منابع مشابه
Nonlinear Stress-based Control of a Rotary SMA-actuated Manipulator
In this paper a nonlinear stress-based controller is designed to position a singledegree-of-freedom shape memory alloy (SMA) actuated manipulator. A three-part model was constructed based on the dynamics/kinematics of the arm, the thermomechanical behavior of SMAs, and an assumed heat transfer model consisting of electrical heating and natural convection. Both sliding mode control and inverse d...
متن کاملInvestigation of a gripping device actuated by SMA wire
A gripping device actuated by shape memory alloy (SMA) wire was fabricated and investigated. The actuation mechanism and the working rinciple of the gripping device are simple. A SMA wire was used to close the gripper during operation and a torsion spring was integrated to open he gripper when the SMA wire relaxed. Several experiments were conducted to investigate the performance of the grippin...
متن کاملOptimization of fuzzy controller for an SMA-actuated artificial finger robot
The purpose of this paper is to design and optimize an intelligent fuzzy-logic controller for a three-degree of freedom (3DOF) artificial finger with shape-memory alloy (SMA) wire actuators. The robotic finger is constructed using three SMA wires as tendons to bend each phalanx of the finger around its revolute joint and three torsion springs which return the phalanxes to their original positio...
متن کاملNonlinear Analysis of a Flexible Beam Actuated by a Couple of Active SMA Wire Actuators
There are two different ways of using SMA wires as actuators for shape control of flexible structures; which can be either embedded within the composite laminate or externally attached to the structure. Since the actuator can be placed at different offset distances from the beam, external actuators produce more bending moment and, consequently, considerable shape changes with the same magnitude...
متن کاملMechanical Behavior of an Electrostatically-Actuated Microbeam under Mechanical Shock
In this paper static and dynamic responses of a fixed-fixed microbeam to electrostatic force and mechanical shock for different cases have been studied. The governing equations whose solution holds the answer to all our questions about the mechanical behavior is the nonlinear elasto-electrostatic equations. Due to the nonlinearity and complexity of the derived equations analytical solution are ...
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ژورنال
عنوان ژورنال: Journal of Medical Devices
سال: 2008
ISSN: 1932-6181,1932-619X
DOI: 10.1115/1.2936116