Seminar Details
2012-01-31 (14.00) : Control design and reverse engineering using observer-based structures: Application to the control of flexible aerospace vehicles
At Euler building
Organized by Mathematical Engineering
Speaker :
Daniel ALAZARD (Supaero Toulouse)
Abstract :
This seminar aims to present convenient tools, based on the observer-based realization
of a given arbitrary controller, to solve robust, multi-objective and gain-scheduling con-
trol problems. These tools are applied on practical examples in the field of aerospace
engineering (launcher, aircraft flight control, ...).
Observer based compensators are useful for different practical
reasons. The key advantage of these controller structures no doubt
lies in the fact that the controller states are meaningful variables
as estimates of the physical plant states: thus, the interpolation of
controllers or the initialization of switched controllers becomes
easier using observer based realization.
Based on the observer based realization of a given controller, the
Cross Standard Form (CSF) is also introduced as a reverse engineering
tool: i.e. a solution to the generalized inverse optimal control
problem. The CSF is a canonical augmented standard plant whose H_\infty or
H2 optimal controller is a given controller. From the multi-objective
point of view, the general idea is to apply the CSF to a first
controller satisfying nominal performances in order to initialize an
H_\infty design procedure to handle frequency-domain constraints or
robustness specifications.