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Journal articles on the topic 'Simulated input vibration'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Rigacci, Massimiliano, Ryuta Sato, and Keiichi Shirase. "Power Consumption Simulation of Servo Motors Focusing on the Influence of Mechanical Vibration on Motor Efficiency." International Journal of Automation Technology 16, no. 1 (2022): 104–16. http://dx.doi.org/10.20965/ijat.2022.p0104.

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This paper presents a simulation method for the power consumption of servo motors, focusing on the influence of vibrations on the motor efficiency. An apparatus consisting of two servo motors connected through a coupling was specifically designed for this study. The efficiency of the servo motor was experimentally investigated for several torque vibration levels imposed through the selection of the control parameters, and the torque vibration level was quantified through the standard deviation of the torque signal. The efficiency map characteristics for each torque oscillating level were deter

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Chiu, M. C., Y. C. Chang, L. J. Yeh, and C. H. Chung. "Optimal Design of a Vibration-Based Electromagnetic Energy Harvester Using a Simulated Annealing Algorithm." Journal of Mechanics 28, no. 4 (2012): 691–700. http://dx.doi.org/10.1017/jmech.2012.104.

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ABSTRACTThis paper presents the optimal design of an electromagnetic vibration-based generator using the simulated annealing method (SA). To optimally extract the vibrational energy of a system vibrating at a specific frequency, the selected mass and spring stiffness of a resonant vibration is required. The relationship between induced energy and the generator's structure, its permanent magnet height and diameter, number of turns, and wire diameter in a single air coil are discussed. Also, a prototype of the vibrationbased electrical generator is built and tested via a shaker excited at resona

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Wang, Shuang, Xin Ma, Yongcun Guo, Shousuo Sun, and Zeyong Hu. "Vibrational coupling mechanism and experimental study of rotor system with double-disk magnetic coupler." Advances in Mechanical Engineering 15, no. 3 (2023): 168781322311629. http://dx.doi.org/10.1177/16878132231162954.

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At present, the vibrational coupling mechanism of the rotor system with a double-disk magnetic coupler has not been sufficiently studied. Based on the mechanical impedance theory, the patterns of structural mass and stiffness distribution were quantitatively described, to establish the model for the vibrational coupling mechanism. Methods were proposed to determine the vibrational coupling point and to simulate the transient response to the interacting excitations, so as to analyze the potential vibrational coupling point and the dynamic response characteristics. Then, the Campbell diagram of

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Tolomeo, Jason, and Y. Lee. "High-Intensity Acoustics Simulated by a Shaker." Journal of the IEST 44, no. 2 (2001): 19–22. http://dx.doi.org/10.17764/jiet.44.2.u668kp0n24763866.

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Designing an appropriate shaker random vibration test to accurately simulate a high-intensity acoustic environment is complicated by the fundamental differences in the nature of acoustic excitation and baseshake input, as well as test fixture and boundary condition differences. A coupon random vibration test of a spacecraft panel with an imbedded heatpipe component was performed to simulate the expected acoustic environment at liftoff and flight. Analytical predictions of the acoustic response of the full panel were made and then compared with predictions of the baseshake response of the coupo

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Sampe, Jahariah, Farah Fatin Zulkifli, Nor Afidatul Asni Semsudin, Md Shabiul Islam, and Burhanuddin Yeop Majlis. "ULTRA LOW POWER HYBRID MICRO ENERGY HARVESTER USING RF, THERMAL AND VIBRATION FOR BIOMEDICAL DEVICES." International Journal of Pharmacy and Pharmaceutical Sciences 8, no. 2 (2016): 18. http://dx.doi.org/10.22159/ijpps.2016v8s2.15213.

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<p class="lead">The objective of this research is to design ultra-low power Hybrid Micro Energy Harvester (HMEH) circuit using hybrid inputs of radio frequency (RF), thermal and vibration for biomedical devices. In the HMEH architecture, three input sources (RF, thermal and vibration) are combined in parallel to solve the limitation issue of a single source energy harvester and to improve the system performance. Energy will be scavenged from the human body for thermal and vibration sources by converting directly temperature difference and human movement to electrical energy. The inputs a

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Arabasi, Sameer, and Ziyad Masoud. "Simultaneous Travel and Hoist Maneuver Input Shaping Control Using Frequency Modulation." Shock and Vibration 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/5703820.

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This paper presents an input shaping control system for overhead crane operations involving simultaneous hoist and travel maneuvers. The control system utilizes model-based partial feedback linearization with frequency modulation. Traditional input shaping controllers target specific system frequencies. Therefore, they are incapable of accommodating the time dependant frequency associated with simultaneous hoist and travel crane maneuvers. Frequency modulation is used to tune the time-dependent system frequency to the design frequency of a primary input shaping controller. Partial feedback lin

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Smith, Marshall E., Gerald S. Berke, Bruce R. Gerratt, and Jody Kreiman. "Laryngeal Paralyses." Journal of Speech, Language, and Hearing Research 35, no. 3 (1992): 545–54. http://dx.doi.org/10.1044/jshr.3503.545.

