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Challenges and Paradigms in Applied Robust Control Part 7

Tham khảo tài liệu 'challenges and paradigms in applied robust control part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | A Decentralized and Spatial Approach to the Robust Vibration Control of Structures 169 8. Concluding remarks Two recently proposed Hro controller design methods dedicated to active structural vibration control were presented and simulated results based on a finite element model of a plate were analyzed. The spatial norm based method aims to attenuate the vibration over entire regions of the structures using the controller energy in a more effective way. The decentralized control method also tries to achieve a good energy distribution based on the application of the control effort through different controllers. A third controller based on a standard Hro design for the complete plate and using the same sensors and actuator was evaluated also to serve as a comparison base. The decentralized control presented a similar behavior to the centralized one but with a somewhat smaller control effort. Centralized control can demand more expensive equipment and is less robust in case of failures when compared to the decentralized approach. The results validate the option for a decentralized control as opposed to the regular centralized control. The spatial control as compared to the decentralized control presented the better results in terms of attenuation. The analysis was based on the response on the same punctual performance points instead of the complete region. But it is possible to affirm that a better attenuation on the complete region is present on the performance of this controller based on the mathematical definition of the spatial norm. A future investigation is related to the stability of the decentralized case since each decentralized control can affect the others. In this work this aspect was checked by the direct verification of the closed-loop stability but only for the specific configuration of the four decentralized controllers considered here. Also the choice of weighting function in the spatial control is an open problem that heavily depends on the problem s