Worst-case disturbances for Time-Varying systems with application to flexible aircraft
Open access
Date
2019-06Type
- Journal Article
ETH Bibliography
no
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Abstract
The aim of this Paper is to propose a method for constructing worst-case disturbances to analyze the performance of linear time-varying systems on a finite time horizon. This is primarily motivated by the goal of analyzing flexible aircraft, which are more realistically described as time-varying systems, but the same framework can be applied to other fields in which this feature is relevant. The performance is defined by means of a generic quadratic cost function, and the main result consists of a numerical algorithm to compute the worst-case signal verifying that a given performance objective is not achieved. The developed algorithm employs the solution to a Riccati differential equation associated with the cost function. Theoretically, the signal can also be obtained by simulating the related Hamiltonian dynamics, but this does not represent a numerically reliable strategy, as commented in the Paper. The applicability of the approach is demonstrated with a case study consisting of a flexible aircraft subject to gust during a flight-test maneuver. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000388059Publication status
publishedExternal links
Journal / series
Journal of Guidance, Control, and DynamicsVolume
Pages / Article No.
Publisher
American Institute of Aeronautics and AstronauticsOrganisational unit
08814 - Smith, Roy (Tit.-Prof.)
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ETH Bibliography
no
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