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Viewing 271 to 19 of 19
2016-02-01
Technical Paper
2016-28-0182
Indrakaran Reddy, Niraj Kumar Singh, Sonu Kumar Singh
Abstract In laboratory car crash tests, Anthropomorphic Test Devices (ATD) are equipped with piezoresistive and resistive sensors for occupant injury assessment. Accelerometers are inertial transducers that convert acceleration into electrical output which can be easily recorded by a Data Acquisition System (DAS). For an accelerometer, this electrical output mainly depends upon subjected acceleration, sensitivity of the accelerometer, excitation voltage and gain provided. Before use in testing, accelerometers are calibrated at a standard excitation (manufacturer decided) voltage to determine characteristics like Sensitivity, Sensitivity per unit excitation voltage, Zero Measurand Output (ZMO), Transverse Sensitivity etc. It is observed that these characteristics are highly dependent on the excitation voltage. In testing, due to limitations of DAS and/or other unwanted noise in the excitation voltage, these accelerometers are sometimes used at a different excitation voltage.
2016-02-01
Technical Paper
2016-28-0080
Jesu Rajendran Gnanaswamy, Kumaraswami Dhas
Abstract A safe vehicle is able to save lives even during worst collision scenario. Today’s vehicles have many safety systems both active and passive to save occupants. Improving the safety of pedestrian is now concentrated upon by the design engineers. Front bumper is the first member coming in contact during a frontal collision with a pedestrian. A safe bumper design helps in reducing pedestrian fatality. The requirements for pedestrian safety are not compatible with no component damage at 5 KMPH rule by the insurance agencies. This paper aims to reduce the gap in incompatibility of front bumper to meet the various requirements by changing the role of crash bars. From the point of view of pedestrians a bull bar/ crash bar is not a safety device, but it can be made into an independent component designed specifically to protect the pedestrians.
2016-02-01
Technical Paper
2016-28-0050
Deepak Agrawal, Sharad Rawat, A. K. Upadhyay
Abstract Corrugated tubes are one among the different types of energy absorbers being used for the protection of passengers during impact /crash events of vehicles. Present work is primarily focused to analyze the effect of the variations of wavelength and amplitude of corrugation along the length of the tube on the crashworthiness of the tube. The circumferential corrugations in the tubes are graded by varying two parameters - wavelength and amplitude individually as well as simultaneously using different sinusoidal corrugation functions. The dynamic impact analysis has been carried out using LS-DYNA FEM code using shell elements for meshing and Magnesium alloy AZ31 as material. Energy absorbed, initial peak force, mean force and stroke length are the parameters used in this comparative study. It is observed that the initial reaction forces as well as the ratio of the mean reaction force to peak load changes with the grading of corrugation.
2016-02-01
Technical Paper
2016-28-0210
Abhishek Sinha, Kamlesh Yadav, Rajdeep Singh Khurana
Abstract The biggest challenge in vehicle BIW design today is to make a light, cost effective and energy absorbing structure. With the increasing competition as well as increasing customer awareness, today’s vehicle has to satisfy several aesthetic and functional requirements besides the mandatory regulatory requirements. While working on global platform, it is challenging to comply with both pedestrian protection and low speed bumper impact (ECE-R42) and at the same time meeting the styling intent of reducing the front overhang. Pedestrian lower leg compliance demands space between bumper member and bumper, a condition that reduces the space available for energy absorption during low speed impact (ECE-R42). Therefore, reduction in front overhang poses a problem in meeting both the requirements with limited space.
2016-02-01
Technical Paper
2016-28-0226
Rakesh Kumar, Aditya Malladi
Abstract For effective occupant protection, automotive vehicle structure needs to be developed for seat anchorage test to prevent the failure of seat anchorages during high speed impacts. Seat anchorages (SA) certification test is mandatory for M & N category vehicles in India. Conventional way of testing automotive vehicle structures for seat anchorage test is using deceleration sled with the help of bungee ropes. Deceleration pulse generated from the physical test is used as a loading input in the current CAE process. With the current CAE method, final deformation of the vehicle structure looks similar to physical test, however, the vehicle visual interactions differ significantly during the deformation event. In the current study, a modified loading methodology is proposed to match both the final deformation as well as vehicle visual interactions. Loading and boundary conditions of physical test were understood in detail with the help of simple free body diagrams.
