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In the present work, aiming at meeting the requirements of flexibility and three-dimensional force detection, a novel tactile sensor based on conductive and insulating rubbers was designed. Specifically, the microstructural unit consisting of three columns was orderly arranged in the cuboid made up of insulating rubbers. The microstructural units were prepared by conductive rubbers. According to the...
The paper aims to examine the influence of vibration to the behavior of the electrical contact resistance in electrical equipment. The paper analise the influence of vibration on independent axes and combination of the vibration axe. The analise of the electrical contact resistance during vibration,it is made both on normally closed contacts, and on normally open contacts.
It is of great significance for the research of wind load in energy saving and emission reduction as wind load is one part of the ship total loads. An inland cruise ship is chosen as a research object, the wind loads on the ship including longitudinal and transverse forces and the yaw moment are calculated in wind angle of 0–180° by using CFD method, and then the numerical result is compared with...
As traditional CMOS scaling reaches fundamental limits, there is an increasing interest in non-charge based beyond CMOS devices that could increase the functionality of logic chips [1]. Ferroelectric tunnel junction (FTJ) devices are attractive due to their large ON/OFF ratios, non-volatile, and low energy operation [2]. Switching has been demonstrated in the metal-ferroelectric-metal (M-F-M) FTJs...
In this paper, we explore key design parameters for integrating fluidic logic and actuators for a very-large shape display for application in braille and tactile graphics. We present a simple model of pressure-controlled flow valves, which are analogous to electric transistors. The model is used to highlight the design of a valve that achieves hysteresis (noise immunity) and pressure-gain (signal...
A hardware-in-the-loop (HIL) model of a vessel electric propulsion drive is proposed. The mathematical description of the vessel trust forces is explained. As well, the propulsion power and torque estimates are discussed within the broad spectre of their parameter changing. A case study is reported where some concrete parameters are applied in the above mathematical model to assess the particular...
Organic and polymer-based resistive memory cell sandwiched between two vertically aligned electrodes constitute crossbar memory arrays in which the building blocks, referred to as bit cells, possess two or multiple stable resistance states.1 They are promising circuit elements due to their good scalability and processability, high possibility of molecular design through chemical synthesis, high storage...
Aiming at mimicking water strider's water-surface locomotion, this study proposes a new miniature surface tension-driven robot. A key feature of this robot is that its actuating legs possess ellipse-like spatial trajectories like water strider by using a cam-link mechanism, and never pierces water surface when rowing. A set of simple models and equations are proposed to analyze the interaction forces...
The mechatronic system with variable parameters operating under varying conditions discussed in this paper refers to an electric drive system for winding a strip with constant linear velocity on a drum. The continuously variation of the plant inputs, namely reference and load disturbance, is determined by the increasing radius and hence moment of inertia of the drum. This paper suggests a conventional...
During re-entry operations in offshore drilling, the drill pipe needs to be monitored in order for the drillship to maintain or change its position. In oil and gas drillings, conventional remotely operated vehicles (ROVs) are used for such operations. However, in scientific drillings, conventional ROVs cannot be used because target water depths can be as large as 7,000 m. The scientific drilling vessel...
This paper considers the hierarchical control strategy for enhancing the captured and converted powers in heaving wave energy converters. The hierarchical control strategy consists of a higher hierarchical controller (HHC) and a lower hierarchical controller (LHC). The main role of the HHC is to provide the optimum reference for the LHC. The LHC follows the reference despite the existence of perturbations...
Difficulties in automatic handling of many food materials are due to their softness and easy deformability by external forces. Excessive deformation of food materials damages their quality and must be avoided. Another difficulty in automatic food handling is the irregular shape and size of food materials, requiring robotic hands to adjust for differences in shapes and sizes. This study describes binding-based...
A double-pole single-throw latching MEMS switch is presented, which could be used as reconfiguration switches in telecommunication networks. The switch can latch into a closed state so that no energy is needed to stay in that state. The latching mechanism was operated using thermal actuators which use a polysilicon heater underneath the structural layer. Using the MetalMUMPs technology, the switch...
The problem of energy-optimal control for rail vehicles under constraints and fixed arrival time is considered. The nonlinear train model with quadratic overall resistance force is approximated with a piecewise affine model. The optimal control law - train traction/braking force as a function of train speed and traversed path - is pre-computed off-line with the dynamic programming procedure. The optimal...
This paper deals with an idle speed control design approach that is able to cover the idle operating range at standstill and also during dead start. Thus the common dead start controller becomes dispensable. For this feasibility study a validated nonlinear simulation model of the entire powertrain helps to evaluate the performance of the closed-loop system. Furthermore, experimental results show the...
The height adjustable wheel chair focuses on meeting the needs of paraplegics' patients and the poor disabled persons who desire to perform certain tasks independently and privately, such as picking items from shelves, cupboard and wardrobes at the standing height of average human being. Hence, an appropriate wheelchair to meet their need has been designed using low cost and readily available materials...
The needle winding technology is distinguished by a high degree of flexibility and automation. However, high wire tension due to the tensile winding force proves to be detrimental. Wire stress can cause an increase of the ohmic winding resistance, thus leading to a decrease of the degree of efficiency and a reduction of the continuous power of an electric machine. A closed-loop-control of the tensile...
Force Sensitive Resistors (FSRs) are used for kinetic evaluation of human gait by measuring under foot pressures during gait. FSRs from different manufacturers, with variation in morphologies and loading capacities were selected in past research projects. However a functional comparison of different FSRs and options on how to choose them for gait analysis is not established yet. In this work, investigation...
This research clarified the anomalous electric resistance change of ultrastrained multi-walled carbon nanotube (MWCNT), as well as its mechanical properties, using the Electrostatically Actuated NAnotensile Testing device (EANAT) mounted on the in-situ SEM nanomanipulation system. The Young's modulus of MWCNT and its shear stress during interlayer sliding deformation were estimated from the load-displacement...
This paper studied a triboelectric and piezoelectric coupling nanogenerator based on MEMS technology. The electrospinning PVDF-TrFE nanofibers are not only used as a piezoelectric functional layer, but also as a friction layer of triboelectric generator. The other flexible friction layer is realized by PDMS films with doped multiwall carbon nanotubes (MWCNT). The sandwich-shaped nanogenerator's triboelectric...
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