Thick Film Accelerometers in LTCC Technology—Design Optimization, Fabrication, and Characterization

2008 ◽  
Vol 5 (4) ◽  
pp. 150-155 ◽  
Author(s):  
Holger Neubert ◽  
Uwe Partsch ◽  
Daniel Fleischer ◽  
Mathias Gruchow ◽  
Alfred Kamusella ◽  
...  
Keyword(s):  
Design Optimization ◽  
Thick Film ◽  
Probability Distributions ◽  
Pressure Sensors ◽  
Measurement Data ◽  
Design Parameters ◽  
Optimized Design ◽  
System Failure ◽  
Functional Requirements ◽  
Leaf Springs

Diaphragms and beams for force and pressure sensors, e.g., are state of the art in mechanical elements of MEMS in LTCC technology. These elements sustain small strains and small deformations under load. A number of sensor and actuator applications, however, require movable elements that allow higher deformations while the local strains are still low. Springs, accelerometers, actuators, positioners, and valves are examples of such applications. For an accelerometer we developed an approach fabricate leaf springs, integrated into the LTCC technology. The working principle of the accelerometer is based on a seismic mass disposed on two parallel leaf springs that carry piezoresistors connected such that they form a measuring bridge. In the first design optimization step, we used an FEA model for finding an optimized design meeting our sensitivity requirements, inclusiding resonance frequency. In the second step, we made a tolerance analysis that calculates the probability distributions of functional variables from the probability distributions of the design parameters. This enables the probability of a system failure to be deduced. In a final design step, a design of the ceramic thick film accelerometer was calculated that minimizes the system failure probability. As a result we obtained a design optimized with respect to a set of functional requirements and design tolerances. The results of the computations using the FEA models were compared to results of measurement data acquired from prototypes of the accelerometer.

scholarly journals BIM Based Design Optimization Framework for the Energy Efficient Buildings Design in Turkey

2018 ◽  
Vol 2018 (1) ◽  
Keyword(s):  
Design Optimization ◽  
Technology Implementation ◽  
Energy Efficient ◽  
Building Design ◽  
Energy Performance ◽  
Design Stage ◽  
Design Parameters ◽  
Optimized Design ◽  
Process Technology ◽  
Design Guide

Buildings in Turkey consume a great amount of energy to supply comfort conditions. This is due to the ineffective design decisions by designers with no consideration of the environmental impact and energy efficiency. Thus, building design parameters should be studied and examined during the design stage considering the environment that is a crucial factor for the energy efficient building design, which may lead to better energy performance and fewer CO2 emission. BIM as a new way of working methodology enables energy efficient design solutions considering design parameters for the improved high building performance in Turkey. Therefore, this research aims to develop a strategic BIM framework encapsulating the optimized design process, technology implementation, building design rules considering the local values and energy performance assessment of the concept building design. Research adopts multi case studies methodology that helps to gain qualitative and quantitative insights and understand the current practices. Revit based BIM modelling is used with Design Builder for energy performance simulation in relation to the building design parameters. The outcome will be a design guide for the energy optimised building design in Turkey. This design guide will help designers to successful use of BIM for design optimization process, effective technology implementation, rules-based design development and energy assessment scheme reflecting local values for sustainable building design.

Coupled-Field Finite Element Analysis of MEMS Compound Electrostatic Actuator by Using the ANSYS Software

2012 ◽  
Vol 214 ◽  
pp. 929-934 ◽  
Author(s):  
Yin Jun Chen ◽  
Qing Hua Chen ◽  
Yan Mei Li ◽  
Wen Gang Wu
Keyword(s):  
Microelectromechanical Systems ◽  
Pressure Sensors ◽  
Design Parameters ◽  
Optimized Design ◽  
Parallel Plates ◽  
Electrostatic Actuator ◽  
Electrostatic Actuators ◽  
Optical Device ◽  
Silicon Bulk ◽  
Electromechanical Performance

