Results 11 to 20 of about 96,271 (199)

Design of A Novel Wheel-Legged Robot with Rim Shape Changeable Wheels

open access: yesChinese Journal of Mechanical Engineering, 2023
The wheel-legged hybrid structure has been utilized by ground mobile platforms in recent years to achieve good mobility on both flat surfaces and rough terrain. However, most of the wheel-legged robots only have one-directional obstacle-crossing ability.
Ze Fu, Hao Xu, Yinghui Li, Weizhong Guo
doaj   +1 more source

Experimental study of controlling tip clearance flow in a pump-jet propulsor

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectiveThis paper aims to suppress the adverse effects of tip clearance flow on the hydrodynamic performance and unsteady excitation force of a pump-jet propulsor. MethodAs for the pre-swirl stator pump-jet propulsor, an annular flexible seal structure
Ruilin HAN   +5 more
doaj   +1 more source

Subjective Preferences and Discomfort Ratings of Backrest and Seat Pan Adjustments at Various Speeds

open access: yesApplied Sciences, 2021
Power seats (i.e., electrically adjustable seats that can be designed to move in several ways) have become increasingly common in airplanes, vehicles, and offices.
Jingdong Li, Yu Huang
doaj   +1 more source

Modeling of the Through-the-Thickness Electric Potentials of a Piezoelectric Bimorph Using the Spectral Element Method

open access: yesSensors, 2014
An efficient spectral element (SE) with electric potential degrees of freedom (DOF) is proposed to investigate the static electromechanical responses of a piezoelectric bimorph for its actuator and sensor functions.
Xingjian Dong   +3 more
doaj   +1 more source

Randomized resonant metamaterials for single-sensor identification of elastic vibrations

open access: yesNature Communications, 2020
Designing efficient and flexible metamaterial with uncorrelated transmissions for spatial vibration encoding and identification remains a challenge. Here, the authors propose a randomized resonant metamaterial with randomly coupled local resonators for ...
Tianxi Jiang   +3 more
doaj   +1 more source

Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements

open access: yesShock and Vibration, 2010
This article uses frequency domain transmissibility functions for detecting and locating damage in operational conditions. In recent articles numerical and experimental examples were presented and the possibility to use the transmissibility concept for ...
Christof Devriendt   +6 more
doaj   +1 more source

A Comparative Study on Kinematic Calibration for a 3-DOF Parallel Manipulator Using the Complete-Minimal, Inverse-Kinematic and Geometric-Constraint Error Models

open access: yesChinese Journal of Mechanical Engineering, 2023
Kinematic calibration is a reliable way to improve the accuracy of parallel manipulators, while the error model dramatically affects the accuracy, reliability, and stability of identification results.
Haiyu Wu   +4 more
doaj   +1 more source

Segment-Wise Decomposition of Surface Electromyography to Identify Discharges Across Motor Neuron Populations

open access: yesIEEE Transactions on Neural Systems and Rehabilitation Engineering, 2022
Objective. The surface electromyography (EMG) decomposition techniques have shown promising results in neurophysiologic investigations, clinical diagnosis, and human-machine interfacing.
Chen Chen   +4 more
doaj   +1 more source

Phase-Locked Time-Shift Data Augmentation Method for SSVEP Brain-Computer Interfaces

open access: yesIEEE Transactions on Neural Systems and Rehabilitation Engineering, 2023
Steady-state visual evoked potential (SSVEP) based brain-computer interfaces (BCIs) have achieved an information transfer rate (ITR) of over 300 bits/min, but abundant training data is required.
Ximing Mai   +4 more
doaj   +1 more source

Bio-inspired nano rotor investigation based on UVLM

open access: yesBiosurface and Biotribology, 2019
Nano rotor is of great value in military and civilian applications. Due to its nano size, it works at an ultra-low Reynolds number and aerodynamic performance deteriorates dramatically.
Zhao Shanyong   +4 more
doaj   +1 more source

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