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Scalable decentralized solution for secure Vehicle-to-Vehicle communication

Tata Elxsi, Ltd.-Sreelakshmi S. Vattaparambil, Rajesh Koduri, Sivaprasad Nandyala, Mithun Manalikandy
  • Technical Paper
  • 2020-01-0724
To be published on 2020-04-14 by SAE International in United States
The automotive industry is set for a rapid transformation in the next few years in terms of communication. The kind of growth the automotive industry is poised for in fields of connected cars is both fascinating and alarming at the same time. The communication devices equipped to the cars and the data exchanges done between vehicle to a vehicle are prone to a lot of cyber-related attacks. The signals that are sent using Vehicular Adhoc Network (VANET) between vehicles can be eavesdropped by the attackers and it may be used for various attacks such as the man in the middle attack, DOS attack and Sybil attack. These attacks can be prevented using the Blockchain technology, where each transaction are logged in a decentralized immutable Blockchain ledger. This provides authenticity and integrity to the signals. But the use of Blockchain Platforms such as Ethereum has various drawbacks like scalability which makes it infeasible for connected car system. In this paper, we propose a solution to address various drawbacks of VANET such as privacy issues and, security…
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Anisotropic Material Damage Model of Randomly Oriented Thermoplastic Composites for Crash Simulation

Honda R&D Co., Ltd.-Seiji Hayashi, Mitsuharu Kan
JSOL Corporation-Kei Saito, Masato Nishi
  • Technical Paper
  • 2020-01-1305
To be published on 2020-04-14 by SAE International in United States
In this research, a material model was developed with orthotropic properties for in-plane damage to support finite element strength analysis of components manufactured from a randomly oriented long-fiber thermoplastic composite. This is a composite material with randomly oriented bundles of carbon fibers that are approximately one inch in length. A macroscopic characteristic of the material is isotropic in in-plane terms, but there are differences in the tension and compression damage characteristics.In consideration of these characteristics, a material model was developed in which the damage progression rate is correlated with thermodynamic force and stress triaxiality. In-plane damage was assumed to be isotropic with respect to the elements. In order to validate this material model, the results from simulation and three-point bending tests of closed-hat-section beams were compared and found to correlate closely.However, in the case of axial compression of a hat-section beam, it was found that although the initial peak load corresponded closely, the peak loads after the second one did not match.As a cause for this, it is conceivable that the damage applied in the…
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Model Predictive Automatic Lane Change Control for Intelligent Vehicles

China-Wu Guangqiang
School of Automotive Engineering, Tongji University, China-Ren Meng, Chen Xunjie, Liu Xuyang
  • Technical Paper
  • 2020-01-5025
To be published on 2020-02-24 by SAE International in United States
As a basic link of driving behavior in urban roads, vehicle lane changing has a significant impact on traffic flow characteristics and traffic safety, and the automation of lane change is also a key issue to be solved in the field of intelligent driving. In this paper, the research on the automatic lane change control for intelligent vehicles is carried out. The main work is to build the overall structure of the vehicle's automatic lane change behavior, of which the planning and tracking are focused. The strategy of Constant Time Headway (CTH) is used in the lane change decision. The lane change trajectory adopts the model of constant velocity offset plus sine function, and the longitudinal displacement is determined by the vehicle speed when changing lanes. Model Predictive Control (MPC) theory is used to track the trajectory, which optimizes tracking accuracy and vehicle stability and constrains the range and rate of change of vehicle speed and steering angle. By using weighted quadratic cost function, linearity matrix inequality constraints and upper and lower bound constraints, the…
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A Real-Time Obstacle-Avoidance Trajectory Planner for On-Road Autonomous Vehicle

School of Automotive Studies, Tongji University, China; Clea-Li Yishan, Xiong Lu, Xu Puhang, Li Zhuoren
School of Automotive Studies, Wuhan Women and Children Medic-Zeng Dequan
  • Technical Paper
  • 2020-01-5018
To be published on 2020-02-24 by SAE International in United States
A real-time obstacle-avoidance trajectory planner for on-road autonomous vehicle is proposed in this paper. A cubic B spline core is parametric to generate path with continuous curvature as well as taking the extreme curvature limited by steer system into account. By sampling the target sets via offsetting along the reference path, lots path sets are produced with same heading. As embedded with collision checker and path evaluator, a path selector could pick out the best one to planning speed profile for coupling trajectory to track. Finally, according to the change of path curvature, the speed profile scheduler addresses the conflict of curvature and deceleration. Referencing to the ISO3888-2:2011, a collision avoidance scenario was design to validate the planner. The test results of ten cycles test illustrate that the planner has high enough real-time performance as mean plan time less than 100ms with success rate about 100%.
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Entry Level Connected Infotainment Unit with Smartphone and Vehicle Integration