MEMS (Microelectromechanical Systems) electrostatic actuators have been successfully applied in a number of areas, including accelerometers, gyroscopes, pressure sensors, and optical devices. In this paper, the actuator optimization of a silicon bulk-micro machined MEMS compound electrostatic actuator of an optical device is discussed. The actuator uses folded-beam structure to enhance the electromechanical performance. The movable block is connected to the compound electrostatic actuator through unequal-height folded-beam springs. The lower-height springs connect the block with parallel plates, and can convert the descending motion of the plates into out-of-plane tilting motion of the block efficiently Additionally, the block is capable of in-plane motion by applying the driving force of the comb-drive actuator through structural connection. ANSYS FEM simulation is used to extract the device electromechanical performance and resonant frequency of the device. By gradually varying the design parameters in ANSYS simulation, the relationship between the actuator electromechanical performance and various design parameters is derived. The curves of actuator electromechanical performance versus beam length and beam height are derived and they are in good agreement with theoretical prediction. From the analysis it is concluded that the actuator behavior strongly depends upon various actuator parameters. By adjusting design parameters, desired electromechanical performance can be obtained. Based on the simulation results, a set of optimized design parameters for the compound electrostatic actuator is decided. The above-proposed MEMS compound electrostatic actuator may be used for many applications, such as optical device and micro-operating.

scholarly journals Design Optimization and FE Analysis of 3D Printed Carbon PEEK Based Mono Leaf Spring

Micromachines ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 279 ◽  
Author(s):  
Amir Kessentini ◽  
Gulam Mohammed Sayeed Ahmed ◽  
Jamel Madiouli
Keyword(s):  
Finite Element ◽  
Design Optimization ◽  
Polymer Composite ◽  
Material Selection ◽  
Design Parameters ◽  
Leaf Spring ◽  
Bending Stress ◽  
Leaf Springs ◽  
Percentage Volume ◽  
3D Printed

In this research work, design optimization and static analysis of a 3D printed based carbon PEEK (poly ether ether ketone, reinforced with carbon) polymer composite mono leaf spring was done using finite element analysis. Comparative study of leaf springs of a Dodge SUV car has been made by using 3D printed carbon PEEK. The main objective of this work is to optimize the design and material parameters, such as fiber diameter, fiber length, percentage volume of fibers and orientation angle of fibers in 3D printed based material with a mono polymer composite leaf spring. The effects of these parameters were studied to evaluate the deflection, bending stress, spring rate, stiffness and von Mises stress under different loading conditions. Furthermore investigation has been done to reduce the weight of leaf springs and claimed the 3D printed based leaf springs have better load carrying capacity. Thus an attempt has been made in this regard and we selected the 3D printed carbon PEEK in developing product design and material selection for minimum deflection and bending stress by means of response surface optimization methodology for an efficient leaf spring suspension system. The 3D printed carbon fiber polymer composite has three different percentage volume fractions such as 30%, 50%, and 60%. The selected carbon PEEK has 0°, 45°, and 90° fiber orientations. Finite element based analysis has been performed on 3D printed carbon PEEK material to conclude the optimized design parameters and best possible combination of factors affecting the leaf spring performance.

Turbine Airfoil Design Optimization

1996 ◽  
Author(s):  
Sanjay Goel ◽  
John I. Cofer ◽  
Hardev Singh
Keyword(s):  
Design Optimization ◽  
Three Dimensional ◽  
Design Procedure ◽  
Optimization Techniques ◽  
Optimized Design ◽  
Two Dimensional ◽  
Functional Requirements ◽  
Three Dimensional Model ◽  
Direct Optimization ◽  
Direct Design

A new blade design methodology, which allows designers to react rapidly to changes in functional requirements of turbines and transition quickly from concept to design, has been discussed in this paper. This methodology reduces the design cycle time by creating a three-dimensional model of the blade, through concurrent design of multiple two-dimensional blade sections. An efficient direct design procedure has been developed by coupling direct optimization techniques with two-dimensional aerodynamic analysis codes. A method for interpreting the flowfield solution to compute the airfoil quality has been developed and is used to compute the objective function during optimization. Aerodynamic, mechanical and geometry constraints are imposed on the design to ensure that the optimized design meets feasibility requirements of all engineering disciplines. During the design optimization process, the designers’ interactions are simulated through use of rules that are based on designer heuristics. This procedure is used for the design of a high pressure, steam turbine blade; the results are discussed in this paper.

scholarly journals Optimized Design of a Novel Hydraulic Propeller Turbine for Low Heads

