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Viewing 1 to 30 of 15833
2014-11-11
Technical Paper
2014-32-0016
Sei Takahashi, Hideo Nakamura, Makoto Hasegawa
Abstract ISO 26262 (Road vehicles - Functional safety), a functional safety standard for motor vehicles, was published in November 2011. In this standard, hazardous events associated with each item constituting a safety-related system are assessed according to three criteria, namely, Severity, Exposure, and Controllability, thereby determining ASILs (Automotive Safety Integrity Levels) representing safety levels for motor vehicles. Although motorcycles are not included in the scope of application of the current edition of ISO 26262, it is expected that motorcycles will be included in the next revision. However, it is not appropriate to directly apply ASILs to motorcycles. In the first place, the situation of usage in practice presumably differs between motorcycles and motor vehicles. Accordingly, in this research, we attempted to newly define Motorcycle Safety Integrity Levels (MSILs). We demonstrate in this article that it is to reduce the maximum severity in the Correspondence Diagram between Risk and ASIL (CDRA) and to increase the degree of acceptable risks in view of situations specific to motorcycles.
2014-11-11
Technical Paper
2014-32-0022
Federico Giovannini, Niccolò Baldanzini, Marco Pierini
Abstract Powered Two-Wheelers (PTW) control is more complex than any other motorized vehicle control, in particular during emergency events, such as panic braking or last second swerving. For standard PTW, a common cause of accident in these situations is the loss of stability due to braking maneuvers. It is worth noting that for PTW the loss of stability means a high probability of fall, especially while cornering. Accordingly, the aim of this study is to propose a fall detection algorithm for PTW performing maneuvers leading to potential instability. The algorithm is composed of a number of parameters, named RISKi, able to detect potential fall events, critical for PTW safety. This fall detection methodology was developed to alert an advanced riding assistance system in order to produce proper counteractions against the imminent fall. The parameters designed for the fall detection process take into account the vehicle destabilization due to the braking intensity and due to heavy oscillations of the vehicle body and the steering bar.
2014-11-11
Technical Paper
2014-32-0023
Daniele Barbani, Niccolò Baldanzini, Marco Pierini
Abstract In the study of new solutions for motorcycle passive safety, FE models of full-scale crash tests play a strategic role. The most important issue in the development process of FE models is their reliability to reproduce real crash tests. To help the engineering in the validation phase, a sensitivity analysis of a FE model for motorcycle-car crash tests is carried-out. The aim of this study is to investigate the model response subjected to variations of specific input parameters. The DOE is performed generating a list of simulations (each one composed by a unique combination of 8 parameters) through Latin Hypercube Sampling. The outputs monitored are the Head Injury Criterion (HIC) and Neck Injury Criteria (Nij). The analysis of the results is performed using scatter plots and linear regression curves to identify the parameters that have major impact on the outputs and to assess the type of dependency (linear or non-linear).
2014-10-23
WIP Standard
AIR5933
This AIR5933 gives an overview of contemporary technologies to determine the oxygen concentration respectively partial pressure in air. The aerospace application and its special constraints have been emphasized regarding weight, power supply, overall size, reliability and safety, cost and useful life.
2014-10-23
WIP Standard
ARP1199C
This Aerospace Recommended Practice provides technical and application information needed by the designers of aircraft electric systems and support equipment for the selection of overcurrent protective devices. It provides definitions to permit comparisons of various electric circuit protective devices. Included also are recommended procedures for periodic inspection.
2014-10-22
Article
The company unveiled reconfigurable clusters and wireless device charging technologies as part of its second-generation “Tech Truck” at the recent IAA Commercial Vehicles event in Hannover, Germany.
2014-10-22
WIP Standard
ARP4741A
This SAE Aerospace Recommended Practice (ARP) establishes the requirements for the design, manufacture, and qualification of four hydraulic switching valves used in airborne applications. Two are pressure operated, Type IA and IB and two are solenoid/pilot operated, Type IIA and IIB. They are applicable to four pressure classes 3000, 4000, 5000 and 8000 psi. The equipment as designed is intended to be installed in hydraulic systems designed to AS5440 for military applications or ARP4752 and ARP4925 depending on the type of aircraft for commercial applications. Additional or refined requirements shall be contained in the detail (procurement) specification and these shall take precedence over any potentially conflicting requirements of this ARP or documents referenced by this ARP.
2014-10-22
WIP Standard
AS7997A
This specification covers constant displacement hydraulic motors, generally remotely mounted, using hydraulic fluid under pressure as the energy transfer medium for driving various accessories. Hydraulic motors shall be suitable for use in aircraft hydraulic systems conforming to and as defined in MIL-H-5440 and MIL-H-8891 as applicable.
