Development and Validation of a Dynamic Model of Magneto-Active Elastomer Actuation of the Origami Waterbomb Base

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Landen Bowen ◽  
Kara Springsteen ◽  
Hannah Feldstein ◽  
Mary Frecker ◽  
Timothy W. Simpson ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Software Package ◽  
Experimental Validation ◽  
Active Material ◽  
Active Materials ◽  
Stiffness And Damping ◽  
Development And Validation ◽  
Torsion Springs ◽  
Elastomer Actuation ◽  
Origami Engineering

Of special interest in the growing field of origami engineering is self-folding, wherein a material is able to fold itself in response to an applied field. In order to simulate the effect of active materials on an origami-inspired design, a dynamic model is needed. Ideally, the model would be an aid in determining how much active material is needed and where it should be placed to actuate the model to the desired position(s). A dynamic model of the origami waterbomb base, a well-known and foundational origami mechanism, is developed using adams 2014, a commercial multibody dynamics software package. Creases are approximated as torsion springs with both stiffness and damping. The stiffness of an origami crease is calculated, and the dynamic model is verified using the waterbomb. An approximation of the torque produced by magneto-active elastomers (MAEs) is calculated and is used to simulate MAE-actuated self-folding of the waterbomb. Experimental validation of the self-folding waterbomb model is performed, verifying that the dynamic model is capable of accurate simulation of the fold angles.

A Dynamic Model of Magneto-Active Elastomer Actuation of the Waterbomb Base

2014 ◽  
Author(s):  
Landen Bowen ◽  
Mary Frecker ◽  
Timothy W. Simpson ◽  
Paris von Lockette
Keyword(s):  
Dynamic Model ◽  
Special Interest ◽  
Software Package ◽  
Applied Field ◽  
Active Material ◽  
Active Materials ◽  
Stiffness And Damping ◽  
Torsion Springs ◽  
Elastomer Actuation ◽  
Origami Engineering

Of special interest in the growing field of origami engineering is self-folding, wherein a material is able to fold itself in response to an applied field. In order to simulate the effect of active materials on an origami-inspired design, a dynamic model is needed. Ideally, the model would be an aid in determining how much active material is needed and where it should be placed to actuate the model to the desired position. A dynamic model of the origami waterbomb base, a well-known and foundational origami structure, is developed using Adams, a commercial dynamics software package. Creases are approximated as torsion springs with stiffness and damping. The stiffness of an origami crease is calculated, and the dynamic model is verified using the bistability of the waterbomb. An approximation of the torque produced by magneto-active elastomers (MAE) is calculated and is used to simulate MAE-actuated self-folding of the waterbomb.

scholarly journals Bacterial Spore-Based Hygromorphs: A Novel Active Material with Potential for Architectural Applications

2021 ◽  
Vol 13 (7) ◽  
pp. 4030
Author(s):  
Emily Birch ◽  
Ben Bridgens ◽  
Meng Zhang ◽  
Martyn Dade-Robertson
Keyword(s):  
Bacillus Subtilis ◽  
Architectural Design ◽  
Energy Input ◽  
Shape Change ◽  
Active Material ◽  
Meaningful Work ◽  
Sensors And Actuators ◽  
Active Materials ◽  
Environmental Humidity ◽  
New Material

This paper introduces a new active material which responds to changes in environmental humidity. There has been growing interest in active materials which are able to respond to their environment, creating dynamic architectural systems without the need for energy input or complex systems of sensors and actuators. A subset of these materials are hygromorphs, which respond to changes in relative humidity (RH) and wetting through shape change. Here, we introduce a novel hygromorphic material in the context of architectural design, composed of multiple monolayers of microbial spores of Bacillus subtilis and latex sheets. Methods of fabrication and testing for this new material are described, showing that small actuators made from this material demonstrate rapid, reversible and repeatable deflection in response to changes in RH. It is demonstrated that the hygromorphic actuators are able to lift at least 150% of their own mass. Investigations are also extended to understanding this new biomaterial in terms of meaningful work.

scholarly journals MODELLING OF ELECTROMECHANICAL DRIVE SYSTEMS WITH THE USE OF MODAL CONDENSATION

Transport ◽  
2005 ◽  
Vol 20 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Damian Gasiorek ◽  
Arkadiusz Mežyk ◽  
Eugeniusz Switoński
Keyword(s):  
Dynamic Model ◽  
Software Package ◽  
Electromechanical Model ◽  
Electromechanical Drive ◽  
Mechanical Subsystem ◽  
Drive Systems ◽  
Dynamic Phenomena

This paper presents a method of developing a dynamic model enabling the study of the effect of the flexibility of the housing on dynamic phenomena in electromechanical drive systems. The research was performed on the basis of an electromechanical model with feedback between the mechanical subsystem (toothed gear with housing) and the electrical subsystem using a software package developed by the author in MATLAB environment.

scholarly journals Gıda Bileşenlerinin Enkapsülasyonunda Nanoemülsiyonların Kullanımı

2020 ◽  
Vol 8 (1) ◽  
pp. 130
Author(s):  
İsmail Tontul
Keyword(s):  
Controlled Release ◽  
New Products ◽  
Active Material ◽  
Core Material ◽  
Loading Capacity ◽  
Food Technology ◽  
Active Materials ◽  
Immiscible Liquids ◽  
The Core ◽  
Food Components

