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Standard
2013-04-22
This document outlines the functional and design requirements for baggage/cargo tow tractors used for airline services.
Standard
2013-04-20
The intent of this document is to provide recommended practices for conducting shock absorption testing of civil aircraft landing gear equipped with oleo-pneumatic shock absorbers. The primary focus is for Part 25 aircraft, but differences for Part 23, 27, and 29 aircraft are provided where appropriate.
Standard
2013-04-18
This SAE Standard covers minimum dimensional relationship for sheaves, drums, and wire rope for mobile, construction type lift cranes.
WIP Standard
2013-04-16
This specification covers three types of deicing/anti-icing material, each in the form of a non-Newtonian fluid.
Standard
2013-04-12
This specification covers a butadiene - acrylonitrile (NBR) rubber in the manufacturer of molded seals. These products have been used typically at temperatures from -65 degrees F (-54 degrees C) to +180 degrees F (+182 degrees C) where resistance to fuel is required, but usage is not limited to such applications. Each application should be considered individually.
WIP Standard
2013-04-09
1. To determine the observable and non-observable (from a strictly monitoring viewpoint) methods in which the identified susceptibilities can be tracked and/or managed during or after an event and to record these in a matrix form. This matrix will be circulated to the other SAE groups with expertise in related topics with a request for them to complete. 2. The HM-1 committee will work with FAA, EASA *, ICAO, Industry and others to produce an SAE ARP that will provide details on the applicability of aircraft health monitoring technologies that can be used for assessing the safety, operational and maintenance effects related to volcanic ash incidents. *in particular to take into account the results of the intended EASA Advance Notice of Proposal relative to volcanic ash airworthiness issues
Collection
2013-04-09
The 23 papers in this technical paper collection include topics on system reliability target allocation, interval analysis in robust design, imprecise reliability assessment, and computational algorithms for efficient estimation of reliability, Monte Carlo simulation, Bayesian reliability, Dempster-Shafer Evidence theory, and multi-disciplinary optimization. As well as new technical advances in DFSS and provide valuable insight into its application through the presentation of significant real-world case studies.
Collection
2013-04-09
The 12 papers in this technical paper collection focus on applying various sensors and diagnostics to examine flow and combustion processes in both production engines and research environments. Topics include: pressure sensors, ion probes, exhaust gas composition analyzers, and various optical techniques.
Technical Paper
2013-04-08
Zhen Jiang, Wei Chen, Yan Fu, Ren-Jye Yang
Reliability-based design optimization (RBDO) has been widely used to obtain a reliable design via an existing CAE model considering the variations of input variables. However, most RBDO approaches do not consider the CAE model bias and uncertainty, which may largely affect the reliability assessment of the final design and result in risky design decisions. In this paper, the Gaussian Process Modeling (GPM) approach is applied to statistically correct the model discrepancy which is represented as a bias function, and to quantify model uncertainty based on collected data from either real tests or high-fidelity CAE simulations. After the corrected model is validated by extra sets of test data, it is integrated into the RBDO formulation to obtain a reliable solution that meets the overall reliability targets while considering both model and parameter uncertainties. The proposed technique is demonstrated through a vehicle design problem aiming at minimizing the vehicle weight through gauge optimization while satisfying reliability constraints.
Technical Paper
2013-04-08
Vijitashwa Pandey, Zissimos Mourelatos
The classical definition of reliability may not be readily applicable for repairable systems. Commonly used concepts such as the Mean Time Between Failures (MTBF) and availability can be misleading because they only report limited information about the system functionality. In this paper, we discuss a set of metrics that can help with the design of repairable systems. Based on a set of desirable properties for these metrics, we select a minimal set of metrics (MSOM) which provides the most information about a system, with the smallest number of metrics. The metric of Minimum Failure Free Period (MFFP) with a given probability generalizes MTBF because the latter is simply the MFFP with a 0.5 probability. It also generalizes availability because coupled with repair times it provides a clearer picture of the length of the expected uninterrupted service. Two forms of MFFP are used: transient and steady state. Other metrics of cost, planning horizon, number of failures within the planning horizon are also used.
