Integrative Design | ScienceGate

Abstract A control framework and integrative design method for an adaptive wind turbine blade is presented. The blade is adapted by actively transforming the twist angle distribution (TAD) along the blade. This can alleviate fatigue loads and improve wind capture. In this paper, we focus on wind capture. The proposed design concept consists of a rigid spar that is surrounded by a series of flexible blade sections. Each section has two zones of stiffness. The sections are actuated at each end to deform the TAD. A quasi-static control technique is proposed for the TAD. The controller sets the position of the blade actuators that shape the TAD during steady-state operation. A design procedure is used to define the required TAD as a function of the wind speed. This is based on an optimization procedure that minimizes the deviation between the actual TAD and that found in the aerodynamic design. The design inputs for this optimization problem include the stiffness for each zone of the section, and the actuator locations along the blade. Given the optimal TAD at each wind speed, the free position of the blade is established using a dynamic programming technique. The position is selected based on minimal actuation energy according to wind conditions at any installation site. The proposed framework is demonstrated using a National Renewable Energy Laboratory (NREL) certified wind turbine model with recorded wind data. An increase in efficiency of 3.8% with only a deviation of 0.34% from the aerodynamic TAD is observed.

Download Full-text

Integrative Design of Product Architecture and Assembly Process Plan

Volume 4: 24th Design for Manufacturing and the Life Cycle Conference; 13th International Conference on Micro- and Nanosystems ◽

10.1115/detc2019-97338 ◽

2019 ◽

Author(s):

Masato Toi ◽

Kana Sawai ◽

Masahide Kobayashi ◽

Yutaka Nomaguchi ◽

Kikuo Fujita

Keyword(s):

Product Design ◽

Design Method ◽

Product Architecture ◽

Assembly Process ◽

Air Conditioner ◽

Assembly Sequence ◽

Process Plan ◽

Modeling And Analysis ◽

Analysis Scheme ◽

Integrative Design

Abstract This paper proposes an integrative design method of product architecture and assembly process plan by introducing a matrix-based modeling and analysis scheme. Design structure matrix (DSM) has been used to analyze and design the conceptual structure of product architecture. An assembly sequence diagram, such as a fishbone diagram, has been used as a representation scheme of the assembly process in the design-for-assembly (DFA) framework. The method of this paper is composed of a DSM-based procedure for generating an assembly sequence plan and its integration with a DSM-based design method of product architecture. In this paper, after general meanings of integration in product design are reviewed, the overall method for integration and mathematical procedure for optimizing an assembly sequence plan by compromising with components modularity are described. The procedure for generating an assembly sequence plan is demonstrated with an example of a desktop stapler, and the integrative design is demonstrated with a case study of air-conditioner units. This paper concludes with some discussion on the role of the proposed framework toward the integrity of product design.

Download Full-text

Optical-Mechanical-Electrical Integrative Design of Fiber Optic Gyro/Beidou/Odometer Integrated Navigation System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.644-650.1346 ◽

2014 ◽

Vol 644-650 ◽

pp. 1346-1350

Author(s):

Xiao Yue Zhang ◽

Xiao Jing Yi ◽

Chun Xi Zhang

Keyword(s):

System Design ◽

Navigation System ◽

Fiber Optic ◽

Design Method ◽

System Structure ◽

Integrated Navigation ◽

Fiber Optic Gyro ◽

Integrated Navigation System ◽

Vehicle Test ◽

Integrative Design

To improve the reliability, real-time performance and maintainability of navigation system, an optical-mechanical-electrical integrative design method of the fiber optic gyro inertial navigation /beidou/odometer integrated navigation system is proposed. Based on the basic working principle of the integrated navigation system, design of system structure and signal connection are implemented. In the integrated navigation system, all-fixed-structure, instrument and system integrative design and modularization design are used. At last, the integrated navigation system is developed, north seeking test and vehicle test are carried out to demonstrate the validity of the referred system design.

Download Full-text

Beyond Life Cycle Assessment, an Integrative Design for Environment Approach for the Automotive Industry

10.4271/982228 ◽

1998 ◽

Author(s):

Kai Hockerts ◽

Stephanie Adda ◽

Helene Teulon ◽

David Dowdell ◽

Neil Kirkpatrick ◽

...

Keyword(s):

Life Cycle Assessment ◽

Life Cycle ◽

Automotive Industry ◽

Design For Environment ◽

Integrative Design

Download Full-text