Experimental characterization and validation of model for cantilever beam platform using SMA actuator

2022 ◽  
Vol 20 (3) ◽  
pp. 519-525
Author(s):  
Eisenhawer De Moura Fernandes ◽  
Jose Sergio Da Rocha Neto ◽  
Antonio Julio Santana Barroso
Keyword(s):  
Cantilever Beam ◽  
Experimental Characterization ◽  
Sma Actuator

Development of an Antagonistic SMA Actuator for Instar Rifle Stabilization System

Aerospace ◽  
2005 ◽  
Author(s):  
Brian Barnes ◽  
Diann Brei ◽  
Jonathan Luntz ◽  
Chris LaVigna
Keyword(s):  
Motion Control ◽  
Pulse Width ◽  
High Stress ◽  
Experimental Characterization ◽  
Pulse Width Modulated ◽  
Actuation System ◽  
Position Feedback ◽  
Sma Actuator ◽  
Feedback Control Strategy

Shape memory alloys are notoriously slow and suffer from creep and controllability issues [1,2]. This paper presents three methods to address these issues: a high-stress cyclic conditioning regime to reduce creep to operationally insignificant levels, an unconventional pulse-width-modulated duty cycle with heatsink to increase frequency to the ten hertz range, and simple position feedback control strategy for motion control. These methods are discussed within the context of a simple antagonistic leveraged SMA actuation system developed for an INertially STAbilized Rifle (INSTAR). An overview of design and basic parameter models for the L-Lever is provided along with benchtop experimental characterization of the quasistatic and dynamic behavior. The actuator was integrated into a one degree of freedom INSTAR platform to demonstrate the insitu methods via barrel control. The methods discussed in this paper led to a fast, low-creep, controllable actuator with outstanding authority resulting in precise barrel control with capabilities to greatly increase shooter accuracy.

Experimental Characterization of a Cantilever Beam With a Fluidic Flexible Matrix Composite Vibration Treatment

2014 ◽  
Author(s):  
Bin Zhu ◽  
Matthew J. Krott ◽  
Christopher D. Rahn ◽  
Charles E. Bakis
Keyword(s):  
Cantilever Beam ◽  
Matrix Composite ◽  
Resonance Peak ◽  
Structural Vibration ◽  
Resonant Response ◽  
Experimental Characterization ◽  
Host Structure ◽  
Fluidic Circuits ◽  
Flexible Matrix Composite

Fluidic flexible matrix composite (F2MC) tubes can add damping to and absorb vibrations from a host structure. Transverse structural vibration couples with F2MC tube strain to pump fluid through an external circuit that can be tailored to provide vibration damping and/or absorption. In this paper, an F2MC-cantilever system, consisting of two F2MC tubes attached to a uniform cantilever beam, is designed, fabricated, and experimentally tested. The F2MC tubes are connected in parallel to one of two fluidic circuits. The first circuit uses an orifice to dissipate energy, reducing the first mode resonant response by over 20 dB and providing 5% damping. The second circuit uses an inertia track and an accumulator to produce a tuned absorber that replaces the first mode resonance peak with a valley, reducing the resonant response by 27 dB.

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.

Experimental Characterization of the Reliability of 3-Terminal Dual-Damascene Copper Interconnect Trees

2002 ◽  
Vol 716 ◽  
Author(s):  
C. L. Gan ◽  
C. V. Thompson ◽  
K. L. Pey ◽  
W. K. Choi ◽  
F. Wei ◽  
...  
Keyword(s):  
Stress Conditions ◽  
Experimental Characterization ◽  
Contact Lines ◽  
Tree Structures ◽  
Similar Test ◽  
Dual Damascene ◽  
Copper Interconnect ◽  
Test Conditions

AbstractElectromigration experiments have been carried out on simple Cu dual-damascene interconnect tree structures consisting of straight via-to-via (or contact-to-contact) lines with an extra via in the middle of the line. As with Al-based interconnects, the reliability of a segment in this tree strongly depends on the stress conditions of the connected segment. Beyond this, there are important differences in the results obtained under similar test conditions for Al-based and Cu-based interconnect trees. These differences are thought to be associated with variations in the architectural schemes of the two metallizations. The absence of a conducting electromigrationresistant overlayer in Cu technology, and the possibility of liner rupture at stressed vias lead to significant differences in tree reliabilities in Cu compared to Al.

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