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The neurological causes of vocal fold paralyses have been well documented. However, the effect of these disorders on laryngeal vibration is not well understood. A theoretical four-mass model of the larynx, based on the work of Ishizaka and Isshiki (1976) and Koizumi, Taniguchi, and Hiromitsu (1987), was developed and adapted to simulate laryngeal biomechanical behavior. The model was used to evaluate various states of asymmetric laryngeal vibration. Input parameters that relate observed laryngeal function and model simulation were developed. Laryngeal paralyses were simulated by their predicte

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Amali, S. H. N. S. K., M. Md Nujid, M. F. M. Zaki, Z. M. Ghazaly, N. F. Bawadi, and M. M. Ahmad. "Effect of damper mass on soil-structure displacement in dynamic response to earthquake vibration with finite element modelling." IOP Conference Series: Earth and Environmental Science 1303, no. 1 (2024): 012008. http://dx.doi.org/10.1088/1755-1315/1303/1/012008.

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Abstract Earthquake is a natural disaster that always occur inside the region of pacific ring of fire. Many structures such as high-rise buildings, bridges, dams and many more failed and take severe damage due to the impact of the strong vibration of the earthquake. A pile foundation is a type of deep footing which is suitable for high-rise buildings founded on clay soils where its function to prevent potential failures such as bearing capacity and collapse. In addition, the problem of tall buildings is prone to sway and damaged when earthquake strike and such vibrations cause the dynamic beha

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Li, Xianhong, Haibin Yu, Peng Zeng, Mingzhe Yuan, Lanxiang Sun, and Yu Zhao. "DYNAMIC TWO-DIMENSIONAL NONLINEAR VIBRATION MODELING AND ANALYSIS FOR SHIELD TBM CUTTERHEAD DRIVING SYSTEM." Transactions of the Canadian Society for Mechanical Engineering 38, no. 4 (2014): 417–63. http://dx.doi.org/10.1139/tcsme-2014-0030.

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This paper establishes a general dynamic two-dimensional nonlinear time-varying (TDNLTV) vibration model with multi-drive shaft for shield tunnel boring machine (TBM) cutterhead driving system. Multiple- input and multiple- output (MIMO) state-space vibration model of cutterhead driving system is also presented. TDNLTV vibration model is simulated, and physical parameters’ effects on the vibration response are detailed investigated. A preliminary approach is proposed to reduce vibration or nonlinear vibration behaviors. Dynamic TDNLTV vibration model provides a basic foundation of fault detect

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Gülbahçe, Erdi, Mehmet Çelik, and Mustafa Tinkir. "Theoretical Investigation of a Structure for Active Vibration Control with Fuzzy Logic Approach." Applied Mechanics and Materials 598 (July 2014): 529–33. http://dx.doi.org/10.4028/www.scientific.net/amm.598.529.

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The main purpose of this study is to prepare mathematical model for active vibration control of a structure. This paper presents the numerical and experimental modal analysis of aluminum cantilever beam in order to investigate the dynamic characteristics of the structure. The results will be used for active vibration control of structure’s experimental setup. Experimental natural frequencies are obtained and compared to verify the proposed numerical model by using modal analysis results. MATLAB System Identification Toolbox and ANSYS harmonic response function are used together to estimate bea

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Salim, Mohd Azli, A. Noordin, Mohd Zarhamdy Md Zain, and Abd Rahim Abu Bakar. "Dynamic Analysis on Noise and Vibration Study of Flexible Wiper Blade System." Advanced Materials Research 97-101 (March 2010): 4530–36. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4530.

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Chatter is one of the unwanted noise and vibration phenomenon which are generated during the wiper operation. It is a low frequency and self-excited vibration that is often generated before and after the wiper reverses its direction. This leads to a poor visibility and annoying sound to the driver and passengers. Therefore, this paper is aimed to propose a technique that can be apply to tackle this problem. Hence, an existing two-dimensional mathematical model of a wiper system available in the open literature is adopted. Firstly, the baseline model is simulated in order to observe its vibrati

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Wu, Yipeng, Hongli Ji, Jinhao Qiu, Weiqun Liu, and Jinling Zhao. "An internal resonance based frequency up-converting energy harvester." Journal of Intelligent Material Systems and Structures 29, no. 13 (2018): 2766–81. http://dx.doi.org/10.1177/1045389x18778370.

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Frequency up-converting vibration energy harvester can bridge the gap between high-frequency response and low-frequency input, greatly increasing the efficiency of energy conversion. This article proposed a novel frequency up-converting energy harvester based on 1:3 internal resonance in 2 degree-of-freedom cubic nonlinear systems. The harvester consists of two asymmetric cantilevers corresponding to two vibration degrees-of-freedom. The ratio of cantilevers’ first-order resonances is (or close to) 1:3. When excited frequency matches the resonant frequency of the first assisting cantilever, 1:

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Lepore, Francisco Paulo, Marcelo Braga Santos, and Rafael Gonçalves Barreto. "Identification of Rotary Machines Excitation Forces Using Wavelet Transform and Neural Networks." Shock and Vibration 9, no. 4-5 (2002): 235–44. http://dx.doi.org/10.1155/2002/967638.

