scholarly journals CAD-MBSE Interoperability for the Checking of Design Requirements Based on Assemblability Indicators

2022 ◽  
Vol 12 (2) ◽  
pp. 566
Author(s):  
Rihab Brahmi ◽  
Imen Belhadj ◽  
Moncef Hammadi ◽  
Nizar Aifaoui ◽  
Jean-Yves Choley
Keyword(s):  
Collaborative Work ◽  
Added Value ◽  
Design Solution ◽  
Major Influence ◽  
Assembly Sequence ◽  
System A ◽  
System Engineer ◽  
Speed Reducer ◽  
Design Requirements ◽  
Realization Process

A mechanical product is the result of collaboration between different domains. In this paper we focus on the collaborative work that brings together the system engineer and the designer in the realization process of a mechanical system. A design solution, conceived in the CAD environment, is considered valid if all the specification requirements, defined in the MBSE (Model Based System Engineering) domain, are met. Thus, the preliminary study of these requirements has a major influence on the choice and validation of the design solution. In this paper a methodology for handling the requirements has been detailed. These requirements are classified into two main categories. The first one deals with the product performance and the second addresses the process performance in order to generate the best assembly sequence. Depending on the response of the designed solution to these requirements, it becomes easy to decide not only whether the design solution can be validated or not but also to choose the most optimal assembly sequence that ensures the best operation quality. A validation example of a speed reducer is used to demonstrate the added value of the proposed approach.

Handling Multiple Objectives in Decentralized Design

2005 ◽  
Author(s):  
Vincent Chanron ◽  
Kemper Lewis ◽  
Yayoi Murase ◽  
Kazuhiro Izui ◽  
Shinji Nishiwaki ◽  
...  
Keyword(s):  
Complex Systems ◽  
Design Solution ◽  
Distributed Environments ◽  
Engineering Systems ◽  
Design Problems ◽  
Design Requirements ◽  
Decentralized Design ◽  
Set Based Design ◽  
Standard Techniques ◽  
Different Parts

Most complex systems, including engineering systems such as cars, airplanes, and satellites, are the results of the interactions of many distinct entities working on different parts of the design. Decentralized systems constitute a special class of design under distributed environments. They are characterized as large and complex systems divided into several smaller entities that have autonomy in local optimization and decision-making. A primary issue in decentralized design processes is to ensure that the designers that are involved in the process converge to a single design solution that is optimal and meets the design requirements, while being acceptable to all the participants. This is made difficult by the strong interdependencies between the designers, which are usually characteristic of such systems. This paper proposes a critical review of standard techniques to modeling and solving decentralized design problems, and shows mathematically the challenges created by having multiobjective subsystems. A method based on set-based design is then proposed to alleviate some of these challenging issues. An illustration of its applicability is given in the form of the design of a space satellite.

SWiM

2011 ◽  
pp. 47-68 ◽  
Author(s):  
Christoph Lange ◽  
Michael Kohlhase
Keyword(s):  
Mathematical Knowledge ◽  
Added Value ◽  
Conceptual Base ◽  
System A ◽  
Ontology Language ◽  
Integrated Platform ◽  
Semantic Wiki ◽  
Public Collection ◽  
Term Objective

In this chapter, we present the SWiM system, a prototype semantic wiki for collaboratively building, editing, and browsing mathematical knowledge. SWiM is based on the semantic wiki IkeWiki, but replaces the wiki text with OMDoc, a markup format and ontology language for mathematical documents as the underlying knowledge representation format. Our long-term objective is to evolve SWiM into an integrated platform for ontology-based added-value services. As a social semantic work environment, it will facilitate the creation of a shared, public collection of mathematical knowledge (e.g., for education) and serve scientists as a tool for collaborative development of new theories. We discuss the architecture of the SWiM system focusing on its conceptual base, the OMDoc system ontology. In contrast to other semantic wikis, SWiM uses the system ontology to operationalize the fragments and relations of the underlying representation format, not only the domain ontology, that is, the relations between the represented objects themselves. We will present the prototype implementation of the SWiM system and propose its further evolution into a service platform for science and technology.

Digitalization to Reduce Tasks Without Added Value or Human Contact in a Pandemic

2021 ◽  
pp. 25-45
Author(s):  
Md. Masudul Hassan ◽  
Samira Islam Resmi
Keyword(s):  
Supply Chain ◽  
Labor Markets ◽  
Business Models ◽  
Business Processes ◽  
Added Value ◽  
Major Influence ◽  
Business Context ◽  
Sales Channels ◽  
Human Contact ◽  
Operational Costs

Digitalization is the use of technological innovations within the business context with a major influence on products, services, business processes, sales channels, and supply channels. The associated potential advantages include, among others, increased sales or productivity, innovations in price creation, and new sorts of client interaction. Global enterprises are facing supply chain issues, and consequently, potentially higher operational costs, lower inventory, and the prospects of lower demand will make them reluctant to disburse resources and time to connect in M&A and financing activities, predominantly if valuations of targets remain high. Digitalization of the supply chain (DSC) could be a way that companies can start to strategize and accomplish trade strength against supply chain disturbance. The main focus of this chapter is that digitalization enhances prosperity without human contact in a pandemic, will alter labor markets, and impacts business models.

