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Keywords: actuators
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Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2011, 133(11): 111010.
Published Online: November 17, 2011
...WonHee Kim; Brian M. Barnes; Jonathan E. Luntz; Diann E. Brei The high energy density actuation potential of shape memory alloy (SMA) wire is tempered by conservative design guidelines set to mitigate complex factors such as functional fatigue (shakedown). In addition to stroke loss, shakedown...
Journal Articles
Article Type: Research Papers
J. Mech. Des. October 2011, 133(10): 101011.
Published Online: October 25, 2011
... using a simplified aircraft control actuator design problem resulting in a highly resilient actuator with optimized reliability, PHM efficiency and redundancy for the given parameter settings. 15 01 2011 21 08 2011 22 08 2011 25 10 2011 25 10 2011 actuators aircraft...
Journal Articles
Article Type: Research Papers
J. Mech. Des. June 2011, 133(6): 061008.
Published Online: June 16, 2011
...Andrea Spaggiari; Eugenio Dragoni This paper explores the merits of shape memory wave springs as powering elements of solid-state actuators. Advantages and disadvantages of the wave construction in comparison to the traditional helical shape are presented and discussed by means of dimensionless...
Journal Articles
Article Type: Research Papers
J. Mech. Des. May 2011, 133(5): 051008.
Published Online: June 8, 2011
...Anngwo Wang; Seth Gitnes; Lotfi El-Bayoumy The instantaneous efficiency of an epicyclic gear rotary actuator is an important factor in sizing flight control systems where compound epicyclic gear trains are typically used. The efficiency variation can be smooth or fluctuating depending...
Journal Articles
Article Type: Research Papers
J. Mech. Des. February 2010, 132(2): 021001.
Published Online: January 14, 2010
...A. Banerjee; B. Bhattacharya; A. K. Mallik For discrete actuation with shape memory alloy (SMA) wires, the actuation moment can be controlled by changing the amount of wire offset. Increasing offset not only enhances the actuating moment, but also demands larger displacement capability...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2009, 131(11): 111009.
Published Online: October 14, 2009
...Wojciech Bejgerowski; Satyandra K. Gupta; Hugh A. Bruck Thermally conductive filled polymers enable the creation of multifunctional structures that offer both anchoring points for the embedded actuators, as well as heat-dissipation functions, in order to facilitate the miniaturization of devices...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2009, 131(11): 111001.
Published Online: October 6, 2009
...Brian Trease; Sridhar Kota We present a framework for the design of a compliant system, i.e., the concurrent design of a compliant mechanism with embedded actuators and sensors. Our methods simultaneously synthesize optimal structural topology and component placement for maximum energy efficiency...
Journal Articles
Article Type: Research Papers
J. Mech. Des. October 2009, 131(10): 101001.
Published Online: September 2, 2009
... them first-class candidates not only for microswitches but also several other robotic appliances. This paper investigates the actuation of a simple bistable mechanism, the bistable buckled beam. It is pointed out that the position of the actuation has a significant impact on the behavior of the system...
Journal Articles
Article Type: Research Papers
J. Mech. Des. September 2009, 131(9): 091006.
Published Online: August 18, 2009
...Thomas Georges; Vladimir Brailovski; Emeric Morellon; Daniel Coutu; Patrick Terriault An active structure of a morphing wing designed for subsonic cruise flight conditions is composed of three principal subsystems: (1) flexible extrados, (2) rigid intrados, and (3) an actuator group located inside...
Journal Articles
Article Type: Research Papers
J. Mech. Des. August 2009, 131(8): 081002.
Published Online: July 9, 2009
... of the kinetic energy ratios of the actuators and links and are indicators of the kinetic energy distribution within the system while the rates of change in the KEPVs indicate the sensitivity to change in the location of that kinetic energy. A high value for the KEPV rate of change together with a high...
Journal Articles
Article Type: Research Papers
J. Mech. Des. February 2009, 131(2): 021010.
Published Online: January 21, 2009
...Oziel Rios; Delbert Tesar A serial robotic manipulator arm is a complex electromechanical system whose performance is characterized by its actuators. The actuator itself is a complex nonlinear system whose performance can be characterized by the speed and torque capabilities of its motor, and its...
Journal Articles
Article Type: Research Papers
J. Mech. Des. February 2009, 131(2): 021003.
Published Online: January 6, 2009
.... The deployment modeling starts with the formulation of a phenomenological model for a single deployable coiling device. A force-elongation model is built experimentally by measuring the restoring force of such a hysteretic tape-spring actuator. Then, six actuator models are used in parallel to build a complete...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2009, 131(1): 011009.
Published Online: December 15, 2008
...Bokman Lim; Frank C. Park One means of designing reduced vibration mechanisms is to ensure that the mechanism’s natural frequency be sufficiently greater than the driving frequencies of the actuators. In this paper we consider the problem of determining a mechanism’s mass, inertial, and joint...
Journal Articles
Article Type: Research Papers
J. Mech. Des. December 2008, 130(12): 122303.
Published Online: October 21, 2008
... on the actuators, which displace the platform in the horizontal plane. A prototype of the proposed manipulator with four degrees of freedom and an experimental validation of the suggested concept are also presented. Two cases have been examined on the built prototype: a manipulator with payload and one without...
Journal Articles
Article Type: Research Papers
J. Mech. Des. September 2008, 130(9): 091402.
Published Online: August 11, 2008
... environments and to handle fragile objects using whole arm manipulation. This paper develops optimal designs for OctArm manipulators, i.e., multisection, trunklike soft arms. OctArm manipulator design involves the specification of air muscle actuators and the number, length, and configuration of sections...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. August 2008, 130(8): 084502.
Published Online: July 11, 2008
...Hagay Bamberger; Alon Wolf; Moshe Shoham Manufacturing techniques, especially in the microscale, determine the type of joints, links, and actuators available for the designer, and as a result, the possible kinematic architectures of the designed mechanism. This paper discusses the design...
Journal Articles
Article Type: Research Papers
J. Mech. Des. August 2008, 130(8): 082302.
Published Online: July 10, 2008
...B. Demeulenaere; R. S. Berkof Linkage and cam-follower mechanism design are often based on the simplifying assumption of constant drive speed. Usually, however, the mutual interaction between the mechanism and its actuator gives rise to a fluctuating drive speed, possibly resulting in a variety...
Journal Articles
Article Type: Research Papers
J. Mech. Des. December 2007, 129(12): 1251–1255.
Published Online: December 14, 2006
...Sunil K. Agrawal, Ph.D.; Ji-Chul Ryu This paper presents a methodology for design of dissipative assist robots with proven stability during set-point control. A dissipative assist robot is defined as one where the actuators continuously dissipate energy from the robot until the robot reaches...
Journal Articles
Article Type: Research Papers
J. Mech. Des. April 2007, 129(4): 406–412.
Published Online: April 6, 2006
... mechanisms capable of generating a wide variety of specifiable, nonlinear elastic relationships. One of these designs is physically implemented as a quadratic “spring” and is used to create a passively compliant robot joint with series-elastic actuation. A simple feed-forward algorithm is then experimentally...
Journal Articles
Article Type: Research Papers
J. Mech. Des. March 2007, 129(3): 346–360.
Published Online: February 27, 2006
...Ryan T. Ratliff; Prabhakar R. Pagilla A voice-coil motor actuator system is designed to perform a unique disk drive ramp load/unload operation. The design eliminates the necessity of increased material requirements common in ramp load disk drives. Therefore, disk drives with lower cost, higher...