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Viewing 1 to 30 of 16671
2016-09-27
Technical Paper
2016-01-8114
Massimiliano Ruggeri, pietro marani, Michele selvatici
Stationary brake is a very important and safety related function in many machine types. The new transmissions and the X-by wire systems increase the role of stationary brake criticality, as it is also an emergency brake, and it’s often used to hold the vehicle while the transmission is not locking the wheel in all stationary condition and sometimes if it is faulty. As an example, dual clutch and power-shift transmission gear systems, as well as hydrostatic transmissions are often unable to hold the vehicle stopped and the function is provided by the stationary brake. Due to the main need of having the brake actuated when vehicle is stopped, without any hydraulic and electric active power source, the brake configuration is normally a “negative” configuration, but this obviously lead to the brake actuation when de-energized, even in case of fault occurrence.
2016-09-27
Technical Paper
2016-01-8098
Satish jaju, Sahil Pandare
The regulatory requirement in Economic Commission for Europe (ECE R58) regulation applies to the Rear underrun protection devices which are intended to be fitted to commercial vehicles of N categories. The purpose of this regulation is to offer effective protection against underrunning of vehicles. This paper describes Computer aided engineering (CAE) methodology for testing rear underrun protection devices with loading sequences to be decided by Original equipment manufacturer. A sample model is prepared and analyzed to represent actual test conditions. Constraints and boundary conditions are applied as per test of vehicle. Finite element simulation is carried out using LS DYNA solver. Structural strength and integrity of Rear under protection device assembly is observed for different regulatory load requirement.
2016-09-27
Technical Paper
2016-01-8011
Kevin Grove, Jon Atwood, Myra Blanco, Andrew Krum, Richard Hanowski
The goal of this research was to investigate the reliability of tractor-trailer collision avoidance systems (CASs) and characterize the activations observed in the real world. 150 commercial tractor-trailers were equipped with a data acquisition system (DAS) for up to one year. The DAS recorded video of the roadway, video of the driver and vehicle data whenever the truck was driving. Data was collected between November 2013 and August 2015, and the trucks in the study were equipped with either the Meritor WABCO OnGuardTM or Bendix® Wingman® AdvancedTM products. Seven companies from across the United States participated in the study, and all participating vehicles drove their normal, revenue-producing routes. The study evaluated reliability by classifying activations into three categories, based on whether a valid object was being tracked and whether the driver need to react immediately to the activation.
2016-09-27
Technical Paper
2016-01-8155
Devaraj Dasarathan, Jonathan Jilesen, David Croteau, Ray Ayala
Side window clarity and its effect on side mirror visibility plays major role in the driver comfort. Driving in inclement weather conditions such as rain can be stressful. Having optimal visibility under these conditions is ideal. However, extreme conditions can overwhelm exterior water management devices, resulting in rivulets of water flowing over the a-pillar and onto the vehicle’s side glass. Once on the side glass, these rivulets and the pooling of water they feed can significantly impair the driver’s ability to see the side mirror or to see outwardly when in situations such as changing lanes. Designing exterior water management features of a vehicle is a challenging exercise as traditionally, physical testing methods first require a full-scale vehicle for evaluations to be possible. Additionally, common water management devices such as grooves and channels often have undesirable aesthetic, drag, and wind noise implications.
2016-09-20
Technical Paper
2016-01-2025
Amir Fazeli, Adnan Cepic, Susanne Reber
Aircraft weight and center of mass are two critical design and operational parameters that have to be within a design envelope to ensure a safe and efficient operation of aircraft. Previous efforts to accurately determine aircraft weight and center of mass before takeoff using landing gear shock strut pressures have failed due to the distortion of measured pressures by shock strut seal friction. Currently, aircraft loading process is controlled with loading sheets and passenger/cargo weight estimation as there are no online measurement systems that can accurately and efficiently estimate aircraft weight and determine the center of mass location before takeoff. However, errors in loading sheets, shifting cargo and errors in weight estimation could lead to incorrect loading of aircraft and, consequently, increase the risk of accidents, particularly in cargo flights.
2016-09-20
Technical Paper
2016-01-1976
Kiran Thupakula, Adishesha Sivaramasastry, Srikanth Gampa
Aviation safety is one of the key focus areas of the aerospace industry as it involves safety of passengers, crew, assets etc. Due to advancements in technology, aviation safety has reached to safest levels compared to last few decades. In spite of declining trends in in-air accident rate, ground accidents are increasing due to ever increasing air traffic and human factors in the airport. Majority of the accidents occur during initial and final phases of the flight. Rapid increase in air traffic would pose challenge in ensuring safety and best utilization of Airports, Airspace and assets. In current scenario multiple systems like Runway Debris Monitoring System, Runway Incursion Detection System, Aircraft Strike Alert System in taxiways, Obstacle avoidance system, Traffic Collision Avoidance System are used for collision prediction and alerting in airport environment.
