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Parametric Modelling and High Fidelity Algorithms for Vehicle Weight Estimation for Optimized Concept Vehicle Architecture

Mahindra & Mahindra, Ltd.-Rathish Chandar Kanthallu, Nagaraju Kata, Samir Rawte, Lakshmanprasad Murugesan, Jeyevijeyan Ramakrishnan Sheerkazhi, Yuvaraj Duraiswamy
  • Technical Paper
  • 2019-28-0036
To be published on 2019-10-11 by SAE International in United States
PARAMETRIC MODELLING & HIGH FIDELITY ALGORITHMS FOR VEHICLE WEIGHT ESTIMATION FOR OPTIMIZED CONCEPT VEHICLE ARCHITECTURE The conceptualization phase of vehicle development focuses on the architecture definition and optimization based on different constraints/requirements. With the focus on Sustainability, the architecture optimization process must include "Light-weighting" as an optimization criterion. With only concept vehicle architecture available, the vehicle weight estimation becomes judgmental & inaccurate. This paper aims to address this deficiency with a new analytical approach for vehicle weight estimation. The new approach for vehicle weight estimation is a "bottom-up" approach using parametric models for each system weight with the inputs being the relevant vehicle specifications driving the system engineering. For size/shape-driven (rather than functional) systems, the models are content-based & segment-based. The parametric models are then iterated for multiple architecture concepts & specifications and the optimum concept (meeting all functional & business constraints) is chosen. The parametric models are based on extensive benchmarking studies and regression analyses. Both single-parameter & multiple-parameter regressions are used for parametric modelling. The parameters selection is carried out such that the…

Communication Transceivers Qualification Requirements - LIN

Vehicle Architecture For Data Communications Standards
  • Ground Vehicle Standard
  • J2962/1_201907
  • Current
Published 2019-07-18 by SAE International in United States

This document covers the requirements for transceiver qualification. Requirements stated in this document will provide a minimum standard level of performance for the LIN transceiver block in the IC to which all compatible transceivers shall be designed. No other features in the IC are tested or qualified as part of this recommended practice. This will assure robust serial data communication among all connected devices regardless of supplier.


Communication Transceivers Qualification Requirements - CAN

Vehicle Architecture For Data Communications Standards
  • Ground Vehicle Standard
  • J2962/2_201907
  • Current
Published 2019-07-18 by SAE International in United States

This document covers the requirements for transceiver qualification. Requirements stated in this document will provide a minimum standard level of performance for the CAN transceiver in the IC to which all compatible transceivers shall be designed. No other features in the IC are tested or qualified as part of this recommended practice. This will assure robust serial data communication among all connected devices, regardless of supplier.


Dedicated Short Range Communications (DSRC) Performance Requirements for V2V Safety Awareness™ Set

V2X Vehicular Applications Technical Committee
  • Ground Vehicle Standard
  • J2945/2S_201907
  • Current
Published 2019-07-01 by SAE International in United States

This Abstract Syntax Notation (ASN.1) File is the precise source code used for SAE International Standard J2945/2. As part of an international treaty, all US ITS standards are expressed in "ASN.1 syntax". ASN.1 Syntax is used to define the messages or "ASN specifications". Using the ASN.1 specification, a compiler tool produces the ASN library which will then be used to produce encodings (The J2945/2 message set uses UPER encoding). The library is a set of many separate files that collectively implement the encoding and decoding of the standard. The library is then used by any application (along with the additional logic of that application) to manage the messages. The chosen ASN tool is used to produce a new copy of the library when changes are made, and it is then linked to the final application being developed. The ASN library manages many of the details associated with ASN syntax, allowing for subtle manipulation to make the best advantage of the encoding style.


The FACE™ of Military Modernization

  • Magazine Article
  • TBMG-34528
Published 2019-06-01 by Tech Briefs Media Group in United States

U.S. rival countries have been rapidly modernizing their militaries, with publicized advances that pose credible challenges to U.S. supremacy in all aspects of warfare: air, land, sea, space and cyberspace. On January 19, 2018 Secretary Mattis discussed the National Defense Strategy and emphasized the need to modernize key capabilities to address these threats. He stated: “To keep pace with our times, the department will transition to a culture of performance and affordability that operates at the speed of relevance. Success does not go to the country that develops a new technology first, but rather, to the one that better integrates it and more swiftly adapts its way of fighting. Our current bureaucratic processes are insufficiently responsive to the department's needs for new equipment. We will prioritize speed of delivery, continuous adaptation and frequent modular upgrades.”


