Phd Mechanical Engineering

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Phd Mechanical Engineering

By | Feb. 2013
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XVIII Congresso Brasileiro de Automática / 12 a 16-setembro-2010, Bonito-MS

CONTROLE ROBUSTO DA ANTENA DE UM RADAR METEOROLÓGICO
AGENOR T. FLEURY

Departamento de Engenharia Mecânica, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972 - 09850-901, São Bernardo do Campo, SP E-mail: agfleury@fei.edu.br Departamento de Engenharia Mecânica, Escola Politécnica da Universidade de São Paulo Av. Prof. Mello Moraes, 2253 – 05508-900, São Paulo, SP E-mail: agfleury@ipt.br FABRIZIO LEONARDI

Departamento de Engenharia de Produção, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972 - 09850-901, São Bernardo do Campo, SP E-mail: fabrizio@fei.edu.br FABIANO ARMELLINI

Allagi Engenharia Ltda Av. Brigadeiro Faria Lima, 1461 - Cj 124 –01452-002 - São Paulo, SP E-mail: armellini@allagi.com.br

Abstract A radar antenna is basically composed of a primary source mounted at the focal point of a parabolic reflector. The radar illumination rule is established so that the desired beam shape is attained as precisely as possible. The mechanical movement of the set reflector-pedestal must be designed to fit the desired volume of radar exploitation. This work deals mainly with the control design of a rotating radar antenna prototype that is already operating on Mogi das Cruzes, SP, under the supervision of the Brazilian Omnisys/Atech joint venture. Since all parameters related to the dynamic model are poorly known, it has been designed a robust controller to deal with. The controller was designed in order to tolerate a variation of 50% in each parameter of the inertia, stiffness or damping. The design was conduct in frequency domain by means of the Kalman Identity and LQ controller mapped to the PID structure. The ultimate performance achieved leads to less than 2 seconds settling time and to a feasible control effort. Keywords radar design; robust control; structural dynamics; finite element models Resumo Uma antena de radar é...
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