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2015-01-26
WIP Standard
ARP6320
This Aerospace Recommended Practice (ARP) consists of methodologies for the measurement of non-volatile particulate matter (nvPM) emissions at the exit plane of aircraft gas turbine engines. The methods describe means of sampling and measuring particle mass concentration, particle number concentration and reporting of emissions indices through the use of an appropriate sampling system and instrumentation that goes beyond the measurements of visible obscuration as described in ARP 1179 for Smoke Number (SN).
2015-01-26
Standard
AS7119B
This document has been declared "CANCELLED" as of January 2015 and has been superseded by PRI AC7119. By this action, this document will remain listed in the Numerical Section of the Aerospace Standards Index noting that it is superseded by PRI AC7119. Cancelled specifications are available from SAE. This Aerospace Standard (AS) establishes the requirements for suppliers of Electronics Printed Circuit Boards to be accredited by Nadcap. Nadcap accreditation is granted in accordance with SAE AS7003 after demonstrating compliance with the requirements herein. These requirements may be supplemented by additional requirements specified by Nadcap Electronics Task Group. Using the audit checklist (AC7119) will ensure that accredited Electronics Printed Circuit Boards suppliers meet all of the requirements in this standard and all applicable supplementary standards.
2015-01-23
WIP Standard
AIR6236
The standard will apply to (but not necessarily be limited to) cables, line impedance stabilization networks, pre-amplifiers, attenuators, current probes, etc.
2015-01-22
WIP Standard
ARP5996C
This method is designed to evaluate the coking propensity of synthetic ester-based aviation lubricants under single phase flow conditions found in certain parts of gas turbine engines, for instance in bearing feed tubes. This method is applicable to lubricants with a coking propensity, as determined by this method, falling in the range 0.01 to 3.00 mg.
2015-01-20
WIP Standard
AS22520/5
AS22520/5 IS A HAND CRIMPING TOOL USED TO CRIMP INSULATED AND UNINSULATED AS7928 TERMINALS, SPLICES, END CAPS, AND AS81824 SPLICES.
2015-01-20
WIP Standard
AS81969/21
The specification/product is required to support connector specification applications.
2015-01-20
WIP Standard
AS81969/22
The specification/product is required to support connector specification applications.
2015-01-20
WIP Standard
AS81969/12
The specification/product is required to support connector specification applications.
2015-01-20
WIP Standard
AS81969/13
The specification/product is required to support connector specification applications.
2015-01-20
WIP Standard
AS81969/15
The specification/product is required to support connector specification applications.
2015-01-16
WIP Standard
J845
This document provides design guidelines, test procedure references, and performance requirements for omnidirectional and selective coverage optical warning devices used on authorized emergency, maintenance and service vehicles. It is intended to apply to, but is not limited to, surface land vehicles.
2015-01-15
WIP Standard
AS81969/30
TOOL IS USED TO REMOVED UNWIRED CONTACTS FROM VARIOUS CIRCULAR CONNECTORS
2015-01-15
Standard
AS6502
This SAE Aerospace Standard (AS) provides classical propulsion system performance parameter names for aircraft propulsion systems and their derivatives, and describes the logical framework by which new names can be constructed. The contents of this document were, originally, a subset of AS755E. Due to the growing complexity of station numbering schemes described in AS755, and a desire to expand the original document's nomenclature section to include a fuller representation of "classical" (legacy use) names, a decision was made to separate its "station numbering" and "nomenclature" content into two separate documents. This document, then, was created using the "nomenclature" half of AS755E. Both documents will continue to be improved and revised as industry needs dictate. The parameter naming conventions presented herein are for use in all communications concerning propulsion system performance such as computer programs, data reduction, design activities, and published documents.
