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According to WHO, around a billion people with disabilities live in the world. About one third of these people are people with mobility or movements impairments. For most of these people, high-precision hand prostheses such as bebeonics or touchebonus are very expensive. Prosthetics controlled from the nervous system directly exist only as prototypes. All of the above devices provide only visual feedback...
Visually impaired people are neglected from many modern communication and interaction procedures. Assistive technologies such as text-to-speech and braille displays are the most commonly used means of connecting such visually impaired people with mobile phones and other smart devices. Both these solutions face usability issues, thus this study focused on developing a user friendly wearable solution...
In order to further improve the riding comfort of trackless rubber tire vehicle, to ensure the safety of coal mine underground transportation, a quarter vehicle of the dynamics equation was established for two-degree of freedom suspension system. And the underground road roughness value of the input signal was calculated. Then based on the Simulink module of MATLAB software, the mathematical simulation...
In this paper, the research of the dynamics for the constant force polishing robot system as the goal, through the establishment of the dynamics equations for the end of the robot polishing, a modal analysis of the end of the robot is analyzed. It is obtained its static characteristic and vibration characteristics by the analysis results and verified the meeting requirements of the stiffness and the...
Industrial Internet of Things (loT) brings more innovation space to the construction machinery industry. However, currently the application of IoT in vibratory roller is mainly reflected on the remote control of asset security and the basic data monitoring of equipment operation. In order to improve the intelligent level of vibratory roller and promote intelligent compaction on road construction,...
Multi-degree of freedom manipulators have become a hotspot in the field of robotics because of many advantages. In this paper, a 5-DOF manipulator was taken as the object of study. The modal analysis on it was carried out by methods of test and finite element analysis. A model updating method based on sensitivity analysis was put forward, and the final finite element model was established by iterative...
Study of electron transport in nanopillar transistor at 300K shows that elastic vibration is an intrinsic behavior of the device. The frequency observed in the drain-source current is found to agree with the charging frequency. Given a quantum dot of size 10×10×9nm3, the maximum displacement is estimated to be 0.3nm. Once the displacement diminishes to zero, single-electron tunnel becomes the dominating...
A novel vibrating ring gyroscope is proposed in this paper, and the structure employs axisymmetric ring resonator and capacitance transducers. Motion characteristics of the ring resonator and the setting of the capacitance electrodes are discussed in detail. The simulation results demonstrate that the natural resonant frequency of the operating mode of the gyroscope is 8.805 kHz and 8.807 kHz, and...
The paper is dedicated to a direct sensitivity analysis of a generic piezoelectric energy harvester working in a fluid flow. The aim of the analysis is to obtain a better knowledge about such kind of devices. The energy harvester has a beam-type structure which incorporates a piezo-active material. Under the action of the fluid flow induced forces the structure performs random vibrations. Due to the...
We introduce a Quantum Electrodynamics (QED) approach to describe inelastic scattering processes of molecules in atomic-scale plasmonic picocavities. By solving the corresponding optomechanical dynamics, we identify nonlinear inelastic signals related to vibrational pumping, together with dynamical backaction and strong correlations of the photons emitted.
This article discusses the issues related to diagnosing the vibrational activity of marine engines. The authors introduce the method of assessment developed by them marine engine vibroactivity, generated by the gas dynamics and mechanical factors. This method of vibrational diagnostics can be effectively used to solve the problem of ensuring the operational status of marine engines both at the design...
We describe a design for an “audio display”, a loudspeaker that employs the bending vibrations of a panel, such as flat-panel television screen or projection surface, to render localized sound sources anywhere on the surface of the panel. The method employs a two-dimensional Fourier series reconstruction of the desired panel spatial vibration profile, and an array of force actuators affixed to the...
Poor form of body mechanics has been attributed to as a major risk factor for lower back injuries, which costs billions of dollars a year in the US alone. In this paper, we report a case study on using a Kinect-based system during an annual competency training at a local nursing home to promote safe resident handling. Each participant of the study was asked to perform three specific bedside care tasks...
To predict the vibration displacement distributed on a vibrating surface, an r order Non-equidistant Grey Model (r-NGM) is proposed in this paper. This model is built by accumulating the initial discrete non-equidistant vibration displacement set with the r order Accumulated Generating Operation (r-AGO). The r-NGM is applied to a vibrating surface of a shaker to displacement prediction. The experimental...
This paper presents a novel approach for remaining useful life (RUL) prediction of rotating machinery using hierarchical deep neural networks (DNN). The different health stages are classified by a DNN-based health stage classifier trained by segmented degradation signal. This method builds several RUL predictors based on the health stages of the degradation process. Instead of modeling the entire...
It is very important to analyze the dynamic characteristics for the crankshaft during the working process. By use of ANSYS software of finite element model of the crankshaft modal analysis to get the top 20 order natural frequency and the corresponding vibration mode, and put forward the possible resonance risk and design concerns. It has some guiding significance for the design and manufacture of...
The aim of this paper is to present a detailed method for investigating the behavior of a tall and slender building subjected to turbulent wind action. The main objective of the study is to provide a calculation method of the dynamic response based on the wind tunnel experimental tests results, in orders to achieve a clear image of wind effects on such buildings. Wind tunnel tests were performed on...
The paper considers the problem of change detection and diagnosis (CDD) in vibration analysis, from the point of view of challenges and solutions. In this framework, Matlab Toolbox VIBROTOOL is presented, implementing functions for change detection and diagnosis in vibration engineering. Compared to other toolboxes in the same domain, Matlab VIBROTOOL Toolbox promotes blind source separation and advanced...
The marine industry is seeing an increasing number of vessels equipped with electric propulsion opposed to traditional mechanical propulsion. Electric propulsion has been shown to be advantageous in various land applications such as locomotives and road vehicles however in the marine setting the highly variable hydrodynamic load exposes the electric propulsion system to extreme load conditions. This...
We present a circuit for strain and vibration sensing from piezoelectric film elements (PVDF). The target application is the monitoring of low-frequency vibration in a biomedical wearable device. Since standard PVDF sensors produce an open-circuit voltage that is too large for direct amplification on an integrated circuit, the circuit performs input signal folding as well as output voltage attenuation...
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