Generation of Conceptual Design for Structural Shapes and Functional Elements of Machine Systems Having no Preconceptions Concerning the Design

1994 ◽  
Author(s):  
Masataka Yoshimura ◽  
Kohji Nose
Keyword(s):  
Conceptual Design ◽  
Initial Conditions ◽  
Design Method ◽  
Functional Element ◽  
Industrial Robots ◽  
Feasible Region ◽  
Structural System ◽  
Functional Elements ◽  
Rotational Joint ◽  
Machine Systems

Abstract This paper presents a methodology for generating conceptual designs of structural shapes and functional elements of machine systems from initial conditions having no preconceived information. Firstly, a feasible design region initially containing nothing is defined. The whole feasible region which is uniformly filled up with finite elements having an extremely low rigidity is here assumed to be a region containing nothing. Then, a seed element grows into a whole structural system in the feasible design region by conducting both the creation of external shapes and the growth of the inner structures. Next, the design method is advanced so that a functional element of a rotational joint is also generated with the structural shapes simultaneously. Finally, the proposed conceptual design method is applied to design of industrial robots.

The Study on the Innovation Bicycle Design Using Functional Element Characteristics

2015 ◽  
Vol 764-765 ◽  
pp. 383-387
Author(s):  
Nien Te Liu ◽  
Chang Tzuoh Wu ◽  
Yung Chun Lin
Keyword(s):  
Design Method ◽  
Development Stage ◽  
Functional Element ◽  
Creative Design ◽  
Functional Elements ◽  
Design Elements ◽  
Symbol Table ◽  
Design Competition ◽  
Bicycle Design

The design method on bicycle’s functional elements proposed by this research is based on analysis on the winning work in the Global Bicycle Design Competition. Via analyzing its creative design on functional elements, our study is aimed to establish a creative design method on bicycle for designers to develop lots of creative ideas at the concept development stage. This research is divided into three stages, including analysis on bicycle’s creative design elements, construction of creative design method flow on bicycle’s functional elements, and case study on design prototype. For analysis on bicycle’s creative design elements, we have come up with a symbol table of bicycle’s creative functional elements (CFEs). As to construction of creative design method flow on bicycle’s functional elements, we first asked the designer to describe his/her design theme, and then picked bicycle’s CFEs according to the contents described. After CFEs were picked, we then conducted the space position arrangement of functional element symbols. Based on designer’s requirements, we produced several kinds of space arrangements on CFEs, and then we designed a new bicycle by referring to the symbol table of bicycle’s CFEs acquired. In the final step, we followed the flowchart of bicycle’s CFEs constructed by this research, and proceeded a case study prototype design.

scholarly journals Configuration Study of Electric Helicopters for Urban Air Mobility

Aerospace ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 54
Author(s):  
Julia A. Cole ◽  
Lauren Rajauski ◽  
Andrew Loughran ◽  
Alexander Karpowicz ◽  
Stefanie Salinger
Keyword(s):  
Conceptual Design ◽  
Urban Areas ◽  
Design Space ◽  
Design Method ◽  
Urban Air ◽  
Main Rotor ◽  
Potential Benefits ◽  
Compound Helicopter ◽  
Configuration Changes

There is currently interest in the design of small electric vertical take-off and landing aircraft to alleviate ground traffic and congestion in major urban areas. To support progress in this area, a conceptual design method for single-main-rotor and lift-augmented compound electric helicopters has been developed. The design method was used to investigate the feasible design space for electric helicopters based on varying mission profiles and technology assumptions. Within the feasible design space, it was found that a crossover boundary exists as a function of cruise distance and hover time where the most efficient configuration changes from a single-main-rotor helicopter to a lift-augmented compound helicopter. In general, for longer cruise distances and shorter hover times, the lift-augmented compound helicopter is the more efficient configuration. An additional study was conducted to investigate the potential benefits of decoupling the main rotor from the tail rotor. This study showed that decoupling the main rotor and tail rotor has the potential to reduce the total mission energy required in all cases, allowing for increases in mission distances and hover times on the order of 5% for a given battery size.