2016-02-01
Technical Paper
2016-28-0250
Kamlesh Yadav, Ruhi Thakur
Abstract Hood is the closure provided in the frontal portion of the vehicle for covering the engine room. Any component disposed in the frontal portion of the vehicle becomes important because of aesthetic as well as regulatory requirements. Introduction of new regulations like pedestrian protection brings new challenges for the original equipment manufacturers and the governing authorities. Introduction of Pedestrian Protection regulation, a recent development in the automotive industry, has thrown several questions in front of original equipment manufacturers. This work explains the procedure to address such question and the learning associated with it.
2016-02-01
Technical Paper
2016-28-0251
Kantilal Patil, Siva Reddy, Nadeem Zafar
Abstract In the event of a frontal car crash, occupant sitting in a car meets various types of injuries like Head injury, Chest compression, Neck injury etc. These injuries may lead to the death of an occupant if exceeded beyond biomechanical limits. Seat belt is a primary restraint system, which when worn controls the motion of occupant sitting inside the car during the event of a car crash. An Anchorage location of three point seat belt system has significant effect on occupant injuries during the crash event. By changing the mount locations of a seat belt anchor points i.e. D-ring, Anchor & Buckle, performance of seatbelt system can be enhanced further thereby reducing occupant injuries to certain extent. As per regulation AIS015, locations of safety belt anchorage points should be within prescribed zone.
2016-02-01
Technical Paper
2016-28-0254
Nitin Tekavde, Srikari Srinivas, Vinod Banthia, Suman Mittemari
Abstract Design of vehicle structure to provide safe structural environment for occupants of vehicles involved in high speed (> 15 km/h) collisions has drawn considerable resources as safety of humans is at stake. Low speed impacts, since these do not cause severe injuries to the occupants, do not generate much concern. However, structural design for this situation has generated a lot of interest among insurance companies as the structural damage caused by these types of collisions is substantial, requiring significant payments by the insurance companies. In this work alternative designs for crash-box have been assessed for RCAR (Research Council of Automotive Repairs) requirement for frontal crash. Using structural details of an existing sedan, various designs of crash-box that can be fitted within the packaging space have been assessed for low speed impact.
2016-02-01
Technical Paper
2016-28-0244
Kumaraswamy Udugu, Viswanatha Reddy Saddala, Sridhar Lingan
Abstract Traffic injuries are an important public health issue. To prevent these injuries, safety systems in a vehicle are recognized as valuable tools. These safety systems are active before and during a crash event. Passive safety is one such safety tool which comprises of occupant restraint systems to prevent fatal injuries during an event of a crash. To improve the real life safety further, active safety systems plays an important role in mitigating the real world accidents. Moreover, effective integration of active and passive safety systems has a potential to further reduce car occupant fatalities. However, in the recent developments in India towards road safety, vehicle safety standards are oriented more towards passive safety. In the present work, road accidents data from India between 2005 and 2014 are studied, to estimate the major mode of accidents and factors influencing the fatal injuries.
2016-02-01
Magazine
Clamoring for more entertainment Connected consumers drive demand for bandwidth, though seatback entertainment remains popular. Fighting for life in military markets Airbus Defense & Space is looking to revitalize and ramp up production rates of its military aircraft portfolio.
2016-02-01
Technical Paper
2016-28-0166
SriRamaChandraMurthy Batchu
Primary function of the inverter in an Electric or Hybrid Electric vehicle (EV/HEV) is to generate required AC voltage from high voltage battery to drive Electrical machine (EM). Being part of power-train of the vehicle, inverters (or hybrid control units (HCU)) are safety related electronic control units (ECU) due to the severity of the accidents/incidents that could result if the ECU is not functional as intended. Therefore it is necessary to develop the inverter in accordance with applicable safety standards. The standard ISO 26262 in particular addresses the complete development cycle of safety related automotive products. OEMs now mandate the strict adherence to ISO26262 standard for such ECUs. This paper describes how safety principles are realized in the hardware modules of inverter, which are responsible for the functional safety adherence.
