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Control Strategy for Hybrid Electric Vehicle Based on Online Driving Pattern Classification

SAE International Journal of Alternative Powertrains

University of Alabama, USA-Zhengyu Yao, Hwan-Sik Yoon
  • Journal Article
  • 08-08-02-0006
Published 2019-12-04 by SAE International in United States
Hybrid Electric Vehicles (HEVs) are gaining popularity these days mainly due to their high fuel economy. While conventional HEV controllers can be classified into rule-based control and optimization-based control, most of the production vehicles employ rule-based control due to their reliability. However, once the rule is optimized for a given driving pattern, it is not necessarily optimal for other driving patterns. In order to further improve fuel economy for HEVs, this article investigates the feasibility of optimizing control algorithm for different driving patterns so that the vehicle maintains a high level of optimality regardless of the driving patterns. For this purpose, a two-level supervisory control algorithm is developed where the top-level algorithm classifies the current driving pattern to select optimal control parameters, and the lower level algorithm controls the vehicle power flow using the selected control parameters in a similar way to conventional supervisory controllers. To study the effectiveness of the proposed algorithm, a HEV model with a rule-based control algorithm is modified such that the control parameters are optimized for different driving patterns, and…
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Precision Low-Speed Motor Controller

  • Magazine Article
  • TBMG-35613
Published 2019-12-01 by Tech Briefs Media Group in United States

Precision motors are usually quite expensive and inefficient when operating at slow speeds. A method was developed for controlling precise motion of a brushless DC (BLDC) motor using relatively inexpensive components.

Optical Neural Network Could Lead to Intelligent Cameras

  • Magazine Article
  • TBMG-35479
Published 2019-11-01 by Tech Briefs Media Group in United States

UCLA engineers have made major improvements on their design of an optical neural network — a device inspired by how the human brain works — that can identify objects or process information at the speed of light. The development could lead to intelligent camera systems that figure out what they are seeing simply by the patterns of light that run through a 3D engineered material structure. The new design takes advantage of the parallelization and scalability of optical-based computational systems.

Avoiding Electrical Damage with Conductive Lubrication

  • Magazine Article
  • TBMG-35293
Published 2019-10-01 by Tech Briefs Media Group in United States

At present, 12 volts are required to provide automotive electronic systems — which include vehicle lights, air conditioning, and radio — with sufficient electrical power. With each passing year, new cars get more complicated and high-tech. Additional features such as stop-start motors, hybrid motors, and turbochargers will allow for better fuel economy but will also demand more battery power.

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Development of Dynamics Analysis Methodology for Front Loading Design Process of “Motor on Caliper”

Mando Brake-Jinsuk Song
Published 2019-09-15 by SAE International in United States
The current mega trend in the automobile industry are that of electronic systems. Amid this trend, the demand is also increasing for motorized conventional chassis products. As a result, we will be dealing with more complex designs and validations than conventional mechanical products.On the other hand, another issue in the industry is using simulation for front load design decisions. The concept of “Front Loading” is not entirely new to automotive manufacturers, who are becoming adept at eliminating cost, materials, time and waste from the design process. However, front loading is still needed in all units, and the simulation across the system is immature as ever.In this paper, we would like to show how to implement a more efficient design process by using simulation for front loading to new concept design of “Crossed Helical Gear Type - Motor on Caliper”. Also, it contains the simulation techniques and the fundamental methods studied to build this design process.
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EDITORIAL: There is no substitute for ‘Automotive Grade’

Automotive Engineering: September 2019

Editor-in-Chief-Lindsay Brooke
  • Magazine Article
  • 19AUTP09_05
Published 2019-09-01 by SAE International in United States

When you get in a vehicle and push the ‘start’ button, you're betting that the machine will get you to your destination safely and reliably, regardless of the driving conditions. Lives are at stake the moment you lift off the brake pedal.

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Facility Focus: Georgia Tech Research Institute

  • Magazine Article
  • TBMG-35142
Published 2019-09-01 by Tech Briefs Media Group in United States

The Georgia Tech Research Institute (GTRI) is the nonprofit applied research division of the Georgia Institute of Technology (Georgia Tech) in Atlanta, GA. Founded in 1934 as the Engineering Experiment Station, GTRI supports eight laboratories in more than 20 locations around the country and performs more than $370 million of research annually for government and industry.

Using Laser Metal Printing to Cool Computer Chips

  • Magazine Article
  • TBMG-34595
Published 2019-06-01 by Tech Briefs Media Group in United States

Traditionally, electronics are cooled using a heat sink that transfers the heat generated by the electronic system into the air or a liquid coolant. For the heat sink to work, it has to be attached to the CPU or the graphics processor via a thermal interface material such as thermal paste. It helps facilitate the transfer of heat by bridging microscopic gaps between the heat sink and the chip.

Self-Powered Wearable Tech

  • Magazine Article
  • TBMG-34560
Published 2019-06-01 by Tech Briefs Media Group in United States

Researchers have created highly stretchable supercapacitors for powering wearable electronics. The newly developed supercapacitor has demonstrated solid performance and stability, even when it is stretched to 800 percent of its original size for thousands of stretching/relaxing cycles.

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General Motors UART Serial Data Communications

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2740_201905
  • Current
Published 2019-05-20 by SAE International in United States
This Technical Information Report defines the General Motors UART Serial Data Communications Bus, commonly referred to as GM UART. This document should be used in conjunction with SAE J2534-2 in order to enhance an SAE J2534 interface to also provide the capability to program ECUs with GM UART. SAE J2534-1 includes requirements for an interface that can be used to program certain emission-related Electronic Control Units (ECUs) as required by U.S. regulations, and SAE J2534-2 defines enhanced functionality required to program additional ECUs not mandated by current U.S. regulations. The purpose of this document is to specify the requirements necessary to implement GM UART in an enhanced SAE J2534 interface intended for use by independent automotive service facilities to program GM UART ECUs in General Motors vehicles.
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