2016-09-20
Technical Paper
2016-01-2040
Satya Swaroop Panda, Uday Kishore Tammiraju
Most of the real world problems pose practical challenges for making decisions primarily due to availability of limited data. Quantification of risk and assessment of structural reliability becomes difficult in such scenarios. Techniques for performing safety analysis for such problems are discussed in this paper. While complete characterization of a system behaviour may be difficult with limited data of its response, statistical models based on extreme value theory provide the basis for making decisions with reasonable confidence. The same may not be true, however, for such structures early in their design cycle, due to limited experience of their performance. In such cases response surface methodology can be very useful in determination of risk and suitably making modifications to the design to improve the reliability of the component or system. Applications of these methods for some real world scenarios are demonstrated discussed.
2016-09-18
Technical Paper
2016-01-1953
Michael Herbert Putz, Harald Seifert, Maximilian Zach, Jure Peternel
Vienna Engineering (VE) is working since more than eight years on an electro-mechanical brake (EMB) with a special eccentric and highly non-linear actuation mechanism. The principle allows e.g. high brake torque in approx. 50 milliseconds with only approx. 3 A rms actuator current at 12 V. This EMB reached an elaborated state and versions for passenger cars, elevators, railway and commercial vehicles (CVs) were derived. Now, as the EMB is going to road tests, it is necessary to closely fulfill safety requirements. What these safety requirements are and how they can be fulfilled is discussed in this paper: That are properties of the overall system and of the mechanics and electronics of the single brake. The overall brake system for EMBs needs a truly redundant power supply, a safe control bus and a safe brake pedal. The mechanics of a single brake can be required to release when power is off and it must not get mechanically stuck.
2016-09-16
Technical Paper
2016-01-9017
Dr Janka Cafolla, Derick Smart, Barry Warner
The lifting and excavating industry are not as advanced as automotive in the use of modern CAE tools in the early stages of design and development of heavy machinery. There is still a lack of confidence in the integrity of the results from FE simulations and optimisation and this becomes a barrier to the adoption of virtual prototyping for vehicle verification. R&D of Tata Steel has performed tests on two forklift truck overhead guards supplied by a major manufacturer. Based on the international standard for Falling Object Protective Structures (FOPS) as an initial input to the method of testing, the main aim of this study was to generate as much test data as possible to correlate the Finite Element (FE) simulations of two tests - a static and a dynamic test. The static test was developed to deform the overhead guard plastically in a slow controlled manner, so it would be easier to correlate the measured data to FE simulation.
2016-09-14
Technical Paper
2016-01-1877
Jun Hu, Wei Liu, Shuai Cheng, Huan Tian, Huai Yuan, Hong Zhao
The convolutional neural network (CNN) has achieved extraordinary performance in image classification. However, the implementation of such architecture on embedded platforms is a big challenge task due to the computing resource constraint issue. This paper concentrates on optimization of CNN on embedded platforms with a case study of pedestrian detection in ADAS. The main contribution of this proposed CNN is its ability to run pedestrian classification task in real time with high accuracy based on a platform with ARM embedded. The CNN model has been trained with GPU locally and then transformed into an efficient implementation on embedded platforms. The efficient implementation uses dramatically small network scale and a lightweight CNN is obtained. Specifically, parameters of the network are compressed by adopting integer weights to reduce computational complexity. Meanwhile, other optimizations have also been proposed to adapt the general ARM processor architecture.
2016-07-22
WIP Standard
AS100026B
No scope available
2016-07-22
Book
2016-07-12
WIP Standard
AMS1428/2
The foundation specification (AMS1428) and the category specifications (AMS1428/1 and AMS1428/2) cover deicing/anti- icing materials in the form of a fluid. 1.1.1 Foundation and Category Specifications The foundation specification establishes the requirements for all Type I deicing/anti-icing fluids and defines the terms Glycol (Conventional and Non-Conventional) and Non-Glycol and contains technical and other requirements that apply to both Glycol (Conventional and Non-Conventional) and Non-Glycol based fluids. The category specification AMS1428/1 covers Glycol (Conventional and Non-Conventional) based fluids whereas the category specification AMS1428/2 covers Non-Glycol based fluids. 1.2 Other Scope Requirements Other Scope requirements are set in AMS1428.
