All Outputs (219)

Robust FDI for FTC coordination in a distributed network system (2008)
Journal Article
Klinkhieo, S., Patton, R. J., & Kambhampati, C. (2008). Robust FDI for FTC coordination in a distributed network system. IFAC Proceedings Volumes/ International Federation of Automatic Control, 41(2), 13551-13556. https://doi.org/10.3182/20080706-5-KR-1001.0468

This paper focuses on the development of a suitable Fault Detection and Isolation (FDI) strategy for application to a system of inter-connected and distributed systems, as a basis for a fault-tolerant Network Control System (NCS) problem. The work fo... Read More about Robust FDI for FTC coordination in a distributed network system.

Comparison of energy harvesting systems for wireless sensor networks (2008)
Journal Article
Balouchi, F., & Gilbert, J. M. (2008). Comparison of energy harvesting systems for wireless sensor networks. International Journal of Automation and Computing, 5(4), 334-347. https://doi.org/10.1007/s11633-008-0334-2

Wireless sensor networks (WSNs) offer an attractive solution to many environmental, security, and process monitoring problems. However, one barrier to their fuller adoption is the need to supply electrical power over extended periods of time without... Read More about Comparison of energy harvesting systems for wireless sensor networks.

Management of spatial and temporal thermal dynamics using TLM (2008)
Journal Article
Koay, A. L., Wilkinson, A. J., & Pulko, S. H. (2008). Management of spatial and temporal thermal dynamics using TLM. International journal of numerical modelling, 21(6), 591-606. https://doi.org/10.1002/JNM.701

The design of a preliminary spatial thermal control algorithm is described. This is based on the traditional state-space servo design and exploits the analogy between the transmission line matrix (TLM) method and state-space. The TLM algorithm involv... Read More about Management of spatial and temporal thermal dynamics using TLM.

Reliable fault diagnosis scheme for a spacecraft attitude control system (2008)
Journal Article
Patton, R. J., Uppal, F. J., Simani, S., & Polle, B. (2008). Reliable fault diagnosis scheme for a spacecraft attitude control system. Proceedings of the Institution of Mechanical Engineers. Part O, Journal of risk and reliability, 222(2), 139-152. https://doi.org/10.1243/1748006xjrr98

This paper presents a scheme for fault detection and isolation (FDI) of on-board gyroscope sensors and thrusters for spacecraft attitude control, based on the example of the Mars Express (MEX) satellite. The main contribution of the paper is related... Read More about Reliable fault diagnosis scheme for a spacecraft attitude control system.

TLM nodal state estimator: an alternative method of initializing a two-dimensional diffusion model (2008)
Journal Article
Koay, A. L., Wilkinson, A. J., & Pulko, S. H. (2008). TLM nodal state estimator: an alternative method of initializing a two-dimensional diffusion model. International journal of numerical modelling, 21(5), 351-368. https://doi.org/10.1002/jnm.677

The transmission line matrix (TLM) method is an established technique for modelling thermal transients in heat transfer systems. However, initial and boundary conditions have always been slightly problematic, particularly when the boundary condition... Read More about TLM nodal state estimator: an alternative method of initializing a two-dimensional diffusion model.

A generic strategy for fault-tolerance in control systems distributed over a network (2007)
Journal Article
Patton, R. J., Kambhampati, C., Casavola, A., Zhang, P., Ding, S., & Sauter, D. (2007). A generic strategy for fault-tolerance in control systems distributed over a network. European journal of control / EUCA, European Control Association, 13(2-3), 280-296. https://doi.org/10.3166/ejc.13.280-296

This paper provides a tutorial overview, of a number of aspects and approaches to Control over the Network for Network Control Systems (NCS) that are likely to lead to good fault-tolerant control properties, subject to network faults. In order to ana... Read More about A generic strategy for fault-tolerance in control systems distributed over a network.

Accurate quantification of the influence of benthic macro- and meio-fauna on the geometric properties of estuarine muds by micro computer tomography (2007)
Journal Article
Mazik, K., Curtis, N., Fagan, M. J., Taft, S., & Elliott, M. (2008). Accurate quantification of the influence of benthic macro- and meio-fauna on the geometric properties of estuarine muds by micro computer tomography. Journal of experimental marine biology and ecology, 354(2), 192-201. https://doi.org/10.1016/j.jembe.2007.11.006

This paper describes the novel application of high resolution micro computer tomography (microCT) to the quantification of the properties of marine biogenic structures. CT scanning has been used to examine sediments in the past but the resolution of... Read More about Accurate quantification of the influence of benthic macro- and meio-fauna on the geometric properties of estuarine muds by micro computer tomography.

