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Low-Level Control of Hybrid Hydromechanical Transmissions for Heavy Mobile Working Machines

Author

Listed:
  • L. Viktor Larsson

    (Department of Management and Engineering, Linköping University, 581 83 Linköping, Sweden)

  • Liselott Ericson

    (Department of Management and Engineering, Linköping University, 581 83 Linköping, Sweden)

  • Karl Uebel

    (Driveline Systems, Volvo Construction Equipment, 631 85 Eskilstuna, Sweden)

  • Petter Krus

    (Department of Management and Engineering, Linköping University, 581 83 Linköping, Sweden)

Abstract

Fuel efficiency has become an increasingly important property of heavy mobile working machines. As a result, Hybrid Hydromechanical Transmissions (HMTs) are often considered for the propulsion of these vehicles. The introduction of hybrid HMTs does, however, come with a number of control-related challenges. To date, a great focus in the literature has been on high-level control aspects, concerning optimal utilization of the energy storage medium. In contrast, the main topic of this article is low-level control, with the focus on dynamic response and the ability to realize requested power flows accurately. A static decoupled Multiple-Input-Multiple-Output (MIMO) control strategy, based on a linear model of a general hybrid HMT, is proposed. The strategy is compared to a baseline approach in Hardware-In-the-Loop (HWIL) simulations of a reference wheel loader for two drive cycles. It was found that an important benefit of the decoupled control approach is that the static error caused by the system’s cross-couplings is minimized without introducing integrating elements. This feature, combined with the strategy’s general nature, motivates its use for multiple-mode transmissions in which the transmission configuration changes between the modes.

Suggested Citation

  • L. Viktor Larsson & Liselott Ericson & Karl Uebel & Petter Krus, 2019. "Low-Level Control of Hybrid Hydromechanical Transmissions for Heavy Mobile Working Machines," Energies, MDPI, vol. 12(9), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1683-:d:228182
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    References listed on IDEAS

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    1. Mohammad Ali Karbaschian & Dirk Söffker, 2014. "Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives," Energies, MDPI, vol. 7(6), pages 1-25, May.
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    Cited by:

    1. Baodi Zhang & Sheng Guo & Xin Zhang & Qicheng Xue & Lan Teng, 2020. "Adaptive Smoothing Power Following Control Strategy Based on an Optimal Efficiency Map for a Hybrid Electric Tracked Vehicle," Energies, MDPI, vol. 13(8), pages 1-25, April.

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