Article
Engineering, Civil
Samira Azizi, Kaveh Karami, Satish Nagarajaiah
Summary: A new controller and a semi-active adjustable stiffness device (SASD) are proposed, based on a damage detection method and semi-active control strategy. The performance of the proposed controller is evaluated through numerical examples, showing that the SASD effectively decreases the dynamic responses and damage severity caused to the structure.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Mahdi Moradmand, Fereidoun Amini, Pedram Ghaderi
Summary: A smart structure integrating a semi-active control strategy with an online synchronization-based damage detection method has been developed, which shows satisfactory performance in real-time damage identification and vibration suppression. The proposed method exhibits high efficiency and capability in reducing total energy consumption compared to traditional vibration control methods.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Engineering, Civil
Huaifeng Cui, Rufu Hu, Nan Chen
Summary: The proposed integrated control system with smart structure is used for active structural acoustic control, integrating advantages of centralized and decentralized ASAC. Each smart structure has an independent controller, and coordination is achieved by sending control factors stored in the coordination structure to each smart structure. Real-time allocation of control factors solves the coupling problem between smart structures.
SMART STRUCTURES AND SYSTEMS
(2021)
Article
Acoustics
Reza Karami Mohammadi, Hadi Ghamari, Sina Zolfagharysaravi
Summary: Semi-active control is a promising method for vibration control of civil structures, and the Magneto-rheological (MR) damper is a common and practical device for this purpose. This paper introduces a new damage-based algorithm that focuses on reducing damages by optimizing structural deformations. The algorithm achieves reference active control forces using a virtual frame with pinned connections, and the command voltages of the MR damper are determined based on these forces.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Computer Science, Interdisciplinary Applications
Fereidoun Amini, Mahdi Moradmand
Summary: In this paper, a new online damage detection method using displacement and velocity measurements is developed. The proposed method can measure changes in system parameters in real time and has the capability to track abrupt parameter changes with high accuracy.
ENGINEERING WITH COMPUTERS
(2022)
Review
Engineering, Electrical & Electronic
Juan Li, Luyao Zhang, Shengquan Li, Qibo Mao, Yao Mao
Summary: This paper reviews the application of active disturbance rejection control (ADRC) technologies in piezoelectric smart structures. It focuses on the measurement, analysis, estimation, and attenuation of uncertainties and disturbances in the systems. The paper classifies and analyzes various modified forms of ADRC and highlights the advantages of ADRC in dealing with uncertainties and its potential applications in smart structures. It also reviews other types of active anti-disturbance technologies for expanding research horizons. The main features of this review are providing profound understanding and flexible approaches for researchers and practitioners in designing ADRC and identifying future directions and unsolved problems.
Article
Materials Science, Composites
Ananda Babu Arumugam, Rajeshkumar Selvaraj, Mageshwaran Subramani, Ramesh Babu Vemuluri
Summary: In this study, the vibration and instability characteristics of rotating carbon nanotube reinforced magnetorheological elastomer embedded sandwich composite plates were investigated using finite element method. The efficacy of the method was verified by comparing the natural frequencies assessed using experimental studies. The research findings show that the CNT reinforcement significantly improves the stiffness and damping of the composite plates and reduces the instability regions.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Hakan Basargan, Andras Mihaly, Peter Gaspar, Olivier Sename
Summary: This study introduces an online reconfigurable road-adaptive semi-active suspension controller that achieves performance objectives while satisfying dissipativity constraint. The controller solves the input saturation problem by considering the characteristics of the damper and integrates the saturation actuator into the initial system. The online reconfiguration and adaptivity are achieved using an external scheduling variable, resulting in better performance compared to other models.
Article
Computer Science, Interdisciplinary Applications
Dominik Pisarski, Lukasz Jankowski
Summary: The problem of adaptive control of transient structural vibration induced by unknown harmonic excitation is studied in this paper. A specially designed reinforcement learning algorithm is used to adjust the parameters of a switching control policy to guarantee efficient dissipation of the structural energy. Numerical experiments are conducted on a span structure equipped with a semi-active device to examine the performance of this method.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Construction & Building Technology
Himan Hojat Jalali, Maziar Fahimi Farzam, Seyyed Ali Mousavi Gavgani, Gebrail Bekdas
Summary: In this study, comprehensive research on control algorithms with soil-structure interaction (SSI) effects is conducted. The algorithms used include Clipped-Optimal Control (COC), Lyapunov, Bang-Bang, and Fuzzy with two Passive-On (P-On) and Passive-Off (P-Off) cases. The characteristics of different types of soil are investigated, and the efficiency of these algorithms in determining the appropriate voltage and control force of the Magneto-rheological Damper (MR) is evaluated using a 5-story linear shear building and various ground motions. The results show that the COC and Bang-Bang algorithms have better performance and provide a robust method for semi-active control of structures equipped with MR dampers.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Mathematics
Yuwen Zhou, Yuhan Hu, Jing Sun, Rui He, Wenjie Kang
Summary: Federated Learning (FL) is a technique for distributed data optimization that protects data privacy by aggregating local models. However, the lack of labeled data and the presence of non-independent and identically distributed (non-IID) data limit the application of FL. This article proposes a semi-federated active learning (semi-FAL) framework that efficiently handles unlabeled online network data, achieving high accuracy and fast convergence.
