Fully integrated design of a probe‐fed open‐ended waveguide filtering antenna using 3‐D printing technology

2021 ◽  
Author(s):  
Yinhua Yu ◽  
Shiyan Wang ◽  
Wenting Ge ◽  
Feng Zhang ◽  
Gang Zhang ◽  
...  
Keyword(s):  
Integrated Design ◽  
Printing Technology ◽  
Fully Integrated

Mechanics of Three-Dimensional Printed Lattices for Biomedical Devices

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Paul F. Egan ◽  
Isabella Bauer ◽  
Kristina Shea ◽  
Stephen J. Ferguson
Keyword(s):  
Elastic Moduli ◽  
Nutrient Transport ◽  
Three Dimensional ◽  
Integrated Design ◽  
Mechanical Efficiency ◽  
Lattice Structures ◽  
Effective Elastic Moduli ◽  
Biomedical Devices ◽  
Fully Integrated ◽  
Polyjet Printing

Advances in three-dimensional (3D) printing are enabling the design and fabrication of tailored lattices with high mechanical efficiency. Here, we focus on conducting experiments to mechanically characterize lattice structures to measure properties that inform an integrated design, manufacturing, and experiment framework. Structures are configured as beam-based lattices intended for use in novel spinal cage devices for bone fusion, fabricated with polyjet printing. Polymer lattices with 50% and 70% porosity were fabricated with beam diameters of 0.4–1.0mm, with measured effective elastic moduli from 28MPa to 213MPa. Effective elastic moduli decreased with higher lattice porosity, increased with larger beam diameters, and were highest for lattices compressed perpendicular to their original build direction. Cages were designed with 50% and 70% lattice porosities and included central voids for increased nutrient transport, reinforced shells for increased stiffness, or both. Cage stiffnesses ranged from 4.1kN/mm to 9.6kN/mm with yielding after 0.36–0.48mm displacement, thus suggesting their suitability for typical spinal loads of 1.65kN. The 50% porous cage with reinforced shell and central void was particularly favorable, with an 8.4kN/mm stiffness enabling it to potentially function as a stand-alone spinal cage while retaining a large open void for enhanced nutrient transport. Findings support the future development of fully integrated design approaches for 3D printed structures, demonstrated here with a focus on experimentally investigating lattice structures for developing novel biomedical devices.

High Load Jacking Frames for Pin and Hanger Replacement at the Robert Moses Causeway

2020 ◽  
pp. 036119812095907
Author(s):  
Liwei Han ◽  
Qi Ye ◽  
Dan Wei
Keyword(s):  
New York ◽  
Computational Study ◽  
Global Analysis ◽  
Integrated Design ◽  
Integrated Approach ◽  
Efficient Design ◽  
Fully Integrated ◽  
Bridge Structures ◽  
Integrated Design Approach ◽  
Aging Steel

An innovative design of jacking frames was developed for pin and hanger replacement in Robert Moses Causeway (RMC) bridge in Suffolk County, New York. The robust and efficient design of the jacking frames results in a system with improved safety, performance, constructability, and economy. A fully integrated approach for design, fabrication, and construction was employed for higher quality and efficiency. A detailed and precise 3D model was created and directly used for finite element (FE) modeling, producing contract and shop drawings, and designing of temporary work platforms. This paper provides an overview of the integrated design approach and system design, and documents the computational study for this system (global analysis, stress analysis, and large-displacement stability analysis). There are many aging steel bridges in the U.S. and abroad that have similar pin and hanger systems, and jacking frames will be needed to replace those pins and hangers when they exhaust their useful service life. The concepts and details of the jacking frames can easily be emulated by engineers for developing similar safe and robust systems for suspended truss spans and other applicable bridge structures.

scholarly journals SPATIAL DESIGN ANALYSIS DALAM PROSES PERENCANAAN DAN PERANCANGAN INTERIOR

2018 ◽  
Vol 3 (2) ◽  
pp. 62
Author(s):  
Cahyatika Try Widiyanti
Keyword(s):  
Interior Design ◽  
Design Science ◽  
Human Life ◽  
Integrated Design ◽  
Design Concept ◽  
Design Problems ◽  
Fully Integrated ◽  
Spatial Design ◽  
The Right ◽  
Planning Concepts