Designs ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 20
Author(s):  
Dario Barsi ◽  
Marina Ubaldi ◽  
Pietro Zunino ◽  
Robert Fink
Keyword(s):  
Design Optimization ◽  
High Efficiency ◽  
Single Point ◽  
Design Procedure ◽  
Optimization Procedure ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Practical Case ◽  
Optimized Design ◽  
Starting Point

In the present paper, an optimized design procedure capable of providing the geometry of a high efficiency compact hydraulic propeller turbine for low head is proposed and developed. The turbine preliminary design is based on fundamental turbomachinery mean-line equations and on the employment of statistical correlations, which relate the main geometrical parameters to the fundamental design parameters. The first obtained geometry represents the starting point of an automated aerodynamic single point optimization procedure based on a genetic algorithm generating and updating a wide database of turbine geometries. The approach employs a three-dimensional (3D) Reynolds averaged Navier–Stokes (RANS) solver for the construction of the corresponding database of performance. A meta-model, such as an artificial neural network (ANN), is used to speed up the design optimization process. The procedure has been applied on the practical case of a novel simplified hydraulic propeller turbine prototype for very low heads. The adopted design optimization procedure is able to modify the turbine blade and vane geometries in order to achieve automatically the targeted net head and the maximum for the total to total internal efficiency once diameter, mass flow rate, and rotational speed are assigned.

Design and Simulation of a MEMS Torsional Micromirror

2013 ◽  
Vol 694-697 ◽  
pp. 1553-1557
Author(s):  
Yi Bo Song ◽  
Zhi Gang Yan
Keyword(s):  
Design Optimization ◽  
Design Parameters ◽  
Torsional Angle ◽  
Optimized Design ◽  
Driving Voltage ◽  
Ansys Simulation ◽  
Angle Rotation ◽  
Torsional Micromirror ◽  
Mathcad Software

In this paper, we designed an electrostatic driving MEMS torsional micromirror. The operation principle of the torsional micromirror is analyzed. Based on the analysis, a set of optimized design parameters of the micromirror is suggested. The design optimization of the micromirror is also performed with MathCAD software. At last an ANSYS simulation is achieved in the paper, which proves that the micromirror can provide a maximum workable torsional angle rotation of ±0.55º with corresponding driving voltage of 17.5V.

scholarly journals Automated and interactive evaluation of welding producibility in an multidisciplinary design optimization environment for aircraft components

2021 ◽  
Author(s):  
Julia Madrid ◽  
Petter Andersson ◽  
Rikard Söderberg ◽  
Kristina Wärmefjord ◽  
Donatas Kveselys ◽  
...  
Keyword(s):  
Design Optimization ◽  
Design Process ◽  
Multidisciplinary Design Optimization ◽  
Welding Process ◽  
Multidisciplinary Design ◽  
Design Parameters ◽  
Functional Requirements ◽  
Welding Quality ◽  
Evaluation Approach ◽  
Welded Structure

AbstractThe automation capabilities and virtual tools within engineering disciplines, such as structural mechanics and aerodynamics, enable efficient Multidisciplinary Design Optimization (MDO) approaches to evaluate and optimize the performance of a large number of design variants during early design stages of aircraft components. However, for components that are designed to be welded, in which multiple functional requirements are satisfied by one single welded structure, the automation and simulation capabilities to evaluate welding-producibility and predict welding quality (geometrical deformation, weld bead geometrical quality, cracks, pores, etc) are limited. Besides the complexity of simulating all phenomena within the welding process, one of the main problems in welded integrated components is the existing coupling between welding quality metrics and product geometry. Welding quality can vary for every new product geometrical variant. Thus, there is a need of analyzing rapidly and virtually the interaction and sensitivity coefficients between design parameters and welding quality to predict welding producibility. This paper presents as a result an automated and interactive welding-producibility evaluation approach. This approach incorporates a data-based of welding-producibility criteria, as well as welding simulation and metamodel methods, which enable an interactive and automated evaluation of welding quality of a large number of product variants. The approach has been tested in an industrial use-case involving a multidisciplinary design process of aircraft components. The results from analyzing the welding-producibility of a set of design variants have been plotted together with the analysis results from other engineering disciplines resulting in an interactive tool built with parallel coordinate graphs. The approach proposed allows the generation and reuse of welding producibility information to perform analyses within a big spectrum of the design space in a rapid and interactive fashion, thus supporting designers on dealing with changes and taking fact-based decisions during the multidisciplinary design process.

