic model of Regulator with a disturbance

  9. Future Work • The regulator once manufactured will be tested • These tests will be based on tests from Australian Standards • The regulator will then be utilised for applications using the Air Muscle

  10. Conclusions • The Miniature Pressure Regulator has been designed by combining aspects of available regulators to be the optimal design for this application • The simulations performed using Matlab helped to optimise the design of the pressure regulator

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