Article
Automation & Control Systems
SeokJu Kang, Jinah Noh, Jung-Wook Park
Summary: This article introduces the smart inverter (SI) and its application in integrating distributed energy resources (DERs). A new active distribution management system (ADMS) is proposed for the integration of photovoltaic (PV)/energy storage system (ESS) to regulate system voltage and solve line congestion issues. Case studies on a practical distribution system in South Korea were conducted to verify the effectiveness of the proposed ADMS.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Civil
Ann C. Sychterz, Angshuman C. Baruah
Summary: This research successfully studied the actuation of Miura-Ori origami structures by combining form-finding and finite element modeling. Simulations and experimental tests serve as a starting point for determining the behavior of mid-scale actuated origami structures.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Mechanical
Simon Schleiter, Okyay Altay
Summary: This paper presents a vibration control algorithm combined with a nonlinear system identification method for variable stiffness tuned mass dampers (VS-TMDs) to control multistory shear frame structures with abrupt stiffness degradations. The proposed stiffness variable control (SVC) algorithm, based on the mitigation of potential energy, and the adaptive unscented Kalman filter (A-UKF) scheme are utilized for system parameter identification. The results demonstrate that the proposed approach outperforms passive TMD control by successfully detecting abrupt stiffness changes and adapting damper stiffness.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Review
Materials Science, Composites
Rajeshkumar Selvaraj, Manoharan Ramamoorthy
Summary: This article reviews the research on semi-active vibration suppression of flexible structures using MR fluids and MR elastomers. The stiffness and damping characteristics of beams, plates, panels, and shells integrating MR core layers are discussed, along with the influence of various MR treatment configurations on the vibration properties of sandwich structures. Additionally, the article focuses on the role of carbon nanotubes in enhancing the performance of MR materials.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Kaveh Karami, Pejman Fatehi, Azad Yazdani
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2020)
Article
Engineering, Civil
Hassan Rezazadeh, Fereidoun Amini, Majid Amin Afshar
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
(2020)
Article
Acoustics
Pedram Ghaderi, Fereidoun Amini, Mohammad Emamian
JOURNAL OF VIBRATION AND CONTROL
(2020)
Article
Computer Science, Interdisciplinary Applications
Fereidoun Amini, Mahdi Moradmand
Summary: In this paper, a new online damage detection method using displacement and velocity measurements is developed. The proposed method can measure changes in system parameters in real time and has the capability to track abrupt parameter changes with high accuracy.
ENGINEERING WITH COMPUTERS
(2022)
Article
Acoustics
Saeid Sourni, Yazdan Batmani, Kaveh Karami
Summary: This article presents an adaptive optimal controller for addressing parametric uncertainties in seismic motion control of structures. The controller's design is straightforward and its performance is stable.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Article
Energy & Fuels
Erfan Amini, Danial Golbaz, Fereidoun Amini, Meysam Majidi Nezhad, Mehdi Neshat, Davide Astiaso Garcia
Article
Engineering, Civil
Mahdi Moradmand, Fereidoun Amini, Pedram Ghaderi
Summary: A smart structure integrating a semi-active control strategy with an online synchronization-based damage detection method has been developed, which shows satisfactory performance in real-time damage identification and vibration suppression. The proposed method exhibits high efficiency and capability in reducing total energy consumption compared to traditional vibration control methods.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Engineering, Mechanical
Fereidoun Amini, Yousef Hedayati, Hadi Zanddizari
Summary: This study investigates data loss recovery of multiple signals with variable loss ratio by exploiting inter-correlation across vibration signals and using Distributed Compressive Sensing (DCS). Different projection matrices are used for handling non-uniform data loss pattern across channels, and a new projection matrix (PRD) is proposed to enhance reconstruction accuracy and robustness to continuous data loss.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Construction & Building Technology
Fereidoun Amini, Nazanin Nazmdar Shahri
Summary: The study proposed a new method to find optimal control forces for structures equipped with smart tuned liquid column gas dampers, considering variable characteristics of the structure and soil-structure interaction. Gas pressure inside the columns is calculated by regularly adjusting and updating the frequency and damping of the dampers. Unknown or changed soil-structure characteristics are estimated using a system identification method, and damper parameters are determined through an optimization algorithm. Results showed that the smart damper effectively reduced structural displacement.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Hassan Rezazadeh, Fereidoun Amini, Parichehr Dogani Aghcheghloo, Ali Khansefid
Summary: This research proposes a novel model for considering the effects of geometrical nonlinearity in the response of bidirectional tuned mass dampers (TMDs). The study shows that in some cases, considering nonlinear terms can improve the performance of TMDs, but may also result in very high response amplitudes.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Civil
Samira Azizi, Kaveh Karami, Satish Nagarajaiah
Summary: A new controller and a semi-active adjustable stiffness device (SASD) are proposed, based on a damage detection method and semi-active control strategy. The performance of the proposed controller is evaluated through numerical examples, showing that the SASD effectively decreases the dynamic responses and damage severity caused to the structure.
ENGINEERING STRUCTURES
(2021)
Article
Acoustics
Fereidoun Amini, Elham Aghabarari
Summary: The study uses online identification and a simple adaptive control algorithm to improve structural performance, identifying stiffness and damping parameters using the recursive least squares method, and examining the limited information regarding sensor measurements, parameter convergence, and the effects of the covariance matrix.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Construction & Building Technology
Kaveh Karami, Hasan Ahmadi
Summary: The study aims to reduce torsional effects and dynamic responses of structures by combining real-time structural health monitoring and semi-active control strategies. A new damage detection method and controller design based on identified Markov parameters are proposed and validated through numerical examples.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Construction & Building Technology
Fereidoun Amini, Yousef Hedayati, Seyed Mohammad Javadi
Summary: The study proposes a method using compressive sensing (CS) to recover lost data packets in the networked control of civil structures. By applying CS to the state vector, the method achieves high accuracy in data recovery without waiting for the reception of lost packets.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Civil
Vida Ghasemi, Fereidoun Amini
SMART STRUCTURES AND SYSTEMS
(2020)