Evaluations of Effectiveness for Active Response Control of Building Structures

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This report a summary of researches regarding to evaluations of reliability of active response control systems of building structures. The contents are composed by following chapters.Chapter 1.Introduction.Chapter 2.The state-of-the-art of response control systems for building structures.Chapter 3.Development of a testing apparatus CTAC.Chapter 4.Evaluation of reliabilities for various active control algorithms by experimental investigations using CTAC and by numerical simulations.Chapter 5.Advanced active control system.Chapter 6.Concluding remarks.The CTAC (Compact Testing system for Active response Control) in Chapter 3 was developed in Osaka university, and it shows high performances for testing various kinds of active control systems. In Chapter 4, many different kinds of control algorithms are examined. And a practical new control algorithm named 'Digital-Optimizing Control' algorithm is proposed. With this algorithm, no spill over has been occurred. As advanced active control systems, in Chapter 5, two new types of active control concepts 'Active fin control system' and 'Active coupling control system' are introduced. Wind tunnel plays important roll to investigate the effective angle of the rotatable fin in the 'Active fin control'. And, virtual negative stiffness which can be realized by a set of spring and motor makes good results in the 'Active coupling control of two structures'.