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27th IEEE International Symposium on Industrial Electronics (ISIE)

作者： Miyamoto, Kou She, Jinhua Sato, Daiki Tokyo Inst Tech Dept Architecture & Bldg Engn Yokohama Kanagawa Japan Tokyo Univ Tech Dept Mech Engn Hachioji Tokyo Japan

ISBN: (纸本)9781538637050

This paper presents a new control system that suppresses not only the relative displacement, but also the absolute acceleration of a structure. It uses the modified-equivalent-input-disturbance (MEID) approach to design a control system. The control of the absolute acceleration is very important to protect properties and people from a large earthquake, and has been considered to be a difficult problem. To deal with this problem, this study constructed a modified EID control system to achieve satisfactory control performance.

关键词： active structural control equivalent input disturbance (EID) absolute acceleration

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active structural control with Input Dead Zone Based on Equivalent-Input-Disturbance Approach

Active Structural Control with Input Dead Zone Based on Equi...

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36th Annual Conference of the IEEE Industrial-Electronics-Society (IECON)/4th IEEE International Conference on E-Learning in Industrial Electronics/IES Industry Forum

作者： She, Jinhua Sekiya, Kozue Wu, Min Lei, Qi Tokyo Univ Technol Grad Sch Bion Comp & Media Sci Tokyo 1920982 Japan Cent South Univ Technol Sch Informat Sci & Engn Changsha 410083 Peoples R China

ISBN: (纸本)9781424452262

This paper presents an active control method that suppresses structural vibrations caused by wind and earthquakes. It is based on an equivalent-input-disturbance approach, which estimates a disturbance and produces an equivalent signal on the control input channel. We apply this approach by taking the vibrations to be a disturbance. This yields better vibration suppression performance than others. It can also compensate for unknown nonlinearities, such as a dead zone. A comparison of this method with LQR for a three-story building demonstrates the validity of the method.

关键词： active control method active structural control control nonlinearities equivalent-input-disturbance approach input dead zone structural engineering structural vibration suppression unknown nonlinearities vibration control

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A review of active structural control: challenges for engineering informatics

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COMPUTERS & STRUCTURES 2011年第23-24期89卷 2113-2132页

作者： Korkmaz, Sinan Swiss Fed Inst Technol Dept Civil Environm & Geomat Engn Wolfgang Pauli Str 15HIL E 45-3 CH-8093 Zurich Switzerland

An active structure is an engineering structure containing sensors and actuators that, when active, modify the response of the structure to its environment. Research into active structural control is growing due to factors such as new challenges in extreme environments (space, undersea, polar), contaminated contexts (nuclear, chemical, biological) and increasing awareness of earthquake risks. Advances in theory and practice of active control technology have modified the general perception of structures. This paper provides an overview of advances enabling feasible applications of active structures. Computing challenges that are important to the creation of the next generation of active structures are identified. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： active structural control active structures Engineering informatics Biomimetics Adaptive structures Intelligent structures

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Modified LQG/LTR control methodology in active structural control

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Journal of Low Frequency Noise Vibration and active control 2003年第2期22卷 97-108页

作者： Sheng, Yan Wang, Chao Pan, Ying Zhang, Xinhua Department of Engineering Mechanics Xi'an Jiaotong University 710049 Xi'an China

This paper presents a new active structural control design methodology comparing the conventional linear-quadratic-Gaussian synthesis with a looptransfer-recovery (LQG/LTR) control approach for structures subjected to ground excitations. It. results in an open-loop stable controller. Also the closedloop stability can be guaranteed. More importantly, the value of the controller's gain required for a given degree of LTR is orders of magnitude less than what is required in the conventional LQG/LTR approach. Additionally, for the same value of gain, the proposed controller achieves a much better degree of recovery than the LQG/LTR-based controller. Once this controller is obtained, the problems of control force saturation are either eliminated or at least dampened, and the controller band-width is reduced and consequently the control signal to noise ratio at the input point, of the dynamic system is increased. Finally, numerical examples illustrate the above advantages.

