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Viewing 1 to 30 of 26332
2017-06-05
Technical Paper
2017-01-1781
Joshua Wheeler
Automatic Speech Recognition (ASR) and Hands Free Communication (HFC) capabilities have become prominent in the automotive industry, with over 50% of new vehicle sales equipped with some level of ASR system. With the common use of mobile personal assistants and smartphones with Bluetooth capability, customer expectations for built in ASR and HFC systems have increased significantly. The performance of these ASR and HFC systems are highly dependent on the level of background or “masking” noise that competes with the speech engine’s ability to correctly convert the driver’s speech to actionable commands. HVAC noise provides high amplitudes of broadband frequency content that affects the signal to noise ratio (SNR) within the vehicle cabin, and works to mask the user’s speech. Furthermore, when the airflow from the panel or defroster vents are directed toward the vehicle microphone, a mechanical “buffeting” phenomenon occurs that distresses the ASR system even further.
2017-06-05
Technical Paper
2017-01-1853
SangHeon Lee, TaeHun Kim, SeungHwan Shin, YangNam Lim
Information of loading mass is a crucial factor in indirect tire pressure monitoring system (iTPMS). Using a novel zero-crossing frequency method, mass change can be estimated from the wheel speed signals. The compatibility with iTPMS is demonstrated by field test result. Finally, this novel method can be applied for iTPMS and chassis control system.
2017-06-05
Technical Paper
2017-01-1904
Tan Li, Ricardo Burdisso, Corina Sandu
Tire-pavement interaction noise (TPIN) is a dominant source for passenger cars and trucks above 40 km/h and 70 km/h, respectively. TPIN is mainly generated from the interaction between the tire and the pavement. In this paper, twenty-two tires of the same size (16 in. radius) but with different tread patterns were tested on a non-porous asphalt pavement. For each tire, the noise data were collected using an on-board sound intensity (OBSI) system at five speeds in the range from 45 to 65 mph. The OBSI system used an optical sensor to record a once-per-revolution signal to monitor the vehicle speed. This signal was also used to perform order tracking analysis to break down the total tire noise into two components: tread pattern-related noise and non-tread pattern-related noise.
2017-06-05
Technical Paper
2017-01-1829
Guillaume Loussert
The new fuel efficiency and emission standards have forced OEMs to put emphasis on different strategies such as engine downsizing, cylinder deactivation... Unfortunately these new technologies may lead to increased powertrain vibrations generated by the engine and transmitted to the chassis and the car cabin, such that their reduction or elimination has become a key topic for the automotive industry. The use of active engine mounts, acting directly on the fluid of an hydromount, or active vibration dampers, acting as an inertial mass-spring system, are very effective solutions, particularly when using electromagnetic based actuators. Nevertheless, all electromagnetic actuators technologies are not equals and the choice of such actuators must be considered carefully by taking into account the full performances and the overall cost of the solutions. This paper presents an electromagnetic actuator technology, that can be considered as the best tradeoff between performances and cost.
2017-06-05
Technical Paper
2017-01-1872
Masao Nagamatsu
The almost current sound localization methods do not have enough resolution in low frequency sound localization. To overcome this disadvantage, I am now developing a new sound localization method, Double Nearfield Acoustic Holography (DNAH) method. This method is a converted method of conventional Nearfield Acoustic Holography (NAH) method. In this proposing method, the resolution of low frequency sound localization is improved by using sound propagation information on doubled measurement planes. To prove the performance of proposing method, the basic experiments with variable conditions are conducted. In these experiments, the small speakers are used as sound sources. In this paper, to discuss the ability to apply to actual industry, the effect of measurement distance from sound source is explained. Some experimental results with changing measurement distance are shown in this paper.