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Unbalance and asynchronous forces acting on a flexible rotor are characterized by their positions, amplitudes, frequencies and phases, using its measured vibration responses. The rotary machine dynamic model is a neural network trained with measured vibration signals previously decomposed by wavelets. A typical compaction ratio of 2048:4 is achieved in this application, considering the stationary nature of the measured vibrations signals and the shape of the chosen wavelet function. The Matching Pursuit procedure, coupled to a modified Simulated Annealing optimization algorithm is used to deco

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14

Xu, Ruize, and Sang-Gook Kim. "MEMS Energy Harvesting from Low-frequency and Low-g Vibrations." MRS Proceedings 1782 (2015): 9–14. http://dx.doi.org/10.1557/opl.2015.657.

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ABSTRACTMEMS vibration energy harvesting has been investigated to provide energy to low-power micro-electronic systems and potentially to enable batteryless autonomous systems. While enjoying the small footprint hence the ability to be embedded in other systems, MEMS vibration energy harvesters are working at much higher frequencies and input vibration amplitudes. The mechanical resonator based energy harvesters seem inherently have such high frequency due to the scaling of the device dimension. Lower the working frequency range and input vibration amplitude are possible by optimizing the dime

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Wells, Stephen M., Stephen A. Hambric, and Timothy A. Brungart. "Case study: Simulating and measuring the vibration and radiated sound of a large industrial chiller." Noise Control Engineering Journal 70, no. 3 (2022): 207–30. http://dx.doi.org/10.3397/1/377017.

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This paper presents a case study for measuring and simulating the vibration and radiated sound for a large complex industrial chiller. We describe a simulation framework based on statistical energy analysis (SEA), which is populated using a hybrid mix of analytic, numerical, and measurement techniques. This hybrid approach was motivated by preliminary measurements of vibration and sound from the operating chiller, as well as a series of vibroacoustic transfer functions measured during quiescent non-operating conditions. Some components, like the chiller condenser shell, are modally dense and w

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Liu, Jiarong. "Three-dimensional finite element analysis of biological signal feedback in the mechanical properties of sound production." Molecular & Cellular Biomechanics 21, no. 1 (2024): 277. http://dx.doi.org/10.62617/mcb.v21i1.277.

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In response to the problems of low reliability and long time consumption in traditional research on sound production, this article used electromyography (EMG) signals as input signals to build a high-precision sound production mechanics model. A Proportional-Integral-Derivative (PID) controller was used to dynamically adjust the model and develop a real-time feedback system. This article established a detailed three-dimensional (3D) finite element model including the vocal cords and throat, defined the nonlinear elastic properties and linear elastic properties of different tissues, and used te

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17

Hong, Dongwoo, Hojoon Moon, and Byeongil Kim. "Feasibility Study on Active Structural Attenuation: Addressing Multiband Vibration in Automotive Vehicles on 2D Asymmetric Structures with a Faulty Horizontal Actuator." Symmetry 16, no. 6 (2024): 727. http://dx.doi.org/10.3390/sym16060727.

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This work presents a study on the modeling, analysis, and control of asymmetric source structures, which focuses on a multi-directional active mounting system that aims to consider the location and orientation of an actual automotive powertrain mount. An active mount was created by connecting a PZT (piezo-stack) actuator with a rubber grommet. Additional force necessary for every mount was determined by using forces caused by harmonic stimulation and the control input has the capability to reduce vibrations by engaging in detrimental opposition against the input. In addition, the vibration in

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18

Ma, Qi Hua, Jing Luo, and Chun Yan Zhang. "Fuzzy Controller for Semi-Active Automobile Suspension System under Random Profiled Road Input." Applied Mechanics and Materials 668-669 (October 2014): 474–77. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.474.

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The suspension system is one of the most important parts of the automobile. The suspension system has an important influence on the ride comfort and maneuverable stability of the automobile. As structure parameters of traditional passive suspension cannot adaptively change with external conditions, the improvement of dynamic performance is difficult. Tow-DOF and four-DOF suspension of vehicle model is set up in this paper. Under random profiled road input simulated by using Runge-Kutta method, the control laws of fuzzy controller are adjusted by using different weight coefficients and use Matl

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Hathout, J. P., and A. El-Shafei. "PI Control of HSFDs for Active Control of Rotor-Bearing Systems." Journal of Engineering for Gas Turbines and Power 119, no. 3 (1997): 658–67. http://dx.doi.org/10.1115/1.2817035.