关键词： active structural control Comparison Conventional LQG/LTR Modified LQG/LTR Robustness

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Polynomial interpolating compensation algorithm for the time-delay of active structural control system

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2007年第2期29卷 76-78+82页

作者： Qu, Wei-Lian Wang, Zhi-Chun Tu, Jian-Wei Hubei Key Laboratory of Roadway Bridge and Structure Engineering Wuhan University of Technology Wuhan 430070 China

Time-delay and its compensation are important issues in optimal design of active structural control system. In this paper, the reasons for the time-delay and its influence on control system were analyzed. Polynomial interpolating compensation algorithm for the time-delay of active structural control system was proposed, which is proved to be valid through a numerical example.

关键词： active structural control Polynomial interpolating compensation Time-delay

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New spectra of responses and control force for design of equivalent-input-disturbance-based active structural control of base-isolated buildings

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JOURNAL OF SOUND AND VIBRATION 2021年 507卷 116160-116160页

作者： Miyamoto, Kou Sato, Daiki She, Jinhua Chen, Yinli Han, Qing-Long Shimizu Corp Inst Technol Koto Ku Tokyo 1350044 Japan Tokyo Inst Technol FIRST Yokohama Kanagawa 2268503 Japan Tokyo Univ Technol Sch Engn Hachioji Tokyo 1920982 Japan Tokyo Inst Technol Dept Architecture & Bldg Engn Yokohama Kanagawa 2268503 Japan Swinburne Univ Technol Sch Software & Elect Engn Hawthorn Vic 3122 Australia

This paper presents new spectra of responses and control force for an active base-isolated building that uses the equivalent-input-disturbance (EID) approach for active structural control. The EID approach estimates the effect of disturbances and uses it to suppress building vibrations. This system plugs an EID estimator into a conventional state-feedback control system. Note that these kinds of disturbance-rejection systems contain both feed forward and feedback terms from disturbances to a control output. This paper describes spectra that can handle systems with such structure. The spectra can be used to simplify the design of an active structural control system. This paper illustrates the use of the spectra for control-system design and presents a design algorithm for the EID-based control system. A shear building model and 44 kinds of earthquake waves are used to demonstrate the availability of the spectra.& nbsp;(c) 2021 Elsevier Ltd. All rights reserved.

关键词： Equivalent input disturbance (EID) active structural control Response spectrum control-force spectrum Feedforward control Feedback control

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Estimating the maximum response and maximum control force for high-rise base-isolated buildings with active structural control in along-wind direction

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ENGINEERING STRUCTURES 2020年 216卷 110712-110712页

作者： Chen, Yinli Sato, Daiki Miyamoto, Kou She, Jinhua Tokyo Inst Technol Sch Environm & Soc Dept Architecture & Bldg Engn Yokohama Kanagawa 2268503 Japan Tokyo Inst Technol Lab Future Interdisciplinary Res Sci & Technol FI Yokohama Kanagawa 2268503 Japan Shimizu Corp Inst Technol Koto Ku Tokyo 1350044 Japan Tokyo Univ Technol Sch Engn Hachioji Tokyo 1920982 Japan

The combination of a passive base-isolated (PBI) structure and active structural control (ASC) has been employed in many buildings globally to improve control performance. Conventional approaches have utilized numerical simulations to calculate the maximum response and maximum control force, thereby complicating the design of control systems that satisfy design limitations. To solve this problem, this study extends the gust factor approach to buildings employing a combination of PBI structures and ASC. First, a method to theoretically estimate the mean control force and mean displacement response under along-wind force using only the static equilibrium, without requiring numerical simulations, is presented. Second, estimation methods of the gust factors for the displacement and control force are devised, and numerical verifications are used to validate the estimation methods. Using the estimation method for the mean control force, mean displacement response, and gust factors, the maximum control force and maximum displacement are estimated without using numerical simulations. Finally, a design method for determining the isolated period, isolated damping ratio, and feedback gain that satisfies the restrictions on the maximum control force and maximum displacement response is developed. Subsequently, the design method is validated using a numerical design example.

