Style Design System Based on High-Quality Aesthetic Shapes to Support Designer’s Creative Activity

2013 ◽  
Author(s):  
Fumihiko Kimura ◽  
Tetsuo Oya ◽  
Hideki Aoyama
Keyword(s):  
Automotive Industry ◽  
Previous Method ◽  
Design System ◽  
Creative Activity ◽  
Class A ◽  
Curvature Variation ◽  
Geometric Conditions ◽  
Generating Method ◽  
Aesthetic Standard ◽  
Extension Class

Class A shapes are used as an aesthetic standard mainly in automotive industry. Those used in products’ exterior are closely related to products’ values. Class A shapes have two geometric conditions: The surface has enough geometrical continuity, and smooth and continuous highlight lines. In our previous study, we developed a Class A curve generating method and style design system. Using this system, an user can create a model with several Class A curves. Then, we created a model by this system to evaluate the proposed method. Although we can create an aesthetic shape using this system, some shapes were not good in curvature variation. There is reason why some generated curves didn’t produce Class A shapes. In this study, we investigate more detailed conditions of Class A curve, and improve the Class A shape generating method using Class A curve. In our new method, we extend the range of Class A conditions. By this extension, Class A shape can be generated more efficiently than the previous method. Then, we create a model using this method in order to evaluate the surface quality, and discuss the effectiveness of our system.

scholarly journals Wideband power amplifier based on Wilkinson power divider for s-band satellite communications

2019 ◽  
Vol 8 (4) ◽  
pp. 1531-1536
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Tole Sutikno ◽  
Ammar Alhegazi
Keyword(s):  
Power Amplifier ◽  
Return Loss ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Wireless Networking ◽  
Power Divider ◽  
Design System ◽  
Class A ◽  
Wilkinson Power Divider ◽  
Radar Satellite

This paper presents design and simulation of wideband power amplifier based on multi-section Wilkinson power divider. Class-A topology and ATF-511P8 transistor have been used. Advanced Design System (ADS) software used to simulate the designed power amplifier. The simulation results show an input return loss (S11)-10dB, gain (S21)10 dB over the entire bandwidth, and an output power around 28dBm at the Centre frequency of 3GHz. The designed amplifier is stable over the entire bandwidth (K1). Inter-modulation distortion is -65.187dBc which is less than -50dBc. The designed amplifier can be used for the microwave applications which include weather radar, satellite communication, wireless networking, mobile, and TV.

Style Design System Based on Class A Bézier Curves for High-Quality Aesthetic Shapes

2012 ◽  
Author(s):  
Tetsuo Oya ◽  
Fumihiko Kimura ◽  
Hideki Aoyama
Keyword(s):  
Design System ◽  
Design Tools ◽  
Control Points ◽  
Modeling Framework ◽  
High Quality ◽  
Bezier Curves ◽  
Bézier Curves ◽  
Class A ◽  
Monotone Curvature ◽  
Curvature And Torsion

In this paper, a style design system in which the conditions for Class A Bézier curves are applied is presented to embody designer’s intention by aesthetically high-quality shapes. Here, the term “Class A” means a high-quality shape that has monotone curvature and torsion, and the recent industrial design requires not only aesthetically pleasing aspect but also such high-quality shapes. Conventional design tools such as normal Bézier curves can represent any shapes in a modeling system; however, the system only provides a modeling framework, it does not necessarily guarantee high-quality shapes. Actually, designers do a cumbersome manipulation of many control points during the styling process to represent outline curves and feature curves; this hardship prevents designers from doing efficient and creative styling activities. Therefore, we developed a style design system to support a designer’s task by utilizing the Class A conditions of Bézier curves with monotone curvature and torsion.

The Study of Forklift’s Overall Design System Based on Design Knowledge Reuse

2010 ◽  
Vol 44-47 ◽  
pp. 1234-1239
Author(s):  
Shao Fei Jiang ◽  
Ji Quan Li ◽  
Jing Meng Huang ◽  
Ying Kong
Keyword(s):  
Rapid Response ◽  
Design System ◽  
Design Knowledge ◽  
Design Reuse ◽  
Knowledge Reuse ◽  
Creative Activity ◽  
Overall Design ◽  
Design Knowledge Reuse

The forklift design is a creative activity based on the complexity of knowledge and experience. To fully use the successful experience and knowledge of forklift’s design which have been in using and shorten the period of forklift’s development, to enhance the rapid response ability of enterprises to the markets, we put forward the method of forklift’s design reuse based on CBR, at the same time; develop the overall design system of forklift----HCDesign. Furthermore, we analyze the functions, structures and the implementation module of the system to study some of the key technique, using the case to verify the system’s validity.

scholarly journals Design Characteristics of Venturi Aeration System

2019 ◽  
Vol 8 (11) ◽  
pp. 63-70
Keyword(s):  
Flow Rate ◽  
Interfacial Area ◽  
Design System ◽  
Outlet Section ◽  
Water Tank ◽  
Constant Flow ◽  
Constant Flow Rate ◽  
Geometric Conditions ◽  
Aeration System ◽  
Design Characteristics