2016-01-29
WIP Standard
EIASTD4899C
This document applies to the development of Plans for integrating and managing electronic components in equipment for the military and commercial aerospace markets; as well as other ADHP markets that wish to use this document.

Examples of electronic components, as described in this document, include resistors, capacitors, diodes, integrated circuits, hybrids, application specific integrated circuits, wound components, and relays.

It is critical for the Plan owner to review and understand the design, materials, configuration control, and qualification methods of all “as-received” electronic components, and their capabilities with respect to the application; identify risks, and where necessary, take additional action to mitigate the risks.

The technical requirements are in Clause 3 of this standard, and the administrative requirements are in Clause 4.

2016-01-27
WIP Standard
ARP5297B
This SAE Aerospace Recommended Practice (ARP) provides the qualification test procedure requirements for low wattage halogen lamps (less than 35 Watts) intended for use primarily in aircraft applications. The purpose of these tests is to provide a laboratory means of determining the performance characteristics of lamps in airplane power and environmental conditions and to verify the integrity of the lamp design and production process.
2016-01-27
WIP Standard
AS4273B
This document establishes requirements, test procedures, and acceptance criteria for the fire testing of fluid handling components and materials used in aircraft fluid systems. It is applicable to fluid handling components other than those prescribed by AS1055 (e.g., hoses, tube assemblies, coils, and fittings). It also is applicable to materials, wiring, and components such as reservoirs, valves, gearboxes, pumps, filter assemblies, accumulators, fluid-cooled electrical/electronic components, in-flight fluid system instrumentation, hydromechanical controls, actuators, heat exchangers, and manifolds. These components may be used in fuel, lubrication, hydraulic, or pneumatic systems.
2016-01-26
WIP Standard
EIA4900A
This document prescribes processes for using semiconductor devices in wider temperature ranges than those specified by the device manufacturer. It applies to any designer or manufacturer of equipment intended to operate under conditions tht require semiconductor devices to function in temperature ranges beyond those for which the devices are marketed. This document is intended for applications in which only the performance of the device is an issue. Even though the device is used at wider temperatures, the wider temperatures will be limited to those that do not compromise the system performance or application-specific reliability of the device in the application. Specifically, this document is not intended for applications that require the device to function at an operating or environmental stress level that significantly increases the risk of catastrophic device failure, loss of equipment function, or unstable operation of the device.
2016-01-26
WIP Standard
AS5958F
This SAE Aerospace Standard (AS) establishes the requirements for externally swaged titanium tube fittings on titanium and CRES tubing with flareless separable fitting for use in hydraulic supply and return aerospace fluid systems up to operating pressure of 5080 psig (35 000 kPa) maximum and an operating temperature range of -65 to +275 °F (-54 to +135 °C). This specification covers a common 5080 psi pressure titanium fitting that may be used for a range of operating pressures up to 5080 psi with different tubing materials and tubing wall thicknesses, and is assembled with the same tooling in accordance with AS5959. The fitting operating pressure is based on the fitting thread pitch. Extra fine pitch for 5080 psi operating pressure and fine pitch for operating pressures 3000 psi and less. Table 12 shows applicable aerospace fitting part number standard and tubing materials and operating pressures.
2016-01-26
WIP Standard
J1981
The test is designed to evaluate the frontal impact resistance of wheel and tire assemblies used with passenger cars, light trucks and multi-purpose vehicles. The test is specifically related to vehicle pothole tests that are undertaken by most vehicle manufacturers. The scope has been expanded to allow the use of a striker that can be angled to preferentially impact the inboard and outboard wheel flange. For side impact of the outboard rim flange only, please refer to SAE J175. This SAE Recommended Practice provides a procedure to test a wheel or a tire and the test failure critiera. The specific test for a vehicle requires input from a pothole test on that vehicle to establish the drop height of the striker used in this test.