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This paper describes the proportional integral (PI) control of hybrid squeeze film dampers (HSFDS) for active control of rotor vibrations. Recently it was shown that the automatically controlled HSFD based on feedback of rotor speed can be a very efficient device for active control of rotor vibration when passing through critical speeds. Although considerable effort has been put into the study of steady-state vibration control, there are few methods in the literature applicable to transient vibration control of rotor-bearing systems. Rotating machinery may experience dangerously high dynamic l

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Chang, You, and Stefan Stenfelt. "Characteristics of Bone-Conduction Devices Simulated in a Finite-Element Model of a Whole Human Head." Trends in Hearing 23 (January 2019): 233121651983605. http://dx.doi.org/10.1177/2331216519836053.

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Nowadays, many different kinds of bone-conduction devices (BCDs) are available for hearing rehabilitation. Most studies of these devices fail to compare the different types of BCDs under the same conditions. Moreover, most results are between two BCDs in the same subject, or two BCDs in different subjects failing to provide an overview of the results between several of the BCDs. Another issue is that some BCDs require surgical procedures that prevent comparison of the BCDs in the same persons. In this study, four types of skin-drive BCDs, three direct-drive BCDs, and one oral device were evalu

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Chitariu, Dragos-Florin, Florin Negoescu, Mihaita Horodinca, Catalin-Gabriel Dumitras, Gures Dogan, and Mehmet Ilhan. "An Experimental Approach on Beating in Vibration Due to Rotational Unbalance." Applied Sciences 10, no. 19 (2020): 6899. http://dx.doi.org/10.3390/app10196899.

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This paper proposes a study in theoretical and experimental terms focused on the vibration beating phenomenon produced in particular circumstances: the addition of vibrations generated by two rotating unbalanced shafts placed inside a lathe headstock, with a flat friction belt transmission between the shafts. The study was done on a simple computer-assisted experimental setup for absolute vibration velocity signal acquisition, signal processing and simulation. The input signal is generated by a horizontal geophone as the sensor, placed on a headstock. By numerical integration (using an origina

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Wu, Yubin, Ruixiang Song, Yanan Wu, et al. "Model test analysis of control effect of building foundation elastic pad on subway environmental vibration." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 4 (2023): 3391–96. http://dx.doi.org/10.3397/in_2022_0482.

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Building foundation elastic pad is one of the important measures for subway vibration control. In order to understand the subway vibration control effect of elastic pad on superstructure, two identical concrete test blocks were poured on site near a subway line. Taking the real subway vibration load as the input source strength, the vibration isolation effect of elastic pad on upper concrete mass block was compared and analyzed; At the same time, the influence of the backfill around the underground foundation of the building on the vibration isolation effect is simulated and analyzed. The back

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Ma, Ying Chen, Yan Wang, Ji Sheng Ma, and Hai Ping Liu. "Dynamic Simulation of 2K-H Differential Gear Train with Time-Varying Meshing Stiffness." Advanced Materials Research 314-316 (August 2011): 1603–6. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1603.

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Taking 2K-H differential gear train as study object, dynamic equation of torsion vibration was established with influence of time-varying meshing stiffness. The virtual-prototype with nonlinear meshing force was modeled using Virtual.Lab Motion software. Gear contact force was simulated, and it was verified by theoretical data. The reason of meshing vibration is analyzed. The results show that time-varying meshing stiffness is the main excitation of gear system, and gear system is vibratory although the input and output are stable, and the basic frequency is meshing frequency. This research la

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Saber, Fatima Ezzahra, Mohamed Ouahi, and Abdelmjid Saka. "Unknown Road Profile Input Estimation with Two Levels of Complexity Models." International Journal of Engineering Research in Africa 50 (September 2020): 113–30. http://dx.doi.org/10.4028/www.scientific.net/jera.50.113.

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Most advanced driver assistance systems (ADAS) are intended to improve ride comfort for vehicle suspension systems. A new road estimation method is proposed as a means of observing the road profile level. To achieve this, two complexity levels (quarter car and half car models) are presented and developed in Matlab to analyze the vertical vibration of a vehicle. The unknown input observers are then designed for observing unknown states and road profile level. The necessary measurements are the accelerations of the centers of the wheels. The results of simulations conducted with random road exci

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Tahkola, Mikko, Áron Szücs, Jari Halme, Akhtar Zeb, and Janne Keränen. "A Novel Machine Learning-Based Approach for Induction Machine Fault Classifier Development—A Broken Rotor Bar Case Study." Energies 15, no. 9 (2022): 3317. http://dx.doi.org/10.3390/en15093317.

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Rotor bars are one of the most failure-critical components in induction machines. We present an approach for developing a rotor bar fault identification classifier for induction machines. The developed machine learning-based models are based on simulated electrical current and vibration velocity data and measured vibration acceleration data. We introduce an approach that combines sequential model-based optimization and the nested cross-validation procedure to provide a reliable estimation of the classifiers’ generalization performance. These methods have not been combined earlier in this conte

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Sadeghi, Mohammad, Mohammad M. Bazrafkan, Marcus Rutner, and Franz Faupel. "Modeling of Magnetoelectric Microresonator Using Numerical Method and Simulated Annealing Algorithm." Micromachines 14, no. 10 (2023): 1878. http://dx.doi.org/10.3390/mi14101878.

