Article
Acoustics
Yueyue Zhu, Xiling Xie, Zhiyi Zhang
Summary: A control method using an active orthogonal support has been proposed to reduce the influence of dynamic forces on the hull structure by connecting the stern bearing and hull structure in vertical and horizontal directions. Both numerical and experimental results have demonstrated that the active orthogonal support can significantly suppress hull vibration and acoustic radiation in a shaft-hull-coupled system.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Mechanics
Hui Zhang, Wei Sun, Haitao Luo, Rongfei Zhang
Summary: To study active control of the geometrically nonlinear vibration of flexible composite laminates, a dynamic model is created and the effect of vibration reduction is predicted. Nonlinear deformation theory and velocity feedback controller are introduced to establish an active control model for composite laminates with macro fiber composites (MFC). An improved Newmark-β method is proposed for solving the nonlinear model, which shows better consistency and efficiency. The study confirms the effectiveness of active control on nonlinear vibration and determines optimal control parameters and MFC positions.
COMPOSITE STRUCTURES
(2023)
Article
Automation & Control Systems
Xingxing Wang, Yuechao Ma
Summary: This paper investigates the issue of finite-time sliding mode control for a class of Markov jump systems considering parameter uncertainties, external disturbances, and time-varying delay. A suitable observer-based control law is devised to achieve the finite-time reaching of the sliding mode surface, with the controller gain asynchronous to the mode of the original system. The sufficient conditions for finite-time boundedness in the sliding phase and reaching phase are derived using the time partition strategy. Additionally, the gains of the observer and the observer-based controller are obtained using linear matrix inequalities, and the merits of the SMC strategy are confirmed through emulation products.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2022)
Article
Mechanics
Mohammad Fadaee, Mostafa Talebitooti
Summary: This article investigates the vibration analysis of a beam-fluid coupled system and the control of cantilever beam's vibration amplitude using magnetostrictive layers and a closed-loop velocity proportional feedback control approach. The coupled fluid-structure system's equation of motion is solved using analytical and Galerkin methods, and convergence and comparison studies are presented to verify the stability and accuracy. The effects of various parameters on the controlled and uncontrolled vibration amplitudes, such as fluid depth, beam length, and distribution type of carbon nanotubes, are investigated.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Automation & Control Systems
Jose Ramirez-Senent, Jaime H. Garcia-Palacios, Ivan M. Diaz
Summary: This article presents the practical application of dynamics inversion techniques to the force control of electrodynamic proof-mass actuators used as active vibration absorption systems. A novel vibration control algorithm called velocity feedback with dynamics inversion is proposed and its performance is evaluated through experimental tests on a glass fiber reinforced polymer footbridge. The results show that the suggested method outperforms the classical velocity feedback approach in reducing vibrations.
CONTROL ENGINEERING PRACTICE
(2023)
Article
Acoustics
D. Cakmak, Z. Tomicevic, H. Wolf, Z. Bozic, D. Semenski
Summary: This paper presents an analytical study on stability and performance of supercritical linear active vibration isolation systems, showing that including an optimized inerter in the isolator can introduce instabilities in an otherwise unconditionally stable active system and deteriorate isolator performance. By serial dashpot/inerter arrangement and simultaneous optimization, improved performance may be achieved.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Automation & Control Systems
Zhiying Wu, Junlin Xiong, Min Xie
Summary: This paper investigates the event-triggered control problem for networked control systems subject to deception attacks. An improved event-triggered scheme is proposed to reduce transmission rate and a new switched time-delay system model is developed. Exponential mean-square stability criteria are derived using a constructed Lyapunov function, and a co-design method is developed to obtain trigger parameters and mode-dependent controller gains. The proposed scheme is verified by an unmanned aerial vehicle system.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2021)
Article
Construction & Building Technology
Tatsuya Ito, Masaharu Tagami, Yasutaka Tagawa
Summary: This study aims to develop a high-performance active mass damper for super high-rise buildings. Conventional dampers cannot effectively damp the vibration of these buildings due to their low sensitivity in the low-frequency band. Therefore, this study proposes the use of cameras and image processing to measure vibration displacements instead of accelerometers. The proposed method achieved higher measurement accuracy in the low-frequency band compared to accelerometers. Furthermore, the problem of time delay in calculation was solved using the Pade approximation.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Mechanical
Minghao Chen, Qibo Mao, Lihua Peng, Qi Li
Summary: With the evolution of the aerospace industry, structures have become larger and more complex, necessitating effective vibration control measures. The study introduced an independent control unit, LBIA, combining a loudspeaker-based inertial actuator with an integrated piezoelectric ceramic sensor, enabling autonomous vibration control and reducing vibration to save costs.
Article
Engineering, Electrical & Electronic
Lingbo Zheng, Wansheng Nie, Biao Xiang
Summary: This study introduces an air-blower with active magnetic bearings to improve working efficiency and reduce energy consumption by avoiding contact between the rotor shaft and the stator part. Force and dynamic models were developed to analyze the vibration characteristics of the rotor shaft and a control method was designed to suppress the vibration amplitude. Experimental results confirmed the feasibility of the theoretical models.
Article
Chemistry, Physical
Zhicheng Huang, Yuhang Mao, Anna Dai, Mengna Han, Xingguo Wang, Fulei Chu
Summary: This paper focuses on the active vibration control of piezoelectric sandwich plate. The study establishes the dynamic equation for active control based on laminate theory and constitutive equation of piezoelectric material, and solves it using the Rayleigh-Ritz method. Parametric studies are conducted to analyze the effects of different boundary conditions and piezoelectric patch positions. The results show that these factors significantly impact the natural frequency of the plate structures. Moreover, the study also investigates active vibration control and finds that the speed feedback coefficient and position of the piezoelectric patches play important roles in the control effectiveness and cost.