2015-01-14
Technical Paper
2015-26-0024
Sivanesan Murugesan, Lakshmikanthan Chinnasamy, Abhijeet Patil
Abstract Appropriate test cycle is required for engine testing. To do so, a new methodology is developed for deriving Engine Test Cycle based on real world duty cycle. Transient speed and load is to be collected from the functional engine on the field. The duty cycle for cyclic operation will be developed from the actual transient speed and load conditions. An iterative process and the comparison of chi-square statistical data is used to categorize typical microtrips, segments of engine operation collected during performance of certain activities. Different microtrips of all activities were combined together to make up a cycle of operation and test cycle as well. These data's are compared to statistical data which is used to illustrate the raw data. On successful comparison, the transient test cycle is validated on the test bed. To facilitate further engine testing, the cycle is transformed into a schedule of torque and speed points at One second intervals.
2015-01-14
Technical Paper
2015-26-0069
Srideep Chatterjee, Ravi Chandra Kyasa, Nithin Reddy Gopidi, Prakash Prashanth Ravi
Abstract Every organization needs to effectively manage its data collection and analysis process in order to efficiently collaborate on a global scale. This paper describes a model for standardizing the data collection and analysis process and specifically deals with two challenges in this regard: 1) A method for standardization of the nomenclature of different physical parameters measured during a typical engine test. This is essential for processing data from facilities spread across the globe to run them through a standard set of calculations. The process of storing and performing a given set of complex processes on the data while allowing analysts to view the steps of the processing in a transparent intuitive manner is also described in the paper. 2) Building on the first point, the paper also describes a process for performing a standard set of data quality checks on data as it is being collected. This allows for detection of issues in the data on a real-time basis.
2015-01-14
Technical Paper
2015-26-0064
Asmita Manwatkar, Prasad S Phale, Moqtik Ashok Bawase, Mangesh Ramesh Saraf
Abstract Used oil analysis plays an important role in the field of engine development, considering that it can give brief idea about performance of lubricant/ oil being used, its compatibility with the system under considerations. At present, regular testing is done like elemental analysis using Inductive Coupled Plasma (ICP) which can give idea about wear elements and additive elements. But it does not give information on morphological characterization of particles. In present work, Environmental Scanning Electron Microscopy technique with EDAX detector is used for characterizing the used oil. Oil is filtered on suitable paper and the particles collected on paper are analyzed. This gives the information on morphology and size of particles, their elemental analysis and mapping so that the sources can be judged. Size of wear metal particle is very important factor as even few bigger size particles are more detrimental than large number of smaller particles.
2015-01-14
Technical Paper
2015-26-0075
Ashwin Subramanian Kaundinya, Yogesh S Thipse, Vinayak Shivalink Sagare, Neelkanth V Marathe
Abstract In the quest towards meeting stringent emission norms as well as robust performance requirements, there is an ever growing need to continually research into and develop high caliber engines. This necessitates handling huge amounts of generated test data that monitors a multitude of variables like engine speed, combustion chamber pressure, engine load and the like. Further, in order to establish the scalar engine performance parameters like efficiency, Brake Mean Effective Pressure, Indicated Mean Effective Pressure, P-V diagram, post processing is required to be done on the measured test data that involves complex calculations like numerical integration and other mathematical operations on a grand scale. In order to meet this objective, the authors hereby showcase a knowledge based algorithm that integrates and streamlines the entire procedure from handling of the huge test data to performing all the calculations in order to arrive at the scalar engine performance parameters.
2015-01-14
Technical Paper
2015-26-0122
Herman Van der Auweraer, Karl Janssens, Fabio Bianciardi, Filip Deblauwe, Kumaraswamy Shivashankaraiah
Abstract Certification of vehicle noise emissions for passenger vehicles, motorcycles and light trucks is achieved by measuring external sound levels according to procedures defined by international standards such as ISO362. The current procedure based on a pass-by test during wide-open throttle acceleration is believed far from actual urban traffic conditions. Hence a new standard pass-by noise certification is being evaluated for implementation. It will put testing departments through their paces with requirements for additional testing under multiple ‘real world’ conditions. The new standard, together with the fact that most governments are imposing lower noise emission levels, make that most of the current models do not meet the new levels which will be imposed in the future. Therefor automotive manufacturers are looking for new tools which are giving them a better insight in the Pass-by Noise contributors.