Maruti Suzuki India, Ltd.-Soundharya N, Tarun Aggarwal, Ritesh Khandelwal, Satish Pandey, Satish Kumar Pandey, Himanshu Kumar Ojha
  • Technical Paper
  • 2019-28-2434
Published 2019-11-21 by SAE International in United States
As we transition towards Internet of Things (IoT) - humans are connected to each other & outside world through the smartphone.Customers tend to use smartphones for varied purposes ranging from communication to entertainment. However, the concern of distraction exists due to poor visibility & accessibility of the phone’s screen in driving condition.One of the repercussion of being connected to smartphone particularly in driving condition includes higher number of road accidents due to distraction. This paper explains one of the key initiatives taken by Maruti Suzuki India Limited to address the same. This is done by offering an entry level connected infotainment system which comprises of the following three components:(a) An entry-level infotainment with basic display & vehicle connectivity, (b) A Dock mounted on infotainment panel enabling safe usage of smartphone due to its position i.e. accessibly and visibility in driving condition, (c) A Driving App specifically designed for driving usage where one can access calling, messaging, navigation on the go with a vibrant UI & easy to use gestures.The infotainment unit is connected to vehicle’s…
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Researchers Turn off Backscattering, Aim to Improve Optical Data Transmission

  • Magazine Article
  • TBMG-35472
Published 2019-11-01 by Tech Briefs Media Group in United States

Engineers at the University of Illinois have found a way to redirect misfit light waves to reduce energy loss during optical data transmission. In a study, researchers exploited an interaction between light and sound waves to suppress the scattering of light from material defects — which could lead to improved fiber optic communication.

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A “STEP” Forward for Product Lifecycle Management

Aerospace & Defense Technology: October 2019

  • Magazine Article
  • 19AERP10_02
Published 2019-10-01 by SAE International in United States

The existence of countless proprietary file formats and the exchange of 3D CAD data has been a significant problem since the beginning of 3D CAD modeling. CAD applications and methods using digital data are constantly changing, which predicates the need for a solution to share validated and accurately translated data. Thus the birth of STEP242.

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Design Approach for Secure Networks to Introduce Data Analytics within the Aircraft Cabin

Hamburg University of Technology-Hartmut Hintze, Fabian Giertzsch, Ralf God
Published 2019-09-16 by SAE International in United States
In the past, aircraft network design did not demand for information security considerations. The aircraft systems were simple, obscure, proprietary and, most importantly for security, the systems have been either physically isolated or they have been connected by directed communication links. The union of the aircraft systems thus formed a federated network. These properties are in sharp contrast with today’s system designs, which rest upon platform-based solutions with shared resources being interconnected by a massively meshed and shared communication network. The resulting connectivity and the high number of interfaces require an in-depth security analysis as the systems also provide functions that are required for the safe operation of the aircraft. This network design evolution, however, resulted in an iterative and continuous adaption of existing network solutions as these have not been developed from scratch. Now, with the upcoming trend of data analytics and artificial intelligence applications, which demand for an extensive availability of data, holistic aircraft cabin networks are necessary to satisfy the associated requirements. For the development of such networks this paper proposes a…
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Laser-Pointing System Transmits Data from Tiny Satellites

  • Magazine Article
  • TBMG-35154
Published 2019-09-01 by Tech Briefs Media Group in United States

Since 1998, almost 2,000 shoebox-sized satellites known as CubeSats have been launched into space. Due to their small frame and the fact that they can be made from off-the-shelf parts, CubeSats are significantly more affordable to build and launch than traditional satellites that cost hundreds of millions of dollars.

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Terms, Definitions, and Acronyms Counterfeit Materiel or Electrical, Electronic, and Electromechanical Parts

G-19T Terms and Definitions
  • Aerospace Standard
  • AIR6273
  • Current
Published 2019-07-30 by SAE International in United States
The SAE Aerospace Information Report (AIR) provides standardized terms, definitions, and acronyms that may be used in the G-19 and G-21 documents, unless otherwise specified in those documents. The SAE International series of documents that address the mitigation of suspect and counterfeit parts will reference this document in their respective Applicable Documents sections. This AIR is for use by organizations that procure and/or use materiel or EEE parts. The terms and definitions of this AIR are intended to be used in conjunction with other G-19 and G-21 standards.
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