The crucial phenomenon of air and water mixing together is called aeration. The venturi aeration is mainly responsible to transfer air directly through the atmosphere into the flowing water attribute to its simplicity and reliability. A water tank of 1000 litres capacity having dimensions 100 × 100 × 100 cm3 was used to conduct the experiments for aeration for the purpose of studying the characteristics of venturi aeration system design. Venturi having three significant sections i.e. inlet, constricted and outlet section, used as a differential pressure producer basis on Bernoulli’s theorem where the middle section of the venturi often called as constricted section is responsible for the energy conversion, which transfers oxygen by aspirating air into the constricted section and producing interfacial area between the air and water. On the basis of dimensional analysis, non-dimensional numbers associated with geometric, dynamic and process parameters were analysed. The non-dimensional geometric parameters like throat length (tl), hole distance from beginning of throat (hd), throat hole diameter (th) were optimized and additionally conducted at constant flow rate (vw=0.396 m/s). To assess the performance of designed venturi, the selection of different tl as 20, 40, 60, 80 and 100 mm, with varying number of holes inserted, depends on the tl and keeping th constant at 2 mm. The SAE values were initiated more with increasing tl . The maximum SAE values was obtained with maximum number of holes open as 6.200 × 10-3 kg O2/kWh for 100 mm tl . A constant flow rate was maintained to construct the equations for the prediction of venturi aeration system’s characteristics via simulations. For the purpose of simulations different geometric conditions of the venturi design system were considered. The simulation equations developed for tl based on the Re and Fr are subjected to 12.655 × 10-5 > Re > 2.531 × 10-5 and 1.251 < Fr < 6.256, respectively. It was also concluded that from the nondimensional study, the simulation equation developed for NDSAE based on the tl be valid and subjected to 3.890× 103 < NDSAE <0.215× 103 .

Parametric Design for Aesthetic Shapes by Curve-Ruler Utilization

2008 ◽  
Author(s):  
Tetsuo Oya ◽  
Hiroshi Kato ◽  
Masatake Higashi
Keyword(s):  
Automotive Industry ◽  
Parametric Design ◽  
Curvature Variation ◽  
Different Characteristics ◽  
Generation Procedure

This paper presents a method to generate an aesthetic surface which is represented by two guide curves and a curve-ruler. A curve-ruler is an expression of a ruler whose curvature variation is monotone and aesthetic, and it is a mathematical version of the actual ruler used in the automotive industry. A ruler-surface is a surface which is a locus of the curve-ruler moving along two guide curves. First, a generation procedure of a guide curve and conditions for producing an aesthetic surface are described. Then, a ruler-surface is formulated parametrically according to the movement of the ruler along two guide curves. Examples of ruler-surfaces show that this method can generate surfaces with different characteristics by various kinds of curve-rulers. Modeling examples are presented indicating that the method could be a supportive system for designer’s intuitive work.

Surface Analysis of “Class A” Polymer Composite Substrates for the Automotive Industry

2004 ◽  
pp. 521-526
Author(s):  
P.J. Schubel ◽  
L.T. Harper ◽  
T.A. Turner ◽  
N.A. Warrior ◽  
C.D. Rudd ◽  
...  
Keyword(s):  
Surface Analysis ◽  
Polymer Composite ◽  
Automotive Industry ◽  
Class A ◽  
Composite Substrates

Development of a computer-aided fixture design system for lightweight grippers in the automotive industry

2016 ◽  
Vol 6 (3) ◽  
pp. 237 ◽  
Author(s):  
Damien Motte ◽  
Håkan Petersson ◽  
Martin Eriksson ◽  
Robert Bjärnemo
Keyword(s):  
Automotive Industry ◽  
Design System ◽  
Fixture Design ◽  
Computer Aided

Quantifying the Visibility of Surface Distortions in Class “A” Automotive Exterior Body Panels

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
K. D. Fernholz
Keyword(s):  
Automotive Industry ◽  
Human Perception ◽  
Element Model ◽  
Subjective Assessment ◽  
Model Data ◽  
Surface Appearance ◽  
Class A ◽  
Surface Distortion ◽  
Subjective Assessments ◽  
Surface Distortions

Visible distortions in Class “A” automotive surfaces are unacceptable to vehicle customers and therefore are considered to be cosmetic defects. The automotive industry currently relies upon subjective assessment of the severity of these distortions to determine whether a component's surface appearance is acceptable. Given the inherent variability in subjective assessments, however, an objective measurement for assessing the severity of defects would be of great benefit to the industry. The issues that need to be addressed to objectively quantify the severity of one particular type of surface distortion are discussed and a methodology for quantifying the severity of that surface distortion in a way that correlates to human perception is proposed. Experimental and finite element model data supporting the proposed methodology is presented.

scholarly journals A Novel Design of a Microstrip Microwave Power Amplifier for DCS Application using Collector-Feedback Bias

2018 ◽  
Vol 8 (3) ◽  
pp. 1647
Author(s):  
Amine Rachakh ◽  
Larbi El Abdellaoui ◽  
Jamal Zbitou ◽  
Ahmed Errkik ◽  
Abdelali Tajmouati ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Power Amplifier ◽  
Microwave Power ◽  
Design System ◽  
Excellent Performance ◽  
Class A ◽  
Simulation Results ◽  
Microwave Power Amplifier ◽  
Novel Design ◽  
Single Power

This paper presents a 1.80GHz class-A Microwave power amplifier (PA). The proposed power amplifier is designed with single-stage architecture. This power amplifier consists of a bipolar transistor and improved by Collector-Feedback Biasing fed with a single power supply. The aim of this work is to improve the performance of this amplifier by using simple stubs with 50Ω microstrip transmissions lines. The proposed PA is investigated and optimized by utilizing Advanced Design System (ADS) software. The simulation results show that the amplifier achieves a high power gain of 13dB, output power rise up to 21dBm and good impedances matching ;For the input reflection coefficient (S11) is below than - 46.39dB. Regarding the output reflection coefficient (S22) is below than -29.898dB, with an overall size of about 93 x 59mm². By the end; we find that this power amplifier offers an excellent performance for DCS applications.

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