2016-07-12
WIP Standard
AMS1428/1
1.1 Form The foundation specification (AMS1424M) and the category specifications (AMS1424/1 and AMS1424/2) cover deicing/anti-icing materials in the form of a fluid. 1.1.1 Foundation and Category Specifications The foundation specification establishes the requirements for all Type I deicing/anti-icing fluids and defines the terms Glycol (Conventional and Non-Conventional) and Non-Glycol and contains technical and other requirements that apply to both Glycol (Conventional and Non-Conventional) and Non-Glycol based fluids. The category specification AMS1424/1 covers Glycol (Conventional and Non-Conventional) based fluids whereas the category specification AMS1424/2 covers Non-Glycol based fluids. 1.2 Other Scope Requirements Other Scope requirements are set in AMS1424M.
2016-07-12
Standard
J2365_201607
This Recommended Practice can apply to both Original Equipment Manufacturer and Aftermarket route-guidance and navigation system functions for passenger vehicles. The methods apply only to the presentation of visual information and the use of manual control inputs to accomplish a navigation or route guidance task. They do not apply to visual monitoring tasks which do not require a manual control input, such as route following. Voice-activated controls or passenger operation of controls are also excluded.
2016-07-12
Standard
J2052_201607
This methodology can be used for all calculations of HIC, with all test devices having an upper neck triaxial load cell mounted rigidly to the head, and head triaxial accelerometers.
2016-07-12
Standard
AIR6237
The scope of this document is to provide review of recent history of loss-of-control accidents during airline revenue operations.
2016-07-06
WIP Standard
J1674
The purpose of this SAE Standard is to offer simplified and prioritized guidelines for collecting and preserving on-scene data related to motor vehicle accidents. It is intended that these guidelines improve the effectiveness of data collection, which will assist subsequent analysis and reconstruction of a particular incident. The document is to guide early data collectors whose objectives include documenting information related to the incident. it may be used by law enforcement personnel, safety officials, insurance adjusters and other interested parties. The document identifies categories of scene physical features that deteriorate relatively quickly and recomends documentation task priorities. Detailed methods of collecting data are not part of this document. However, some widely used methods are described in the references in Seciton 2.
2016-07-06
WIP Standard
J224
The purpose and scope of this SAE Recommended Practice is to provide a basis for classification of the extent of vehicle deformation caused by vehicle accidents on the highway. It is necessary to classify collision contact deformation (as opposed to induced deformation) so that the accident deformation may be segregated into rather narrow limits. Studies of collision deformation can then be performed on one or many data banks with assurance that the data under study are of essentially the same type. The seven-character code is also an expression useful to persons engaged in automobile safety, to describe appropriately a field-damaged vehicle with conciseness in their oral and written communications. Although this classification system was established primarily for use by professional teams investigating accidents in depth, other groups may also find it useful.
2016-06-30
WIP Standard
AS6554A
The purpose of this SAE Aerospace Standard (AS) is to standardize the basic design, performance and testing requirements for “Cargo Stoppers” cargo tie-down accessories to be used in conjunction with approved tie-down straps meeting AS5385C (TSO C-172) requirements.
2016-06-30
Standard
J3069_201606
This SAE Recommended Practice provides test procedures, performance requirements, and design guidelines for adaptive driving beam (ADB) and associated equipment.
2016-06-28
WIP Standard
J1698/1
This Recommended Practice provides common data output formats and definitions for a variety of data elements that may be useful for analyzing vehicle crash and crash-like events that meet specified trigger criteria. The document is intended to govern data element definitions and EDR record format as applicable for light-duty motor vehicle Original Equipment applications.
2016-06-28
Standard
J2878_201606
This procedure establishes a recommended practice for performing a Low Speed Thorax Impact Test to the Hybrid III Small Female Anthropomorphic Test Device (ATD or crash dummy). This test was created to satisfy the demand by the industry to have a certification test which results in peak chest deflection similar to current full vehicle, frontal impact tests. An inherent problem exists with the current certification procedure because the normal (6.7 m/s) thorax impact test has test results for peak chest deflection that are greater than those currently seen in full vehicle, frontal tests. The intent of this document is to develop a low speed thorax certification procedure for the H-III5F dummy with a 3.0 m/s impact similar to the SAE J2779 procedure for the H-III50M dummy.
2016-06-27
WIP Standard
AIR6319
This document describes how the program achieves its objective: to educate and train currently qualified commercial pilots with multi-engine and instrument ratings for First Officer and eventually Captain positions with the regional and/or the major airlines. This document provides an overview of a selection process, an academic curriculum, and a flight training program which will develop industry-recognized competencies and instill the knowledge, skills and attitudes known as professional standards.
2016-06-24
WIP Standard
J3123
Develop a test procedure to measure the simulated sag/creep of fuel tanks for gasoline hybrid vehicles where the tank pressure is controlled in a range from -150 to +380 mbar by a Fuel Tank Isolation Valve (FTIV) that represents 15 year and 150,000 mile lifetime.
Viewing 1 to 30 of 16671

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