2014-10-21
WIP Standard
AIR825/5B
This Aerospace Information Report provides general information to aircraft designers and engineers, regarding LOX, its properties, its storage and its conversion to gas. Much useful information is included herein for aircraft designers regarding important design considerations for a safe and effective installation to an aircraft. The associated ground support equipment needed to support operations of LOX equipped aircraft is also discussed. It is important to realize that LOX equipped aircraft cannot be supported unless this support infrastructure is also available. A significant part of this document will address the specific advantages, disadvantages and precautions relating to LOX systems. These are important issues that must be considered in deciding which oxygen system to install to the aircraft. Also, many commercial and military aircraft use aeromedical LOX equipment that is mostly portable equipment. Aeromedical LOX equipment is not addressed herein as it is beyond the scope of this document.
2014-10-20
WIP Standard
ARP1821B
This SAE Aerospace Recommended Practice (ARP) includes recommendedground flotation analysis methods for both paved and unpaved airfields. The purpose of this document is to identify the recommended aircraft ground flotation analysis methods that should be used for aircraft landing gear design.
2014-10-16
WIP Standard
AS25050B
This specification covers the chromaticity and transmission requirements of equipment light transmitting ware in the descending order of transmission. It is intended for use in military aircraft lighting.
2014-10-16
WIP Standard
J826/3
This document describes the CAD model data of legs and back hardware available from SAE for the HPM-1 three-dimensional H-point machine. The elements of the CAD model include the feet, lower and thighs as well as headroom probe and t-bar. Also included are datum points and lines, and calibration references. The intended purpose for this information is to provide a CAD reference for design and benchmarking as well as a calibration reference for the physical HPM-1 audits. The content and format of the data files that are available are also described. The actual CAD model files are included with this product and are provided in the following formats: CATIA v4 (without parametrics), CATIA v5 (without parametrics), IGES, and STEP.
2014-10-16
Standard
AIR1169C
The scope of this document is to provide a list of documents of types pertaining to the effects of oxygen on ignition and combustion of materials. Consolidating these references in one place makes it easier to find documents of this type as these references are difficult to locate.
2014-10-16
Standard
AIR505A
The purpose of this Report was to provide guidance to the commercial transport aviation industry in the selection and usage of oxygen equipment for high altitude transport aircraft. This Report reflects the consensus of views of the various parts of the industry contacted. The document is based on sound engineering and physiological principles and research data. The recommendations embodied in this document are applicable to commercial transport aircraft for operations between 8,000 and 40,000 ft. altitude.
2014-10-16
Standard
AS452B
The purpose of this standard is to establish optimum standards for crew demand and pressure-breathing oxygen mask assemblies for use by crew members in civil aircraft. This standard covers both general type and quick-donning type mask assemblies in the following classes: a. Class A, oronasal, demand b. Class B, oronasal, pressure-demand c. Class C, full face, demand d. Class D, full face, pressure-demand
2014-10-13
WIP Standard
ARP5150A
This document describes guidelines, methods and tools used to perform the ongoing safety assessment process for transport airplanes in commercial service (hereafter, airplane). The process described herein is intended to support an overall safety management program. It is associated with showing compliance with the regulations, and also with assuring a company that it meets its own internal standards. The methods outlined herein identify a systematic means, but not the only means, to assess ongoing safety. This document does not address the economic decision-making associated with the safety management process. While this decision-making is an integral part of the safety management process, this document addresses only the ongoing safety assessment process. To put it succinctly, this document addresses the "Is it safe?" part of safety management. It does not address the "How much does it cost?" part of the safety management. This document also does not address any specific organizational structures for accomplishing the safety assessment process.
2014-10-09
Article
Not all hands-free technologies are alike, and poorly designed ones can increase driver distraction. That was one of the findings of an AAA Foundation for Traffic Safety study, the results of which it released Oct. 7.
2014-10-09
WIP Standard
AIR4243A
This document discusses the work done by the U.S. Army Corps of Engineers and the Waterways Experiment Station (WES) in support of SAE A-5 Committee activity on Aerospace Landing Gear Systems. It is an example of how seemingly unrelated disciplines can be combined effectively for the eventual benefit of the overall aircraft systems, where that system includes the total airfield environment in which the aircraft must operate. In summary, this AIR documents the history of aircraft flotation analysis as it involves WES and the SAE.
2014-10-09
WIP Standard
J1698/3
This SAE Recommended Practice defines procedures that may be used to validate that relevant EDR output records conform with the reporting requirements specified in Part 563, Table 1 during the course of FMVSS-208, FMVSS-214 and other applicable vehicle level crash testing.
2014-10-08
WIP Standard
ARP6336
This SAE Aerospace Recommended Practice (ARP) provides technical recommendations for the application, design and development of lighting for Unmanned Aircraft (UA). The recommendations set forth in this document are to aid in the design of UA lighting for the type or size of aircraft and the operation in the National Aerospace System for which the aircraft is intended.