关键词： Wind-induced vibration active structural control Base-isolated building Gust factor approach Linear quadratic regulator Design method

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Radiation modal expansion: Application to active structural acoustic control

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JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2000年第1期107卷 332-339页

作者： Gibbs, GP Clark, RL Cox, DE Vipperman, JS NASA Langley Res Ctr Hampton VA 23681 USA Duke Univ Durham NC 27708 USA Univ Maine Orono ME 04469 USA

This paper demonstrates active structural acoustic control using multiple input/output adaptive sensoriactuators combined with radiation filters and a feedback control paradigm. A new method of reduced order modeling/design of radiation filters termed radiation modal expansion (RME) is presented. For the experiments detailed in this paper, the RME technique reduced the modeling of the radiation matrix from 400 transfer functions to 6 transfer functions (multiplied by a constant transformation matrix). Experimental results demonstrate reductions of radiated sound power on the order of 5 dB over the bandwidth of 0-800 Hz. (C) 2000 Acoustical Society of America. [S0001-4966(00)00401-X].

关键词： sound power TRANSFER FUNCTIONS transformation matrix Bandwidth Sound control modal expansion active structural control RME Radiation Reduced order Modeling

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active structural-Acoustic control of Laminated Composite Truncated Conical Shells Using Smart Damping Treatment

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JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME 2013年第2期135卷 021001-021001-13页

作者： Shah, P. H. Ray, M. C. Indian Inst Technol Dept Mech Engn Kharagpur 721302 W Bengal India

This article deals with the active structural-acoustic control of composite truncated circular conical shells using active constrained layer damping (ACLD) treatment. The constraining layer of the ACLD treatment is made of vertically/obliquely reinforced 1-3 piezoelectric composite (PZC) material. A finite element model of smart laminated truncated conical shells backed by the acoustic cavity and integrated with the patches of such ACLD treatment has been developed to demonstrate the performance of these patches for active structural-acoustic control of symmetric and antisymmetric cross-ply and antisymmetric angle-ply truncated conical laminated shells. Both velocity and pressure rate feedback control laws have been implemented to activate the patches. Particular emphasis has also been placed on investigating the effect of variation of piezoelectric fiber orientation angle in the constraining layer on the performance of the patches.

关键词： active Patches laminate composite Antisymmetric active structural control absorption of shock CONICAL SHELLS

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Experiments on the use of fiber-optic strain sensors in active structural acoustic control

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JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 1999年第1期10卷 71-82页

作者： Masson, P Berry, A Morin, A Univ Sherbrooke Dept Engn Mech GAUS Sherbrooke PQ J1K 2R1 Canada Natl Opt Inst St Foy PQ G1P 4N8 Canada

Among the sensors available for active control of noise, strain sensors are of great interest as they can eliminate the need for far-field acoustic sensors, such as microphones. Fiber-optic strain sensors are especially of interest because they are easily embeddable into composite materials. This paper aims at a validation of the use of Fabry-Perot fiber-optic strain sensors in active structural control strategies. Two control approaches based on the direct use of discrete strain sensing are herein employed for the minimization of the acoustic radiation from a vibrating beam. The first approach involves the direct minimization of the strain levels at discrete points on the beam. The second cost function is defined as the radiated acoustic power;it involves the beam's displacement reconstruction from the strain field and is expressed in the wavenumber domain. Proper concentration of the control effort is expected with the cost function defined in the wavenumber domain but experimental constraints do not allow to demonstrate this clearly. The use of fiber-optic sensors is first validated for both control approaches with respect to an optimal solution and the impact of both approaches on radiated acoustic power is presented. It is shown that optimal and controller solutions agree well on a wide frequency band with the exception of some discrepancies arising from real-time approximations and fiber-optic reading unit limitations. The control mechanism of both approaches is then highlighted through experimental results combining acoustic and Vibration measurements. Finally, the control performance obtained using the fiber-optic sensors is compared with the control performance obtained using PV DF strain sensors and it is shown that fi her-optic sensors offer a comparable performance.

关键词： sound power Sound control Frequency bands active structural control Cost functions Fiber optic sensors strain sensors control performance strain field Optical Fibers

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