...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...

... 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 References 1 Du...

...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...

...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...

...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...

...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...

...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...

... 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...

...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...

... 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...

...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...

.... 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...

...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...

... 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...

... 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...

...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...

...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...

...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...

... 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...

...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...