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A comprehensive understanding of the linear/nonlinear dynamic behavior of wireless microresonators is essential for micro-electromechanical systems (MEMS) design optimization. This study investigates the dynamic behaviour of a magnetoelectric (ME) microresonator, using a finite element method (FEM) and machine learning algorithm. First, the linear/nonlinear behaviour of a fabricated thin-film ME microactuator is assessed in both the time domain and frequency spectrum. Next, a data driven system identification (DDSI) procedure and simulated annealing (SA) method are implemented to reconstruct d

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Shan, Xiaobiao, Henan Song, Chong Zhang, Guangyan Wang, and Jizhuang Fan. "Linear System Identification and Vibration Control of End-Effector for Industrial Robots." Applied Sciences 10, no. 23 (2020): 8537. http://dx.doi.org/10.3390/app10238537.

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This paper presents the discrete state space mathematical model of the end-effector in industrial robots and designs the linear-quadratic-Gaussian controller, called LQG controller for short, to solve the low frequency vibration problem. Though simplifying the end-effector as the cantilever beam, this paper uses the subspace identification method to determine the output dynamic response data and establishes the state space model. Experimentally comparing the influences of different input excitation signals, Chirp sequences from 0 Hz to 100 Hz are used as the final estimation signal and the exc

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Lee, W. C., Chae Sil Kim, H. O. Choi, Y. G. Jung, and Jung I. Song. "Vibration Characteristic Prediction of a Heavy Machinery Suspension Seat Using Multi-Body Dynamic Analysis Method." Advanced Materials Research 33-37 (March 2008): 1259–64. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.1259.

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This article proposes a novel simulation technique to predict the reasonable dynamic characteristics of a suspension seat for heavy machinery using a commercial multibody dynamic analysis code, ADAMS. The dynamic model is simulated with the specific condition such as sinusoidal and sweep input. The experiment test for actual suspension seat is conducted for reviewing the dynamic simulation model with same input condition. As the simulation results shows good agreements with experimental test results, the dynamic analysis model is reasonable and will be very helpful for predicting the dynamic c

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Jing, Hai Yan, Yan Ping Zheng, and Ming Xia Fang. "Study on Ride Comfort of Non-Linear Vehicle Vibration System." Applied Mechanics and Materials 215-216 (November 2012): 1043–46. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.1043.

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Based on the mathematical model of non-linear rubber bearings under the condition of random excitation and time domain model of road roughness, the 11-dof vibrant model for vehicle was built with considering the non-linear rubber bearings. Then the influence of the rubber bearings on ride comfort was simulated under the condition on the B-class road profile by different speed as the random input. The result shows that the way of modeling the vibrant model is feasible, and the influence is not a simple monotone function, especially in the barycenter acceleration of vehicle body.

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Lee, Chia-Fone, Jyh-Horng Chen, Yuan-Fang Chou, and Tien-Chen Liu. "THE OPTIMAL MAGNETIC FORCE FOR A NOVEL ACTUATOR COUPLED TO THE TYMPANIC MEMBRANE: A FINITE ELEMENT ANALYSIS." Biomedical Engineering: Applications, Basis and Communications 19, no. 03 (2007): 171–77. http://dx.doi.org/10.4015/s1016237207000227.

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A new type of electromagnetic vibration transducer designed to be placed onto the tympanic membrane will be developed. Such an electromagnetic transducer should have the following characteristics: small in size, high-energy efficiency and suitable frequency bandwidth. In order to find out the optimal electromagnetic force and to predict the frequency-amplitude characteristics, a finite element middle ear biomechanical model was used to derive the optimal magnetic force of the actuator in this study. First, the electromagnetic transducer coupled to the ear drum was created by using a computer-a

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Yang, Beibei, Yefa Hu, and Jinguang Zhang. "Modeling and H∞ Control of Active-Passive Vibration Isolation for Floating Raft System." Mathematical Problems in Engineering 2017 (2017): 1–18. http://dx.doi.org/10.1155/2017/5361702.

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This paper presents a new approach for constructing a mathematical model of the floating raft system directly from input-output measurements in the presence of noise. In contrast to the original OKID/ERA algorithm, which works through the observer Markov parameters, the new approach used observer output residuals to convert the initial stochastic identification to a virtually deterministic identification problem. The extension of deterministic algorithm to stochastic problems by proposed stochastic-to-deterministic conversion can be done with ease. A MIMO (multiple-input multiple-output) syste

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Li, Xue Ying, Zhuo Ping Yu, Zeng Liang Yu, and Lu Xiong. "Analysis of Vibration Characteristics Basing on a Multi-Rigid Suspension Model and a Multi-Flexible Suspension Model." Advanced Materials Research 748 (August 2013): 427–31. http://dx.doi.org/10.4028/www.scientific.net/amr.748.427.