2016-01-26
WIP Standard
AS8002B
This SAE Aerospace Standard (AS) covers air data computer equipment (hereinafter designated the computer) which when connected to sources of aircraft electrical power, static pressure, total pressure, outside air temperature, and others specified by the manufacturer (singly or in combination) provides some or all of the following computed air data output signals (in analog and/or digital form) which may supply primary flight instruments: pressure altitude; pressure altitude, baro-corrected; vertical speed; calibrated airspeed; mach number; maximum allowable airspeed; overspeed warning; and total air temperature. In addition, the computer may supply one or more of the following signals: pressure altitude, digitized; equivalent airspeed; true airspeed; static air temperature; altitude hold; airspeed hold; mach hold; angle of attack; flight control gain scheduling; and others.
2016-01-25
WIP Standard
AIR6373
pilots, air traffic controllers, dispatchers, aviation meteorologists
2016-01-25
Standard
ARP1907C
This SAE Aerospace Recommended Practice (ARP) covers the functional, design, construction, and test requirements for Automatic Braking Systems. Installation information and lessons learned are also included.
2016-01-21
Article
Demand for a faster, secure approach to reprogramming on-board control modules, particularly for safety issues, is more urgent than ever. Over-the-air technologies bring a new set of issues, says an expert at Wind River.
2016-01-20
Article
System offers fast response and eliminates piston drag, but hydraulic output to front wheels is still needed for larger cars.
2016-01-20
Article
Volvo's new premium sedan is built on the SPA scalable architecture. Semi-autonomous "Pilot Assist" operates at up to 80 mph and features large animal detection.
2016-01-20
Standard
J1432_201601
This SAE Recommended Practice provides test procedures, requirements, and guidelines for high-mounted stop lamps and high-mounted turn signal lamps intended for use on vehicles 2032 mm or more in overall width. This document applies to trucks, motor coaches, van type trailers, and other vehicles with permanent structure greater than 2800 mm high. This document does not apply to school buses, truck tractors, pole trailers, flat-bed trailers, pick-up truck with dual wheels and trailer converter dollies. The purpose of the high-mounted stop lamp(s) and high-mounted turn signal lamp(s) is to provide a signal over intervening vehicles to the driver of following vehicles.
2016-01-20
Standard
J2040_201601
This SAE Standard provides test procedures, requirements, and guidelines for tail lamps intended for use on vehicles 2032 mm or more in overall width. Tail lamps conforming to the requirements of this document may also be used on vehicles less than 2032 mm in overall width.
2016-01-18
WIP Standard
ARP4102/10B
This document presents criteria for flight deck controls and displays for airborne collision avoidance systems providing vertical-only guidance, and provides design guidance for operational, functional, and installation characteristics and requirements for airborne collision avoidance systems in existing and future aircraft.
2016-01-18
WIP Standard
ARP4101/8A
This document recommends criteria for standardization of flight deck interior doors and their operation which will provide optimum use under normal and emergency conditions.
2016-01-14
Standard
J2292_201601
This SAE Recommended Practice establishes minimum performance and test requirements for combination pelvic and upper torso occupant restraint systems provided for off-road self-propelled work machines.
2016-01-14
Standard
J3061_201601
This recommended practice provides guidance on vehicle Cybersecurity and was created based off of, and expanded on from, existing practices which are being implemented or reported in industry, government and conference papers. The best practices are intended to be flexible, pragmatic, and adaptable in their further application to the vehicle industry as well as to other cyber-physical vehicle systems (e.g., commercial and military vehicles, trucks, busses). Other proprietary Cybersecurity development processes and standards may have been established to support a specific manufacturer’s development processes, and may not be comprehensively represented in this document, however, information contained in this document may help refine existing in-house processes, methods, etc. This recommended practice establishes a set of high-level guiding principles for Cybersecurity as it relates to cyber-physical vehicle systems.
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