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Through and comprehensive tests are necessary to ensure complete stability and reliability of AUV, due to the high risk and consumption of in field testing, onshore testing technology for AUV is proposed. Rudder load simulator plays an important role in the onshore testing of AUV. In this paper, the design and development of a rudder load simulator was discussed. Rudder load calculation method during...
An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach. The initial stiffness is very small but increases significantly with the displacement. In this...
Myoelectric control with surface EMG signal has achieved great success in clinics, but only limited to the control of 2-Degrees-of-freedom prosthesis. With the appearance of multiple-channel and high-density EMG system and the advances of pattern recognition technology, it becomes possible to control a multi-degree smart prosthesis using EMG signals. However, it requires high performance EMG systems...
The tensile testing machine was constructed for determination of true stress and strain of carbon steel and image processing technique was proposed to detect a projection diameter of the specimen for actual area calculation. The main components of the tensile testing machine consists of a hydraulic cylinder and a hydraulic unit to proceed the tension force, upper and lower grippers to clamp the specimen,...
The objective of this work is to introduce an autonomous Hovercraft with minimum Energy consumption. To achieve this goal, a computer simulation in addition to practical testing of a simple hovercraft model have been carried out. A mathematical model for the hovercraft is considered and simulated in the MATLAB/SIMULINK environment. A navigation system with Global Positioning System (GPS) integrated...
An experimental investigation was conducted to study the crush-worthiness parameters and behaviour of the bamboo-epoxy composite tube with chamfering angle 45° at one end. Quasi-static compressive loadings were applied axially to investigate the response of force-displacement during progressive collapses. The Shimadzu concrete compression testing machine with capacity 2000 KN was used in this experiment...
This paper presents a preliminary study for a virtual reality simulation for testing the behavior of electric propulsion systems in electrical traction applications. The car model is realized and connected to the propulsion model in MATLAB Simulink whereas the inputs for the model are coming from the Virtual Reality Environment (VRE).
Numerous endeavors have been made in creating automated post-stroke hand rehabilitation and assistive devices over the last decade. An extensive variety of actuators have been investigated in directing the patients' finger to maneuver in a natural path. Despite the fact that their execution is considered satisfactory for some typical undertakings, there is ample room for improvement by applying late...
Mechatronic rehabilitation devices, especially wearables, have been researched extensively and proven to be promising additions to physical therapy, but most designs utilize traditional actuators providing unnatural, robot-like movements. Therefore, many researchers have focused on the development of actuators that mimic biological properties to provide patients with improved results, safety, and...
The paper presents the design and construction of an experimental stand for in vitro testing of total hip and knee prosthetics. It is composed of a pneumatic circuit (two pneumatic cylinders, a rack-piston oscillating motor), an electric circuit (an electric motor of 24 V DC, a power source, a command and control circuit), a device for cycles number counting, sensors for acceleration, rotational speed...
Restoring normal walking abilities following the loss of them is a challenge. Importantly, there is a growing need for a better understanding of brain plasticity and the neural involvements for the initiation and control of these abilities so as to develop better rehabilitation programmes and external support devices. In this paper, we attempt to identify gait-related neural activities by decoding...
Recently, the electronics industry is moved maturely on the mobile/tablet market. The next fast growing opportunity market will be the Internet of Things (IoT) and Wearable Deivces in the near future. This advanced technology/package need to provide the ideal solution for small form factor, thin profile, high electrical performance, multi-function integration and low cost are the most critical requirements...
Over the past few years, temporary bonding has expanded together with the development of 3D stacked IC (SIC) technology. As maturity of the various processes has constantly improved, process yield and process impact on device performance have become key questions to answer. To further answer the refraining elements preventing a more massive technology adoption, in-line testing of the device throughout...
Many areas of robotics, particularly locomotion and grasping, can benefit from the ability to modulate friction on surfaces that come into contact with objects in the environment. Previous research has tried to address the challenge of tunable friction; however, those efforts only provide modest gains or are difficult to integrate. We propose a tunable friction mechanism that relies on pneumatic actuation...
This paper presents the design of a flexure-based precision positioning micro-motion stage system with constant output force. The stage mechanism is devised using folded leaf flexure (FLF) to achieve positive-stiffness structure. Bistable beams are employed to design negative-stiffness structure by using their buckling characteristics. Two bistable beams and two FLFs are combined together as a zero-stiffness...
The lateral line sensory system found in fish and other aquatic organisms is believed to aid in various behavioral activities such as station keeping and wall detection. This paper presents results for an artificial lateral line designed for use in an underwater vehicle. Algorithms for leveraging this system to estimate hydrodynamic forces and for wall detection are presented and experimentally validated...
In this paper, we investigated the effect of scratching direction in AFM scratching. The understanding of this effect is one of the key factors in the patterning process. In our experiment, several testing grooves were engraved in all four basic directions (forward, backward, right and left) on polycarbonate substrate using Si probe. Both the fabrication and subsequent characterization were performed...
Safety of transport means is a priority for manufacturers and it is a subject of strict standards. The present article describes a method for measurement of displacement in compression tests of forks arm of the motorcycle made from aluminum alloy AlSi7Mn0.3. The test is performed on the universal hydraulic press. The standard output of this test is a stress stain diagram that will give us information...
Modern DRAM-based systems suffer from significant energy and latency penalties due to conservative DRAM refresh standards. Volatile DRAM cells can retain information across a wide distribution of times ranging from milliseconds to many minutes, but each cell is currently refreshed every 64ms to account for the extreme tail end of the retention time distribution, leading to a high refresh overhead...
This paper presents a universal self-aligned in situ on-chip micro tensile fracture strength tester designed for tensile strength extraction and process evaluation, which will provide, for the first time as far as the authors know, great force(above 100mN) to in situ on-chip specimen without the introduction of precise instrument, especially suitable for bulk micromachining related tests. The whole...
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