As a heat-triggered smart material, shape memory alloy (SMA) has been widely used in soft actuators and bioinspired robots. Coupled SMA wires are commonly chosen to achieve reversible actuation, while segment assembling methods the main solutions for complicated bending modes. To address this, dual-stimulus responsive SMA/PDMS were proposed this research. exerted by electrical current, showed p...

Shape Memory Alloy (SMA) based actuators have become ideal candidates for use in compact and lightweight applications. These smart materials often been referred to as artificial muscles due their high work volume density. In this paper, a flexure-based SMA powered mechanical oscillator is developed create an inchworm robot. Here, novel magnetic latch system used mechanically-intelligent that al...

Shape memory alloys (SMAs) are a group of metallic capable sustaining large inelastic strains that can be recovered when subjected to specific process between two distinct phases. Regarding their unique and outstanding properties, SMAs have drawn considerable attention in various domains recently became appropriate candidates for origami robots, require bi-directional rotational motion actuatio...

This article presents the formulation and application of a reduced-order thermomechanical finite strain shape memory alloy (SMA)-based microactuator model for switching devices under thermal loading by Joule heating. The is cast in generalized standard material framework with an extension thermomechanics. proper orthogonal decomposition (POD) utilized capturing reduced basis from precomputed el...

The present paper describes the design of a hybrid actuation control concept, a fuzzy logic proportional-integral-derivative plus a conventional on-off controller, for a new morphing mechanism using smart materials as actuators, which were made from shape memory alloys (SMA). The research work described here was developed for the open loop phase of a morphing wing system, whose primary goal was...

One important challenge of microsystems design is the implementation of miniaturized actuation principles efficient at the micro-scale. Shape Memory Alloys have early on been considered as a potential solution to this problem as these materials offer attractive properties like a high-power to weight ratio, large deformation and the capability to be processed at the microscale. This paper review...

In this paper, a novel variable stiffness mechanism (VSM) based on specially designed S-springs made from shape memory alloy (SMA) is developed. Based the model, by changing state combination of SMA with different thicknesses, actuator's can be discretely adjusted online. The adjustment range actuator conveniently extended almost 0 N/m to infinity preset spring angle manually offline without co...

In this paper, we propose an original formalism inspired by Markov Decision Process in order to represent homogeneously actions and direct interactions between agents. Thanks to the introduction of individual rewards characterising the problem to be solved, this formalism is a first step towards the automatic computation of policies and use of available interactions. A simple problem of distrib...

In recent years, there has been an increase in the development of medical robots to enhance interventional MRI-guided therapies and operations. Magnetic resonance imaging (MRI) surgical are particularly attractive due their ability provide excellent soft-tissue contrast during these procedures. This paper describes a novel design for tendon-driven gripper that utilizes four shape memory alloy (...