2015-01-14
Technical Paper
2015-26-0126
Prince Shital, Chiranjit Ghosh, Harveen Talwar, Avnish Gosain, Praneet Shanker Dayal
Abstract Three-cylinder Engine without balancer shaft is a recent trend towards development of lightweight and fuel-efficient powertrain for passenger car. In addition, customer's expectation of superior NVH inside vehicle cabin is increasing day by day. Engine mounts address majority of the NVH issues related to transfer of vibration from engine to passenger cabin. Idle vibration isolation for a three-cylinder engine is a challenging task due to possibility of overlapping of Powertrain's rigid body modes with engine's firing frequency. This Overlapping of rigid body can be avoided either by modifying mount characteristic or by changing the position of mounts based on multi-body-dynamics (MBD) simulation. This paper explains about two types of engine mounting system for a front-wheel drive transversely mounted three-cylinder engine. The base vehicle was having three-point mounting system i.e. all three engine mounts were pre-loaded.
2015-01-14
Technical Paper
2015-26-0224
Ramsai Ramachandran, Nilesh Kumar Dehariya, Gaurav Kumar, Himanshu Agarwal, Sukhchain Singh
Abstract BIW (Body-in White) is a type of vehicle structure formed by spot welding of different sheet metal components. The BIW structure should be designed to support the maximum load potential under various performance conditions. Thus the structure should have good strength as well as stiffness. Torsion Stiffness of BIW is the amount of torque required to cause a unit degree of twist. It is often considered as a benchmark of its structural competence due to its effect on various parameters like ride, handling, lateral load distribution and NVH performance of vehicle. The paper aims to design and develop a test methodology and test fixtures for measuring the BIW torsion stiffness with repeatability of test results and also have an (R2>0.99) for the measured values in the test.
2015-01-14
Technical Paper
2015-26-0235
Raju P Soudatti, Ragunathan Amarnath, Ramesh Harish
Abstract Generally it is observed that in city buses most of the time, passenger seat fails at the seat mounting area in buses which are used for more than 3 years. This fatigue failure doesn't get captured either in Anchorage Test or Limited Vibration Test. Passenger seats' durability should be equal to vehicle life which is 10L km or 12 Years of life span. Physical testing on the vibration test rig is time consuming and costly. Most of the time machine availability for testing will be an issue, to validate alternate seat proposals. So there is a need to establish a correlation between physical testing and CAE simulation so that alternate proposals can be easily and quickly verified using CAE alone. This paper deals with the verification and validation of passenger seat in buses for life cycle requirement, through various methodologies adopted from data collection, CAE verification and physical validation to simulate real-time environment.
2015-01-14
Technical Paper
2015-26-0236
Zhiteng Zhou, Yaohua He, Dong Wang
Abstract Aiming to meet vehicle driving safety requirements in automakers, this essay firstly discusses the application of vehicle driving wandering test system. And the real-time performance and reliability of wireless AP communication are the premise in this test system. However, when the test situation is changed especially in strong electromagnetic situation, the communication will be easily interrupted, leading to the delay problem. In order to maintain the real-time performance, this essay proposes an improvement method through analyzing the timeline of dynamic communication progress from the perspective of transport layer in TCP/IP protocol. Then, based on the analysis of Markov Chain model of the communication process, it also discusses the potential factors of the delay problem and puts forward the time division strategy which can effectively complete the authentication in real-time.
2015-01-14
Technical Paper
2015-26-0237
Rajendra More, Darshan Vachhani, Chetan Raval
Abstract Strength and durability of commercial vehicle structure is of prime importance to users while quicker time to market and least material cost are demands of competitive world. This requires assessment not just with simplistic loadcases but robust and accurate predictions closely co-relating real proving ground conditions. This paper demonstrates systematic approach of first road load predictions using MBD model, then stress analysis using FE model and finally life prediction using fatigue solver. MBD model was built using flex body, air suspensions with rigid links and tires with FTire characteristics. Same model ran on various virtual proving grounds and load history at various joints were extracted. Then inertia relief stress analysis with unit loads were carried out in Nastran and output stresses were mapped against load history in fatigue solver.
