| EPSRC Reference: |
GR/S17017/01 |
| Title: |
Stabilisation and performance enhancement in the presence of nonlinearly constrained signals |
| Principal Investigator: |
Postlethwaite, Professor I |
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| Department: |
Engineering |
| Organisation: |
University of Leicester |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
23 September 2003 |
Ends: |
22 April 2007 |
Value (£): |
245,339
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This research aims to make important advances in the performance of control systems in the presence of nonlinear temporal constraints, which arise from nonlinear actuators and the limits imposed on plant variables in order to address safety and maintenance issues. Anti-windup synthesis for unstable plants is a significant challenge and most of the work on override control is currently ad-hoc and directed to single-input single-output systems. Our emphasis will be on rigorous theoretical developments using LMI-based synthesis to guarantee stability and Lz performance for multivariable systems. Nonlinear compensators will also be investigated, building on our proposed improvements to sector-based nonlinear stability analysis.In aircraft, saturations and rate-limits can cause severe pilot-vehicle interactions, called PIOs. It is proposed to use anti-windup methods to design phase compensators to prevent PIOs. Their effectiveness will be assessed and compared with industrial designs through piloted simulations carried out by GARTEUR. An analysis technique, the so-called OLOP criterion, has been developed to predict the susceptibility of an aircraft to PIOs. However, the technique is restricted to single-input single-output systems. We propose to develop a multivariable criterion, which will have far greater applicability.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.le.ac.uk |