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14. State estimation of in-flight aircraft centre of gravity

Author

Stanley, Andrew

Subjects
629.13
Abstract

For all types of aircraft (civil, military, manned, unmanned) the aircraft designer specifies a safe range for the centre of gravity (cg) of the aircraft and designs the aircraft to operate safely within these limits. Changes to the cg may affect aircraft stability, performance and fuel economy so it is an important system parameter. Changes to the in-flight cg position have traditionally been estimated by calculating fuel burn and from that calculating the change in weight and hence change in cg. Other techniques to estimate in-flight aircraft cg are included in the literature review. The motivation for additional cg estimation techniques arise from the potential benefits they offer to a Flight Control System (FCS). These benefits include the potential for improved fault detection and an improved FCS design with better aircraft performance and fuel economy. State estimation using Kalman filters has been used since the 1960 s in many fields of application including the aerospace industry. This thesis will introduce the concept of using state estimation to detect the unexpected angular acceleration associated with a cg change. This state estimation concept is applied to a linear Phantom aircraft model and then to a complex non-linear aircraft model of a delta-canard military aircraft, called ADMIRE. The most common state estimation approach used with non-linear systems is the Extended Kalman Filter (EKF), but an alternative approach is proposed in which the pitching and roll moment coefficient derivatives are selectively modified based upon the aircraft angle of attack, speed and altitude. Both longitudinal and lateral cg estimators are described and examples of their performance are provided and compared with an EKF version of the estimator. A discrete version of the estimator is also described and used with a hardware fuel rig. Faults are applied to the fuel rig and it is proposed that the estimator could aid the fault diagnosis. In a real implementation the aircraft will not be precisely modelled, therefore a sequence of robustness tests are included to identify the critical aircraft parameters affecting the estimator. The results show that a cg estimator based upon a Kalman filter, and using a selective coefficient correction approach, can satisfy the performance requirements specified by the industrial sponsor, BAE Systems.

Published
2011

15. A comparison of eight optimization methods applied to a wind farm layout optimization problem

Author

Thomas, Jared J., primary, Baker, Nicholas F., additional, Malisani, Paul, additional, Quaeghebeur, Erik, additional, Sanchez Perez-Moreno, Sebastian, additional, Jasa, John, additional, Bay, Christopher, additional, Tilli, Federico, additional, Bieniek, David, additional, Robinson, Nick, additional, Stanley, Andrew P. J., additional, Holt, Wesley, additional, and Ning, Andrew, additional

Published
2023
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25. Integration of a Particle Jamming Tactile Display with a Cable-Driven Parallel Robot

Author

Stanley, Andrew A., Mayhew, David, Irwin, Rikki, Okamura, Allison M., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Auvray, Malika, editor, and Duriez, Christian, editor

Published
2014
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28. A Comparison of Eight Optimization Methods Applied to a Wind Farm Layout Optimization Problem

Author

Thomas, Jared J., primary, Baker, Nicholas F., additional, Malisani, Paul, additional, Quaeghebeur, Erik, additional, Perez-Moreno, Sebastian Sanchez, additional, Jasa, John, additional, Bay, Christopher, additional, Tilli, Federico, additional, Bieniek, David, additional, Robinson, Nick, additional, Stanley, Andrew P. J., additional, Holt, Wesley, additional, and Ning, Andrew, additional

Published
2022
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32. Multi-Timescale Wind-Based Hybrid Energy Systems

Author

Stanley, Andrew P. J., primary, King, Jennifer, additional, Barker, Aaron, additional, Guittet, Darice, additional, Hamilton, William, additional, Bay, Christopher, additional, Fleming, Paul, additional, and Sinner, Michael, additional

Published
2022
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33. Composting

Author

Stanley, Andrew and Turner, Geraldine

Abstract

Composting can provide both a means of managing organic waste, and a vehicle to teach Science at all levels of schooling. In response to a local organic waste issue a process has been developed to compost waste from an olive oil press and analyse the resultant compost. In this article, the composting process is described in a manner that can be effectively used in the classroom, along with the findings of our research into successfully composting the olive waste. This process has the potential to be applied to many other forms of organic waste generated by schools. A series of experiments to evaluate the quality of the product based on the Australian Standards for Compost have also been developed. These experiments have been designed to provide students with a series of tools that they can use in the development of their own scientific investigations into compost. (Contains 2 tables and 1 figure.)

Published
2010

43. Clinical Outcomes and Survival Following Treatment of Metastatic Castrate-Refractory Prostate Cancer With Docetaxel Alone or With Strontium-89, Zoledronic Acid, or Both: The TRAPEZE Randomized Clinical Trial

Author

James, Nicholas D., Pirrie, Sarah J., Pope, Ann M., Barton, Darren, Andronis, Lazaros, Goranitis, Ilias, Collins, Stuart, Daunton, Adam, McLaren, Duncan, O’Sullivan, Joe, Parker, Christopher, Porfiri, Emilio, Staffurth, John, Stanley, Andrew, Wylie, James, Beesley, Sharon, Birtle, Alison, Brown, Janet, Chakraborti, Prabir, Hussain, Syed, Russell, Martin, and Billingham, Lucinda J.

Published
2016
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