GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • SAGE Publications  (6)
  • Song, Kang  (6)
Material
Publisher
  • SAGE Publications  (6)
Person/Organisation
Language
Years
Subjects(RVK)
  • 1
    Online Resource
    Online Resource
    Compound disturbance rejection control of spark ignition–controlled-autoignition hybrid combustion for gasoline engines
    SAGE Publications ; 2018
    In:  Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 232, No. 2 ( 2018-02), p. 264-281
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications, Vol. 232, No. 2 ( 2018-02), p. 264-281
    Abstract: Spark ignition–controlled-autoignition hybrid combustion is a promising concept because of its capability to achieve a smooth transition between spark ignition combustion and controlled-autoignition combustion, but it suffers from transient control owing to the high sensitivity to the operating conditions. In this paper, a control solution based on the principle of disturbance rejection is proposed for spark ignition–controlled-autoignition hybrid combustion. The complexity, the non-linearity and the cross-coupling inside are removed by idealizing the combustion process into three independent integrators, for the combustion timing channel, the indicated mean effective pressure channel and the λ (excessive air coefficient) channel respectively. All the other dynamics that deviate from the integrators (internal and external) are ‘lumped’ together as the total disturbance for each channel. With the total disturbance estimated in real time via the extended-state observer and eliminated by the disturbance rejection law, the enforced plant, i.e. the integrator, is controlled by a simple proportional controller. To enhance the response further, a non-linear model-inversion-based feedforward controller is added. In order to attenuate the slow time-varying disturbances, four correction factors for the model parameters are embedded in the model for online estimation. Validations by both simulations and experiments confirm the superiority of the proposed solution in terms of a fast transient response and a high robustness. By using the bandwidth-parameterization-based extended-state observer tuning method and a Kalman-filter-based extended-state observer, the controller is easy to tune, making it a promising candidate for applications of spark ignition–controlled-autoignition hybrid combustion.
    Type of Medium: Online Resource
    ISSN: 0954-4070 , 2041-2991
    URL: Article
    DOI: 10.1177/0954407017697477
    RVK:
    ZO 4200
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 1030849-0
    detail.hit.zdb_id: 2032754-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Control of diesel engines with electrically assisted turbocharging through an extended state observer based nonlinear MPC
    SAGE Publications ; 2019
    In:  Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 233, No. 2 ( 2019-02), p. 378-395
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications, Vol. 233, No. 2 ( 2019-02), p. 378-395
    Abstract: A two-layer controller for a diesel engine equipped with an electrically assisted turbocharger is proposed. A previously identified control-oriented plant model is used for control design. A GT-SUITE based high fidelity engine model is used as the plant. The high-level controller is designed based on the active disturbance rejection control method and uses an extended state observer for added robustness. The high-level controller tracks the boost pressure and intake manifold oxygen concentration. The low-level controller seeks to deliver the desired compressor power through an optimal affine split between the exhaust turbine power and the electric power. The optimal power split is determined by an optimal vane position for the variable geometry turbine. The corresponding optimization problem is solved using a nonlinear model predictive control algorithm that is adapted for fast numerical solution. Controller validation is conducted on the GT-SUITE engine model over the FTP-75 cycle. Results confirm the effectiveness the proposed control design and also illustrate engine performance benefits of an assisted turbocharging system, in terms of transient response (~70% reduction in accumulated boost pressure tracking error) and fuel economy (~4.4% reduction in brake specific fuel consumption) relative to a conventionally boosted system.
    Type of Medium: Online Resource
    ISSN: 0954-4070 , 2041-2991
    URL: Article
    DOI: 10.1177/0954407017744145
    RVK:
    ZO 4200
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 1030849-0
    detail.hit.zdb_id: 2032754-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    An assessment of the impacts of low-pressure exhaust gas recirculation on the air path of a diesel engine equipped with electrically assisted turbochargers
    SAGE Publications ; 2021
    In:  International Journal of Engine Research Vol. 22, No. 1 ( 2021-01), p. 3-21
    Details
    In: International Journal of Engine Research, SAGE Publications, Vol. 22, No. 1 ( 2021-01), p. 3-21
    Abstract: The impact of assisted boosting technologies on the ability to maintain desired exhaust gas recirculation is investigated. Regenerative electrically assisted turbocharging is a promising technique for significantly reducing turbo lag. In addition to mitigating turbo lag, assisted boosting systems also allow fuel economy benefits through reduced pumping losses. Pumping loss reduction is achieved through optimally managing the exhaust pressure via vane position (for a variable geometry turbocharger) or waste gate position (for a waste-gated fixed geometry turbocharger). The consequent loss in exhaust turbine power, from reduced exhaust pressure, is supplemented by electrical assist power. Reduced exhaust pressure and a rapid increase in intake pressure results in a pressure differential across the high-pressure exhaust gas recirculation valve that may not support exhaust gas recirculation flow demands. Hence, a natural trade-off exists between the reduction of pumping loss and the ability to meet exhaust gas recirculation demand, as dictated by prescribed constraints on engine-out emissions. Low-pressure exhaust gas recirculation offers a potential solution that may allow the desired fuel economy improvements without sacrificing the desired exhaust gas recirculation fractions in the intake charge. In this article, we consider this problem and investigate the potential benefits of using low-pressure exhaust gas recirculation for assisted boosted systems.
