Skip to main content

Research Repository

Advanced Search

All Outputs (215)

A phase modulation-based ultrasonic communication system using Variable Structure Control (2010)
Presentation / Conference Contribution
Ma, S., Wilkinson, A. J., & Paulson, K. S. A phase modulation-based ultrasonic communication system using Variable Structure Control. Presented at 2010 IEEE 12th International Conference on Communication Technology

Narrow bandwidth transducers used in existing ultrasonic data communication systems are known to be devices with a high Q resonant response and low coupling to both the electrical drive and acoustic output interfaces. These features limit the speed o... Read More about A phase modulation-based ultrasonic communication system using Variable Structure Control.

Isolated word recognition of silent speech using magnetic implants and sensors (2010)
Journal Article
Gilbert, J. M., Rybchenko, S. I., Hofe, R., Ell, S. R., Fagan, M. J., Moore, R. K., & Green, P. (2010). Isolated word recognition of silent speech using magnetic implants and sensors. Medical engineering & physics, 32(10), 1189-1197. https://doi.org/10.1016/j.medengphy.2010.08.011

There are a number of situations where individuals wish to communicate verbally but are unable to use conventional means so called 'silent speech'. These include speakers in noisy and covert situations as well as patients who have lost their voice as... Read More about Isolated word recognition of silent speech using magnetic implants and sensors.

Robust FDI applied to thruster faults of a satellite system (2010)
Journal Article
Patton, R. J., Polle, B., Simani, S., & Uppal, F. J. (2010). Robust FDI applied to thruster faults of a satellite system. Control engineering practice, 18(9), 1093-1109. https://doi.org/10.1016/j.conengprac.2009.04.011

This paper presents a practical solution to the problem of robust fault detection and isolation (FDI) for faults affecting the thrusters of a satellite system Mars Express (MEX). A non-linear model of MEX is used and the system is considered in the p... Read More about Robust FDI applied to thruster faults of a satellite system.

Modeling of intraband absorption for quantum dot-in-well structures with low computational cost (2010)
Journal Article
Hong, B. H., Rybchenko, S. I., Itskevich, I. E., Haywood, S. K., Tan, C. H., Vines, P., & Hugues, M. (2010). Modeling of intraband absorption for quantum dot-in-well structures with low computational cost. Journal of Physics: Conference Series, 242(1), Article 012013. https://doi.org/10.1088/1742-6596/242/1/012013

Much effort has been committed to development of quantum-dot-based infrared photodetectors owing to their potential for normal-incidence absorption and low dark current.Quantum-dot-in-well structures offer additional advantages, such as better wavele... Read More about Modeling of intraband absorption for quantum dot-in-well structures with low computational cost.

Friction compensation as a fault-tolerant control problem (2010)
Journal Article
Patton, R. J., Putra, D., & Klinkhieo, S. (2010). Friction compensation as a fault-tolerant control problem. International Journal of Systems Science, 41(8), 987-1001. https://doi.org/10.1080/00207720903434797

The control of systems that involve friction presents interesting challenges. Recent research has focused on detailed modelling of friction phenomena in order to use robust on-line friction compensation procedures, attempting to cancel out the fricti... Read More about Friction compensation as a fault-tolerant control problem.

Review of high level fault modeling approaches for mixed-signal systems (2010)
Journal Article
Xia, L., Wilkinson, A., & Bell, I. (2010). Review of high level fault modeling approaches for mixed-signal systems. Journal of Electronics (China), 27(4), 490-497. https://doi.org/10.1007/s11767-011-0350-1

In the modern analogue design, Transistor Level Fault Simulation (TLFS) plays the importantpart since every fault in the whole circuit has to be simulated at that level. Unfortunately, it isa very CPU intensive task even though it maintains the high... Read More about Review of high level fault modeling approaches for mixed-signal systems.

Automated model generation algorithm for high-level fault modeling (2010)
Journal Article
Xia, L., Wilkinson, A. J., & Bell, I. M. (2010). Automated model generation algorithm for high-level fault modeling. IEEE transactions on computer-aided design of integrated circuits and systems, 29(7), 1140-1145. https://doi.org/10.1109/TCAD.2010.2045556

High-level modeling for operational amplifiers (opamps) has been previously carried out successfully using models generated by published automated model generation approaches. Furthermore, high-level fault modeling (HLFM) has been shown to work reaso... Read More about Automated model generation algorithm for high-level fault modeling.

Trends in the incidence of rain rates associated with outages on fixed links operating above 10 GHz in the southern United Kingdom (2010)
Journal Article
Paulson, K. S. (2010). Trends in the incidence of rain rates associated with outages on fixed links operating above 10 GHz in the southern United Kingdom. Radio science, 45(1), 1-9. https://doi.org/10.1029/2009rs004193

Studies have shown that climate change is leading to an increase in the incidence of heavy rain in the United Kingdom, particularly over winter. The major interest has been on the hydrological impacts of this increase, and so studies have focused on... Read More about Trends in the incidence of rain rates associated with outages on fixed links operating above 10 GHz in the southern United Kingdom.

