scholarly journals High‐Output Force Electrohydraulic Actuator Powered by Induced Interfacial Charges

2021 ◽  
Vol 3 (5) ◽  
pp. 2170045
Author(s):  
Hyunwoo Kim ◽  
Jihyeong Ma ◽  
Minki Kim ◽  
Jongseok Nam ◽  
Ki-Uk Kyung
Keyword(s):  
Output Force ◽  
High Output ◽  
Electrohydraulic Actuator

Linear Thermomechanical Microactuators

1999 ◽  
Author(s):  
Rebecca Cragun ◽  
Larry L. Howell
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Expansion ◽  
Cross Sections ◽  
Variable Cross ◽  
Element Analysis ◽  
Thermal Actuators ◽  
Output Force ◽  
Analysis Models ◽  
High Output

Abstract Thermomechanical in-plane microactuators (TIMs) have been designed, modeled, fabricated, and tested. TIMs offer an alternative to arrays of smaller thermal actuators to obtain high output forces. The design is easily modified to obtain the desired output force or deflection for specific applications. The operational principle is based on the symmetrical thermal expansion of variable cross sections of the surface micromachined microdevice. Sixteen configurations of TIMs were fabricated of polysilicon. Finite element analysis models were used to predict the deflection and output force for the actuators. Experimental results were also recorded for all sixteen configurations, including deflections and output forces up to 20 micron and 35 dyne.

The Characteristics of Variable Speed Inchworm Stage Using Lever Mechanism by Different Materials

2008 ◽  
Vol 8 (11) ◽  
pp. 5696-5701 ◽  
Author(s):  
Yong Woo Kim ◽  
Soo Chang Choi ◽  
Jeong Woo Park ◽  
Yoong Ho Jung ◽  
Deug Woo Lee
Keyword(s):  
Dynamic Range ◽  
Input Voltage ◽  
Variable Speed ◽  
Output Displacement ◽  
Output Force ◽  
Ultra Precision ◽  
Lever Mechanism ◽  
Feeding Speed ◽  
Performance Results ◽  
High Output

Currently, piezoelectric actuators which have attractive features such as high output force, high positioning resolution, high stiffness and quick response have been used in many ultra precision stages. But their positioning ranges are very small. This very limited displacement severely restricts the actuator's immediate implementation for long-range positioning. This paper shows a variable speed inchworm type stage with hinge structures as lever mechanism for nanometer resolution with large dynamic range and studies on characteristics of it. The inchworm stage has hinge structure levers which can shift their pivot position. And it can amplify/reduce output displacement using mechanical advantage with a lever. Especially we suggest guide-line of design according this work that was performed using different materials of stages (Aluminium and Stainless Steel). As the results of simulations, the larger lever ratio is, the smaller stiffness of lever portion is. As the results of experiments, when we input voltage into the inchworm stage, output displacement of each lever is different according to material. Hysteresis of stage could also present that grow according as lever rate rises and stiffness of material. In the case of feeding speed, Aluminium with less hardness showed excellent responsiveness, hence excellent feed performance results.

Design Factors Influencing Power Reduction in Thermomechanical In-Plane Microactuators

2007 ◽  
Author(s):  
John N. Harb ◽  
Scott M. Lyon ◽  
Jenny Larsen ◽  
Larry L. Howell ◽  
Timothy W. McLain
Keyword(s):  
Steady State ◽  
Input Voltage ◽  
Input Power ◽  
Power Reduction ◽  
Heat Losses ◽  
Efficient Design ◽  
Environment Change ◽  
Output Force ◽  
Design Factors ◽  
High Output

The TIM (Thermomechanical In-plane Microactuator) is a thermal actuator that offers a high output force at a low input voltage, in a design that can be easily modified to match force and displacement requirements of various applications. The purpose of this paper is to examine factors that affect the steady-state power requirements of a TIM. Reducing the power requirements of the TIM is critical for its use in some systems such as autonomous microsystems. The influence of several geometric modifications and one environment change on energy loss and actuator efficiency was investigated. The steady-state deflection of five different TIM designs was measured for various levels of input power in both air and vacuum. The extent of the power reduction for the most efficient design in air varied with deflection from about 40 percent at 4 μm deflection to 20 percent at a deflection of 8 μm. The most significant reduction in power was observed for devices tested under vacuum where conduction from the legs through the air to the substrate was minimal due to reduced heat losses at the low pressure.