    Type of Medium: Online Resource
    ISSN: 1468-0874 , 2041-3149
    URL: Article
    DOI: 10.1177/1468087419854294
    RVK:
    ZG 1100
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2030603-9
    detail.hit.zdb_id: 2030240-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    An assessment of performance trade-offs in diesel engines equipped with regenerative electrically assisted turbochargers
    SAGE Publications ; 2019
    In:  International Journal of Engine Research Vol. 20, No. 5 ( 2019-06), p. 510-526
    Details
    In: International Journal of Engine Research, SAGE Publications, Vol. 20, No. 5 ( 2019-06), p. 510-526
    Abstract: The regenerative electrically assisted turbocharger offers performance benefits, such as reduced turbo-lag, over the conventional turbocharger. However, regenerative electrically assisted turbocharger introduces additional control degrees of freedom as well as new causalities in the air-path dynamics of boosted engines. This is because the electrical power applied to (or removed from) the turbocharger shaft disrupts the natural coupling between the engine exhaust, and the turbocharger operation found in conventionally boosted systems. The ideal performance objective of regenerative electrically assisted turbocharger is to achieve fast boost response with improved fuel economy and minimal impact on engine-out emissions. These performance criteria, as we show in this article, drive performance trade-offs that must be considered for optimal system performance. In this article, we investigate these trade-off relationships based on a high fidelity GT-SUITE engine model for a heavy-duty diesel engine. An optimal control law is used in conjunction with a control-oriented plant model. Results from load step tests and from the federal test cycle (FTP-75) indicate that using a properly designed optimal controller, it is possible to manage these trade-offs, and to simultaneously achieve benefits in boost response, FE as well as engine-out emissions.
    Type of Medium: Online Resource
    ISSN: 1468-0874 , 2041-3149
    URL: Article
    DOI: 10.1177/1468087418762170
    RVK:
    ZG 1100
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2030603-9
    detail.hit.zdb_id: 2030240-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Layered disturbance rejection path-following control with geometry-based feedforward for unmanned rollers
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 237, No. 6 ( 2023-05), p. 1435-1453
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications, Vol. 237, No. 6 ( 2023-05), p. 1435-1453
    Abstract: As a widely used engineering vehicle, drum rollers have a higher degree of freedom in motion than conventional passenger vehicles. The uncertainties, caused by road and vehicle condition variations, introduce severe disturbances in the path-following control of unmanned rollers. In this work, a single-drum roller is considered, for which a composite disturbance rejection controller (CDRC) is proposed for path following. The CDRC comprises a disturbance rejection controller (DRC) and a modified pure pursuit controller (MPPC). The DRC lumps all the discrepancies of the models from the roller as total disturbance, which is estimated by the extended state observer (ESO) and rejected in the feedback control loop. For enhanced performance, MPPC is added as a feedforward controller, which calculates the target articulation angle based on the roller geometry model. Compared with the DRC, the settling time of the CDRC is reduced by 12.3%, and the lateral errors are reduced by 43.1% and 39.9% in the presence of uncertainties in the positioning system and steering motor, respectively, while it still maintains a low computational cost. The proposed controller have been used in 15 unmanned rollers for 2 years, using which over 5 million square meters area has been compacted.
    Type of Medium: Online Resource
    ISSN: 0954-4070 , 2041-2991
    URL: Article
    DOI: 10.1177/09544070221087024
    RVK:
    ZO 4200
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 1030849-0
    detail.hit.zdb_id: 2032754-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    A physics-based turbocharger model for automotive diesel engine control applications
    SAGE Publications ; 2019
    In:  Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 233, No. 7 ( 2019-06), p. 1667-1686
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications, Vol. 233, No. 7 ( 2019-06), p. 1667-1686
    Abstract: Control-oriented models of turbocharger processes such as the compressor mass flow rate, the compressor power, and the variable geometry turbine power are presented. In a departure from approaches that rely on ad hoc empirical relationships and/or supplier provided performance maps, models based on turbomachinery physics and known geometries are attempted. The compressor power model is developed using Euler’s equations of turbomachinery, where the gas velocity exiting the rotor is estimated from an empirically identified correlation for the ratio between the radial and tangential components of the gas velocity. The compressor mass flow rate is modeled based on mass conservation, by approximating the compressor as an adiabatic converging-diverging nozzle with compressible fluid driven by external work input from the compressor wheel. The variable geometry turbine power is developed with Euler’s equations, where the turbine exit swirl and the gas acceleration in the vaneless space are neglected. The gas flow direction into the turbine rotor is assumed to align with the orientation of the variable geometry turbine vane. The gas exit velocity is calculated, similar to the compressor, based on an empirical model for the ratio between the turbine rotor inlet and exit velocities. A power loss model is also proposed that allows proper accounting of power transfer between the turbine and compressor. Model validation against experimental data is presented.
    Type of Medium: Online Resource
    ISSN: 0954-4070 , 2041-2991
    URL: Article
    DOI: 10.1177/0954407018770569
    RVK:
    ZO 4200
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 1030849-0
    detail.hit.zdb_id: 2032754-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...