. Flg, 30 -Critère J Q sans contrôle et avec FlG. 3.33 -Critère J 0 sans contrôle et avec contrôle par 1 source pour un placement op-contrôle par 2 sources pour un placement optimal à toutes fréquences, C2). timal à toutes fréquences (C2)

. Flg, 31 -Critère JQ sans contrôle et avec FlG. 3.34 -Critère J 0 sans contrôle et avec contrôle par 3 sources pour un placement op-contrôle par 4 sources pour un placement optimal à toutes fréquences, C2). timal à toutes fréquences (C2)

Q. and L. Solution-du-problème, appartient à Ci. C'est donc le minimum de g(Q) avec Q G Ci. Cela entraine que: VQ ? Ci g{Q) > g{Q°) En particulier VQ ? T g(Q) >~g{Q°)

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