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Improvement of the response of SMA actuator using temperature sensor
温度センサを用いたSMAアクチュエータの応答速度の改善法
1989
Journal of the Robotics Society of Japan
温度センサを用いたSMAアクチュエータの応答速度の改善法
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) actuator using temperature sensors
Fig. 13 Responses of the angular displacement control for rectangular wave input (The room temperature is 22•Ž) (a) by the ordinary control method with ventilation ...
gain (4095/10 V))
Fig. 5 5 Fig. 5 SCR driver circuit for SMA actuator
Fig. 6 Input and output properties of the SCR driver for SMA actuator (uB is generated by DA converter with the gain (10 V/4095 ...
.: A New Actuator of a Joint Mechanism Using TiNi Alloy Wire, International Journal of Robotics Research, Vol.4, No.4, p.47-58 (1986) ...
doi:10.7210/jrsj.7.39
fatcat:6qak5qkekrfxle4xu7l66iyv74
Improving the response of SMA actuators
Proceedings of 1995 IEEE International Conference on Robotics and Automation
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This paper describes two novel developments of the basic SMA actuator which improve dynamic performance. ...
Unfortunately their response is relatively slow, being limited by the speed with which the SMA can be heated and cooled. ...
Acknowledgments The authors would like to gratefully acknowledge the generous financial support of David Wang, member of the ConStruct group at the University of Waterloo. ...
doi:10.1109/robot.1995.525604
dblp:conf/icra/RussellG95
fatcat:vhpqb2fmqbcn5dqzha3mascosa
USE OF SHAPE MEMORY ALLOY FOR A PILOT STAGE ACTUATOR OF A WATER HYDRAULIC CONTROL VALVE
2002
Proceedings of the JFPS International symposium on fluid power
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memory, Pilot stage actuator ...
These alloys can be plastically deformed with moderate forces at low temperature, and upon exposure to some higher temperature the alloys will return to its original shape prior to the KEY WORDS Shape ...
IMPROVING THE RESPONSE OF SMA ACTUATORS Traditionally shape memory actuators have relationally slow response. Reason for slow response is not the transformation rate. ...
doi:10.5739/isfp.2002.149
fatcat:xun2jellgvdsjf7vu3p2bjjt6y
Efficiency Analysis of SMA-Based Actuators: Possibilities of Configuration according to' the Application
2021
Actuators
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The multi-wires actuator configuration produce a better response in terms of position but are less energy efficient. ...
In this work, we developed different configurations of SMA actuators and tested their performance in terms of efficiency and the position error in the cooling stage. ...
The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. ...
doi:10.3390/act10030063
fatcat:3bqwu2yyu5cyjldgx3amrq33ku
An Architecture for Fast and Accurate Control of Shape Memory Alloy Actuators
2008
The international journal of robotics research
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The closed-loop response is fast and accurate, even in the presence of large external motion disturbances. There is no sign of limit cycles; and the performance is unaffected by large load inertias. ...
of the position encoder. 0 The final, definitive version of this paper has been ...
Future research directions include implementing better control designs to further improve the speed of response of the SMA actuator. ...
doi:10.1177/0278364908090951
fatcat:hsprgeinvregdlfxg6qfpsxtie
Analysis and Evaluation of the Dynamic Performance of SMA Actuators for Prosthetic Hand Design
2009
Journal of materials engineering and performance (Print)
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and evaluation of the dynamic performance of SMA actuators for prosthetic hand design. ...
Joule-heating of the SMA bundle actuators generates sufficient torque at the fingers to allow a wide range of everyday tasks to be carried out. ...
Forced cooling via metallic heat sinks of SMAs has been shown to significantly improve the transient response during the cooling (expansion) stage. ...
doi:10.1007/s11665-009-9431-9
fatcat:alhiqfok3ffojbls4qhpdlldva
Shape Memory Alloy-based High Phase Order Motor
2014
Proceedings of the 11th International Conference on Informatics in Control, Automation and Robotics
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The motor can be used either in stepping mode or in servo mode of operation. Each phase of the motor consists of an SMA wire with a spring. The principle of operation of the HPOM is presented. ...
depending on which SMA is actuated, which are presented in this work. ...
The complete setup is depicted in figure 11 . When the frequency increase the tracking error also increases but increasing the ISMA the speed response improves. ...
doi:10.5220/0005114805620568
dblp:conf/icinco/RossiYZBC14
fatcat:72nd436fpzfb7egnixhcbvrq34
Development of Faster SMA Actuators
[chapter]
2017
Shape Memory Alloys - Fundamentals and Applications
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Development of Faster SMA Actuators http://dx.doi.org/10.5772/intechopen.69868 Development of Faster SMA Actuators ...
