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Design Innovation Paper

Design and Characterization of a Continuous Rotary Minimotor Based on Shape-Memory Wires and Overrunning Clutches1

[+] Author and Article Information
Giovanni Scirè Mammano

Department of Engineering Sciences and Methods,
University of Modena and Reggio Emilia,
Reggio Emilia I-42122, Italy

Eugenio Dragoni

Department of Engineering Sciences and Methods,
University of Modena and Reggio Emilia,
Reggio Emilia I-42122, Italy
e-mail: eugenio.dragoni@unimore.it

2Corresponding author.

Contributed by the Design Innovation and Devices of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received March 26, 2016; final manuscript received July 28, 2016; published online October 6, 2016. Assoc. Editor: Massimo Callegari.

J. Mech. Des 139(1), 015001 (Oct 06, 2016) (9 pages) Paper No: MD-16-1243; doi: 10.1115/1.4034401 History: Received March 26, 2016; Revised July 28, 2016

An attractive but little explored field of application of the shape-memory technology is the area of rotary actuators, in particular for generating endless motion. This paper presents a miniature rotary motor based on shape-memory alloy (SMA) wires and overrunning clutches, which produces high output torque and unlimited rotation. The concept features an SMA wire tightly wound around a low-friction cylindrical drum to convert wire strains into large rotations within a compact package. The seesaw motion of the drum ensuing from repeated contraction–elongation cycles of the wire is converted into unidirectional motion of the output shaft by an overrunning clutch fitted between drum and shaft. Following a design process developed in a former paper, a six-stage prototype with size envelope of 48 × 22 × 30 mm is built and tested. Diverse supply strategies are implemented to optimize either the output torque or the speed regularity of the motor with the following results: maximum torque = 20 Nmm; specific torque = 6.31 × 10−4 Nmm/mm3; rotation per module = 15 deg/cycle; and free continuous speed = 4.4 rpm.

