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Viewing 1 to 30 of 4365
2015-10-06
Event
Humans are machines are interacting and operating as one unit and the need to have intuitive controls keep increasing with the escalation of machine features. The operator not only has to control several different functions but also has to monitor several information sources and make informed decisions in real-time. Information, especially safety critical information, needs to be prioritized and displayed to the machine operators and provide them with intuitive actionable options.
2015-09-29
Technical Paper
2015-01-2838
Dharmar Ganesh
In-vehicle displays such as an instrument cluster in a vehicle provide vital information to the user. The information in terms of displays and tell-tales needs to be perceived by the user with minimal glance during driving. Drivers must recognize the condition of the vehicle and the state of its surroundings through primarily visual means. Drivers then process this in the brain, draw on their memory to identify problem situations, decide on a plan of action and execute it in order to avoid an accident. There are visual hindrances seen in real world scenario such as obscuration, reflection and glare on the instrument cluster which prevents the vital information flow from vehicle to the driver. In order to ensure safety while driving, the instrument cluster or driver displays should be placed in an optimized location. This paper deals with how to achieve a visual hindrance free cluster position in a vehicle to protect the important information flow from the vehicle to the driver.
2015-09-29
Technical Paper
2015-01-2843
Xu Kuang, Jianqiang Wang, Keqiang Li
Transport vehicles consume a large amount of fuel with low efficiency, which is significantly affected by driver behavior. An assessment system of eco-driving pattern for buses could identify the deficiencies of driver operation as well as assist transportation enterprises in driver management. This paper proposes an assessment method regarding drivers’ economic efficiency, considering driving conditions obtained from the GPS data and an online map database. To this end, assessment indexes are extracted from driving economy theories and ranked according to their effect on fuel consumption, derived from a database of 135 buses using multiple regression. The 12 selected characteristic indexes represent four aspects of driving behavior including speed, acceleration, engine and accessories control. A layered structure of assessment indexes is developed with application of AHP, and the weight of each index is estimated.
2015-09-29
Technical Paper
2015-01-2767
Sanjay L, Vijayakumar Chekuri, Arthanareeswaran Palaniappan
The emerging trends in commercial vehicle technology have increased the necessity for critical attribute engineering refinements. Drivability is emerging as one of the critical attributes in the automotive sector. The degree of smoothness in a vehicle’s response to the driver’s input is termed as drivability. This attribute has to be rigorously refined in order to achieve a brand specific vehicle character which will ensure a thorough product differentiation. In order to calibrate for a positive drivability feel, a methodology for evaluation of drivability is a prerequisite. The scope of this paper is aimed at detailing the methodology for evaluation of drivability attributes in commercial vehicles. Drivability is highly subjectively perceived attribute, therefore a subjective assessment technique to assess drivability attributes and sub-attributes are explained. Further, to quantify these attributes an objective measurement methodology is necessary.
2015-09-29
Technical Paper
2015-01-2766
Sai Venkatesh Muravaneni, Egalaivan Srinivasan, Jagankumar Mari
Steering wheel being the most used tactile point in a vehicle, its feel and response is an important factor based on which the vehicle quality is judged. Engineering the right feel and response into the system requires knowledge of the objective parameters that relate to the driver perception. Extensive correlation work has been done in the past pertaining to passenger cars, but the driver requirements for commercial vehicles vary significantly. Often it becomes difficult to match the right parameters to the steering feel experienced by the drivers since most of the standard units used to describe them are of zero or first order parameters. Analyzing the second order parameters gave a better method to reason driver related feel. Also, each subjective attribute was fragmented into sub-attributes to identify the reason for such a rating resulting in the identification of the major subjective parameters affecting driver ratings.