Practitioner-friendly design method to improve the seismic performance of RC frame buildings

2021 ◽  
pp. 875529302098801
Author(s):  
Orlando Arroyo ◽  
Abbie Liel ◽  
Sergio Gutiérrez
Keyword(s):  
Seismic Performance ◽  
Design Method ◽  
Three Dimensional ◽  
Rc Frame ◽  
Structural System ◽  
Standard Code ◽  
Frame Buildings ◽  
Rc Frame Buildings ◽  
Mathematical Justification ◽  
Story Building

Reinforced concrete (RC) frame buildings are a widely used structural system around the world. These buildings are customarily designed through standard code-based procedures, which are well-suited to the workflow of design offices. However, these procedures typically do not aim for or achieve seismic performance higher than code minimum objectives. This article proposes a practical design method that improves the seismic performance of bare RC frame buildings, using only information available from elastic structural analysis conducted in standard code-based design. Four buildings were designed using the proposed method and the prescriptive approach of design codes, and their seismic performance is evaluated using three-dimensional nonlinear (fiber) models. The findings show that the seismic performance is improved with the proposed method, with reductions in the collapse fragility, higher deformation capacity, and greater overstrength. Furthermore, an economic analysis for a six-story building shows that these improvements come with only a 2% increase in the material bill, suggesting that the proposed method is compatible with current project budgets as well as design workflow. The authors also provide mathematical justification of the method.

scholarly journals Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

2020 ◽  
Vol 10 (4) ◽  
pp. 1300 ◽  
Author(s):  
Xin Zhao ◽  
Zhou Zhou ◽  
Xiaoping Zhu ◽  
An Guo
Keyword(s):  
Low Temperature ◽  
Conceptual Design ◽  
Unmanned Aerial Vehicle ◽  
Design Method ◽  
Structure Design ◽  
Control Law ◽  
Trajectory Tracking Control ◽  
Plateau Area ◽  
Aerial Vehicle ◽  
Solar Powered

This paper describes our work on a small, hand-launched, solar-powered unmanned aerial vehicle (UAV) suitable for low temperatures and high altitudes, which has the perpetual flight potential for conservation missions for rare animals in the plateau area in winter. Firstly, the conceptual design method of a small, solar-powered UAV based on energy balance is proposed, which is suitable for flight in high-altitude and low-temperature area. The solar irradiance model, which can reflect the geographical location and time, was used. Based on the low-temperature discharge test of the battery, a battery weight model considering the influence of low temperature on the battery performance was proposed. Secondly, this paper introduces the detailed design of solar UAV for plateau area, including layout design, structure design, load, and avionics. To increase the proportion of solar cells covered, the ailerons were removed and a rudder was used to control both roll and yaw. Then, the dynamics model of an aileron-free layout UAV was developed, and the differences in maneuverability and stability of aileron-free UAV in plateau and plain areas were analyzed. The control law and trajectory tracking control law were designed for the aileron-free UAV. Finally, the flight test was conducted in Qiangtang, Tibet, at an altitude of 4500 m, China’s first solar-powered UAV to take off and land above 4500 m on the plateau in winter (−30 °C). The test data showed the success of the scheme, validated the conceptual design method and the success of the control system for aileron-free UAV, and analyzed the feasibility of perpetual flight carrying different loads according to the flight energy consumption data.

The Study on the Functional Element Representations for Bicycles with Creative Characteristics

2013 ◽  
Vol 284-287 ◽  
pp. 3691-3695
Author(s):  
Nien Te Liu ◽  
Chang Tzuoh Wu
Keyword(s):  
Concept Development ◽  
Functional Element ◽  
Functional Elements

The purpose of this paper is to propose representations for bicycles with creative characteristics. First of all, many creative bicycles are collected from references and websites. Then, these bicycles are analyzed and arranged one by one to find creative characteristics. Finally, the representations for creative bicycles are proposed. The construction elements of bicycles can be classified into 3 kinds: functional elements, shape elements, and material elements. For the functional elements, they are classified into 14 kinds, and controlling, moving, input elements are necessary for bicycles. There are two types of constructions for bicycles. One is bicycle with frames, another is without frames. Bicycles with frames always have wheels connected and should be represented from frames as start. Bicycles without frames can be represented from controlling, moving, or input elements as start. The relationships for functional elements are mergence and combination. The most important result of this paper is the functional elements representations are proposed for bicycles with creative characteristics. By using graphs and symbols, bicycles can be represented simple and quickly for concept development.