scholarly journals A modular design method based on TRIZ and AD and its application to cutter changing robot

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110343
Author(s):  
Mei Yang ◽  
Yimin Xia ◽  
Lianhui Jia ◽  
Dujuan Wang ◽  
Zhiyong Ji
Keyword(s):  
Modular Design ◽  
Design Method ◽  
Idea Generation ◽  
Design Parameters ◽  
Problem Analysis ◽  
Concept Design ◽  
Functional Requirements ◽  
Shield Tunneling ◽  
Structural Hierarchy ◽  
And Performance

Modular design, Axiomatic design (AD) and Theory of inventive problem solving (TRIZ) have been increasingly popularized in concept design of modern mechanical product. Each method has their own advantages and drawbacks. The benefit of modular design is reducing the product design period, and AD has the capability of problem analysis, while TRIZ’s expertise is innovative idea generation. According to the complementarity of these three approaches, an innovative and systematic methodology is proposed to design big complex mechanical system. Firstly, the module partition is executed based on scenario decomposition. Then, the behavior attributes of modules are listed to find the design contradiction, including motion form, spatial constraints, and performance requirements. TRIZ tools are employed to deal with the contradictions between behavior attributes. The decomposition and mapping of functional requirements and design parameters are carried out to construct the structural hierarchy of each module. Then, modules are integrated considering the connections between each other. Finally, the operation steps in application scenario are designed in temporal and spatial dimensions. Design of cutter changing robot for shield tunneling machine is taken as an example to validate the feasibility and effectiveness of the proposed method.

Shape-design optimization of hull structures considering thermal deformation

2013 ◽  
Vol 228 (13) ◽  
pp. 2266-2277
Author(s):  
Myung-Jin Choi ◽  
Min-Geun Kim ◽  
Seonho Cho
Keyword(s):  
Optimal Design ◽  
Design Optimization ◽  
Thermal Deformation ◽  
Parametric Design ◽  
Optimization Method ◽  
Optimization Process ◽  
Design Parameters ◽  
Shape Design ◽  
Shape Design Optimization ◽  
Modified Method

We developed a shape-design optimization method for the thermo-elastoplasticity problems that are applicable to the welding or thermal deformation of hull structures. The point is to determine the shape-design parameters such that the deformed shape after welding fits very well to a desired design. The geometric parameters of curved surfaces are selected as the design parameters. The shell finite elements, forward finite difference sensitivity, modified method of feasible direction algorithm and a programming language ANSYS Parametric Design Language in the established code ANSYS are employed in the shape optimization. The objective function is the weighted summation of differences between the deformed and the target geometries. The proposed method is effective even though new design variables are added to the design space during the optimization process since the multiple steps of design optimization are used during the whole optimization process. To obtain the better optimal design, the weights are determined for the next design optimization, based on the previous optimal results. Numerical examples demonstrate that the localized severe deviations from the target design are effectively prevented in the optimal design.

A Study of the Anchor Effect Based on Structural Parameters of Flexible Pressurized Anchor and Pressure from Surrounding Rock

2011 ◽  
Vol 71-78 ◽  
pp. 4634-4637
Author(s):  
Tian Lin Cui ◽  
Jing Kun Pi ◽  
Yong Hui Liu ◽  
Zhen Hua He
Keyword(s):  
Structural Parameters ◽  
Structural Features ◽  
Surrounding Rock ◽  
Design Parameters ◽  
Optimized Design ◽  
Anchor Effect ◽  
The Finite Element Method ◽  
Anchor System ◽  
New Type ◽  
Stress Relation

In order to optimize the design of flexible pressurized anchor, this paper gives a further analysis on structural features of the new type of flexible pressurized anchor and carries out a contact analysis on anchor system by using the finite element method. It calculates as well as researches the contact stress relation of interactional anchor rod and surrounding rock under the circumstance of anchoring, obtaining the law of all major design parameters of anchor rod structure and pressure from surrounding rock influencing the anchoring performance and arriving at the conclusion that the anchor rod is adapted to various conditions of surrounding rock. They not only serve as important references for optimized design and application of anchor rod, but also provide a basis for the experiment of new type of anchor rod.

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