007 Development of Large Deformation and High Output Force Type Active Laminate

2006 ◽  
Vol 2006.14 (0) ◽  
pp. 25-26
Author(s):  
Hiroshi ASANUMA ◽  
Toshiyuki NAKATA ◽  
Toshiaki TANAKA ◽  
Osamu HAGA
Keyword(s):  
Large Deformation ◽  
Output Force ◽  
High Output

Robotic Visible Forceps Manipulator With a Novel Linkage Bending Mechanism

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Boyu Zhang ◽  
Zhuxiu Liao ◽  
Penghui Yang ◽  
Hongen Liao
Keyword(s):  
Minimally Invasive Surgery ◽  
Mechanical Performance ◽  
Surgical Instruments ◽  
Robotic Systems ◽  
Flexible Manipulators ◽  
Surgical Operation ◽  
Single Function ◽  
Output Force ◽  
Bending Mechanism ◽  
High Output

In minimally invasive surgery (MIS), surgeons often suffer from occlusion region problems. It is difficult to solve these problems with traditional surgical instruments because of their size and rigid mechanical structure, such as endoscopes and corresponding operating tools. Thus, flexible manipulators and related robotic systems have been proposed for enhancing intraoperative inspection and surgical operation in MIS. Although a variety of flexible manipulators using different mechanisms have been developed, most of them are designed with a single function. In this paper, we present the concept of visible forceps that enriches the forceps function, which realizes the flexible bending capability and high output force, as well as the integrated endoscopic function. We developed a novel simplified linkage bending mechanism for forceps with a bendable tip and fabricated a robotic visible forceps manipulator system. According to this prototype, we performed experiments to evaluate the mechanical performance and the abdominal phantom test to evaluate the feasibility and usefulness. Preliminary results show that the forceps manipulator can realize both flexible bending capability and high output force, which implies promising applications in future MIS.

Deformable ferrofluid-based millirobot with high motion accuracy and high output force

2021 ◽  
Vol 118 (13) ◽  
pp. 134101
Author(s):  
Dixiao Chen ◽  
Ziping Yang ◽  
Yiming Ji ◽  
Yuguo Dai ◽  
Lin Feng ◽  
...  
Keyword(s):  
Output Force ◽  
High Output

Dynamic Behaviour of a Novel Compliant MEMS Force Amplifier by MATLAB/SIMULINK

2012 ◽  
Vol 468-471 ◽  
pp. 1541-1547
Author(s):  
Ergin Kosa ◽  
Levent Trabzon ◽  
Umit Sonmez
Keyword(s):  
Dynamic Behaviour ◽  
Input Function ◽  
Dynamic Mode ◽  
Matlab Simulink ◽  
Crank Angle ◽  
Output Force ◽  
Compliant Systems ◽  
Micro Actuators ◽  
Monolithic Structure ◽  
High Output

High force amplification in micro-scale can be achieved by MEMS compliant systems and such systems have been recently preferred to obtain high output forces in micro actuators due to its monolithic structure and ease of fabrication. We studied the mechanism of novel MEMS force amplifier in dynamic mode by modeling its rigid body mechanism with Matlab/Simulink programming. Kinematic analysis and dynamic response of the MEMS compliant system was obtained by modeling of velocity and acceleration parameters, and ramp input function, respectively. We found that the output force goes to infinity at zero-crank angle and there is 2650 times force amplification by a given very small crank rotation about 2.30.

Development and Application of a High-Thrust Voice Coil Motor

2013 ◽  
Vol 718-720 ◽  
pp. 1677-1681
Author(s):  
Gang Chen ◽  
Qiang Lin ◽  
Lei Wang ◽  
Xu Chen
Keyword(s):  
Heat Dissipation ◽  
Voice Coil Motor ◽  
Cyclic Stress ◽  
Precise Positioning ◽  
Output Force ◽  
The Stability ◽  
Deformation Tests ◽  
High Thrust ◽  
High Output

A Voice Coil Motor (VCM) for precise positioning with high output force was designed. The stability and heat dissipation of VCM were analyzed. The performance of VCM was also compared with that of the same type VCM produced by SMAC. Uniaxial ratcheting behavior of solder wire (Sn63/Pb37) was studied by uniaxial cyclic stress controlled tension deformation tests,to verify the VCM systematically.

scholarly journals A Wearable Soft Tactile Actuator With High Output Force for Fingertip Interaction

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 30206-30215
Author(s):  
Jung-Hwan Youn ◽  
Heeju Mun ◽  
Ki-Uk Kyung
Keyword(s):  
Output Force ◽  
High Output
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