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References

Jani, J. M. , Leary, M. , Subic, A. , and Gibson, M. A. , 2014, “ A Review of Shape Memory Alloy Research, Applications and Opportunities,” Mater. Des., 56(4), pp. 1078–1113. [CrossRef]
Jacot, A. D. , Julien, G. J. , and Clingman, D. J. , 2000, “ Shape Memory Rotary Actuator,” U.S. Patent No. US6065934 A.
Keefe, A. C. , and Carman, G. P. , 2000, “ Thermomechanical Characterization of Shape Memory Alloy Torque Tube Actuators,” Smart Mater. Struct., 9(5), pp. 665–672. [CrossRef]
Mehrabi, R. , Kadkhodaei, M. , Andani, M. T. , and Elahinia, M. , 2015, “ Microplane Modeling of Shape Memory Alloy Tubes Under Tension, Torsion, and Proportional Tension–Torsion Loading,” J. Intell. Mater. Syst. Struct., 26(2), pp. 144–155. [CrossRef]
Park, B. H. , Shantz, M. , and Prinz, F. , 2001, “ Scalable Rotary Actuators With Embedded Shape Memory Alloy,” Proc. SPIE, 4327, pp. 78–87.
Jansen, S. , Breidert, J. , and Welp, E. G. , 2004, “ Positioning Actuator Based on Shape Memory Wires,” ACTUATOR 2004, 9th International Conference on New Actuators, pp. 94–97.
Miga Motor Company, 2015, “ NanoMuscle NM70R-6P—Rotary Memory Metal Actuator,” Miga Motor, Silverton, OR, accessed Jan. 19, 2015, http://www.migamotors.com/index.php?main_page=product_info&cPath=1&products_ id=29
Toki Corporation, 2015, “ Biometal SmartServo RC-1,” Toki, Yokohama, Japan, accessed Jan. 19, 2015, http://www.toki.co.jp/biometal
Spinella, I. , Scirè Mammano, G. , and Dragoni, E. , 2009, “ Conceptual Design and Simulation of a Compact Shape Memory Actuator for Rotary Motion,” J. Mater. Eng. Perform., 18(5–6), pp. 638–648. [CrossRef]
Lan, C.-C. , Wang, J.-H. , and Fan, C.-H. , 2009, “ Optimal Design of Rotary Manipulators Using Shape Memory Alloy Wire Actuated Flexures,” Sens. Actuators A, 153(2), pp. 258–266. [CrossRef]
Yoshida, E. , 2002, “ Continuous Rotary Actuator Using Shape Memory Alloy,” U.S. Patent No. US6484848 B2.
Pöhlau, F. , and Meier, H. , 2004, “ Extremely Compact High-Torque Drive With Shape Memory Actuators and Strain Wave Gear Wave Drive®,” ACTUATOR 2004 9th International Conference on New Actuators, pp. 98–102.
Sharma, S. V. , Nayak, M. M. , and Dinesh, N. S. , 2008, “ Modelling, Design and Characterization of Shape Memory Alloy-Based Poly-Phase Motor,” Sens. Actuators A, 147(2), pp. 583–592. [CrossRef]
Kim, W. , Utter, B. , Luntz, J. , and Brei, D. , 2013, “ Model-Based Memory Alloy Wire Ratchet Actuator Design,” ASME Paper No. SMASIS2013-3333.
Hwang, D. , Hattori, S. , and Higuchi, T. , 2013, “ A Bidirectional Rotary Actuator Using Shape Memory Alloy Wires,” International Symposium on Ultraprecision Engineering and Nanotechnology (ISUPEN 2013), Tokyo, Japan, Mar. 13.
Zhang, X. Y. , and Yan, X. J. , 2012, “ Continuous Rotary Motor Actuated by Multiple Segments of Shape Memory Alloy Wires,” J. Mater. Eng. Perform., 21(12), pp. 2643–2649. [CrossRef]
Hwang, D. , and Higuchi, T. , 2014, “ A Cycloidal Wobble Motor Driven by Shape Memory Alloy Wires,” Smart Mater. Struct., 23(5), p. 055023. [CrossRef]
Hwang, D. , and Higuchi, T. , 2014, “ A Rotary Actuator Using Shape Memory Alloy (SMA) Wires,” IEEE/ASME Trans. Mechatronics, 19(5), pp. 1625–1635. [CrossRef]
Song, G. , 2007, “ Design and Control of a NiTi Wire Actuated Rotary Servo,” Smart Mater. Struct., 16(5), pp. 1796–1801. [CrossRef]
Scirè Mammano, G. , and Dragoni, E. , 2011, “ Modeling of Wire-on-Drum Shape Memory Actuators for Linear and Rotary Motion,” J. Intell. Mater. Syst. Struct., 22(11), pp. 1129–1140. [CrossRef]
Scirè Mammano, G. , and Dragoni, E. , 2016, “ Modelling and Validation of a Rotary Motor Combining Shape Memory Wires and Overrunning Clutches,” J. Intell. Mater. Syst. Struct., 27(14), pp. 1976–1988. [CrossRef]
Scirè Mammano, G. , and Dragoni, E. , 2011, “ Increasing Stroke and Output Force of Linear Shape Memory Actuators by Elastic Compensation,” Mechatronics, 21(3), pp. 570–580. [CrossRef]
Berselli, G. , Scirè Mammano, G. , and Dragoni, E. , 2014, “ Design of a Dielectric Elastomer Cylindrical Actuator With Quasi-Constant Available Thrust: Modeling Procedure and Experimental Validation,” ASME J. Mech. Des., 136(12), p. 125001. [CrossRef]
Gowda, A. , 2007, “ Reliability Testing of Thermal Greases,” Electronics Cooling, ITEM Publications, Philadelphia, PA, accessed Aug. 13, 2016, http://www.electronics-cooling.com/2007/11/reliability-testing-of-thermal-greases/
Nespoli, A. , Besseghini, S. , Pittaccio, S. , Villa, E. , and Viscuso, S. , 2010, “ The High Potential of Shape Memory Alloys in Developing Miniature Mechanical Devices: A Review on Shape Memory Alloy Mini-Actuators,” Sens. Actuators A, 158(1), pp. 149–160. [CrossRef]
Scirè Mammano, G. , and Dragoni, E. , 2014, “ Effect of Loading and Constraining Conditions on the Thermomechanical Fatigue Life of NiTi Shape Memory Wires,” J. Mater. Eng. Perform., 23(7), pp. 2403–2411. [CrossRef]

Figures

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Fig. 1

Concept of the single-stage rotary motor

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Fig. 6

Schematics of the power converters for the SMA wires

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Fig. 7

Three-dimensional CAD model of the prototype motor mounted on the test bed (a) and experimental setup (b)

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Fig. 8

Activation sequence used for the speed testing

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Fig. 5

Prototype of the optimized motor: (a) view from the spring side and (b) view from the electronic board side

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Fig. 4

CAD model of the optimized motor

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Fig. 3

Material model of the SMA wire in austenitic and martensitic states

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Fig. 2

Example of a three-stage rotary motor

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Fig. 9

Comparison between theoretical and experimental rotary stroke of the single module for given external torques

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Fig. 10

Transient shaft rotation for a single module supplied with a current step of 800 mA under several external torques

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Fig. 11

Effect of drum diameter on the transient shaft rotation of a free single module supplied with a current step of 800 mA

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Fig. 12

Transient shaft rotation with two modules supplied simultaneously (800 mA each) under several external torques

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Fig. 13

Comparison of transient shaft rotation for single-stage and two-stage activation of the motor under external torques of 0 Nmm and 20 Nmm

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Fig. 14

Average rotational speed of the motor as a function of the applied torque for several operating modes (ψ = 0, 0.4, 0.8, and 1) and supply time tphase = 500 ms

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Fig. 15

Average rotational speed of the motor as a function of the applied torque for several operating modes (ψ = 0, 0.4, 0.8, and 1) and supply time tphase = 1000 ms

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