topology optimization design of flextensional actuator

 

 

 

 

It has long been known that for a given flextensional actuator design, decreasing the frame angle will produce the largest."Topology Optimization of Compliant Mechanical Amplifiers for Piezoelectric Actuators." Abstract. This paper presents a topological-optimization method which applies the theory of ground structure parameterization to design and analyzes aSome researchers have investigated the application of topology optimization to the design of integrated flextensional actuators. Design of dynamic laminate piezoelectric sensors and actuators using topology optimization Paulo Henrique NAKASONE, Emlio Carlos Nelli SILVA (University of So Paulo). Abstract. Topology optimization is a powerful free-form design tool that couples nite ele-ment analysis with mathematical programming toFinally, an algorithm is developed considering the ability to embed discrete ob-jects such as stieners or actuators within a monolithic printed part. ATOM Optimizer Abaqus.Topology optimization is a phrase used to characterize design optimization formulations that allow for the prediction of the lay-out of a structural and mechanical system. Sigmund, O Design of multiphysics actuator using topology optimization-Part II: two material structure.Silva, E.C.N Nishiwaki, S. and Kikuchi, N Topology optimization design of flextensional actuators. Sigmund O (2001) Design of multiphysics actuators using topology optimizationpart i: one-material structures.Silva ECN, Nishiwaki S, Kikuchi N (2000) Topology optimization design of flextensional actuators. Since the mechanical part of flextensional actuators is actually a compliant mechanism, piezoelectric transducer [6] and thermal actuators [7][8] have been also designed using topology optimization technique. Early attention to the topology optimization of compliant mechanisms was focused on the mathematical modeling of the design problem.Sigmund [15] further extended the nonlinear method to the topology optimization of thermoelectrical micro actuators. In the last decade the use of commercial structural optimization software have increased rapidly. An especially interesting eld is topology optimization where opti-mization methods are used to generate a design concept early in the design process. In recent years, topology optimization has been expanded to various elds.

Sigmund [9] proposed micro-thermal- actuator design and Nishiwaki et al. [10] presented extensional actuators using piezoceramic device. Optimum design of flextensional piezoelectric actuators .We consider the topology optimization of a multiphysic model in piezoelectricity into two spatial dimensions. The topological derivative of a tracking-type shape functional is derived in its closed form for the purpose PIEZOELECTRIC FLEXTENSIONAL ACTUATORS New PFA models have been developed using the topology optimization technique, which is a method of computational design that combines an optimization algorithm and finite element modeling (FEM) The considered flextensional transducer allow to obtain a needed stroke amplification, but because of aerodynamic forces and torque act on the flap, the initial actuators stroke significantly reduced.

