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SAE International Journal of Passenger Cars Electronic and Electrical Systems
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Design Optimization of Airline Seats

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Aalborg University, Denmark-John Rasmussen, Mark de Zee
  • Journal Article
  • 2008-01-1863
Published 2008-06-17 by SAE International in United States
This paper investigates the opportunity to optimize the parameters of an airline seat for maximum comfort within the confined space available in coach class. A computational model is subjected to a systematic variation of its parameters leading to identification of optimal movement patterns between the seat pan and backrest in terms of discomfort from muscle fatigue and shear forces.The paper concludes that such patterns exist but other factors may have to be included before the results are brought to practical use in airline seat design.
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Crimp Analysis Simulation Technology

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Yazaki Parts Co., Ltd.-Naoki Kakuta
  • Journal Article
  • 2008-01-1271
Published 2008-04-14 by SAE International in United States
Crimping is a fundamental technology that is widely used as a method to permanently connect a terminal and wire in the automotive wiring harness industry. The crimping process involves large deformations (that exhibit strong non-linear behavior) to create multiple contact points between the terminal and wire strands. This paper discusses analysis done with a finite element simulation technology specially developed for crimping, the usefulness of the analysis simulation, and future issues and prospects of this technology.
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Optimization of All-around View Image Quality and Camera Calibration Method

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Nissan Motor Co., Ltd.-Satoshi Chinomi, Masayasu Suzuki, Teruhisa Takano
  • Journal Article
  • 2008-01-0665
Published 2008-04-14 by SAE International in United States
This paper describes the methods adopted to improve the image quality of the all-around view system. This system uses multiple vehicle-mounted cameras to capture images of the circumstances around the vehicle. The images undergo viewpoint transformation and are synthesized to create a single image seen from a virtual perspective overhead. The specific methods discussed here concern optimization of the design parameters for the camera orientation and a camera calibration method that does not involve physical movement of the cameras.
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Tuned Silencer Using Adaptive Variable Volume Resonator

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

The Ohio State University-Chengwu Duan
  • Journal Article
  • 2008-01-0896
Published 2008-04-14 by SAE International in United States
In this study, an adaptive control mechanism is proposed to design a silencer applying variable volume resonator concept. Transfer matrix method is used to calculate the transmission loss and evaluate acoustic performance of the proposed mechanism. Effects of damping factor, area ratio of expansion chambers are examined first for a fixed double chamber resonator. Then a two-dimensional search scheme is developed to find optimal piston position that achieves maximum transmission loss with minimal effort. This study shows that the proposed adaptive silencer can efficiently attenuate noise when comparing with a conventional fixed resonator.
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Workflow and Asset Management Challenges in a Distributed Organization

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Oakland University-Subra Ganesan
Six Sigma Black Belt-Beena Anand
  • Journal Article
  • 2008-01-1279
Published 2008-04-14 by SAE International in United States
Increasingly Automotive OEMs and their suppliers find themselves spread across different continents. This in turn gives rise to knowledge, physical assets and key decision makers also being spread across the globe. This poses significant challenges for the companies to effectively manage and keep track of their resources. It is also challenging to work with teams spread across globe and for the team to arrive at intelligent decisions quickly and efficiently. In last few years we have spent significant amount of person hours trying to create systems and Software to help manage Workflow and Assets spread across diverse Geographic and Political areas. This paper intends to discuss some of the key factors involved such as: Keeping Track of Assets in a diverse and distributed OrganizationControlling the movement of AssetsImplementing workflow Software for change management in a distributed OrganizationUsing workflow Software to manage/approve the movement of AssetsChallenges in implementing common Workflow and Asset Management Solution in a global Organization Technology/Infrastructure ChallengesSecurity ChallengesOrganization Silos/barriersCultural ChallengesLanguage Barriers
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Optimum Design of a Steer by Wire System using Systematic System Engineering Approach