The design of inner space or better known as interior design is the study of design in a building and used to solve human problems. One of scientific studies based on design science, this scientific field aims to beable to create a built environment (inner space) along with its supporting elements, both physical and non-physical. So that the quality of human life in it becomes better.The interior design process aims to solve complex problems related to human response to space. To be able to solve the problem in its entirety, it requires an appropriate design concept. The success of the design concept depends on the approach taken in the preparation process.Interior spatial concepts can be built by understanding several things, including: components of design understanding, analytical design schemes, design mindset mapping, design approach methods, and ending with the design concept used in interior planning & design processes. By understanding these things, a scope of interior design in solving design problems is expected to be resolved clearly and systematically, so that the process of drafting the proper interior design & planning concepts can be done more easily. The right concept will eventually be able to tie the design results into a fully integrated design

scholarly journals Low-power electronics for energy harvesting sensors

2014 ◽  
Vol 1 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Steven Dunbar ◽  
Zoya Popović
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Low Voltage ◽  
Integrated Design ◽  
Storage Element ◽  
Fully Integrated ◽  
Point Tracking ◽  
Transient Nature ◽  
Power Point ◽  
Power Application

This paper addresses low-power, low-voltage electronic circuit requirements for wireless sensors with energy harvesting. The challenges of start-up for micro-controller unit (MCU)-based energy-harvesting platforms is discussed where a transient, low-voltage (20–1000 mV), low-power (<100 μW) source having a relatively high source impedance (possibly >500 Ω) is used. Efficient converter circuitry is required to transform the low-voltage output from the source to a level suitable for typical electronic devices, 1.8–5 V, and a prototype is demonstrated in the paper. Owing to the limited energy available to deliver to the storage element, the converter output voltage typically has a slow rising slew rate that can be a problem for MCUs. This necessitates a reset circuit to hold-off operation until a level high enough for reliable operation is achieved. Once operational, Maximum Power Point Tracking (MPPT) extracts peak power from the harvester while simultaneously tracking the transient nature of the source. In this low-power application, MCU programming needs to be efficient, while otherwise keeping the MCU in the lowest power standby mode possible to conserve energy. In a fully integrated design, a single MCU may be used for the sensor application, power management, power conversion, and MPPT functions.

Fully Integrated Design of Intrinsically Stretchable Electrodes for Stretchable Supercapacitors

2021 ◽  
Author(s):  
Hongchun Mu ◽  
Wenqiang Wang ◽  
Laifu Yang ◽  
Jin Chen ◽  
Xingwei Li ◽  
...  
Keyword(s):  
Integrated Design ◽  
Fully Integrated

scholarly journals Towards an integrated automatic design process for robot swarms

2021 ◽  
Vol 1 ◽  
pp. 112
Author(s):  
Darko Bozhinoski ◽  
Mauro Birattari
Keyword(s):  
Design Process ◽  
Design Method ◽  
Integrated Design ◽  
Automatic Design ◽  
Control Software ◽  
Fully Integrated ◽  
Robot Swarm ◽  
Robot Swarms ◽  
Integrated Design Process ◽  
Optimization Based Design

Background: The specification of missions to be accomplished by a robot swarm has been rarely discussed in the literature: designers do not follow any standardized processes or use any tool to precisely define a mission that must be accomplished. Methods: In this paper, we introduce a fully integrated design process that starts with the specification of a mission to be accomplished and terminates with the deployment of the robots in the target environment. We introduce Swarm Mission Language (SML), a textual language that allows swarm designers to specify missions. Using model-driven engineering techniques, we define a process that automatically transforms a mission specified in SML into a configuration setup for an optimization-based design method.  Upon completion, the output of the optimization-based design method is an instance of control software that is eventually deployed on real robots. Results: We demonstrate the fully integrated process we propose on three different missions. Conclusions: We aim to show that in order to create reliable, maintainable and verifiable robot swarms,  swarm designers need to follow standardised automatic design processes that will facilitate the design of control software in all stages of the development.

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