LPV modelling of the atmospheric re-entry vehicle in free flight
Résumé
Ballistic testing of flying vehicles, such as space probes or projectiles, is an important part of their design. The model describing the behaviour of a vehicle in free flight is nonlinear, characterised by the off-equilibrium dynamics and absence of the input signal. This paper presents the construction of a linear parameter varying (LPV) model describing the behaviour of a re-entry space probe in flight. The difficulties of this task reside in a lack of available trimming procedure, treated in the literature as a usual prerequisite for the LPV modelling, and a high dimension of the scheduling parameter vector. Two modelling techniques were applied: the velocity-based method and a modified version of the Jacobian linearisation method.