The shape memory alloy (SMA) based actuators are replacing huge and bulky because of its ability to provide high work per unit mass serves as active prismatic joint develop precise robotic manipulators. It also helps in developing a light weight manipulators with simple actuation process. Here, the study presents relationship between contraction Nitinol SMA prings input variables such current t...

A structure based on a smart material and a PID control loop is presented in this paper. A glass fiber reinforced plastic material is instrumented with Fiber Bragg Gratings (FBG) and Shape Memory Alloy (SMA) actuators. The smart material and the smart structure are both successfully checked by being subjected to different operational conditions at the laboratory. Very good responses are obtaine...

" Thermomechanical behavior at the nanoscale and size effects in shape memory alloys. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Shape memory alloys (SMA) und...

A novel Shape Memory Alloy (SMA) actuator consisting of several thin NiTi bers woven in a counter rotating helical pattern around supporting disks is rst described. This structure accomplishes a highly eecient transformation between force and displacement overcoming the main mechanical drawback of shape memory alloys, that being limited strain. Time domain open loop experiments were then conduc...

Abstract Soft composite actuators can be fabricated by embedding shape memory alloy (SMA) wires into soft polymer matrices. Shape retention and recovery of these are typically achieved incorporating segments the actuator structure. However, this requires complex manufacturing processes. This work uses multimaterial 3D printing to fabricate with variable stiffness capable recovery. The hinges be...

We are developing a biomimetic robot based on the Sea Lamprey. The robot consists of a cylindrical electronics bay propelled by an undulatory body axis. Shape memory alloy (SMA) actuators generate propagating flexion waves in five undulatory segments of a polyurethane strip. The behavior of the robot is controlled by an electronic nervous system (ENS) composed of networks of discrete-time map-b...