2014-10-07
Magazine
Outlook for autonomous driving includes cloud Connectivity with off-board data and services and among vehicles will be crucial in maintaining safety and security in future autonomous vehicles. The next wave of crash simulation As computing speed has improved and software itself has made significant speed and performance gains with each release, modeling tools are now quick enough to build high-quality, large, high-detail vehicle models in a very efficient manner. SAE 2014 Convergence preview Interest in advanced driver-assistance technologies is surging, with automotive engineers and decision makers at OEMs and suppliers working feverishly on the convenience vs. safety trade-off and other electronics-related challenges. Cooled EGR shows benefits for gasoline engines Exhaust gas recirculation systems now in use on diesel engines are used mainly to meet emissions regulations. In gasoline engines, they are an appealing way to meet ever more stringent fuel-economy standards
2014-10-06
Article
Under a long-term partnership announced Oct. 3, AKKA Technologies Group engineers will work with the company's 3DEXPERIENCE platform to develop the next generation of its autonomously driving Link&Go concept car using Dassault Systèmes applications to ideate, design, simulate, and validate on a single collaborative platform hosted on the Cloud.
2014-10-01
Magazine
Propulsion: Energy Sources Flying on vegetation Avionics/Electronics Avionics heat up, in a good way Unmanned Vehicles Reaching the benchmark in secure unmanned vehicle software Thermal Management Submersion and directed flow cooling technology for military applications RF & Microwave Technology Airborne antenna considerations for C-Band telemetry systems Software-designed system improves wireless test speed and coverage
2014-09-30
WIP Standard
AIR6334
This SAE Aerospace Information Report (AIR) examines the need for and the application of a power train usage metric that can be used to more accurately determine the TBO for helicopter transmissions. It provides a formula for the translation of the recorded torque history into mechanical usage. It provides examples of this process and recommends a way forward. This document of the SAE HM-1 IVHM Committee is not intended as a legal document and does not provide detailed implementation steps, but does address general implementation concerns and potential benefits.
2014-09-30
Technical Paper
2014-01-2422
Raghuram Krishnamurthy, Rani Mukherjee
Abstract Safety compliance has a new set of difficult questions to address due to the usage of COTS, OSS and externally supplied software code in automotive systems. The use of third-party software component is essential to business as it helps in reduction of cost and development cycle. However, there are many technical risks encountered when incorporating Third-Party Software (TPSW) components into safety related software. Moreover, safety systems conforming to new automotive safety standard ISO 26262 are expected to satisfy criteria for co-existence of TPSW with internal safety related software and legacy code. The purpose is to avoid a potential failure that may be triggered by TPSW which in turn may propagate to cause failure in other software partitions. There are several options available to address the above requirements. We should carefully evaluate the TPSW's functionality and pedigree and apply combination of techniques to assist in supporting the intent of ISO 26262. This paper discusses on the issues concerning insertion of third party software code (OEM supplied code, Tier 2 vendor software) into in-house developed ECU software.
2014-09-30
Technical Paper
2014-01-2423
James Chinni, Ryan Hoover
Abstract Full-scale vehicle crash testing is an accurate method to reproduce many real-world crash conditions in a controlled laboratory environment. However, the costs involved in performing full-scale crash tests can be prohibitive for some purposes. Dynamic sled testing is a lower cost and widely used method to obtain multiple, useful data sets for development of frontal crash mitigating technologies, systems and components. Wherever possible, dynamic sled tests should use vehicle-specific deceleration pulses determined from full-scale vehicle crash tests. This paper establishes a dynamic sled test protocol based on data collected from eight full-scale heavy vehicle frontal crash tests. The sled test protocol is intended to be utilized as a basis for building a body of knowledge needed to update heavy vehicle frontal impact test recommended practices. These recommended practices provide direction for the development of frontal crash mitigating technologies, systems and components. Additionally, the performance of some frontal crash occupant protection technologies found in heavy vehicles is evaluated.
2014-09-30
Technical Paper
2014-01-2420
James Chinni, Robert Butler, Shu Yang
Abstract Federal Motor Carrier Safety Requirement (FMCSR) 393.76(h) states that “a motor vehicle manufactured on or after July 1, 1971 and equipped with a sleeper berth must be equipped with a means of preventing ejection of the occupant of the sleeper berth during deceleration of the vehicle.” [1] Furthermore, this standard requires that “the restraint system must be designed, installed and maintained to withstand a minimum total force of 6,000 pounds applied toward the front of the vehicle and parallel to the longitudinal axis of the vehicle.” [1] Today, sleeper berths are equipped with sleeper restraint systems that function to contain the sleeper occupant inside the sleeper berth during reasonably foreseeable crashes. To assess the effectiveness of sleeper restraint systems, computer simulation models of the sleeper cab environment and these restraint systems were developed, with a simulated supine occupant in the sleeper. The model was evaluated using two different rollover crash scenarios.
Viewing 1 to 30 of 15833

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