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Quantification of Linear Approximation Error for Model Predictive Control of Spark Ignited Turbocharged Engines

Rohit Koli
Clemson Univ-Daniel Egan
  • Technical Paper
  • 2019-24-0014
To be published on 2019-08-15 by SAE International in United States
Modern turbocharged spark-ignition engines are being equipped with an increasing number of control actuators to simultaneously meet fuel economy, emissions and performance targets. The response time variations between a given set of engine control actuators tends to be significant during transients and necessitate highly complex actuator scheduling routines. Model Predictive Control (MPC) algorithms have the potential to significantly reduce calibration and control tuning efforts as compared to current methodologies that are designed around integration of multiple single-input single-output sub-system controllers. MPC systems simultaneously generate all actuator responses by using a combination of current engine conditions and optimization of a control-oriented plant model. To achieve real-time control the engine model and optimization processes must be computationally efficient without sacrificing effectiveness. Most MPC systems intended for real-time control utilize a linearized model that can be quickly evaluated using a sub-optimal optimization methodology. Online linearization of the engine model is computationally expensive so it should be performed as infrequently as possible. Since engine dynamics are non-linear, a local linearity approximation error occurs during this process. This research presents…
 
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INSTALLING AND REMOVAL TOOLS, CONNECTOR ELECTRICAL CONTACT, TYPE I, CLASS 1, COMPOSITION A

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS81969/33
  • Current
Published 2019-06-14 by SAE International in United States
No Abstract Available.
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INSTALLING AND REMOVAL TOOLS, CONNECTOR ELECTRICAL CONTACT, TYPE II, CLASS 1, COMPOSITION A (FOR MIL-DTL-28840 CONNECTORS)

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS81969/34
  • Current
Published 2019-06-14 by SAE International in United States
No Abstract Available.
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TERMINATION, SOLDER STYLE, INSULATED, HEAT-SHRINKABLE, ENVIRONMENT RESISTANT WITH MULTIPLE OPENING SEALANT, 150 °C AND 200 °C

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS83519/4
  • Current
Published 2019-06-13 by SAE International in United States
No Abstract Available.
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Radius-of-Load or Boom Angle Indicating Systems

Cranes and Lifting Devices Committee
  • Ground Vehicle Standard
  • J375_201906
  • Current
Published 2019-06-10 by SAE International in United States
This SAE Recommended Practice applies to cranes used in lifting-crane service which are equipped with radius-of-load or boom angle indicating devices.
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Load Indicating Devices in Lifting Crane Service

Cranes and Lifting Devices Committee
  • Ground Vehicle Standard
  • J376_201906
  • Current
Published 2019-06-10 by SAE International in United States
This SAE Recommended Practice applies to cranes equipped with load indicating devices used in lifting crane service.
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PACKING, PREFORMED - MS28775 O-RING

A-6C2 Seals Committee
  • Aerospace Standard
  • AS28775A
  • Current
Published 2019-06-03 by SAE International in United States
No Abstract Available.
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Gear Bearings

  • Magazine Article
  • TBMG-34578
Published 2019-06-01 by Tech Briefs Media Group in United States

NASA Goddard Space Flight Center developed gear bearing technology that combines gear and bearing functions into a single unit that significantly improves gear drives for electrical, internal combustion, and turbine motors. The gear bearing design incorporates rifle-true anti-backlash, improved thrust bearing performance, and phase-tuning techniques for superior low-speed reduction. Because it combines gear and bearing functions, it reduces weight, number of parts, size, and cost, while also increasing load capacity and performance.

 
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CIRCUIT BREAKER, AIRCRAFT, TRIP-FREE PUSH PULL, TYPE I, DUAL SAFETY, −55 THRU +121 °C

AE-8B Protective and Control Devices
  • Aerospace Standard
  • AS58091/1A
  • Current
Published 2019-05-31 by SAE International in United States
No Abstract Available.
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Heat Treatment of Steel Raw Materials

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMSH6875B
  • Current
Published 2019-05-29 by SAE International in United States
This specification covers the requirements for heat-treatment of four classes of steel (See 1.2) and the requirements for furnace equipment, test procedures and information for heat-treating procedures, heat-treating temperatures and material (See 6.3) test procedures. This specification is applicable only to the heat treatment of raw material (See 6.3.1); it does not cover the requirements for the heat treatment of steel parts (See 3.4 and 6.3.2). This specification also describes procedures that, when followed, will produce the desired properties and material qualities within the limitations of the respective alloys tabulated in Tables 1A, 1B, 1C and 1D. Alloys other than those specifically covered herein may be heat treated using all applicable requirements of this specification.
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