However, the grease-cooled actuators had shown less strain, and their response was non-linear at many instances. ...
Figure 10 shows the response of oil-cooled SMA actuator when actuated for 2 seconds at different actuation currents. ...
doi:10.5772/intechopen.69868
fatcat:gmumzawukzfcfnpqe3xkudyura
Flexible shape memory alloy actuators for soft robotics: Modelling and control
2020
International Journal of Advanced Robotic Systems
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Some exoskeleton prototypes have been developed, which demonstrate the utility of this actuator and the advantages offered by these flexible actuators to improve the comfort and adaptability of exoskeletons ...
One of the limitations in the development of really soft robotic devices is the development of soft actuators. ...
Acknowledgement The authors would like to express their special thanks to Alvaro Villoslada for the development of the BPID controller included in this article. ...
doi:10.1177/1729881419886747
fatcat:dl7tx6apujhv7kuhpq7tvvqpmy
Development of Miniature Stewart Platform Using TiNiCu Shape-Memory-Alloy Actuators
2015
Advances in Materials Science and Engineering
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Each SMA actuator exerts a maximum force of 0.6 N at PWM duty cycle of 100%. ...
The tilting direction depends on the SMA actuator that is activated, while all four SMA actuators are activated to achieve the linearz-axis movement. ...
The measurement process of thermal response of SMA actuator is shown in Figure 11 . For this experiment, only one SMA actuator is actuated and the change of temperature was recorded every second. ...
doi:10.1155/2015/928139
fatcat:tc4ekx2hirhz5d3j3v4dfadgiq
SMA-Based Muscle-Like Actuation in Biologically Inspired Robots: A State of the Art Review
[chapter]
2012
Smart Actuation and Sensing Systems - Recent Advances and Future Challenges
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Improving the performance of SMA actuators One of the main limitations in SMA actuation speed is due to high latency that the the cooling time of the wire implies. ...
improving actuation speed. ...
doi:10.5772/50209
fatcat:sruixz6vuzbgrdvaa56mte2lzm
Design and control of a proof-of-concept active jet engine intake using shape memory alloy actuators
2011
Smart Structures and Systems
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Acknowledgments The first author would like to thank the support provided by NASA through a grant (NAG3-2827) and NSF through a CAREER grant (0093737). ...
of an adaptive intake to improve the fuel efficiency of a jet engine. ...
Since the heat dissipation in this experiment occurred mainly through natural convection, the response of the device during the cooling period can be improved by using forced convection. ...
doi:10.12989/sss.2011.7.1.001
fatcat:oybfynumjbgbpij62s5hjmcrvm
A Review of SMA-Based Actuators for Bidirectional Rotational Motion: Application to Origami Robots
2021
Frontiers in Robotics and AI
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However, longitudinal motion-driven actuators are frequently investigated and commonly mentioned, whereas studies in SMA-based rotational motion actuation is still very limited in the literature. ...
This work provides a review of different research efforts related to SMA-based actuators for bi-directional rotational motion (BRM), thus provides a survey and classification of current approaches and ...
An SMA blade-form actuator realized by a thermoelectric system composed of two bismuth tellurides (Bi 2 Te 3 ) ingots is tested, resulting in an improvement of response dynamic during cooling. ...
doi:10.3389/frobt.2021.678486
fatcat:wtbcoxnlcbd3jjupyvqljl43b4
Wind Tunnel Test of Morphing Flap Driven by Shape Memory Alloy Wires
2017
TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES AEROSPACE TECHNOLOGY JAPAN
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The actuator system is comprised of thin SMA wires and air blowers to improve the response of the SMA wires. ...
In addition, solid actuators such as electromagnetic motors and shape memory alloys (SMAs) reduce weight and maintenance cost compared to conventional hydraulic actuators. ...
The authors would like to thank the members of JAXA's 2m × 2m Low-speed Wind Tunnel and Optical-Measurement teams for the support provided. ...
doi:10.2322/tastj.15.a75
fatcat:33wb5irzorcx7ln7fg2t7rvvxu
A concise review of the applications of NiTi shape-memory alloys in composite materials
2014
South African Journal of Science
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The understanding of the characteristics of NiTi SMAs such as SME and pseudoelasticity, is important in the design and implementation of NiTi-based devices. ...
SME is based on the reversible martensitic transformation of the SMA between an austenitic phase and a martensitic phase by the application of heat or stress. 8 The forward thermoelastic transformation ...
Acknowledgement This work was supported by the Faculty of Engineering, Cape Peninsula University of Technology, Bellville campus, Cape Town, South Africa. ...
doi:10.1590/sajs.2014/20130200
fatcat:op3ppg2z4ndebdxhw6dlxhjewm
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