Conduction-band crossover induced by misfit strain in InSb/GaSb self-assembled quantum dots (2007)
Journal Article
Rybchenko, S. I., Gupta, R., Lai, K. T., Itskevich, I. E., Haywood, S. K., Tasco, V., Deguffroy, N., Baranov, A. N., & Tournié, E. (2007). Conduction-band crossover induced by misfit strain in InSb/GaSb self-assembled quantum dots. Physical review B: Condensed matter and materials physics, 76(19), 0 - 0. https://doi.org/10.1103/physrevb.76.193309

We address the occurrence of conduction-band crossover in III-V self-assembled quantum dots solely due to misfit strain. Band structure analysis in terms of standard deformation-potential theory shows that Γ-X crossover can occur in the dot, while bo... Read More about Conduction-band crossover induced by misfit strain in InSb/GaSb self-assembled quantum dots.

Estimating the scaling of rain rate moments from radar and rain gauge (2007)
Journal Article
Paulson, K. S., & Zhang, X. (2007). Estimating the scaling of rain rate moments from radar and rain gauge. Journal of Geophysical Research: Atmospheres, 112(20), Article D20107. https://doi.org/10.1029/2007JD008547

Rain rate is a physical parameter that is only defined over some spatial or spatial-temporal integration volume. The moments of rain rate fields calculated from measurements derived from integration volumes of the same shape and a range of sizes are... Read More about Estimating the scaling of rain rate moments from radar and rain gauge.

Fault diagnosis of an industrial gas turbine prototype using a system identification approach (2007)
Journal Article
Simani, S., & Patton, R. J. (2008). Fault diagnosis of an industrial gas turbine prototype using a system identification approach. Control engineering practice, 16(7), 769-786. https://doi.org/10.1016/j.conengprac.2007.08.009

In this work, a model-based procedure exploiting analytical redundancy for the detection and isolation of faults on a gas turbine simulated process is presented. The main point of the paper consists of exploiting an identification scheme in connectio... Read More about Fault diagnosis of an industrial gas turbine prototype using a system identification approach.

An interaction predictive approach to fault-tolerant control in network control systems (2007)
Journal Article
Kambhampati, C., Perkgoz, C., Patton, R. J., & Ahamed, W. (2007). An interaction predictive approach to fault-tolerant control in network control systems. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 221(6), 885-894. https://doi.org/10.1243/09596518jsce377

This paper illustrates some of the capabilities of previously proposed network control system (NCS) architectures to carry on functioning in the event of faults, without recourse to system reconfiguration. The principle of interaction prediction is u... Read More about An interaction predictive approach to fault-tolerant control in network control systems.

Midinfrared photoluminescence and compositional modulation in pentanary GaInAsPSb alloys grown by liquid phase epitaxy (2007)
Journal Article
Krier, A., Smirnov, V. M., Batty, P. J., Yin, M., Lai, K. T., Rybchenko, S., Haywood, S. K., Vasil'ev, V. I., Gagis, G. S., & Kuchinskii, V. I. (2007). Midinfrared photoluminescence and compositional modulation in pentanary GaInAsPSb alloys grown by liquid phase epitaxy. Applied physics letters, 91(8), 082102. https://doi.org/10.1063/1.2768892

Room temperature photoluminescence is reported from GaInAsSbP pentanary alloys grown by liquid phase epitaxy on GaSb. The epitaxial layers exhibited emission in the midinfrared between 3 and 4 μm. Investigation of the structural and photoluminescence... Read More about Midinfrared photoluminescence and compositional modulation in pentanary GaInAsPSb alloys grown by liquid phase epitaxy.

Importance of aspect ratio over shape in determining the quantization potential of self-assembled zinc-blende III-V quantum dots (2007)
Journal Article
Rybchenko, S. I., Yeap, G., Gupta, R., Itskevich, I. E., & Haywood, S. K. (2007). Importance of aspect ratio over shape in determining the quantization potential of self-assembled zinc-blende III-V quantum dots. Journal of applied physics, 102(1), 013706. https://doi.org/10.1063/1.2752127

We have studied the effect of shape on the strain-modified electron/hole confinement potential in zinc-blende quantum dots (QDs), using standard deformation potential theory and an anisotropic continuum-elasticity approximation. Calculations were per... Read More about Importance of aspect ratio over shape in determining the quantization potential of self-assembled zinc-blende III-V quantum dots.