Conceptual Design of Kenaf Polymer Composites Automotive Spoiler Using TRIZ and Morphology Chart Methods

2015 ◽  
Vol 761 ◽  
pp. 63-67 ◽  
Author(s):  
Muhd Ridzuan Mansor ◽  
S.M. Sapuan ◽  
A. Hambali ◽  
Edi Syam Zainudin ◽  
A.A. Nuraini
Keyword(s):  
Polymer Composites ◽  
Conceptual Design ◽  
New Product Development ◽  
Design Method ◽  
Idea Generation ◽  
Development Stage ◽  
Concept Development ◽  
Design Stage ◽  
Concept Design ◽  
Solution Strategies

Spoilers are part of an automotive exterior bodywork system that acts to create additional down force for higher traction. In this paper, a new conceptual design of automotive spoiler component using kenaf polymer composites was developed using integrated TRIZ and morphology chart design method. The aim is to enable direct application of kenaf polymer composites to the spoiler design to achieve better environmental performance of the component while maintaining the required structural strength for safe and functional operation. The overall process involved two major stages, which are the idea generation and concept development. TRIZ method was applied in the idea generation stage where specific solution strategies for the design were created. In the concept development stage, the specific TRIZ solution strategies obtained were later refined into relevant alternative system elements using Morphology chart method. Finally, a new conceptual design of an automotive spoiler was developed using the combination of the identified system elements. The integrated TRIZ and morphology chart method were found to be new tools that can be used effectively in the concept design stage, especially in cases where direct material substitution is given the main focus for the new product development.

ON THE CHARACTERISTICS OF FUNCTIONAL ELEMENTS FOR INNOVATIVE DESK LAMP CONCEPTUAL DESIGN

2017 ◽  
Vol 41 (3) ◽  
pp. 457-467
Author(s):  
Nien-Te Liu ◽  
Chang-Tzuoh Wu ◽  
Jia-Cin Li
Keyword(s):  
Conceptual Design ◽  
Functional Elements ◽  
Composite Type ◽  
Conceptual Designs

Desk lamp designers tend to focus on the structure of lamps and not consider the option of incorporating new, innovative designs. Creative functional elements and innovative illustrations for desk lamps are proposed in this study. The main creative functional elements are lamp shades, bases, hinges, and pipes. There are three connecting types for these main creative functional elements: the assembled type, the composite type, and the integrated type. These principles are applied to create three creative functional elements and three connecting types that are subsequently used to generate three innovative conceptual designs.

Study of Conceptual Design of the Extension Method for Mechanical Products

2002 ◽  
Author(s):  
Yanwei Zhao ◽  
Guoxian Zhang
Keyword(s):  
Conceptual Design ◽  
Design Method ◽  
Extension Method ◽  
The Core ◽  
Function Decomposition ◽  
Core Technology ◽  
Mechanical Products ◽  
Function Expression ◽  
The Given ◽  
Important Significance

On the foundation summing up existing intelligent conceptual design method, this paper puts forward the research content, characters, path, and method of the conceptual design of extension for mechanical products. This paper rounds the core technology of intelligent conceptual design to research the modeling method of extension design in function-principle-layout-configuration. It includes the function expression, function decomposition and synthesis, function illation and decision. The computers are utilized to simulate the human dialectic thought when resolve problems in this method. The given example shows that the extension method has been applied in the field of conceptual design for mechanical products. This method has important significance to resolve the bottleneck problem of theory studying and engineering realizing of intelligent CAD.

Function and Mechanism Formalization in Task Based Conceptual Design Method

2012 ◽  
Author(s):  
H. V. Darbinyan
Keyword(s):  
Conceptual Design ◽  
Mechanical Design ◽  
Design Method ◽  
General Concept ◽  
Design Tool ◽  
Concept Design ◽  
Scope Of Application ◽  
Core Idea ◽  
And Function ◽  
Mechanical Objects

Mechanism and function formalization problem is touched in a novel task based conceptual mechanical design method. The general concept and a specific application of this method were reported in earlier publications. Direct dependence between the function and mechanism, identical synthesis tools for various stages of design and for various mechanical objects are the features making the suggested method advantageously different from existing concept design approaches. The core idea of suggested conceptual design method is the direct relation between challenged function and the mechanical entity which is in charge of implementing the requested function. The existing task based conceptual design methods are not satisfying the designer’s needs for scope of application, universality of design means, visualization and formalization of both mechanical and functional fields. Formalization of functions and mechanisms is an important design tool that will facilitate synthesis, analyzes, visualization and archiving (data base creating) processes of mechanical development. Further progress in unveiling the resources of the suggested design method is mostly based on development of formalization means for both categories of functions and mechanisms. The current study is unveiling newly developed function and mechanism description language that is helping to formalize both mechanical and functional categories facilitating their involvement in design process and making the description of a new product’s mechanical development easy and understandable. Function formalization in conjunction with mechanism formalization allows to formulate precisely the design task and concentrate the designer’s attention on solution of a single task strictly arranged in the hierarchical function tree of all involved tasks and functions.

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