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Advanced Vehicle Electronics, Honeywell-Manaswini Rath, Morrel Kelly, Kurt Kober, Anand Gulati
  • Journal Article
  • 2008-01-1452
Published 2008-04-14 by SAE International in United States
A systematic system engineering methodology to design and analyze a Steer by Wire (SBW) system optimizes the system performance. The proposed system engineering approach along with dynamic system analysis leads to a robust, reliable and efficient SBW system design. This approach assures a concrete definition by considering possible use cases, regulatory restrictions, user's expectation and constraints from stake holders. The further decomposition of definitions to design and analysis is derived from all these inputs. Performance of the system is evaluated by defining measure of effectiveness and use cases. The dynamic analysis is performed using SysML methodology.
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An Introduction to MISRA C++

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

LDRA Limited-Chris Tapp
  • Journal Article
  • 2008-01-0664
Published 2008-04-14 by SAE International in United States
The inexorable expansion of software in the automotive sector has led to a rapid expansion in the number of programming languages used in system development. C++ is one such language, and, given its wide user base, it is expected to be a major player in future automotive projects.Given the above, MISRA has produced a set of guidelines (called MISRA C++) to assist in using C++ for critical systems. These guidelines are along the lines of those given within MISRA C.This paper explains the background behind MISRA C++, the development process used in its production and shows examples of some of the guidelines.
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Dynamic Characterization of Intelligent Vehicle Systems Theory and Experiment

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

University of Detroit Mercy-M. G. Mehrabi
  • Journal Article
  • 2008-01-0199
Published 2008-04-14 by SAE International in United States
This paper deals with controller design for path tracking control of intelligent vehicle systems. A two degrees of freedom (DOF) model is developed to represent the motion of a vehicle which is used to formulate the path tracking problem of vehicles. By using optimal control theory, the structure of a controller is obtained for vehicles with front and rear steering systems. In designing the controller, a quadratic measure of performance consisting of the integral of the errors (in position and orientation of the vehicle) and the input (front and rear wheel steering angles) are minimized. This controller is implemented to an experimental vehicle and the experimental results of its path following are presented.
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New Sensors to Track Head Acceleration during Possible Injurious Events

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

AFRL/RHPA-Ted Knox, Joseph Pellettiere, Chris Perry, John Plaga
Endevco-Jesse Bonfeld
  • Journal Article
  • 2008-01-2976
Published 2008-12-02 by SAE International in United States
Instrumented earplugs were first introduced in 2000 by the Air Force Research Lab as a means of measuring head accelerations in race car drivers after it was shown that instrumented helmets slipped on the head during impact events. A version of these earplugs was adopted by the Indy Racing League and Championship Auto Race Teams (CART) in 2003. In 2006, Begeman, Melvin, Troxel and Mellor reported that signals from earplugs mounted in cadavers showed a phase shift at 50 and 100 Hz vibration indicating less than perfect coupling with the head. A new miniature tri-axial accelerometer has been developed that is small enough to be placed in the ear canal portion of communication earplugs (earpieces) as a way of improving the coupling and thus the reliability of the recordings from drivers undergoing multi-axial crash events.The first part of the effort involved developing design specifications for the next generation earplugs. These came from Andrew Mellor at the Fédération Internationale de l'Automobile (FIA) Safety Center who developed these specifications with a view toward using the new earplugs…
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Wireless Acceleration and Impact Recording Chips

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Air Force Research Laboratory (AFRL)-Ted Knox, John Plaga
Evigia Systems, Inc.-N. Yazdi, Y. Zhang, R. Hower
  • Journal Article
  • 2008-01-2979
Published 2008-12-02 by SAE International in United States
This paper presents an overview of a new class of wireless acceleration sensor chips being developed by Evigia Systems and Air Force Research Laboratory (AFRL) that can record the magnitude and duration of exposure to external impact without requiring any battery or any other external power source. The combination of the magnitude and duration of the acceleration event provides the information needed for quantification of the impact energy after extracting the recorded data from the sensor array. The light-weight, small form-factor, and wireless link features of these chips enables them to be readily inserted in earplugs, helmets, protective gear, on sections of vehicles. Further, their low cost, make them well suited for the Go-Kart, Sprint Car, Rally and Motocross races where the budgets are lower than IRL or NASCAR.
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