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The torque vibration derived from in-wheel-motor transmitted to body frame through suspension system without the absorption of mechanical transmission parts, then excited every body panel to shape the vehicle interior noise, which influenced the quality of the vehicle NVH. This paper aims to build an accurate suspension system simulation model to analyze the influence of suspension parts parameters to system vibration transmission property. Basis on a novel empirical model of rubber bushing, a multi-rigid suspension model and a multi-flexible suspension model had been established respectively.

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Gharab, Saddam, Selma Benftima, and Vicente Feliu Batlle. "Fractional Control of a Lightweight Single Link Flexible Robot Robust to Strain Gauge Sensor Disturbances and Payload Changes." Actuators 10, no. 12 (2021): 317. http://dx.doi.org/10.3390/act10120317.

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In this paper, a method to control one degree of freedom lightweight flexible manipulators is investigated. These robots have a single low-frequency and high amplitude vibration mode. They hold actuators with high friction, and sensors which are often strain gauges with offset and high-frequency noise. These problems reduce the motion’s performance and the precision of the robot tip positioning. Moreover, since the carried payload changes in the different tasks, that vibration frequency also changes producing underdamped or even unstable time responses of the closed-loop control system. The ac

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Gong, L., and H. Hao. "Analysis of Coupled Lateral-Torsional-Pounding Responses of One-Storey Asymmetric Adjacent Structures Subjected to Bi-Directional Ground Motions Part I: Uniform Ground Motion Input." Advances in Structural Engineering 8, no. 5 (2005): 463–79. http://dx.doi.org/10.1260/136943305774858043.

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This paper presents results of a parametric study of seismic induced lateral-torsional-pounding responses of an asymmetric and a symmetric one-storey system subjected to bi-directional ground motion. The properties of the symmetric model are fixed, while the vibration frequency and eccentricity of the asymmetric model vary in the numerical computation. 20 sets of bi-directional horizontal earthquake ground motion time histories are numerically simulated for the analysis. All the simulated motions are compatible individually with the Newmark-Hall design response spectrum with 5% damping and nor

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Amirnudin, Amirul Adlan, Farahiyah Mustafa, Anis Maisarah Mohd Asry, and Sy Yi Sim. "Vibration Based Energy Harvesting Interface Circuit using Diode-Capacitor Topologies for Low Power Applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 4 (2017): 1943. http://dx.doi.org/10.11591/ijpeds.v8.i4.pp1943-1947.

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<span>A battery-less energy harvesting interface circuit to extract electrical energy from vibration has been proposed in this paper for low power applications. The voltage doubler integrated with DC – DC boost converter circuits were designed and simulated using MultiSIM software. The circuit was then fabricated onto a printed circuit board (PCB), using standard fabrication process. The Cockcroft Walton doubler was chosen to be implemented in this study by utilizing diode-capacitor topologies with additional RC low pass filter. The DC – DC boost converter has been designed using a CMOS

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Priyatmoko, Ricky, and Yoyong Arfiadi. "PREDICTION OF DYNAMIC PARAMETERS OF STRUCTURES BASED ON MODAL ANALYSIS USING FDD." Jurnal Teknik Sipil 15, no. 2 (2020): 99–104. http://dx.doi.org/10.24002/jts.v15i2.3718.

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Dynamic behavior and system identification are important topic in monitoring and maintaining existing infrastructures. System identification using Frequency Domain Decomposition (FDD) is an operational modal analysis (OMA) in frequency domain used on experiment of shear frame model with random vibration method is validated by comparing output of FDD data using acceleration input from simulated model with output of FDD using acceleration result of experimental model. The result of acceleration data is recorded using USB accelerometer X16-1D then calibrated and analyzed using Matlab programs, da

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Kuang, Jao-Hwa, Ah-Der Lin, and Tzong-Yow Ho. "Dynamic Responses of a Globoidal Cam System." Journal of Mechanical Design 126, no. 5 (2004): 909–15. http://dx.doi.org/10.1115/1.1767182.

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Dynamic equations of the intermittent-motion of a globoidal cam driven system were derived in this study. The effects of roller mesh flexibility and cam profile curve on the residual vibration of a globoidal cam system were studied experimentally and numerically. Time varying roller mesh stiffness and damping coefficients were used to account for the periodic variation of the mesh stiffness in the dwell and the active periods respectively. Dynamic responses of a globoidal cam system in the active and the dwell periods were simulated and measured. The effects of cam profile and input shaft spee

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Wang, Liang, Heran Wang, Yaxun Zhang, and Donghao Su. "Design and Analysis of a Micro Displacement Actuator Based on Stick-slip Principle Using Piezoelectric Ceramic." Journal of Physics: Conference Series 2706, no. 1 (2024): 012067. http://dx.doi.org/10.1088/1742-6596/2706/1/012067.