Article
Automation & Control Systems
Burkhard H. Freyer, Nico J. Theron, P. Stephan Heyns, Lutz A. Pickelmann
Summary: This study demonstrates the dual functionality of a piezoelectric transducer in actively controlling simulated tool vibrations, using self-sensing actuators and adaptive feedback control. The selected building blocks of the complete control loop were found to be crucial for the system design, allowing potential for a single transducer design and simultaneous tool condition monitoring. The system showed 10 dB attenuation of tool vibrations, bending-mode-focused control, and a feedback signal-to-noise ratio of 20, indicating its functionality.
CONTROL ENGINEERING PRACTICE
(2021)
Article
Materials Science, Multidisciplinary
X. L. Yu, X. H. Zhang, J. F. Wang
Summary: This study investigates the active control of vibration for piezoelectric-integrated functionally graded carbon nanotube reinforced composite plates using the finite element method. The results indicate that active control has potential for practical applications in civil and mechanical engineering.
FRONTIERS IN MATERIALS
(2022)
Article
Acoustics
Nur Afifah Kamaruzaman, William S. P. Robertson, Mergen H. Ghayesh, Benjamin S. Cazzolato, Anthony C. Zander
Summary: This paper compares passive and active stability analyses of a six degree of freedom quasi-zero stiffness magnetic levitation vibration isolation system. The study shows that increasing passive stability has a minimal impact on isolation performance, but control benefits from improved passive stability. The designed control system demonstrates robustness to uncertainties with a large stability margin dominating the closed-loop response.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Acoustics
J-J Sinou, B. Chomette
Summary: This paper discusses a strategy for estimating the critical time delay in the problem of Friction-Induced Vibration and Noise (FIVE) by conducting stability analysis and frequency sweep test. The proposed approach is illustrated to be efficient through numerical examples, providing a clear understanding and illustration of the phenomena involved and observed.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Civil
H. S. Bauomy, A. T. El-Sayed
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2015)
Article
Engineering, Mechanical
A. T. EL-Sayed, H. S. Bauomy
NONLINEAR DYNAMICS
(2016)
Article
Engineering, Multidisciplinary
A. T. El-Sayed, H. S. Bauomy
APPLIED MATHEMATICAL MODELLING
(2018)
Article
Mechanics
H. S. Bauomy, A. T. EL-Sayed
ARCHIVE OF APPLIED MECHANICS
(2018)
Article
Physics, Multidisciplinary
H. S. Bauomy, A. T. EL-Sayed
Article
Automation & Control Systems
Hany Samih Bauomy, Ashraf Taha EL-Sayed
MEASUREMENT & CONTROL
(2020)
Article
Engineering, Multidisciplinary
H. S. Bauomy, A. T. EL-Sayed
APPLIED MATHEMATICAL MODELLING
(2020)
Article
Acoustics
Ashraf T. EL-Sayed Taha, Hany S. Bauomy
Summary: The article investigates the application of nonlinear dynamic vibration controller in a beam-ring structure to effectively control the vibrations of a circular truss antenna exposed to mixed excitations, obtaining four-dimensional averaged equations through multiple time scales. The controller can eliminate the framework's vibrations in a short time and analyzes various coefficients.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Engineering, Multidisciplinary
H. S. Bauomy
Summary: This study introduces a new active controller technique, NPDCVF, for improving the performance of FG cylindrical shell structure under joint harmonic and parametric excitations. By comparing three different controller methods, it is found that NPDCVF is the best controller for reducing high vibration amplitudes.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Physics, Multidisciplinary
H. S. Bauomy, A. T. EL-Sayed
Summary: The study investigates the application of nonlinear time delay saturation controller (NTDSC) in minimizing vibrations of a vertical cantilever beam. Analytical solutions and numerical simulations are used to analyze the impacts of primary and internal resonance on the system response, as well as the effects of controller parameters and time delays. The results provide a theoretical foundation for system design and construction.
Article
Physics, Multidisciplinary
H. S. Bauomy, A. T. EL-Sayed
Summary: This paper investigates the internal resonance of a circular dielectric elastomer membrane under mechanical and electrical excitations to improve its performance for future applications. A time-delayed proportional-derivative (TDPD) controller is proposed to reduce the oscillations of the DE system and improve stability and transient response. The first-order approximation solutions of the DE system are calculated and the dynamic solution with TDPD controllers is obtained using analytical and numerical approaches.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Engineering, Multidisciplinary
H. S. Bauomy, A. T. EL-Sayed, F. T. El-Bahrawy, A. M. Salem
Summary: This paper analyzes and controls the nonlinear vibration of an ongoing spinning shaft. Investigations are made on major resonances and nonlinear modal interactions between the rotor and controller modes. The averaging procedure is analyzed to obtain the solution of the system's equations with a Nonlinear Integration Positive Position Feedback controller (NIPPF). A good correlation is achieved between the approximate solutions and numerical simulations utilizing the fourth-order Runge-Kutta method (RK4). The linearized stability approach is applied to the autonomous system for stability near fixed positions, and the steady-state stability and amplitude of the nonlinear systems are examined before and after control. Frequency response curves (FRCs) are evaluated at various values of controller and system parameters. MATLAB is used to compare analytical and numerical responses to ensure their comparability. The conclusion is drawn that the NIPPF control technique offers optimal model control, and the settings reduce the intensity of vibration.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Mechanical
H. S. Bauomy, A. T. El-Sayed
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2016)
Article
Engineering, Biomedical
H. S. Bauomy, A. T. El-Sayed, T. M. N. Metwaly
JOURNAL OF VIBROENGINEERING
(2016)
Article
Acoustics
A. T. EL-Sayed, H. S. Bauomy
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2015)