Technical Paper
2013-04-08
Mahdi Norouzi, Efstratios Nikolaidis
Estimation of the probability of failure of mechanical systems under random loads is computationally expensive, especially for very reliable systems with low probabilities of failure. Importance Sampling can be an efficient tool for static problems if a proper sampling distribution is selected. This paper presents a methodology to apply Importance Sampling to dynamic systems in which both the load and response are stochastic processes. The method is applicable to problems for which the input loads are stationary and Gaussian and are represented by power spectral density functions. Shinozuka's method is used to generate random time histories of excitation. The method is demonstrated on a linear quarter car model. This approach is more efficient than standard Monte Carlo simulation by several orders of magnitude.
Technical Paper
2013-04-08
Vicente Romero, Joshua Mullins, Laura Swiler, Angel Urbina
This paper discusses the treatment of uncertainties corresponding to relatively few samples of random-variable quantities. The importance of this topic extends beyond experimental data uncertainty to situations involving uncertainty in model calibration, validation, and prediction. With very sparse samples it is not practical to have a goal of accurately estimating the underlying variability distribution (probability density function, PDF). Rather, a pragmatic goal is that the uncertainty representation should be conservative so as to bound a desired percentage of the actual PDF, say 95% included probability, with reasonable reliability. A second, opposing objective is that the representation not be overly conservative; that it minimally over-estimate the random-variable range corresponding to the desired percentage of the actual PDF. The presence of the two opposing objectives makes the sparse-data uncertainty representation problem an interesting and difficult one. The performance of a variety of uncertainty representation techniques is tested and characterized in this paper according to these two opposing objectives.
Technical Paper
2013-04-08
Mohamed F. Aly
The engine fault detection problem is of special interest in the automotive industry due to its direct implementation in the diagnostics of typical engine problems as well as engine preventive and predictive maintenance measures. The procedure of identifying the type and location of an engine fault can be very costly and time consuming. This paper is dedicated to the identification of more than 26 different engine faults using multi-level signal processing technique and an exhaustive search in a predefined database. This database can be easily modified and/or updated to include new types of faults; it also gives the flexibility of providing warning signals of unidentified problems whenever it detects one.
Article
2013-04-03
Donaldson introduces the Twist&Drain line of replacement filters in a convenient package for both off- and on-highway vehicle applications.
WIP Standard
2013-04-03
This aerospace information report (AIR) will review the new landing gear taxi system technology currently being developed by various companies and descibe the basic design concepts and potential benefits and issues. This AIR will identify the associated systems that could be affected by this new technology. The document will review basic design and operational requirements, failure modes and identify system certificational requirements that may be needed to be addressed.
Article
2013-04-02
Each introduced a 50th anniversary example at the 2013 New York International Auto Show. Porsche featured a fifth generation of GT-3, a 911 derivative. Shelby showed the 1000, a new Ford Shelby GT500 Mustang variant that develops 1000 hp for street use on pump gasoline, up to 1200 hp for the track.
WIP Standard
2013-04-02
The purpose of this SAE Aerospace Standard (AS) is to provide guidelines for the components and configurations that define the four versions of the Weather Support to Deicing Decision Making (WSDDM) winter weather nowcasting system.
WIP Standard
2013-04-02
The purpose of this document is to define design, construction, operational, and maintenance requirements for hydrogen fuel storage and handling systems in on-road vehicles. Performance-based requirements for verification of design prototype and production hydrogen storage and handling systems are also defined in this document. Complementary test protocols (for use in type approval or self-certification) to qualify designs (and/or production) as meeting the specified performance requirements are described. Crashworthiness of hydrogen storage and handling systems is beyond the scope of this document. SAE J2578 includes requirements relating to crashworthiness and vehicle integration for fuel cell vehicles. It defines recommended practices related to the integration of hydrogen storage and handling systems, fuel cell system, and electrical systems into the overall Fuel Cell Vehicle. NOTE: Ultimate design qualification for crash impact resistance is achieved by demonstrated compliance of the vehicle with applicable regulations.
Standard
2013-04-02
The “System Emissions Chart” contained herein is intended to serve as a means of estimating the annual refrigerant emission rate (grams per year) from new production A/C systems equipped with specified component technologies. It provides emission values for various component technologies that are currently available, and can be expanded as new technologies are commercialized. This document provides the information to develop an Excel file template “System Emissions Chart” for system emission analysis. The chart includes automotive compressor technologies for conventional mobile air conditioning systems as well as those using semi-hermetic compressors. This standard can be considered a companion document to SAE J2763 Test Procedure for Determining Refrigerant Emissions from Mobile Air Conditioning Systems. SAE J2727 estimates system emissions, taking into account production assembly variation and accounts for components that are 100% helium leak tested prior to vehicle final assembly. The results from SAE J2064 are used to better represent permeation emissions from different hose material and coupling configurations in this version.