The main aim of this article is the structural optimization of the actuator design to simultaneously providestrongly enhanced by optimizing the actuated multi-flexible structures with respect to their shape and their topology [6, 7, 8]. The shape sensitivity analysis of suchCitation. R Amigo, S.M. Giusti, A.A. Novotny, E.C.N. Silva, J. Sokolowski. Optimum design of flextensional piezoelectric actuators into 7. Therefore, topology optimization can be applied to the design of flextensional actuators.The objective function described i Eq. (b) was applied considering the coefficient. w 1.0. The topology of flextensional actuator obtained is shown in Fig. Carbonari, RC, Silva, ECN Paulino, GH 2007, Topology optimization design of functionally graded bimorph-type piezoelectric actuators Smart Materials and Structures, vol 16, no. 6, pp. 2605-2620. DOI: 10.1088/0964-1726/16/6/065. In structural design, topology optimization can be regarded as an extension of methods for size optimization and shape optimization. Size optimization considers a structure which can be decomposed into a nite number of members. (b) Amplification of effective strain. Fig. 1. Amplication Principle of Flextensional Mechanisms [9]. minor changes to the following formulation.[22] E. Silva, S. Nishiwaki, and N. Kikuchi, Topology optimization design of extensional actuators, Ultrasonics, Ferroelectrics and Frequency Control The topology optimization design variable is the relative density of optimized space unit. The optimization objective function is the smallest body frame mass. The constraints are bending stiffness and torsion stiffness. Topology optimization design of flextensional actuators. Nelli Silva E.C Nishiwaki S Kikuchi N. IEEE Trans.Electroacoustics. Electroacoustical transducers. Motors, actuators, levitators. A flextensional transducer consist of a piezoceramic connected to a flexible structure which amplifies and changes the direction of generated piezoceramic displacement. In a previous work[1,2] these transducers were designed by using topology optimization method. B. Topological Optimization Design of the Structure.we implement an optimization design for topological. structure of this manipulator. Based on the coupling-. reducing principle of mechanism topology [13], we. Design of flextensional piezoelectric actuator using the topology optimization method. Flextensional Piezoelectric Actuators consist of a flexible structure actuated by piezoelectric ceramics (or a stack of piezoceramics). Topology optimization (integrated design approach). IV. Conclusions. Proceedings of the World Congress on Engineering and Computer Science 2008 WCECS 2008, October 22 - 24, 2008, San Francisco, USA. Optimization methods applied to material and flextensional actuator design using the homogenization method.Shape Design by Integrating Shape Optimization with Topology Optimization for Multiobjective Structures. By developing a dynamic model of a commercially available flextensional actuator, a control scheme can be designed to command its displacement trajectory.The model parameters are estimated by either a least squares or a numerical optimization algorithm. Based on this idea, this work discusses the application of topology optimization combined with the homogenization method and FEM for designing piezocomposite materials and piezoelectricBy designing new kinds of coupling structure flextensional actuators for different tasks can be obtained. 1.2.2 Design and characterization of a displacement amplification system for use in microforming. A lever system using flexure joints, similar to those used in flextensional actuators was designed to amplify the displacement of the Terfenol-D transducer described in detail in. Optimization methods applied to material and flextensional actuator design using the homogenization method.Design of multiphysics actuators using topology optimization Part I: One-material structures Sigmund O. Optimization of periodic structures in the micro level has been extensively researched in the context of ma-terial design, while research on topology optimization for macrostructures is very limited and has great potential both economically and intellectually. Previous works have been shown several advantages in using functionally graded ceramics in the design of flextensional actuators, such as largergraded piezoelectric devices by implementing the Topology Optimization Method (TOM). The goal in using this method is to determine topologies Topology optimization design of flextensional actuators. ECN Silva, S Nishiwaki, N Kikuchi. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 47 , 2000. Electromechanical Properties of a Ceramic d31-Gradient Flextensional Actuator. 997. Monolithic PZT and ZnO samples were also characterized to provide basic material properties.Optimization for Metal-Ceramic Composite Actuator, Moonies, Ferroelectrics The design method based on the extended fixed domain method and global-local modeling (or homogenization) theory is applied to the design of elastic, thermoelastic, and piezoelectric composite materials, and flextensional actuators. rights reserved. Suzuki and Kikuchi [2] considered topology optimization of linear elastic plane structures for the sti est design using the homogenization method.[5] O. Sigmund, Design of multiphysics actuators using topology optimization-Part I: one-material structures, Comput. Some 2-D topologies of flextensional actuator are presented for different applications. Based on this idea, in this research we proposed a design method for flextensional actuator by applying topology optimization techniques and finite element method. In this work, we propose a general method for designing flextensional actuators with large output displacement (or generative force) by applying the topology optimization method. The optimized topology is intuitive for the case where the actuator has been modeled with one la yer of piezoelectric material.Silva, E. C. N S. Nishiwaki, et al. (2000). "Topology Optimization Design of Flextensional Actuators." A free platform for explaining your research in plain language, and managing how you communicate around it so you can understand how best to increase its impact. Topology optimization (TO) is a mathematical method that optimizes material layout within a given design space, for a given set of loads, boundary conditions and constraints with the goal of maximizing the performance of the system. Title: Design of flextensional piezoelectric actuators using topology optimization. Summary : Flextensional piezoelectric actuators consist of a piezoceramic (or a stack of piezoceramics) connected to a flexible OptiStruct as Solver for Topology Optimization Part-2.1 using Altair HW SE - Продолжительность: 47:14 Altair India Student Contest 2 293 просмотра.Design by material domain, mass and loads. ABSTRACT. Controlled flextensional actuators essentially involve a compliant mechanism assembled in association with piezoceramics featuringsystem can be enhanced by designing their elastic structure by means of the Topology Optimization Method (TOM), since an optimized material Some researchers have used topology optimization to design compliant mechanisms that best magnify either the geometric or mechanical advantage ofThis work attempts to justify the inclusion of the PZT polarization vector as a design variable in the design of a flextensional actuator. Experimental verification of flextensional transducers designed by using topology optimization method. Gilder Nader, Emlio C. Nelli Silva, Julio C. Adamowski. Results. Topology optimization design of flextensional actuators.

2000 / IEEE By: Kikuchi, N. Nishiwaki, S. Silva, E.C.N. Piezoelectric-electrostrictive monolithic bi-layer composite flextensional actuator. In structural design, topology optimization can be regarded as an extension of methods for size optimization and shape optimization. Size optimization considers a structure which can be decomposed into a nite number of members. The considered flextensional transducer allows obtaining needed stroke amplification, but because of counteracting forces the initial actuators stroke significantly reduced. The main aim of this article is the optimization of the actuator design to simultaneously provide sufficient stroke and stiffness Key words topology optimization, multi-material designs, effective property, interpolation scheme, micro-mechanics. 1 Introduction The area of computational variable- topology shape design of continuum structures is presently dominated by methods which employ a material distribution

recommended: