Research on Walking Mechanism Base on Biological Metal Fibre

2013 ◽  
Vol 785-786 ◽  
pp. 1267-1272
Author(s):  
Shi Ju E ◽  
Xuan Zhong Ding
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Trajectory Planning ◽  
New Type ◽  
Simulation Results ◽  
Metal Fibre ◽  
Walking Mechanism

A new walking mechanism base on biological metal fibre is study in the paper. It used a new type of shape memory alloy (biological metal fibre, BMF) as actuator. The multilegged walking mechanism is employ and study. Its mobile mechanism and trajectory planning is analysed so as to achieve miniaturization goals. The simulation results showed that the multilegged walking mechanism could be effectively driven by the actuator base on BMF.

1914 New type stents using shape memory alloy

2005 ◽  
Vol 2005.1 (0) ◽  
pp. 481-482
Author(s):  
Kiyoshi YAMAUCHI ◽  
Yuji SUTOU ◽  
Takamitu TAKAGI ◽  
Toshio SAKUMA
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
New Type

Modelling and simulation of a novel shape memory alloy actuated compliant parallel manipulator

2008 ◽  
Vol 222 (6) ◽  
pp. 1049-1059 ◽  
Author(s):  
M Sreekumar ◽  
T Nagarajan ◽  
M Singaperumal
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Compliant Mechanism ◽  
Linear Analysis ◽  
Structural Member ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Complex Behaviour ◽  
Spatial Parallel Mechanism ◽  
Simulation Results

This paper presents the non-linear analysis of a shape memory alloy (SMA) actuated fully compliant spatial parallel mechanism. A compliant mechanism made of SMA wires as its actuators and SMA pipe as its structural member that exploits both the shape memory and superelastic effects is proposed and its static analysis using ANSYS is presented in this study. Finite element analysis in a multi-physics environment considering geometric and material non-linearities helps the user to analyse complex behaviour of a system. For the proposed mechanism, simulation results show: (a) 4 per cent strain for SMA actuation is optimal considering the geometric non-linearity of the proposed mechanism for obtaining maximum displacement; (b) buckling effect is less predominant while implementing the superelastic behaviour; and (c) the mechanism can be designed as a compliant device with one or more inflexion points by exploiting the superelasticity of the SMA pipe. The knowledge obtained from the simulation study could help in further miniaturization of the manipulator.

Active Vibration Control of a Double-Decker Cantilever Beam Using Shape Memory Alloy

2012 ◽  
Vol 226-228 ◽  
pp. 252-256
Author(s):  
Xin Yang ◽  
Jie Hong ◽  
Yan Hong Ma ◽  
Da Yi Zhang
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Cantilever Beam ◽  
Active Vibration Control ◽  
Vibrational Modes ◽  
Vibrational Response ◽  
Double Decker ◽  
Active Vibration ◽  
Sma Actuator ◽  
Simulation Results

The feasibility of using shape memory alloy (SMA) as actuators to control the vibration of a double-decker cantilever beam is demonstrated in the paper. A new and reliable form of SMA actuator is proposed in this study that no debonding and softening occurs even the maximum shear is generated by recovery force of the SMA wires. The magnitude and stability of the recovery force are tested when the SMA wires with the prestrain are heated cyclically. According to the simulation results, the four vibrational modes (three bending and one torsional) of cantilever beam can be changed simultaneously. Finally the vibrational response excited by pulsing and sinusoidal signal is successfully suppressed by using the SMA actuators in the experiments.

The Development of Wrist Rehabilitation Assistive Devices Using a Shape Memory Alloy

2013 ◽  
Vol 740 ◽  
pp. 408-415 ◽  
Author(s):  
Min Chie Chiu ◽  
Long Jyi Yeh ◽  
Tz Chi Hung
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Work ◽  
Driving Force ◽  
Electrical Circuit ◽  
Assistive Devices ◽  
New Type ◽  
Bending Mechanism ◽  
Rehabilitation Devices ◽  
Wrist Splint

For the purpose of wrist rehabilitation, a new type of SMA (Shape memory alloy) wrist rehabilitation device is developed. The palm will be actuated/lifted by the SMA’s driving force when the shape memory alloy is heated up. Four wires of the shape memory alloy (SMA-Ti50Ni45Cu5 with 1.0mm in ψ) are bundled and passed through a fixed plastic block. The whole set of the SMA wrist rehabilitation devices can give support to the palm’s bending mechanism. A 500(g) adult palm is presented in the experimental work. In order to actuate/lift the palm at a sufficient rehabilitation angle, an electrical circuit of 10(A) is adopted. Consequently, the issue, here, is to present a new type of SMA wrist splint that is used to provide a specified rehabilitation angle for the wrist.

Processing of Single-Stage Bellows of TiNi Shape Memory Alloy Using Rubber Bulge Method

2005 ◽  
Vol 475-479 ◽  
pp. 2059-2062 ◽  
Author(s):  
Hiromasa Semba ◽  
Nagatoshi Okabe ◽  
Toru Yamaji ◽  
Keisuke Okita ◽  
Kiyoshi Yamauchi
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Cold Working ◽  
Large Strain ◽  
Longitudinal Direction ◽  
Single Stage ◽  
Damping Characteristics ◽  
Annealing Conditions ◽  
New Type ◽  
Typical Shape

The bellows formed of TiNi shape memory alloy is proposed as a new type of seismic protection device. The bellows structure is known to have lower rigidity along the longitudinal direction through effect of its shape. On the other hand, TiNi is known to be one of the most typical shape memory alloys, which have high damping characteristics for dynamics engaged in its twin formation under martensite state and have the ability to recover completely from the large strain (even such as 8%) after unloaded and or heated. This paper describes a processing method of a single-stage bellows of TiNi shape memory alloy using rubber bulge method. Thin-walled TiNi tubes subjected to cold working were prepared. Several annealing conditions for the process were examined and the appropriate one was discussed. Then the rubber bulge method of displacement control was introduced. Finally, the procedure of the process including heat treatment was clarified.

Design Analysis of Two Ways Shape Memory Alloy (SMA) Actuated Aerofoil

2014 ◽  
Vol 564 ◽  
pp. 340-345
Author(s):  
Mohd Roshdi Hassan ◽  
Yong Thian Haw ◽  
Mohd Nasrisyam Asri
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Initial Position ◽  
Design Analysis ◽  
Analysis Software ◽  
Trailing Edge ◽  
Element Analysis ◽  
Rubber Material ◽  
Length Width ◽  
Simulation Results

This paper describes the design analysis of the behavior of a shape memory alloy (SMA) plate embedded into an aerofoil. Experimentation and simulation were done to fulfill this purpose. The aerofoil is made of silicone rubber material. The SMA plate which was embedded into the maximum chamber of aerofoil during the fabrication process was measured at approximately 175mm, 63mm and 3mm in length, width and thickness respectively. Experimentation was conducted to show that the SMA plate is able to produce two-way shape memory effect. Simulation was executed by using Abaqus 6.9-1 (finite element analysis software). The aerofoil profile was changed by the movement of SMA plate, which has subsequently changed the angle of aerofoil’s trailing edge. The result from the experiment shows that the aerofoil’s trailing edge has undergone a certain amount of displacement after heated. Upon cooling, the aerofoil’s trailing edge did not return to its initial position. Based on this analysis, it is clear that the simulation results are in agreement with the findings of experimental results.

Developing an adaptable pipe inspection robot using shape memory alloy actuators

2020 ◽  
Vol 31 (4) ◽  
pp. 632-647 ◽  
Author(s):  
Alireza Hadi ◽  
Azadeh Hassani ◽  
Khalil Alipour ◽  
Reza Askari Moghadam ◽  
Pouya Pourakbarian Niaz
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Laboratory Experiments ◽  
Pipe Inspection ◽  
Inspection Robot ◽  
Modeling Simulation ◽  
Simulation Results ◽  
Simulation And Control ◽  
And Control ◽  
Miniature Robot

To detect and repair the faults existing in pipes and narrow ducts in the industry, access to the inside of these pipes is often required. In this article, the conceptual design for a miniature robot for inspecting the inner walls of pipes is presented, such that the proposed robot can operate adaptably and freely in vertical, inclined, and bent paths. The robot utilizes a simple mechanism based on shape memory alloy actuators for adjusting the contact force between the robot and the inner wall of the pipe. Use of shape memory alloys as actuators for the adaptive part will result in a smaller and lighter robot, further increasing its mobility in narrower ducts. Modeling, simulation, and control of the proposed system is conducted and simulation results are validated by performing practical laboratory experiments on a built prototype.

Development of a Shape Memory Alloy Actuated Catheter for Cardiovascular Procedures

2008 ◽  
Author(s):  
Arun S. Veeramani ◽  
John H. Crews ◽  
Gregory D. Buckner ◽  
Stephen B. Owen ◽  
Richard C. Cook ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Pid Control ◽  
Experimental Validation ◽  
Imaging System ◽  
System A ◽  
Atrial Ablation ◽  
Simulation Results ◽  
Hysteretic Characteristics ◽  
Memory Characteristics

This research highlights the design, fabrication and experimental validation of a Shape Memory Alloy (SMA) actuated robotic catheter. The prototype consists of four SMA tendons that actuate a central tubular substructure in two orthogonal directions. The experimental shape memory characteristics are used to optimize the design. Joule heating is used to generate tip deflections and the experimental bending characteristics are obtained using a dual camera imaging system. These measurements reveal important nonlinearities and hysteretic characteristics of the system. A dynamic model of the system is developed to describe the SMA-effected bending mechanics, and simulation results are compared to experimental measurements for model validation. The applicability of this technology to cardiovascular procedures, like atrial ablation, is demonstrated through precise tracking of trajectories using PID control.

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