Chemo-mechanical Model for Actuation Based on Biological Membranes*

Sundaresany, Vishnu Baba; Leo, Donald J.

doi:10.1177/1045389x06061129

Cited by 21 publications

(9 citation statements)

References 8 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although appearing as a promising candidate for morphing skins, the research in this area is not extensive. Other materials that have attracted research interest in this field include the Veriflex ® -based polymer [61], which is thermally activated, and the nastic shape changing materials [62]. The nastic materials refer to a class of substances that mimic biological systems to produce large deformations through the conversion of chemical energy available within the material.…”

Section: Morphing Skinsmentioning

confidence: 99%

Variable geometry wing-box: toward a robotic morphing wing.

Moosavian¹

2021

Preprint

View full text Add to dashboard Cite

The ability to vary the geometry of a wing to adapt to different flight conditions can significantly improve the performance of an aircraft. However, the realization of any morphing concept will typically be accompanied by major challenges. Specifically, the geometrical constraints that are imposed by the shape of the wing and the magnitude of the air and inertia loads make the usage of conventional mechanisms inefficient for morphing applications. Such restrictions have served as inspirations for the design of a modular morphing concept, referred to as the Variable Geometry Wing-box (VGW). The design for the VGW is based on a novel class of reconfigurable robots referred to as Parallel Robots with Enhanced Stiffness (PRES) which are presented in this dissertation. The underlying feature of these robots is the efficient exploitation of redundancies in parallel manipulators. There have been three categories identified in the literature to classify redundancies in parallel manipulators: 1) actuation redundancy, 2) kinematic redundancy, and 3) sensor redundancy. A fourth category is introduced here, referred to as 4) static redundancy. The latter entails several advantages traditionally associated only with actuation redundancy, most significant of which is enhanced stiffness and static characteristics, without any form of actuation redundancy. Additionally, the PRES uses the available redundancies to 1) control more Degrees of Freedom (DOFs) than there are actuators in the system, that is, under-actuate, and 2) provide multiple degrees of fault tolerance. Although the majority of the presented work has been tailored to accommodate the VGW, it can be applied to any comparable system, where enhanced stiffness or static characteristics may be desired without actuation redundancy. In addition to the kinematic and the kinetostatic analyses of the PRES, which are developed and presented in this dissertation along with several case-studies, an optimal motion control algorithm for minimum energy actuation is proposed. Furthermore, the optimal configuration design for the VGW is studied. The optimal configuration design problem is posed in two parts: 1) the optimal limb configuration, and 2) the optimal topological configuration. The former seeks the optimal design of the kinematic joints and links, while the latter seeks the minimal compliance solution to their placement within the design space. In addition to the static and kinematic criteria required for reconfigurability, practical design considerations such as fail-safe requirements and design for minimal aeroelastic impact have been included as constraints in the optimization process. The effectiveness of the proposed design, analysis, and optimization is demonstrated through simulation and a multi-module reconfigurable prototype.

show abstract

Section: Morphing Skinsmentioning

confidence: 99%

Variable geometry wing-box: toward a robotic morphing wing.

Moosavian¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The fundamental model used in the current research can be found in the work given by Homison and Weiland (2006). (Sundaresan and Leo, 2006a).…”

Section: Model Description Ion Transport Modelmentioning

confidence: 99%

“…I NSPIRED by the nastic movements in the plants kingdom, for example, the Venus Flytrap, the artificial nastic materials, which allow for significant deformation through the mechanism of controlled charge and fluid across the cell membrane, have been utilized in the design of advanced actuators in recent years. These materials can generate large mechanical force through the conversion of chemical energy stored in biofuels with actuation energy density on the order of 100 kJ/m 3 (Sundaresan and Leo, 2006a).…”

Section: Introductionmentioning

confidence: 99%

“…The kinetics model of biological transport devices has been developed to simulate and track the species concentration and membrane potential in excitable cells. Chemical-mechanical models based on thermodynamics of membrane equilibria (Sundaresan and Leo, 2006a) and the analysis based on biochemistry and bioenergetics of the active transport process (Matthews et al, 2006) are able to predict the resulting mechanical response of the nastic actuator, but fail to consider the transient effects. By coupling the response of the active membrane to that of the surrounding polymer matrix of the fluid inclusion, a computational model has been proposed by Homision and Weiland (2006) to predict the transient response of engineered nastic material systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-Scale Model for Mechanical Analysis of Nastic Materials and Structures

Zhang

2011

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Nastic actuators are high energy density active materials that mimic the working processes in the plant kingdom to produce large deformation through the conversion of chemical energy inside the materials. In these actuators, the transport of the charge and fluid across a selectively permeable membrane is controlled to achieve bulk deformation. The permeable membrane may contain biological ion pumps, ion channels, and ion exchangers surrounding fluid-filled cavities embedded within a matrix. To study the working mechanism of the nastic actuators, the coupled process of ion transport and matrix response in nastic materials is characterized at two-scales by developing and solving biological transport models at one scale that are coupled with a finite element model of the matrix at a much larger scale. The emphasis is mainly focused on the mechanical analysis of the multi-actuators array structures. To increase the computational efficiency, the analysis of a nastic structure with multi-actuators is performed using an appropriate homogeneous method. A two-scale model is developed to simulate the mechanical response of the structure composed of multi-actuators. Numerical results are shown to illustrate the validity and efficiency of the proposed method.

show abstract

“…Biologically inspired design has offered many intriguing systems that draw inspiration from natural systems ranging from the simple venus fly trap [1] to flying snakes [2]. These approaches aim to recreate various desired phenomena that are exhibited in nature through careful tailoring of system properties to best match the natural solution.…”

Section: Introductionmentioning

confidence: 99%

Using cellular energy conversion and storage mechanics for bio-inspired energy harvesting

2013

Self Cite

View full text Add to dashboard Cite

Novel biologically-inspired energy harvesting devices constructed with lipid bilayer membranes are studied. Recently the research group has proposed the use of biomolecular unit cells consisting of encapsulated droplets with a lipid bilayer formed at their interfaces, stabilized between the two aqueous compartments. This allows for the rapid study and assessment of the characteristics of the individual unit cell, the insertion of various transport proteins and peptides that shape the response of the unit cell, and the construction of complex networks of these biomolecular systems. The goal of this work is to develop and study methods for constructing energy relevant devices through these biomolecular networks.These networks are highly tailorable, and allow the researcher to alter the embedded proteins/peptides in the lipid bilayer, the bilayer dimensions through the application of compressive forces, and the salt concentrations in the droplets. This allows for a high degree of control over their attributes and outputs. These systems also exhibit collective properties through large networks of the unit cells, allowing for complex sensing and actuation behavior not exhibited by single cells. This paper provides an overview of the development of a model for predicting the performance and output of these energy relevant biomolecular networks as well as preliminary experimental results that demonstrate some of the concepts in action.

show abstract

Chemo-mechanical Model for Actuation Based on Biological Membranes*

Cited by 21 publications

References 8 publications

Variable geometry wing-box: toward a robotic morphing wing.

Variable geometry wing-box: toward a robotic morphing wing.

Two-Scale Model for Mechanical Analysis of Nastic Materials and Structures

Using cellular energy conversion and storage mechanics for bio-inspired energy harvesting

Contact Info

Product

Resources

About