Development of a (silent) speech recognition system for patients following laryngectomy (2007)
Journal Article
Fagan, M. J., Ell, S. R., Gilbert, J. M., Sarrazin, E., & Chapman, P. M. (2008). Development of a (silent) speech recognition system for patients following laryngectomy. Medical engineering & physics, 30(4), 419-425. https://doi.org/10.1016/j.medengphy.2007.05.003

Surgical voice restoration post-laryngectomy has a number of limitations and drawbacks. The present gold standard involves the use of a tracheo-oesophageal fistula (TOF) valve to divert air from the lungs into the throat, which vibrates, and from thi... Read More about Development of a (silent) speech recognition system for patients following laryngectomy.

Design of electronic systems based on functional capability (2007)
Journal Article
Gilbert, J. M. (2008). Design of electronic systems based on functional capability. Quality and Reliability Engineering International, 24(1), 3-21. https://doi.org/10.1002/qre.856

An important measure of design quality is the extent to which a circuit design is able to meets its specification in the presence of component parameter variations. Of equal importance is knowing how to improve this capability most effectively. This... Read More about Design of electronic systems based on functional capability.

On natural frequencies and eigenmodes of a linear vibration system (2007)
Journal Article
Müller, P. C., & Hou, M. (2007). On natural frequencies and eigenmodes of a linear vibration system. ZAMM, 87(5), 348-351. https://doi.org/10.1002/zamm.200610319

For conservative linear chain-structured mass-spring vibration systems with n degrees of freedom, the conjecture of Mikota [1] on the natural frequencies is verified. In addition, the eigenvalue/eigenvector problem of a related square root matrix is... Read More about On natural frequencies and eigenmodes of a linear vibration system.

Downscaling of rain gauge time series by multiplicative beta cascade (2007)
Journal Article
Baxter, P. D., & Paulson, K. S. (2007). Downscaling of rain gauge time series by multiplicative beta cascade. Journal of Geophysical Research: Atmospheres, 112(D9), Article ARTN D09105. https://doi.org/10.1029/2006JD007333

This paper develops a downscaling algorithm capable of producing ensembles of rain rate time series, with integration times as short as 10 s, consistent with a time series of rain rates with integration times as long as 6 hours. The algorithm is base... Read More about Downscaling of rain gauge time series by multiplicative beta cascade.

Estimation of sinusoidal frequencies and amplitudes using adaptive identifier and observer (2007)
Journal Article
Hou, M. (2007). Estimation of sinusoidal frequencies and amplitudes using adaptive identifier and observer. IEEE transactions on automatic control, 52(3), 493-499. https://doi.org/10.1109/TAC.2006.890389

A simple method is proposed for estimation of amplitudes of multiple sinusoids. The estimation is based on the existing adaptive identifier which offers the globally convergent estimate of sinusoidal frequencies. To deal with possible singularities o... Read More about Estimation of sinusoidal frequencies and amplitudes using adaptive identifier and observer.

Diversity improvement estimation from rain radar databases using maximum likelihood estimation (2006)
Journal Article
Paulson, K. S., Watson, R. J., & Usman, I. S. (2006). Diversity improvement estimation from rain radar databases using maximum likelihood estimation. IEEE Transactions on Antennas and Propagation, 54(1), 168-174. https://doi.org/10.1109/TAP.2005.861571

This research examines route diversity as a fade mitigation technique in the presence of rain, for terrestrial microwave links. The improvement in availability due to diversity depends upon the complex spatio-temporal properties of rainfall. To produ... Read More about Diversity improvement estimation from rain radar databases using maximum likelihood estimation.

Effect of interface passivation on the magnetoresistance of granular magnetite Fe3(1-δ)O4 (2006)
Journal Article
Rybchenko, S. I., Fujishiro, Y., Takagi, H., & Awano, M. (2006). Effect of interface passivation on the magnetoresistance of granular magnetite Fe3(1-δ)O4. Applied physics letters, 89(13), Article 132509. https://doi.org/10.1063/1.2357581

The reductive passivation of granular interface was proposed to enhance the tunneling magnetoresistance of bulk granular magnetite. For this, an annealing in paraffin wax has been applied. As a result, the low-field magnetoresistance response was inc... Read More about Effect of interface passivation on the magnetoresistance of granular magnetite Fe3(1-δ)O4.