Numéro : 2144 - Year : 1991
Stabilisation system and manoeuvring procedures for the future French nuclear aircraft carrier
J.-P. JUNG, G. HARDIER, OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA)/CENTRE D'ETUDES ET DE RECHERCHES DE TOULOUSE (CERT)
P. PERDON, BASSIN D'ESSAIS DES CARENES DE PARIS
Assistance Technique A,C.B.
Much research has been carried out for the future French Nuclear Aircraft Carrier. For this, a multicriteria automatic pilot has been developed to ensure operational performance. Two modes of the pilot are described in this paper: stabilization during straight course and piloting during gyrations. Horizontal movements, such as sway, roll, yaw and motions of several specific points, are controlled to assist landing and catapulting. The command system use two pairs of lateral independent fins, one pair of steering rudders and a heel compensation system.
To stabilize the ship during straight course, a multivariable adaptive control technique has been used (linear quadratic algorithm). Moreover, an optimisation procedure calculate for the gyrations the mass transfers and determines a reference trajectory to reach a new course with a maximum heel constraint. Al! the methods have been implemented aboard a free scale model ( 1/ 12th scale) which was entirely instrumented for this occasion. The sea tests have permitted since October 1987 the first validation and the evaluation of the performances.
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