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Abstract This work introduces a triangular shape piezoelectric actuator using the principle of piezoelectric ceramic bending vibration and stick-slip motion. The lateral displacement of the driving foot is used to press the slider, while the vertical displacement is used to drive the slider. The structural dimensions are determined by simulation considering the required parameters. Finite element software is used to analyze the static performance. The dynamic performance of the actuator are simulated and analyzed, including its response to different input voltages and frequencies. Dynamic mode

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Hussien, Sharifah Yuslinda Syed, Hazriq Izzuan Jaafar, Rozaimi Ghazali, Liyana Ramli, and Mohd Khairul Azizat Johari. "Control of a Multimode Double-Pendulum Overhead Crane System Using Input Shaping Controllers." International Journal of Robotics and Control Systems 4, no. 3 (2024): 1490–505. http://dx.doi.org/10.31763/ijrcs.v4i3.1520.

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This paper investigates the impact of higher derivative input shaping for minimizing both oscillations, namely hook and payload of a multimode double-pendulum overhead crane (MDPOC) system. The MDPOC has greater nonlinearities and stronger internal couplings, especially when involving two oscillation frequencies with multimode dynamic effects. With a suitable system’s natural frequency and damping ratio of the hook and payload oscillations, multimode zero-vibration (ZV-ZV), multimode zero-vibration derivative (ZVD-ZVD) and multimode zero-vibration derivative-derivative (ZVDD-ZVDD) shapers are

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Manoj, K., V. Narayanamurthy, and S. Korla. "Performance of a Cantilever Energy Harvester under Harmonic and Random Excitations." Defence Science Journal 71, no. 2 (2021): 231–40. http://dx.doi.org/10.14429/dsj.71.15772.

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The technique of harvesting the energy from base structural vibration through a piezoelectric transducer attached at an appropriate location on the vibrating structure is gaining popularity in recent years. Although the amount of energy harvested depends on the type and magnitude of base excitation, the energy harvest under random excitation as compared to equivalent harmonic excitations is not yet well understood and is investigated in this paper through a cantilever energy harvester. Initially, the energy harvested under harmonic excitations is numerically simulated and experimentally valida

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Shi, Ying, Shan Ting Fang, Qing Yong Tian, and Wei Chen. "Spatial Numerical Analysis Method of Coupled Vibration between Whole Vehicle Model and Curved Bridge Caused by Bridge Deck Roughness." Advanced Materials Research 446-449 (January 2012): 1270–76. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.1270.

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In order to analyze the response and influencing factors from vehicle-bridge coupled vibration between curved continuous rigid frame bridge and whole vehicle model of 7 degrees of freedom, a spatial numerical analysis method of vehicle-bridge coupled vibration caused by bridge deck roughness was proposed. According to power spectrum density advised by GB/T 7031-2005, bridge deck roughness was simulated by the application of Fourier reverse transform. Because of delay of front and rear axles and correlation between left and right wheels, the roughness sequence of each wheel was obtained by the

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Li, Qihang, Weimin Wang, Lifang Chen, and Dan Sun. "Rotor-System Log-Decrement Identification Using Short-Time Fourier-Transform Filter." International Journal of Rotating Machinery 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/809785.

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With the increase of the centrifugal compressor capability, such as large scale LNG and CO2reinjection, the stability margin evaluation is crucial to assure the compressor work in the designed operating conditions in field. Improving the precision of parameter identification of stability is essential and necessary as well. Based on the time-varying characteristics of response vibration during the sine-swept process, a short-time Fourier transform (STFT) filter was introduced to increase the signal-noise ratio and improve the accuracy of the estimated stability parameters. A finite element mode

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Youfu, Tang, Wang Teng, Wang Tao, and Lei Na. "Research on Fault Diagnosis of Rolling Bearing Based on SEMSCNN and GRU Model." Journal of Physics: Conference Series 2184, no. 1 (2022): 012054. http://dx.doi.org/10.1088/1742-6596/2184/1/012054.

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Abstract In this paper, a deep neural network model fault diagnosis method based on the fusion of SENet-MSCNN and GRU is proposed to address the problem of low diagnosis rate caused by the fact that the normal samples are much larger than the fault samples in the collected rolling bearing vibration big data. The method takes the time-domain vibration signal as input and fuses the spatial features extracted by SE-MSCNN and the temporal features extracted by GRU to bring into the fully connected layer for identification, to realize the intelligent diagnosis of rolling bearing adaptive feature ex

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Rameshkumar, Thiyagarajan, Perumal Chandrasekar, Raju Kannadasan, Venkatraman Thiyagarajan, Mohammed H. Alsharif, and James Hyungkwan Kim. "Electrical and Mechanical Characteristics Assessment of Wind Turbine System Employing Acoustic Sensors and Matrix Converter." Sustainability 14, no. 8 (2022): 4404. http://dx.doi.org/10.3390/su14084404.

