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Hierarchical Predictive Control of a Combined Engine/SCR System with Limited Model Knowledge

SAE International Journal of Engines

Friedrich-Alexander University Erlangen Nuremberg, Germany-Knut Graichen
MTU Friedrichshafen, Germany-Jens Niemeyer, Jörg Remele
  • Journal Article
  • 03-13-02-0015
Published 2020-01-16 by SAE International in United States
In this article, the problem of minimizing the overall operational cost of a heavy-duty off-highway diesel engine combined with a selective catalytic reduction (SCR) catalyst is considered. Here, we propose a hierarchical model-based scheme described as an optimal control problem. The sequence of resulting optimal control values are setpoints for the underlying engine controller, applied in a model predictive control (MPC) fashion. The presented scheme meets several demands. While minimizing the overall costs, it handles box constraints for the control variables as well as a nonlinear NOx-conversion rate constraint ensuring that a given emission target is met. The approach makes use of Gaussian process models for the input-output behavior of the underlying components and a technique for online adaptation. Thus, the presented hierarchical scheme is able to compensate model uncertainties and aging effects of engine, air path, and SCR catalyst. Moreover, in comparison to the literature, our approach doesn’t require detailed models of the underlying components, and the hierarchical, modular design allows the applicability to different engines and SCR controllers. We illustrate the proposed approach…
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Component Nomenclature - Articulated Log Skidder, Rubber-Tired

MTC4, Forestry and Logging Equipment
  • Ground Vehicle Standard
  • J1109_201912
  • Current
Published 2019-12-04 by SAE International in United States

This SAE Standard includes names of major components and parts particular to this type of machine.

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Off-Road Tire and Rim Selection and Application

MTC8, Tire and Rim
  • Ground Vehicle Standard
  • J1315_201911
  • Current
Published 2019-11-20 by SAE International in United States
This SAE Standard provides general guidelines for the proper selection and application of off-road tires and rims, as defined in SAE J751 and applied to earthmoving machines described in SAE J1116 and ISO 6165.
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Guarding of Starter System Energization

OPTC1, Personnel Protection (General)
  • Ground Vehicle Standard
  • J1493_201908
  • Current
Published 2019-08-08 by SAE International in United States
This SAE Standard describes guarding to help prevent hazardous machine movement caused by activation of the starter motor by bypassing the starter control system. This document is applicable to off-road, self-propelled work machines, as identified in SAE J1116, and agricultural tractors, as defined in ANSI/ASAE S390, which have the potential for hazardous machine movement as a result of bypassing the starter control system and powering of the starter motor.
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CHANGE IS AFOOT

SAE Truck & Off-Highway Engineering: August 2019

Ryan Gehm
  • Magazine Article
  • 19TOFHP08_05
Published 2019-08-01 by SAE International in United States

Cummins and its CTO help focus the 2019 SAE COMVEC on the fast-shifting technology landscape that faces both on- and off-highway sectors.

Jennifer Rumsey has been a member of SAE International her entire career and has participated in the organization's COMVEC event as an attendee and occasional panelist for well over a decade. Now, as Vice President and Chief Technical Officer at Cummins Inc., her role in the annual affair has been elevated, providing executive leadership for this year's programming and presenting an opening-day keynote presentation, along with her Cummins colleague Rich Freeland, President and Chief Operations Officer.

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Steering for Off-Road, Rubber-Tired Machines

OPTC1, Personnel Protection (General)
  • Ground Vehicle Standard
  • J1511_201907
  • Current
Published 2019-07-29 by SAE International in United States

This SAE Standard applies to off-road rubber-tired machines having rated speed capability exceeding 20 km/h.

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SAE Truck & Off-Highway Engineering: June 2019

  • Magazine Issue
  • 19TOFHP06
Published 2019-06-01 by SAE International in United States
Bullish on biomethane The CEO of CNH Industrial says biomethane is cleaner path than electric, as Case demos the alt fuel in cool wheel-loader concept.Unique hybrids required Power systems expert at Perkins stresses that on-highway electric solutions cannot be directly applied to the more-rugged and varied applications in off-highway.Getting driverless trucks onto roadways Autonomous developers at TuSimple address many technical issues, but they also must consider regulations and operating modes.Stronger, quieter cabs Worthington expert sees AHSS and active noise cancellation making off-highway cabs safer and less-stressful places to work.Hydrogen boom! Nikola reveals Two and Tre fuel-cell trucks and its H2 fueling roadmap, as well as battery-electric military and powersports vehicles.Rearview cameras come into sight Momentum is building behind replacing mirrors with camera monitor systems as the technology edges closer to regulatory approval.Supplier Directory Complete listing of industry suppliers categorized by technology area.Editorial Diesel's doing just fine, thank you.Achieving better power management by optimizing thermal managementSecurity, bandwidth drive over-the-air developmentSAE launches Office of AutomationCleaner Trucks Initiative starts NOx-reduction journeyJCB adds three new X Series crawler excavatorsToyota's…
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Electrical Charging Systems for Off-Road Work Machines

CTTC C2, Electrical Components and Systems
  • Ground Vehicle Standard
  • J180_201905
  • Current
Published 2019-05-10 by SAE International in United States
This SAE standard describes alternator physical, performance, and application requirements for heavy-duty electrical charging systems for off-road work machines, including those defined in SAE J1116.
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Product Identification Numbering System of Off-Road Work Machines

MTC1, Loaders, Crawlers, Scrapers and Mounted Attachments
  • Ground Vehicle Standard
  • J1360_201905
  • Current
Published 2019-05-10 by SAE International in United States
This standard covers self-propelled off-road work machines as categorized in SAE J1116 and Agricultural Tractors as defined in ANSI/ASAE S390.
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SAE Truck & Off-Highway Engineering: April 2019

  • Magazine Issue
  • 19TOFHP04
Published 2019-04-04 by SAE International in United States
Connections dig deeper More aspects of vehicle operation are being improved by leveraging cellular links.An OBE for the SAE Meet Paul Mascarenas-SAE International's 2019 president. He's a staunch advocate for professional development for engineers, amid the mobility industry's transformation.Advancing aftertreatment Engineers push for more efficient, cost-effective, and smaller aftertreatment systems for off-highway diesel engines, addressing challenges such as better particulate filtering and low-temp NOx conversion.Developing for defense Suppliers to the commercial vehicle segment optimize-read: ruggedize-their product offerings for the tougher terrain encountered by military vehicles.Going digital & electric @ bauma 2019 Digitalization and electrification are dominant themes in the equipment and technology being revealed at this year's largest trade show for construction and mining.Editorial Bigger barrier to CBEVs: Batteries or infrastructure?MELD exploits plastic deformation of metals with non-melt AM processStreamlined HMIs do more with lessGasoline fuels growing number of commercial vehiclesAI, standards are transforming military boards and modulesFord develops F-600 chassis truck to hit 'sweet spot'2019 Ram Chassis Cab: More capability, more driver-assist techQ&A Freudenberg CEO Claus Moehlenkamp turns focus to batteries, fuel-cell stacks