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- Antonis Papachristodoulou, James Anderson, Giorgio Valmorbida, Stephen Prajna, Peter Seiler, Pablo A Parrilo +6 others
- 2004

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied… (More)

- Peter Seiler, Bongsob Song, J Karl Hedrick
- 1999

The analysis of a rear-end collision warning/ avoidance (CW/CA) system algorithm will be presented. The system is designed to meet several criteria: 1. System warnings should result in a minimum load on driver attention. 2. Automatic control of the brakes should not interfere with normal driving operation. 3. The system should perform well in a variety of… (More)

- Ahmet Arda Ozdemir, Peter Seiler, Gary J Balas
- 2011

Up-down counters are commonly used in the aerospace industry for fault detection thresholding. This paper applies the up-down counter technique to detect wind turbine faults. The thresholding problem involves a tradeoff between false alarms and missed detections. Counter based thresholding can detect smaller faults with higher probability and lower false… (More)

- Stephen Prajna, Antonis Papachristodoulou, Peter Seiler, Pablo A Parrilo
- 2004

— We describe the latest additions to SOS-TOOLS, a freely available MATLAB toolbox for formulating and solving sum of squares programs. Among the many improvements, there are native polynomial objects, structure-exploiting techniques for sparse and structured polynomials, new customized functions, and support for alternative SDP solvers. We sketch some of… (More)

- Abhijit Chakraborty, Peter Seiler, Gary J Balas
- 2010

Current practice for flight control validation relies heavily on linear analyses and nonlinear, high-fidelity simulations. This process would be enhanced by the addition of nonlinear analyses of the flight control system. This paper demonstrates the use of region of attraction estimation for studying nonlinear effects. A nonlinear polynomial model is… (More)

- Bálint Vanek, Peter Seiler, József Bokor, Gary J Balas
- 2010

The present article considers the application of robust H ∞ filters for non-linear aircraft models in cruise flight conditions. The achieved performance of various design scenarios are first compared with the best achievable lower bound, calculated using frequency-gridding method. The synthesis problem is than validated on the linear uncertain aircraft… (More)

- Timothy J Wheeler, Peter Seiler, Andrew K Packard, Gary J Balas
- 2011

— In the aircraft industry, it is common to use physically redundant components to ensure that the overall system meets the necessary safety requirements. For systems where physical redundancy is impractical (e.g, Unmanned Aerial Vehicles), analytical redundancy can be used to reduce the number of components needed. However, it is more difficult to certify… (More)

- Peter Seiler, Qian Zheng, Gary J Balas
- 2013

— A sum-of-squares is a polynomial that can be expressed as a sum of squares of other polynomials. Determining if a sum-of-squares decomposition exists for a given polynomial is equivalent to a linear matrix inequality feasibility problem. The computation required to solve the feasibility problem depends on the number of monomials used in the decomposition.… (More)

- Peter Seiler, Balint Vanek, József Bokor, Gary J Balas
- 2010

— This paper considers the design of robust H∞ filters for continuous-time linear systems with uncertainties described by integral quadratic constraints (IQCs). The synthesis problem can be converted into an infinite-dimensional optimization with frequency dependent linear matrix inequality constraints on the filter and IQC multipliers. This optimization is… (More)

- Peter Seiler, Gary J Balas, Andrew K Packard
- 2014

The current practice to validate flight control laws relies on applying linear analysis tools to assess the closed loop stability and performance characteristics about many trim conditions. Nonlinear simulations are used to provide further confidence in the linear analyses and also to uncover dynamic characteristics, e.g. limit cycles, which are not… (More)