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Permanent magnet synchronous generator (PMSG)-based wind turbine systems have a wide range of applications, notably, for higher-rated wind energy conversion systems (WECS). A WECS involves integrating several components to generate electrical power effectively on a large scale due to the advanced wind turbine model. However, it offers several glitches during operation due to various factors, notably, mechanical and electrical stresses. This work focuses on evaluating the mechanical and electrical characteristics of the WECS using two individual schemes. Firstly, wind turbines were examined to

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Rahmatalla, Salam, Guandong Qiao, Rachel Kinsler, Jonathan DeShaw, and Andrew Mayer. "Stiffening Behavior of Supine Humans during En Route Care Transport." Vibration 4, no. 1 (2021): 91–100. http://dx.doi.org/10.3390/vibration4010008.

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Previous studies of human response to whole-body vibration demonstrated nonlinear softening behaviors with increasing vibration magnitudes. Most of these studies were conducted at relatively low vibration magnitudes of less than 3 m/s2 root mean square (RMS), and not much knowledge is available to show if this softening behavior exists when humans are exposed to higher vibration magnitudes. In this work, 26 participants were transported in a supine position inside an army medical vehicle on a road that simulated field scenarios and were exposed to input acceleration magnitudes at 0.60, 0.98, 1

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Dong, Guangming, Jin Chen, and Fagang Zhao. "Monitoring of the Looseness in Cargo Bolts under Random Excitation Based on Vibration Transmissibility." Shock and Vibration 2021 (May 7, 2021): 1–12. http://dx.doi.org/10.1155/2021/8841940.

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Bolted joints are widely used in industrial applications and joint failure can cause a disastrous accident if loosening happens. Bolt loosening detection can be made by regular manual inspection or by using sensors based on different physical principles, such as acoustoelastic effect, piezoelectric active sensing, and electromechanical impedance. Compared with the above methods, vibration based bolt looseness monitoring using accelerometers is appealing for its economy and convenience for measurement. In this paper, cargo bolts looseness monitoring under random excitation is studied based on v

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Yang, Wonseok. "Prediction of Flow Velocity from the Flexural Vibration of a Fluid-Conveying Pipe Using the Transfer Function Method." Applied Sciences 11, no. 13 (2021): 5779. http://dx.doi.org/10.3390/app11135779.

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This study presents a method to predict the flow velocity in a fluid-conveying pipe using vibration signals from the pipe surface. The flexural vibration of a fluid pipe is investigated through wave propagation. The wavenumbers and mode shapes of the pipe are determined based on its mechanical properties and flow velocities. The transient components of wavenumbers at low frequencies vary and converge on all values at higher frequencies as the flow velocity is increased. While the stationary fluid pipe exhibits symmetrical mode shapes, pipes with increasing flow velocities exhibit an asymmetric

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Liu, Xingyu, Jixing Che, Jiulin Wu, Wei Jiang, Rui Liu, and Yihui Zhao. "Integrated Dynamic Modeling and Simulation of Wheeled Vehicle with Outer-Rotor In-Wheel Motors and Key Units." Machines 12, no. 9 (2024): 624. http://dx.doi.org/10.3390/machines12090624.

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The purpose of this paper is to accurately establish a model of a special vehicle driven by in-wheel motors (IWMs) and investigate its dynamic characteristics. This study proposes a novel integrated vehicle modeling strategy, focusing on the IWM and other key subsystems. Based on this strategy, the vehicle model is developed and simulated in ADAMS. The natural frequencies of the vehicle and transmission characteristics of key components are compared with MATLAB simulation results to validate the accuracy of the model. In the time-domain analysis, the vehicle system’s time-domain characteristic

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Sun, Wei, Maolin Shi, Jieling Li, Xin Ding, Lintao Wang, and Xueguan Song. "Surrogate-Based Multisource Sensitivity Analysis of TBM Driving System." Shock and Vibration 2018 (July 3, 2018): 1–14. http://dx.doi.org/10.1155/2018/5187535.

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TBM cutterhead driving system is generally an extraordinarily large and complex machine containing lots of parameters; understanding and assessment of its dynamic characteristics are a great challenge as each of these parameters has uncertainty. In this work, a hierarchical modeling method for the dynamic model of the complex gear transmission system is proposed based on the generalized finite element modeling idea. On this basis, the whole machine dynamic model of cutterhead driving system is established; both the characteristics of vibration responses and the meshing force are revealed. Vibr

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Xu, Juncai, and Xiong Yu. "Pavement Roughness Grade Recognition Based on One-dimensional Residual Convolutional Neural Network." Sensors 23, no. 4 (2023): 2271. http://dx.doi.org/10.3390/s23042271.

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A pavement’s roughness seriously affects its service life and driving comfort. Considering the complexity and low accuracy of the current recognition algorithms for the roughness grade of pavements, this paper proposes a real-time pavement roughness recognition method with a lightweight residual convolutional network and time-series acceleration. Firstly, a random input pavement model is established by the white noise method, and the pavement roughness of a 1/4 vehicle vibration model is simulated to obtain the vehicle vibration response data. Then, the residual convolutional network is used t

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