Numerical Investigations on the Conceptual Design of a Ducted Contra-Rotating Fan

2014 ◽  
Author(s):  
Chao Huo ◽  
Nestor Gonzalez Diez ◽  
Arvind Gangoli Rao
Keyword(s):  
Pressure Ratio ◽  
Advisory Council ◽  
Cfd Simulations ◽  
System A ◽  
The Future ◽  
Design Requirements ◽  
The Given ◽  
Isentropic Efficiency ◽  
Crf System ◽  
The Eu

The Advisory Council for Aeronautics Research in Europe (ACARE) has set an ambitious array of objectives to be accomplished by 2050. It is often claimed that complying with those targets will not require evolution but, rather, revolution. If the growth in aviation has to be sustained in the future then we must come up with radical aircraft and engine configurations which can meet the demands of future aviation. The contra-rotating fan is one such system which can play an important role in the future engine configurations, such as the hybrid engine configuration that is being investigated in the EU cofounded AHEAD project. In order to design a CRF system, a 1-D code has been developed based on the inverse Blade Element Method (BEM) to design a contra rotating fan. The CRF design obtained from this methodology is then analyzed with a full 3D RANS simulation. The numerical analysis revealed that the performance of the first rotor satisfies with the given design requirements in terms of both pressure ratio and isentropic efficiency, thus proving the efficacy of using the 1-D code for designing the CRF. However, the performance of the rear rotor does not reach the design demands. It was observed that there is a strong flow separation around the root and a strong normal shock in the blade passage near the tip. It was found that there is a great difference between the blade metal inlet angles and the relative flow inlet angles near the root of the rear rotor. One of the main reasons for this is the calculation of the axial velocity depending on the vortex design and the resolution of the radial equilibrium. Based on the CFD simulations, the design code could be further modified to improve the design of CRF.

Semantic Similarity Based on Ontology Technology and its Application in Mobile Information Retrieval for Product Design

2009 ◽  
Vol 419-420 ◽  
pp. 741-744
Author(s):  
Yong Jun Zheng ◽  
Zhong Ming Ren ◽  
Dai Zhong Su ◽  
Leslie Arthur
Keyword(s):  
Information Retrieval ◽  
Product Design ◽  
Retrieval System ◽  
Product Information ◽  
Collaborative Work ◽  
Communication Technologies ◽  
Information Retrieval System ◽  
Semantic Relationships ◽  
System A

With recent advances in wireless communication technologies, the world of mobile computing is flourishing with a variety of applications. This paper presents a mobile product information retrieval system that supports collaborative work among remote users. With the development of the system, a knowledge representation framework has been adopted which accommodates semantic relationships and similarity of product data. To illustrate the system developed, a case study in information retrieval for product design is presented．

scholarly journals Automated Exploration of Design Solution Space Applying the Generative Design Approach

2019 ◽  
Vol 1 (1) ◽  
pp. 1085-1094 ◽  
Author(s):  
Haibing Li ◽  
Roland Lachmayer
Keyword(s):  
Solution Space ◽  
Complex Problem ◽  
Design Approach ◽  
Design Solution ◽  
Generative Design ◽  
Design Elements ◽  
Design Requirements ◽  
Design Solutions ◽  
Feasible Solutions

AbstractDesign is a complex problem-solving activity that transforms design restrictions and requirements into a set of constraints and explores the feasible solutions to satisfy those constraints. However, design solutions generated by traditional modeling approaches are hardly to deal with such constraints, particularly for the exploration of the possible design solution space to enhance the quality of the design outputs and confront the evolving design requirements. In this regard, the Generative Design Approach (GDA) is considered as an efficient method to explore a large design solution space by transforming the design problem into a configuration problem. Fundamentally, GDA explores and stores all the necessary knowledge through a design skeleton and a set of design elements. Thus, design solution space is easily explored by configuring variable design elements via iterative design processes. Further, the output model is not only a design solution but also a design concept that designers could manipulate to explore unconsidered design configurations. Finally, a crank creation as a running example confirmed that GDA provides concrete aids to enhance the diversity of design solutions.

scholarly journals Automated Conditional Screening of Multiple Escherichia coli Strains in Parallel Adaptive Fed-Batch Cultivations

2020 ◽  
Vol 7 (4) ◽  
pp. 145
Author(s):  
Sebastian Hans ◽  
Benjamin Haby ◽  
Niels Krausch ◽  
Tilman Barz ◽  
Peter Neubauer ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Developmental Stages ◽  
Added Value ◽  
Major Influence ◽  
Cell Factory ◽  
Sufficient Information ◽  
Limited Information ◽  
Fed Batch ◽  
Scale Down ◽  
Oscillating Glucose