The increase in consumers' demands for safer and healthier food has led to the development of many new products in food technology. For this reason, micro- or nanoencapsulation has become an important area in order to protect food components with functional properties against environmental conditions and to provide controlled release in recent years. As a matter of fact, many encapsulation techniques have been developed and many different active materials have been encapsulated. Nanoemulsions, a nanoencapsulation technique, are the process of encapsulating core material in two immiscible liquids. Nanoemulsions have higher stability and loading capacity compared to normal emulsions. It also increases the bioavailability of the core materials because of the increased absorption of the active material in the digestive tract. In this review, the required materials for nanoemulsion preparation, the nanoemulsification methods, and the studies on the encapsulation of various food components in nanoemulsions have been reviewed.

scholarly journals Development and validation of a nonlinear dynamic model for tuned liquid multiple columns dampers

2020 ◽  
Vol 487 ◽  
pp. 115624
Author(s):  
Liang Cao ◽  
Yongqiang Gong ◽  
Filippo Ubertini ◽  
Hao Wu ◽  
An Chen ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Model ◽  
Development And Validation

scholarly journals Bioenergetic-active materials enhance tissue regeneration by modulating cellular metabolic state

2020 ◽  
Vol 6 (13) ◽  
pp. eaay7608 ◽  
Author(s):  
Haoming Liu ◽  
Yingying Du ◽  
Jean-Philippe St-Pierre ◽  
Mads S. Bergholt ◽  
Hélène Autefage ◽  
...  
Keyword(s):  
Tissue Regeneration ◽  
Weight Bearing ◽  
Critical Role ◽  
Active Material ◽  
Rabbit Model ◽  
Poly Lactic Acid ◽  
Metabolic State ◽  
Calcium Phosphate Ceramic ◽  
Active Materials ◽  
Cellular Bioenergetics

Cellular bioenergetics (CBE) plays a critical role in tissue regeneration. Physiologically, an enhanced metabolic state facilitates anabolic biosynthesis and mitosis to accelerate regeneration. However, the development of approaches to reprogram CBE, toward the treatment of substantial tissue injuries, has been limited thus far. Here, we show that induced repair in a rabbit model of weight-bearing bone defects is greatly enhanced using a bioenergetic-active material (BAM) scaffold compared to commercialized poly(lactic acid) and calcium phosphate ceramic scaffolds. This material was composed of energy-active units that can be released in a sustained degradation-mediated fashion once implanted. By establishing an intramitochondrial metabolic bypass, the internalized energy-active units significantly elevate mitochondrial membrane potential (ΔΨm) to supply increased bioenergetic levels and accelerate bone formation. The ready-to-use material developed here represents a highly efficient and easy-to-implement therapeutic approach toward tissue regeneration, with promise for bench-to-bedside translation.

scholarly journals Development and Validation of a Calibration Gauge for Length Measurement Systems

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3960 ◽  
Author(s):  
Francisco Javier Brosed ◽  
Raquel Acero Cacho ◽  
Sergio Aguado ◽  
Marta Herrer ◽  
Juan José Aguilar ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Machine Tools ◽  
Experimental Validation ◽  
Element Analysis ◽  
Measurement Systems ◽  
Guidance Systems ◽  
Verification Systems ◽  
Development And Validation

Due to accuracy requirements, robots and machine-tools need to be periodically verified and calibrated through associated verification systems that sometimes use extensible guidance systems. This work presents the development of a reference artefact to evaluate the performance characteristics of different extensible precision guidance systems applicable to robot and machine tool verification. To this end, we present the design, modeling, manufacture and experimental validation of a reference artefact to evaluate the behavior of these extensible guidance systems. The system should be compatible with customized designed guides, as well as with commercial and existing telescopic guidance systems. Different design proposals are evaluated with finite element analysis, and two final prototypes are experimentally tested assuring that the design performs the expected function. An estimation of the uncertainty of the reference artefact is evaluated with a Monte Carlo simulation.

Development and Validation of the Kinematic Analysis of a Low Low-Cost 4-Link Robot

2015 ◽  
Vol 789-790 ◽  
pp. 626-635
Author(s):  
O. Olatunbosun Ajayi ◽  
E. Okafor Onyemaechi ◽  
Onwudiwe Obumneme
Keyword(s):  
Kinematic Analysis ◽  
Robot Control ◽  
Third World ◽  
Experimental Validation ◽  
System Development ◽  
Low Cost ◽  
Experimental Results ◽  
Computer Interface ◽  
Robot System ◽  
Development And Validation

In this paper, we describe the development and validation of the kinematic analysis of a low low-cost 4-link robot the first of its kind in Nigeria. This study comprises the following key tasks which describe the methodology for the robot development: design and kinematic analysis of the robot mechanism, construction/fabrication and assembly of the robot, system development (computer interface with the robot) and experimental validation of the robot control. The goal of this robot is to pick an object and drop the object in a specified position. The algorithm to control the robot on the computer was coded in Java and simulated in MATLAB/Simulink platform. The robot was experimentally verified and the results are presented in this paper. The experimental results show that robot development is feasible in Nigeria. The contribution of this study will enhance and promote robot control and development in Nigeria and developing third world countries.

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