S5  Controle Ativo de Vibrações e Estruturas Inteligentes    Titulo: SMART MATERIALS IN ULTRA-PRECISION POSITIONING   Resumo : IN A GENERAL FORM, ACTUAL REQUIREMENTS AS HIGH PERFORMANCE AND SMALL SIZES FOR MECHATRONIC SYSTEMS, HAS LEAD MODERN INDUSTRY TO DESIGN POSITIONING SYSTEMS WITH GOOD CHARACTERISTICS OF ACCELERATION AND POSITIONING ACCURACY. BY OTHER WAY, THE INCREASING DEMAND OF COMPONENTS WITH BETTER METROLOGICAL AND FINISHING CHARACTERISTICS, AS X-RAY AND INFRA-RED LENS, HAS ALLOW THE DEVELOPMENT OF A NUMBER OF TYPES OF MICROPOSITIONING SYSTEMS THAT ARE ABLE TO MOVE MACHINE ELEMENTS IN VERY SMALL DISPLACEMENTS WITH HIGH LEVEL OF ACCURACY. IN THIS WORK IT IS PROPOSED THE USE OF A NEW TYPE OF ACTUATOR THAT APPLIES THE PROPERTIES OF ELECTROMAGNETIC STRAIN OF CERTAIN METALLIC JOINING (MAGNETOSTRICTIVE ACTUATORS). IT IS ALSO PROPOSED THE APPLICATION OF A DIGITAL CONTROL SYSTEM THAT USE A CONTROL ALGORITHM WHICH IS BASED ON FUZZY LOGIC AND ARTIFICIAL NEURAL NETWORKS FOR THE MICROPOSITIONING CONTROL. KEYWORDS: MAGNETOSTRICTIVE ACTUATOR, FUZZY LOGIC, NEURAL NETWORK, PRECISION POSITIONING.    Autores : Duduch, Jaime G. Rubio, Juan C. Campos Santoro, Fernando G.     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local