2015-09-15
Technical Paper
2015-01-2440
Robert Moehle, Jason Clauss
From the dawn of commercial air travel until 2001, labor costs loomed as the greatest expense in commercial aviation. Though fuel costs have since taken the top spot, labor costs remain a pressing area of concern in the airline industry. Airlines have long sought to reduce the burden of labor to improve the businesses’ bottom line. One of their most frequent appeals has been to allow a single flight crew member to operate the aircraft. Safety concerns represent the dominant barrier to single-pilot Part 121 operations. The FAA and Congress consistently demonstrate a bias toward conservatism in their regulation of airlines and commercial aircraft. Under-educated on the true failure rates, bureaucrats and the general public fall prey to isolated news stories about pilots becoming ill or falling asleep in the flight deck. Yet, in an alarming spate of recent airline accidents, the presence of multiple crewmembers did nothing to prevent, and actually may have contributed to, the crash.
2015-09-15
Technical Paper
2015-01-2401
Michael Schmidt, Philipp Nguyen, Mirko Hornung
The projected uptick in world passenger traffic challenges the involved stakeholder to optimise the current aviation system and to find new solutions being able to cope with this trend, since especially large hub airports are congested and operate at their capacity limit. Delays due to late arrival of aircraft or unreliable and inefficient ground operation processes would disrupt the airport operations tremendously. Various concepts improving the current turnaround processes have been presented thus far, whereby radical aircraft design changes have little chances for realization. Based on a clustering of aircraft interfaces, such as doors and services panels, for state-of-the-art passenger aircraft, concepts targeting to reduce the required resources and time are presented. By maintaining the established overall aircraft configuration, the concepts promote higher probability to become commercially available for aircraft manufactures and operators.
2015-09-15
Technical Paper
2015-01-2537
Sylvain Hourlier
The efficiency of the glass cockpit paradigm has faded away with the evolution of the aeronautical environment (traffic increase & permanence of service). Today's problem lies with "non-defective aircraft" monitored by "perfectly trained crews" still involved in fatal accidents. One explanation is, at the crew level, that we have reached a system complexity that, while acceptable in normal conditions, is hardly compatible with human cognitive abilities in degraded conditions. The current mitigation of such risk still relies on the enforcement through intensive training of an ability to manage extremely rare (off-normal) situations. These are explained by the potential combination of failures of highly complex systems with variable environment & with variable humans.
2015-08-19
Event
2015-07-09
WIP Standard
AIR6341
The purpose of this AIR is to compile in one definitive source, commonly accepted calibration, acceptance criteria and procedures for simulation of Supercooled Large Droplet (SLD) conditions within icing wind tunnels. Facilities that meet the criteria for either some or all of the recognized conditions will have known SLD icing simulation capability.
2015-07-08
WIP Standard
ARP6253A
This document presents minimum criteria for the design and installation of LED assemblies in aircraft. The use of “shall” in this specification expresses provisions that are binding. Non-mandatory provisions use the term “should.”
2015-06-30
Standard
J2944_201506
This Recommended Practice, Operational Definitions of Driving Performance Measures and Statistics, provides functional definitions of and guidance for performance measures and statistics concerned with driving on roadways. As a consequence, measurements and statistics will be calculated and reported in a consistent manner in SAE and ISO standards, journal articles proceedings papers, technical reports, and presentations so that the procedures and results can be more readily compared. Only measures and statistics pertaining to driver/vehicle responses that affect the lateral and longitudinal positioning of a road vehicle are currently provided in this document. Measures and statistics covering other aspects of driving performance may be included in future editions. For eye glance-related measures and statistics, see SAE J2396 (Society of Automotive Engineers, 2007) and ISO 15007-1 (International Standards Organization, 2002).
2015-06-23
WIP Standard
J2889/1
This SAE Standard is derived from SAE J2805 and specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.. The specifications reproduce the level of sound which is generated by the principal vehicle sound sources consistent with stationary and low speed vehicle operating conditions relevant for pedestrian safety. The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle. The test method requires an acoustic environment which is only obtained in an extensive open space or in special designed indoor facilities replicating the conditions of an extensive open space. Such conditions usually exist during: Measurements of vehicles for regulatory certification. Measurements at the manufacturing stage. Measurements at official testing stations.
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