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Telescopic Rear Wiper Arm with Cam and Roller Mechanism for Increased Wiping Area

Hyundai Motor India Engineering Pvt Ltd.-Venkata Aravind Masimukku, Karthik MSVS
  • Technical Paper
  • 2019-28-2407
To be published on 2019-11-21 by SAE International in United States
All round visibility is critical for safety of vehicle and road users. A vehicle must be designed in such a way that the driver encounters minimal hindrance for visibility of vehicle surroundings. This is even more essential during poor visibility conditions like during rain, snow, heavy fog etc. At present, wiper systems play an essential role in providing better visibility. There are other technological aides like cameras, sensors etc., but they must be considered as secondary systems, the must not be relied upon. Current wiper systems for front windscreen are very efficient, in terms of wiping area. But the wiper systems for rear windscreen are starkly opposite. The rear wiper arm length is very low, mainly due to low height of rear windscreen. This combined with the motion of wiper arm in an arc, results in low wiping area, leading to poor visibility through rear mirror. This paper addresses this problem with a simple solution - Telescopic Wiper Arm with Cam and Roller Mechanism. This mechanism can be divided into two parts. First is the…

Smart, Hybrid Actuators Combine Nanometer Precision, Large Forces, and Long Travel Ranges with High Dynamics

  • Magazine Article
  • TBMG-35290
Published 2019-10-01 by Tech Briefs Media Group in United States

The characteristics of hybrid drives present a practical solution when a position needs to be detected with high precision and moved repeatedly over long travel ranges, or when a target position needs to be reached with nanometer precision. Application areas include precision movement of telescopes, microscopy, surface inspection, semiconductor manufacturing, and laser technology.

Revolutionary Camera Allows Scientists to Predict Evolution of Ancient Stars

  • Magazine Article
  • TBMG-34775
Published 2019-07-01 by Tech Briefs Media Group in United States

Scientists at the University of Sheffield have been working with HiPERCAM, a high-speed, multicolor camera, which is capable of taking more than 1,000 images per second, allowing experts to measure both the mass and the radius of a cool subdwarf star for the first time.

The Teletenna — a Hybrid Telescope Antenna System

  • Magazine Article
  • TBMG-34178
Published 2019-04-01 by Tech Briefs Media Group in United States

Innovators at NASA’s Glenn Research Center have developed a hybrid telescope antenna system — Teletenna — to deliver high-data-rate communication over great distances. Teletenna has the potential to benefit deep space missions and communications on Earth. By combining two very different communications systems — optics and radio frequency (RF) — Teletenna capitalizes on the benefits of each system while overcoming conflicting engineering requirements.

Keck Telescopes Get a Motion Control Upgrade

  • Magazine Article
  • TBMG-34118
Published 2019-04-01 by Tech Briefs Media Group in United States

In the middle of the Pacific Ocean, Hawaii Island is surrounded by thousands of miles of thermally stable seas. The 13,796-foot Maunakea mountain summit has no nearby ranges to roil the upper atmosphere, and for most of the year, this atmosphere is clear, calm, and dry, enabling the W. M. Keck Observatory, with its twin 10-meter-mirror telescopes, to observe our galaxy and beyond at levels special to it since opening in the early 1990s. Now, after the completion of a significant nine-year motion control upgrade project, the Keck Observatory telescopes, each standing 30 meters (almost 100 feet) tall, are offering data and observations with new and impressive nanometer precision. And all changes were made without experiencing any downtime on either telescope.

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Assembly 4.0 - Flexibly Picked Up, Precisely Mounted

SAE International Journal of Advances and Current Practices in Mobility

German Aerospace Center DLR-Matthias Bock, Markus Kleineberg
  • Journal Article
  • 2019-01-1355
Published 2019-03-19 by SAE International in United States
Component deviations between as-designed and as-built as a result of deformations in the production process lead to significant cost increasing during assembly. After quality inspection, components are provisionally preassembled to determine their matching accuracy. Components with an acceptable tolerance range are then assembled. Otherwise costly reworks are required. Subsequently, the preassembly process is repeated until acceptable assembly tolerances are achieved. To avoid this time-consuming and costly process loop, a flexible mounting frame coupled with a real-time measuring system is used to optimize the assembly process. The flexible mounting frame can be applied for many applications where components are to be aligned and mounted. This flexible mounting frame allows the realization of exact shape and acceptable position tolerances.The mounting frame consists of telescopic carbon fiber reinforced polymer (CFRP) tubes, linear actuators and suctions grippers. Linear actuators deform the component in the elastic range. Connected vacuum suction grippers hold the component securely to the mounting frame. The individually configurable joining device compensates manufacturing deviations during assembly in the elastic range. This is realized through a real time…
This content contains downloadable datasets
Annotation ability available

Precision Low-Speed Motor Controller

  • Magazine Article
  • TBMG-33906
Published 2019-03-01 by Tech Briefs Media Group in United States

Innovators at NASA Johnson Space Center have developed a method for controlling precise motion of a brushless DC (BLDC) motor using relatively inexpensive components. Precision motors are usually quite expensive and inefficient when operating at slow speeds. Current motors are only capable of operating at approximately 15 rpm with a risk of excessive jitters. The new technology uses a method to control BLDC motors over a broad range of speeds, ranging from about 0.025 rpm to about 7000 rpm.

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Telescopic Boom Length Indicating System

Cranes and Lifting Devices Committee
  • Ground Vehicle Standard
  • J1180_201902
  • Current
Published 2019-02-15 by SAE International in United States
This SAE Recommended Practice applies to mobile cranes when used in lifting crane service which are equipped with boom length indicating devices.
Annotation ability available

Unique Lift System Enables Installation and Servicing of Large Telescope Mirrors

  • Magazine Article
  • TBMG-33081
Published 2018-10-01 by Tech Briefs Media Group in United States

The Large Synoptic Survey Telescope (LSST), under construction atop 8,737-foot El Peñón peak in northern Chile, is a partnership project of the National Science Foundation (NSF) and the Department of Energy (DOE). The goal of the LSST, scheduled to be fully operational in 2022, is to conduct a ten-year survey that will deliver a 200-petabyte set of images and data addressing some of the most pressing questions about the structure and evolution of the universe and the objects within it. The LSST will conduct a deep survey over an enormous area of sky and do it with a frequency that enables images of every part of the visible sky to be obtained every few nights. This mode will continue for ten years to achieve astronomical catalogs thousands of times larger than have been previously compiled.

NASA at 60: 1958-2018 Decades of Discovery

  • Magazine Article
  • TBMG-33099
Published 2018-10-01 by Tech Briefs Media Group in United States

For six decades, NASA has led the peaceful exploration of space, making discoveries about our planet, our solar system, and our universe. At home, NASA research has made great advances in aviation, helped to develop a commercial space industry, enrich our economy, create jobs, and strengthen national security. Here is just some of what NASA has achieved in its first 60 years.