2017-06-05
Technical Paper
2017-01-1874
Tongyang Shi, Yangfan Liu, J Stuart Bolton, Frank Eberhardt, Warner Frazer
Wideband Acoustical Holography, which is a monopole-based equivalent source procedure (J. Hald, “Wideband Acoustical Holography”, INTER-NOISE 2014), have been proven to offer an accurate noise source holography result in experiments with a simple noise source: e..g., a loudspeaker (T. Shi, Y. Liu, J. Bolton, ”The Use of Wideband Holography for Noise Source Visualization”, NOISE-CON 2016). From a previous study, it was found that the advantage of this procedure is the ability to optimize the solution in the case of an under-determined system: i.e., when the number of measurements is less than the number of parameters that must be estimated in the model. In the present work, a diesel engine noise source was measured by using one set of measurements from a thirty six channel irregular array placed in front of the diesel engine.
2017-06-05
Technical Paper
2017-01-1783
Chris Todter, Olivier Robin, Paul Bremner, Christophe Marchetto, Alain Berry
Fluctuating surface pressure measurements using microphone arrays are still challenging, especially in an automotive context with cruising speeds around Mach 0.1. The separated turbulent boundary layer excitation and the side mirror wake flow generate both acoustic and aerodynamic components, which have wavenumbers that differ by a factor of approximately 10. This calls for high spatial resolution measurements to fully resolve the wavenumber-frequency spectrum. In SAE paper 2015-01-2325, the authors reported a micro-electro-mechanical (MEMS) surface microphone array that successfully used wavenumber analysis to quantify acoustic versus turbulence loading. It was shown that the measured surface pressure at each microphone could be strongly influenced by self noise induced by the microphone ”packaging”, which can be attenuated with a suitable windscreen.
2017-06-05
Technical Paper
2017-01-1849
Laurent Gagliardini, Romain Leneveu, Aurélien Cloix, Alexandre Durr
The door response to audio excitation contributes to the overall performance of the audio system on several items. First, acting as a cabinet, it influences the loudspeaker response. Second, due to the door inner panel radiation, the radiated power is disturbed. A third effect is the regular occurrence of squeak and rattle, that will not be considered at this stage. Design issues regarding these attributes are numerous, from the loudspeaker design to door structure and trim definition. Modeling then appears as an unavoidable tool to handle the acoustic response of the loudspeaker in its actual surrounding.
2017-06-05
Technical Paper
2017-01-1755
Frank C. Valeri, James T. Lagodzinski, Scott M. Reilly, John P. Miller
Hybrid powertrain vehicles inherently create discontinuous sounds during operation. The discontinuous noise created from the electrical motors during transition states are undesirable since they can create tones that do not correlate with the dynamics of the vehicle. The audible level of these motor whines and discontinuous tones can be reduced via common noise abatement techniques or reducing the amount of regeneration braking. One electronic solution which does not affect mass or fuel economy is Masking Sound Enhancement (MSE). MSE is an algorithm that uses the infotainment system to mask the naturally occurring discontinuous hybrid drive unit and driveline tones. MSE enables a variety of benefits, such as more aggressive regenerative braking strategies which yield higher levels of fuel economy and an overall more pleasing interior vehicle powertrain sound. This paper will discuss the techniques and signals used to implement MSE in a hybrid powertrain equipped vehicle.
2017-05-18
Journal Article
2017-01-9678
G Agawane, Varun Jadon, Venkatesham Balide, R Banerjee
Abstract Liquid sloshing noise from an automotive fuel tank is becoming increasingly important during frequent accelerating/decelerating driving conditions. It is becoming more apparent due to significant decrease in other noise sources in a vehicle, particularly in hybrid vehicles. As a step toward understanding the dynamics of liquid sloshing and noise generation mechanism, an experimental study was performed in a partially filled rectangular tank. A systematic study was performed to understand the effects of critical parameters like fill level and acceleration/deceleration magnitude. Response parameters like dynamic pressure, dynamic force, dynamic acceleration and sound pressure levels along with high speed video images were recorded. The proposed experimental setup was able to demonstrate major events leading to sloshing noise generation. These events in the sloshing mechanism have been analysed from the dynamic sensor data and correlated with high speed video images.