Standard
2013-04-01
This SAE Aerospace Recommended Practice (ARP) is intended to document the process of landing gear system development. This document includes landing gear system development plans for commercial, military, fixed wing and rotary wing air vehicles.
Standard
2013-03-28
To establish conditions to be taken into consideration in determining rated loads for mobile cranes when overturning stability is the controlling factor. This recommended practice applies to mobile, construction-type lifting cranes with either lattice booms or cantilevered, telescopic booms.
Standard
2013-03-28
This document provides information and guidance material to assist in assessing the need for and feasibility of developing deicing facilities, the planning (size and location) and design of deicing facilities, and assessing environmental considerations and operational considerations associated with de-icing facilities. The document presents relevant information necessary to define the need for a deicing facility and factors influencing its size, location and operation. The determination of the need for deicing facilities rests with Airports. Although this document intends to provide information to airport operator and deicing facility planner/designer, all stakeholders, including deicing service providers, should be involved in the development process.
Standard
2013-03-28
The purpose of this document is to define design, construction, operational, and maintenance requirements for hydrogen fuel storage and handling systems in on-road vehicles. Performance-based requirements for verification of design prototype and production hydrogen storage and handling systems are also defined in this document. Complementary test protocols (for use in type approval or self-certification) to qualify designs (and/or production) as meeting the specified performance requirements are described. Crashworthiness of hydrogen storage and handling systems is beyond the scope of this document. SAE J2578 includes requirements relating to crashworthiness and vehicle integration for fuel cell vehicles. It defines recommended practices related to the integration of hydrogen storage and handling systems, fuel cell system, and electrical systems into the overall Fuel Cell Vehicle. NOTE: Ultimate design qualification for crash impact resistance is achieved by demonstrated compliance of the vehicle with applicable regulations.
Standard
2013-03-28
This SAE Aerospace Information Report (AIR) considers the following major areas: 1. major components and their ratings; 2. selection criteria for optimum design balance for electrical systems; 3. effects of operating conditions and environment on both maintenance and life of components; 4. trouble signals - their diagnosis and cure.
Standard
2013-03-26
These general guidelines and precautions apply to personnel operating directional drilling tracking equipment when used with Horizontal Earthboring Machines as defined in SAE J2022.
WIP Standard
2013-03-25
This document is applicable to military aircraft where stakeholders are seeking guidance on the development and approval of Structural Health Monitoring (SHM) technologies and on the integration of these technologies into encompassing maintenance and operational support systems. The document will refer to those guidelines prepared under SAE ARP6461 that are relevant and applicable to military applications.
WIP Standard
2013-03-25
This specification covers the requirements for three types and three classes for vacuum deposited cadmium coating.
Standard
2013-03-25
This SAE Aerospace Standard (AS) covers water conditioning agents used to facilitate aqueous wet-method magnetic particle inspection. Such conditioning agents, in powder or liquid form, provide suitable corrosion protection, wetting, and particle dispensability properties when mixed in water for application of magnetic particles on the surface of an object for magnetic particle inspection as described in AMS3042, AMS3044, ASTM E1444, and others. Water conditioning agents can consist of varying combinations of such components as dispersants, surfactants, corrosion inhibitors, and anti-foaming agents. Individual components may be added to the bath of a system to develop specific properties. The user is referred to the manufacturer of the conditioning agent to develop the most suitable combination of ingredients for the user’s requirements.
WIP Standard
2013-03-19
This analysis applies to crane types as covered by Power crane and shovel Association Standard Number Two, Mobile Hydraulic Crane standards and ANSI B30.15; refer to 5.1. This calculation method has been established to illustrate an analysis to determine the competence of hydraulic telescopic cantilevered crane booms.
Standard
2013-03-18
This SAE Metric Aerospace Standard (MA) covers metric double end flare nut wrenches that are designed with the following requirements: a. Non-distorting usage. b. Possessing the strength, clearances, and internal wrenching design to be used on hydraulic tube fittings that conform to the requirements of SAE J514. c. Transmitting torque to tube fittings without bearing on the apex of fitting wrenching points. Inclusion of dimensional data in this document is not intended to imply that all of the products described herein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes.
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