Human Systems Integration and SAE6906

  • Professional Development
  • C1941
Published 2019-05-20

By attending this seminar, you will be able to:


Modeling and Validation of a Transmission E-Pump for Application in Hybrid Vehicles

Ford Motor Company-Kaushik Kannan, Gangarjun Veeramurthy, Mark Yamazaki
Published 2019-04-02 by SAE International in United States
The Electric Pump (E-Pump) is a critical component in the hybrid transmission system. The E-Pump provides flow to maintain a stable line pressure when the engine is in an off state. The main applications of the E-Pump are Park Pawl engagement and disengagement, engine start-stop operation and shadow shifting. A Systems Engineering Approach was followed to develop a medium fidelity plant model for the E-Pump. The developed model was initially tested and validated in the Model in-the loop (MIL) environment. After initial validation, the model was integrated into the overall vehicle model which was then tested on the Software in-the loop (SIL) and Hardware in-the loop (HIL) environments. The model was validated across different platforms and several operating conditions. The basic applications of the E-Pump such as park pawl actuation, engine starting and shadow shifting were validated. The model was later validated using the data, which was acquired on a prototype vehicle run on a dynamometer. The goal was to develop a common model, which could be used across different simulation platforms such as MIL,…
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An Efficient Trivial Principal Component Regression (TPCR)

General Motors LLC-Balakrishna Chinta
Published 2019-04-02 by SAE International in United States
Understanding a system behavior involves developing an accurate relationship between the explanatory (predictive) variables and the output response. When the observed data is ill-conditioned with potential collinear correlations among the measured variables, some of the statistical methods such as least squared method (LSM) fail to generate good predictive models. In those situations, other methods like Principal Component Regression (PCR) are generally applicable. Additionally, the PCR reduces the dimensionality of the system by making use of covariance relationship among the variables. In this paper, an improved regression method over PCR is proposed, which is based on the Trivial Principal Components (TPC). The TPC regression (TPCR) makes use of the covariance of the output response and predictive variables while extracting principal components. A new method of selecting potential principal components for variable reduction in TPCR is also proposed and validated. Two example problems, which are highly collinear, were considered for illustration. Results are also compared with the Partial Least Squares Regression (PLS1), which is another widely used statistical method, for ill-conditioned data analysis. From these results, it…
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Integrating SOTIF and Agile Systems Engineering

Ford Motor Co., Ltd.-Kyle Post, Christopher K. Davey
Published 2019-04-02 by SAE International in United States
Autonomous vehicles and advanced driver assistance systems have functionality realized across numerous distributed systems that interact with a dynamic cyber-physical environment. This complexity raises the potential for emergent behaviours which are not intended for the system’s operational use. The need to analyze the intended functionality of these emergent behaviours for potential hazards, which may occur in absence of faults, are aspects of the ISO PAS 21448, Safety of the Intended Functionality (SOTIF) [1]. The Safety of the Intended Functionality or SOTIF is a framework for developing systems which are free from unreasonable risk due to the intended functionality or performance limitations of a system which is free from faults. This is meant to complement Functional Safety which is covered in ISO 26262 [2]. The major focus of SOTIF is to aid in the functional development of a system. The major areas are focused on analyzing the system as specified, verify that any known hazardous scenarios meet the expected behaviour, identify any hazardous scenarios which were previously not known, and iterate the functional design accordingly.This paper…
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Automated Assessment of E/E-Architecture Variants Using an Integrated Model- and Simulation-Based Approach

Karlsruhe Institute of Technology (KIT)-Harald Bucher, Kevin Neubauer, Jürgen Becker
Published 2019-04-02 by SAE International in United States
Due to the continuously increasing complexity of automotive electric/electronic architectures (EEAs), model-based systems engineering principles became state-of-the-art for designing such heterogeneous systems. However, current Architecture Description Languages (ADLs) as well as their system-design and analysis tools and frameworks for simulation-based analysis of EEA models often are not fully integrated in a single design process. They usually require error-prone import/export processes, especially when considering distributed collaboration, from EEA data models to external analysis frameworks and vice versa. Particularly, this limits the efficient assessment and comparison of distinct architecture variants regarding certain non-functional properties. Moreover, simulation-based analysis of the latter intended for EEA assessments in early concept phases demands backtracking capabilities to allow iterative model adaptations.In this paper, a novel approach for evaluating EEAs dynamically regarding several metrics and comparing their architecture variants is presented. A generic concept to integrate actor-oriented simulation and analysis tools into EEA system-design tools is shown, based on a previously developed approach to synthesize and execute a cross-domain simulation model derived from static EEA descriptions designed in PREEvision. Additionally, the concept comprises…
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