2017-04-28
WIP Standard
J2892
This document establishes standard graphical symbols and color conventions for use in either still (static) or animated graphics used for communicating service information. This document’s purpose is to communicate conventions for using those symbols and colors to accurately and consistently communicate intended information via graphics-based documentation. These practices are intended for use in service procedures, assembly instructions, training materials, and similar applications when trying to minimize the amount of human natural language text used within the document. The still and animated graphical conventions referenced should support effective communication via paper and “traditional” electronic media. The conventions can also extend to documenting via additional electronic delivery paradigms such as Augmented Reality (AR).
CURRENT
2017-04-27
Standard
J1939DA_201704
This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use. The J1939 Digital Annex, introduced in August 2013, offers key J1939 technical data in an Electronic Spreadsheet that can be easily searched, sorted, and adapted to other formats. J1939DA contains all of the SPNs (parameters), PGNs (messages), and other J1939 data previously published in the SAE J1939 top level document. J1939DA also contains all of the SLOTs, Manufacturer ID Codes, NAME Functions, and Preferred Addresses previously published in the SAE J1939 top level and the J1939-71 document. J1939DA contains the complete technical details for all of the SPNs and PGNs previously published in the SAE J1939-71 document. It also includes the supporting descriptions and figures previously published in the SAE J1939-71 document.
2017-04-26
WIP Standard
AS1145D
This specification covers minimum requirements for brake temperature monitoring equipment whenever used on any type and model of civil aircraft. It shall be the responsibility of the purchaser to determine the compatibility of these requirements with the application aircraft and to specify requirements in excess of these minimums as necessary.
2017-04-25
Article
SAE's Connect2Car Executive Leadership Forum is designed to promote high-level discussion of connectivity business models, technology insertion strategies and other issues concerning the fusion of the automotive and technology sectors.
2017-04-25
WIP Standard
J2602/2
This document covers the tests to be performed on all SAE J2602-1 defined Master and Slave nodes. Tests described in this document will ensure a minimum standard level of performance to which all compatible Electronic Control Unit (ECUs) and media shall be designed. This will assure full serial data communication among all connected devices regardless of supplier. The goal of SAE J2602-2 is to improve the interoperability and interchangeability of LIN devices within a network by verifying the devices pass a minimum set of tests. To allow for easy cross-reference, this document is arranged such that the conformance test for a given section in SAE J2602-1 is in the same section in SAE J2602-2. This document is to be referenced by the particular vehicle Original Equipment Manufacturer (OEM) component technical specification that describes any given ECU in which the LIN data link controller and physical layer interface is located.
2017-04-24
WIP Standard
AMS6457E

This specification covers a low alloy steel in the form of welding wire. Type 2 – Copper Coated wire was removed from this document (see 8.5).

CURRENT
2017-04-24
Standard
AS18029B
SCOOPE IS UNAVAILABLE.
CURRENT
2017-04-21
Standard
AIR6162
This document provides an orientation to fusion splicing technology for optical fibers and fiber optic cable. It is intended for managers, designers, installers, and repair and maintenance personnel who need to understand the process of fusion splicing. This technology is widely used in telecommunications and industrial applications, and is finding acceptance in aerospace applications.
2017-04-20
WIP Standard
J1362
SAE J1362 presents graphical symbols for use on operator controls and other displays on off-road work machines as defined in SAE J1116 plus mobile cranes but excluding agricultural tractors. Symbols for agricultural tractors are covered by ASABE S304, ISO 3767-1, and ISO 3767-2.
CURRENT
2017-04-20
Standard
AS20708/68B
Scope is unavailable.
CURRENT
2017-04-20
Standard
AS20708/62B
Scope is unavailable.
CURRENT
2017-04-20
Standard
AS20708/76B
Scope is unavailable.
CURRENT
2017-04-20
Standard
AS20708/70B
No Scope Available
CURRENT
2017-04-20
Standard
AS20708/78B
Scope is unavailable.
CURRENT
2017-04-19
Standard
AS20708/66B
No Scope Available
CURRENT
2017-04-19
Standard
AS20708/79B
No Scope Available
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