S5  Controle Ativo de Vibrações e Estruturas Inteligentes    Titulo: A BAND-LIMITED H-INFINITE CONTROLLER FOR ACTIVE STRUCTURAL NOISE CONTROL   Resumo : THIS WORK PRESENTS AN ACTIVE STRUCTURAL NOISE CONTROL METHOD, ASNC, FOR THE MID-FREQUENCY RANGE. THIS CONTROL APPROACH AIMS TO ATTENUATE THE MODES OF A STRUCTURAL SYSTEM THAT ARE SOURCE OF ACOUSTICAL NOISE. CALLED BAND-LIMITED H-INFINITE CONTROLLER, THIS APPROACH ALLOWS TO DESIGN A REDUCED ORDER H-INFINITE CONTROLLER TO ATTENUATE ONLY NOISE RADIATING MODES. THIS CONTROLLER HAS THE CHARACTERISTIC OF KEEPING THE DYNAMICS OF THE RESIDUAL MODES UNCHANGED, INCLUDING A ROBUSTNESS CHARACTERISTICS WITH RESPECT TO THE RESIDUAL DYNAMICS IN THE DESIGN. THEREFORE, BY ADDING A ROBUSTNESS REQUIREMENT WITH RESPECT TO PARAMETRIC UNCERTAINTIES, THE PERFORMANCE OF THE CLOSED-LOOP SYSTEM IS PRESERVED UNDER VARIATIONS OF THE NATURAL FREQUENCY AND DAMPING OF THE CONTROLLED MODES. THIS APPROACH IS TESTED IN A REAL EXPERIMENT WITH A PLATE. KEY-WORDS: ACTIVE STRUCTURAL NOISE CONTROL, ROBUST CONTROL, FEEDBACK CONTROL, ACTIVE CONTROL    Autores : Arruda, José Roberto de Fança Moreira, Fernando J. O.     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local