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General Motors Technical Center India-Vijayasarathy Subramanian, Anandakumar Marappan, Biju Kumar, Masani Sivakrishna
  • Technical Paper
  • 2019-28-2525
To be published on 2019-11-21 by SAE International in United States
Shared Mobility is changing the trends in Automotive Industry and its one of the Disruptions. The current vehicle customer usage and life of components are designed majorly for personal vehicle and with factors that comprehend usage of shared vehicles. The usage pattern for customer differ between personal vehicle, shared vehicle & Taxi. In the era of Autonomous and Shared mobility systems, the customer usage and expectation is high. The vehicle needs systems that will control customer interactions (Self-Expressive) & fix the issues on their own (Self-Healing). These two systems / methods will help in increasing customer satisfaction and life of the vehicle. We will be focusing on vehicle Closure hardware & mechanisms and look for opportunities to improve product life and customer experience in ride share and shared mobility vehicles by enabling integrated designs, which will Self-Express & Self-Heal. Vehicle closures having direct human interfaces with components like closures, handle & other hardware's will be tracked for their performance parameters and usage pattern. The performance parameters will be tracked for every customer and mapped to…

Methodology for failure simulation Using 4 corner 6 DOF Road load simulator of Overhanging Components: An Experimental Approach

Maruti Suzuki India Ltd-Naveen Malik, Sahil Jindal, Sayed Zergham Ali Naqvi
Maruti Suzuki India, Ltd.-Ayan Bhattacharya
  • Technical Paper
  • 2019-28-2404
To be published on 2019-11-21 by SAE International in United States
Nowadays, Road Load Simulators are used by automobile companies to reproduce the accurate and multi axial stresses in test parts to simulate the real loading conditions. The road conditions are simulated in lab by measuring the customer usage data by sensors like Wheel Force transducers, accelerometers, displacement sensors and strain gauges on the vehicle body and suspension parts. The acquired data is simulated in lab condition by generating ‘drive file’ using the response of the above mentioned sensors. For generation of proper drive file, not only good FRF but ensuring stability of inverse FRF is also essential. Stability of the inverse FRF depends upon the simulation channels used. In this paper, an experimental approach was applied for focused failure simulation of engine mount, one of such low correlation zone, with known history of failure. Methodology was established to simulate proving ground loads on engine mount along with simulation of loads at wheel center using a 4 corner 6 DOF road load simulator. Result was verified by endurance run on test rig and matching the nature…

The Analysis of Brake Squeal Noise Related to the Friction Properties of Brake Friction Materials

Hyundai Motor Company-Sang-mok Lee, Jung Hoon Woo, Dong Won Kim
Hyundai Motor Company & KIA Motors Corporation-Younggu Cho
  • Technical Paper
  • 2019-01-2132
To be published on 2019-09-15 by SAE International in United States
The friction properties related to squeal noise was analyzed with the development histories and simplified computational method. Firstly, the development histories were investigated especially focusing on the case which the friction materials were modified to improve squeal noise occurrence. Based on the histories, the friction properties of selected friction materials were newly measured using dynamometer. The average friction coefficient levels, torque oscillations, the increment of friction coefficient during full-stop, and etc. were compared with the squeal noise occurrence, and the results showed that increase of friction properties cause production of squeal noise. The result suggested that the size of friction energy was important factors related to triggering the squeal noise. Also, the contact conditions between rotor disc and friction materials were significant factors deciding the noise occurrence. We performed simplified computational analysis using MATLAB program to prove the effect of friction energy on the noise occurrence. The friction surfaces were roughly designed and the distribution of contact plateaus was controlled to simulate different contact conditions. The different contact conditions were designed and performed sliding at…

Celebrating the 50th Anniversary of Apollo 11: On to Mars

  • Magazine Article
  • TBMG-34740
Published 2019-07-01 by Tech Briefs Media Group in United States

Just 54 years ago, the first photograph of Mars from a passing spacecraft appeared to show a hazy atmosphere. Now, decades of exploration on the planet itself has shown it to be a world that once had open water — an essential ingredient for life.


Celebrating the 50th Anniversary of Apollo 11: An Astronaut's View

  • Magazine Article
  • TBMG-34747
Published 2019-07-01 by Tech Briefs Media Group in United States

Before becoming an astronaut candidate in 1996, Mike Massimino was busy earning degrees — an undergraduate degree from Columbia University and four additional degrees from the Massachusetts Institute of Technology (MIT), including a doctorate in mechanical engineering.


Celebrating the 50th Anniversary of Apollo 11: Exploring Apollo's Impact Beyond 'One Small Step'

  • Magazine Article
  • TBMG-34763
Published 2019-07-01 by Tech Briefs Media Group in United States

On July 20, 1969, humans walked on another world for the first time in history. After a landing that included dodging a lunar crater and boulder field and almost running out of fuel just before touchdown, Neil Armstrong and Buzz Aldrin explored the area around their lunar landing site for 21 hours and 36 minutes while Michael Collins piloted the Command Module around the Moon. They collected soil and rock samples, set up experiments, planted an American flag, and left behind medallions honoring the Apollo 1 crew and a plaque saying, “We came in peace for all mankind.”


Apollo 11 History Archive Helps Virtual Reality Program Come to Life

  • Magazine Article
  • TBMG-34741
Published 2019-07-01 by Tech Briefs Media Group in United States

Spinoff is NASA’s annual publication featuring successfully commercialized NASA technology. This commercialization has contributed to the development of products and services in the fields of health and medicine, consumer goods, transportation, public safety, computer technology, and environmental resources.


Celebrating the 50th Anniversary of Apollo 11: Getting There, To a New Era of Space Exploration

  • Magazine Article
  • TBMG-34745
Published 2019-07-01 by Tech Briefs Media Group in United States

For the first time in a generation, NASA is building a human spacecraft for deep-space missions that will usher in a new era of space exploration. A series of increasingly challenging missions awaits, and this new spacecraft will take astronauts farther than they’ve gone before, including to the Moon and Mars.


Celebrating the 50th Anniversary of Apollo 11: The Next Giant Leap

  • Magazine Article
  • TBMG-34749
Published 2019-07-01 by Tech Briefs Media Group in United States

On May 25, 1961, President John F. Kennedy announced before a special joint session of Congress the dramatic and ambitious goal of sending an American safely to the Moon before the end of the decade. Kennedy felt great pressure to have the United States “catch up to and overtake” the Soviet Union in the space race.


The History of Laminated Steel

Antiphon/C&A/ AAP (retired)-Peter Jackson
General Motors (retired)-James Shedlowsky
Published 2019-06-05 by SAE International in United States
This paper discusses the background and history of “laminated steel” (commonly called “noiseless steel” or MPM). It provides the early development, where it came from, and how it was introduced to North America as a new tool for engineering acoustical solutions. A progressive timeline shows laminated steel from its earliest inception in Europe to its current role in today’s global market. Case histories along with examples of successful applications detail its important contribution in advancing the technology for component damping. Many manufacturing sources as well as end users have been impacted over the decades since it was first introduced. Some of those companies will be noted. The background information for this paper is provided by many of the individuals who were involved in the very early stages of its introduction as well those who are currently working to utilize the technology of laminated steel.
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