In bioprocess development, the host and the genetic construct for a new biomanufacturing process are selected in the early developmental stages. This decision, made at the screening scale with very limited information about the performance in larger reactors, has a major influence on the efficiency of the final process. To overcome this, scale-down approaches during screenings that show the real cell factory performance at industrial-like conditions are essential. We present a fully automated robotic facility with 24 parallel mini-bioreactors that is operated by a model-based adaptive input design framework for the characterization of clone libraries under scale-down conditions. The cultivation operation strategies are computed and continuously refined based on a macro-kinetic growth model that is continuously re-fitted to the available experimental data. The added value of the approach is demonstrated with 24 parallel fed-batch cultivations in a mini-bioreactor system with eight different Escherichia coli strains in triplicate. The 24 fed-batch cultivations were run under the desired conditions, generating sufficient information to define the fastest-growing strain in an environment with oscillating glucose concentrations similar to industrial-scale bioreactors.

A Complexity-Based Approach to Robust Design and Structural Assessment of Aero Engine Components

2007 ◽  
Author(s):  
D. Lomario ◽  
G. P. De Poli ◽  
L. Fattore ◽  
J. Marczyk
Keyword(s):  
Design Space ◽  
Response Surfaces ◽  
Probability Density Functions ◽  
Test Cases ◽  
System A ◽  
Aero Engine ◽  
Novel Method ◽  
Design Requirements ◽  
Definition Of ◽  
Engine Components

This paper presents a complexity-based methodology for the design of aero engine components. Upon a rigorous definition of complex system, a metric for the complexity is introduced as a function of system’s topology and entropy. As a consequence, complexity becomes a measurable and manageable property of systems. Furthermore, a novel definition of robustness is provided, based on the shape of the probability density functions (PDF) of the performances. Complexity and robustness are related together by a simple, qualitative law. Based on these premises, two algorithms are introduced, namely the Stochastic Design Improvement (SDI) and the Complex Systems Analyzer (CSA). The former searches the design space seeking for solutions which meet the design requirements. The latter extracts the fundamental features of the design, previously perturbed by means of Monte Carlo Simulation (MCS). The SDI is proposed as a competitor of the practice of optimization. Though both can be used separately, the combination of SDI and CSA provides a powerful novel method for design. The capabilities of the algorithms are illustrated on three test-cases, namely an LPT Casing, a Turbo-prop bearing retainer and an LPT disk. It is important to point out that response surfaces or other surrogates have never been used.

Analysis and Design of the “Solar One” Thermal Storage Subsystem Heat Exchangers

1984 ◽  
Vol 106 (3) ◽  
pp. 279-285
Author(s):  
F. R. Weiner
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
Thermal Storage ◽  
Design Solution ◽  
Process Conditions ◽  
Analysis And Design ◽  
Heat Exchanger Design ◽  
Central Receiver ◽  
Final Design ◽  
Design Requirements

This paper describes the analysis and design of the five kinds of heat exchangers used in the thermal storage subsystem of the 10 MWe Solar Central Receiver Pilot Plant, now becoming more known as “Solar One.” The paper discusses the practices and standards used in the designs of the heat exchangers, lists the heat exchanger design requirements, and discusses the process conditions. The design assumptions and constraints, the geometrical considerations, and the tradeoff studies that were conducted to optimize the designs are also discussed. A description of each heat exchanger reveals the final design solution. Novel and unique features of a power plant that must operate on a daily sun-cycle are identified.

Edge Distance Determination for Aeronautical Thin-Walled Structures with Automated Riveting

2012 ◽  
Vol 184-185 ◽  
pp. 175-179
Author(s):  
Fei Yan Guo ◽  
Zhong Qi Wang ◽  
Bo Yang
Keyword(s):  
Mechanical Design ◽  
Design Solution ◽  
Distance Determination ◽  
Thin Walled Structures ◽  
Edge Distance ◽  
Working Principle ◽  
Design Requirements ◽  
Thin Walled ◽  
Wing Skin ◽  
Automatic Positioning

In the process of automated riveting, the position between the riveting head and the holes distributed on the stringer and wing skin to be riveted will go beyond the design requirements currently. Using the edge distance determination technology to measure and compensate the deviation in time is one effective method to solve this problem. In the dissertation, after the characteristic of the edge distance determination technology is introduced, the working principle of the edge distance tracer apparatus is developed. Based on the mechanical design solution, a pressure sensor is selected to measure the position relationship between the riveting head and the stringer. Then an edge distance tracer apparatus is struck out to detect the deviation, which is an automatic positioning feedback device that can be fit for many kinds of stringers. And the riveting head is operated to meet the design deviation requirements. By using this technology, the drilling precision of the automated riveting system can be effectively improved.

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