2015-01-14
Technical Paper
2015-26-0160
Adria Ferrer, Stefanie de Hair, Oliver Zander, Rikard Fredriksson, Swen Schaub, Frederic Nuss, Marie Caspar
Abstract Pedestrians and cyclists are the most unprotected road users and their injury risk in case of accidents is significantly higher than for other road users. The understanding of the influence and sensitivity between important variables describing a pedestrian crash is key for the development of more efficient and reliable safety systems. This paper reflects the related work carried out within the AsPeCSS project. The results summarized out of virtual and physical tests provide valuable information for further development. 1168 virtual and 120 physical tests were carried out with adult and child pedestrian headform as well as upper and lower legform impactors representatives of 4 different vehicle front geometries in a wide range of impact speeds, angles and locations. This test matrix was based on previous work carried out within the AsPeCSS project.
2015-01-14
Technical Paper
2015-26-0192
Sourabh Shrivastava, Padmesh Mandloi
Abstract CFD simulations of an engine cooling system needs to resolve two aspects of the system; in-cylinder combustion and engine cooling. Underlying physics of an in-cylinder combustion process and heat transfer through engine cooling system requires very different time scales for resolution. This puts a limitation on practicality of solving the two problems simultaneously for any industrial case. Instead of solving the problem simultaneously, solution for an engine cooling system operating at a constant load can be derived using the coupled approach. This involves running two different CFD simulations: a transient in-cylinder simulation to model combustion in the engine, and a steady state CHT simulation using engine cooling system for heat transfer. These simulations are thermally coupled through boundary conditions and are performed in cyclic manner one after the other. Simulations are continued till the change in temperature with coupled cycles becomes insignificant.
2015-01-14
Technical Paper
2015-26-0216
Ramesh Babu Pathuri, Prasanna Nagarhalli
Abstract Upfront in a vehicle program, sizing of front end cooling module i.e. Condenser Radiator Fan Module (CRFM) and front grille opening is vital hence simulation tools like 1D have gained tremendous importance. This paper focuses on the modeling and analyzing performance behavior of engine cooling system using 1D simulation tool and also discusses the correlation of simulated results with test results. 1D model of engine cooling system is developed by inputting all necessary geometrical and performance data of all components (radiator heat load, coolant pipe geometry, CRFM, pump, thermostat etc.) with necessary assumptions. Air flow rates used on heat exchangers are predicted in 3D Computation Fluid Dynamics (CFD) analysis. First isothermal coolant circuit is modeled and coolant flow correlation is achieved to build confidence in modeling.
2015-01-14
Technical Paper
2015-26-0188
Prashant Khapane, Uday Ganeshwade, Kevin Carvalho
Abstract Vehicle water wading capability refers to vehicle functional part integrity (e.g. engine under-tray, bumper cover, plastic sill cover etc.) when travelling through water. Wade testing involves vehicles being driven through different depths of water at various speeds. The test is repeated and under-body functional parts are inspected afterwards for damage. Lack of CAE capability for wading equates to late detection of failure modes which inevitably leads to expensive design change, and potentially affects program timing. It is thus of paramount importance to have a CAE capability in this area to give design loads to start with. Computational fluid dynamics (CFD) software is used to model a vehicle travelling through water at various speeds. A non-classical CFD approach was deemed necessary to model this. To validate the method, experimental testing with a simplified block was done and then verified with CFD modeling.
2015-01-14
Technical Paper
2015-26-0159
Tripti Jain, Tanvee Adhikari
Abstract During vehicle development, numerous test are done to ensure safety & durability of the vehicle. One such test prescribed by regulation (IS 12009:1995) is side door intrusion test (SDIT). This test evaluates strength requirement of a side door of passenger cars to minimize the safety hazards caused by intrusion into passenger compartment in a side impact accident viz., initial, intermediate and peak crush resistance. In current scenario the passenger car manufacturers are striving hard on cost reduction by reducing the development cost. Thus, to predict the exact vehicle performance before its prototype stage is vital. This can be achieved by evaluating performance by the help of Computer aided engineering (CAE) During the SDIT, the load is applied to the outer surface of the door in an inward direction. This inward force applied by loading device is resisted by the door assembly, while door is pivoted at door latch and hinge.
Viewing 181 to 210 of 23530

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