Strained arrays of colloidal nanoparticles: Conductance and magnetoresistance enhancement (2009)
Journal Article
Rybchenko, S. I., Dyab, A. K. F., Haywood, S. K., Itskevich, I. E., & Paunov, V. N. (2009). Strained arrays of colloidal nanoparticles: Conductance and magnetoresistance enhancement. Nanotechnology, 20(42), Article ARTN 425607. https://doi.org/10.1088/0957-4484/20/42/425607

Colloidal nanoparticles are very popular as building blocks of functional arrays for electronic and optical applications. However, there is a problem in achieving electrical conductivity in such nanoarrays due to their molecular shells. These shells,... Read More about Strained arrays of colloidal nanoparticles: Conductance and magnetoresistance enhancement.

Silent speech interfaces (2009)
Journal Article
Denby, B., Schultz, T., Honda, K., Hueber, T., Gilbert, J. M., & Brumberg, J. S. (2010). Silent speech interfaces. Speech communication, 52(4), 270-287. https://doi.org/10.1016/j.specom.2009.08.002

The possibility of speech processing in the absence of an intelligible acoustic signal has given rise to the idea of a 'silent speech' interface, to be used as an aid for the speech-handicapped, or as part of a communications system operating in sile... Read More about Silent speech interfaces.

Simulation of rain fade on arbitrary microwave link networks by the downscaling and interpolation of rain radar data (2009)
Journal Article
Paulson, K., & Zhang, X. (2009). Simulation of rain fade on arbitrary microwave link networks by the downscaling and interpolation of rain radar data. Radio science, 44(2), 0 - 0. https://doi.org/10.1029/2008RS003935

To predict the Quality of Service at a node in heterogeneous networks of line-of-sight, terrestrial, microwave links requires knowledge of the spatial and temporal statistics of rain over scales of a few meters to tens or hundreds of kilometers, and... Read More about Simulation of rain fade on arbitrary microwave link networks by the downscaling and interpolation of rain radar data.

Applicability of the kp method to modeling of InAs/GaSb short-period superlattices (2009)
Journal Article
Hong, B. H., Rybchenko, S. I., Itskevich, I. E., Haywood, S. K., Intartaglia, R., Tasco, V., Rainò, G., & De Giorgi, M. (2009). Applicability of the kp method to modeling of InAs/GaSb short-period superlattices. Physical review B: Condensed matter and materials physics, 79(16), 165323-1-165323-4. https://doi.org/10.1103/PhysRevB.79.165323

We investigate the long-standing controversy surrounding modeling of the electronic spectra of InAs/GaSb short-period superlattices (SPSLs). Most commonly, such modeling for semiconductor heterostructures is based on the kp method. However, this meth... Read More about Applicability of the kp method to modeling of InAs/GaSb short-period superlattices.

Type-II InAsxSb1-x/InAs quantum dots for midinfrared applications: Effect of morphology and composition on electronic and optical properties (2009)
Journal Article
Yeap, G. H., Rybchenko, S. I., Itskevich, I. E., & Haywood, S. K. (2009). Type-II InAsxSb1-x/InAs quantum dots for midinfrared applications: Effect of morphology and composition on electronic and optical properties. Physical review B: Condensed matter and materials physics, 79(7), 075305-1-075305-6. https://doi.org/10.1103/physrevb.79.075305

InSb-based self-assembled quantum dots are very promising for the midinfrared (3-5μm) optical range. We have analyzed the effect of geometry and composition on the electronic structure and optical spectra of InAsx Sb1-x /InAs dots. The calculated tra... Read More about Type-II InAsxSb1-x/InAs quantum dots for midinfrared applications: Effect of morphology and composition on electronic and optical properties.

L-band-related interband transition in InSb/GaSb self-assembled quantum dots (2008)
Book Chapter
Rybchenko, S. I., Gupta, R., Itskevich, I. E., & Haywood, S. K. (2008). L-band-related interband transition in InSb/GaSb self-assembled quantum dots. In Springer Proceedings in Physics; Narrow Gap Semiconductors 2007 (81-83). Springer Verlag. https://doi.org/10.1007/978-1-4020-8425-6_20

Effect of lattice-mismatch-induced strain on Γ-, X- and L-conduction-band edges in III-V self-assembled quantum dots has been calculated. The misfit strain is shown to strongly affect the band edges, leading to a possibility of Γ-L and Γ-X crossover.... Read More about L-band-related interband transition in InSb/GaSb self-assembled quantum dots.

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.