THERMAL SCIENCE

International Scientific Journal

Jinlong Wang

,

Jin Xiao

,

Yingdong Cheng

,

Zhen Huang

COMBUSTION STABILITY CONTROL OF A SINGLE-PISTON FREE PISTON ENGINE GENERATOR

ABSTRACT
Free piston engine generator is an effective alternative to conventional range ex-tender, which is able to facilitate the transportation sector decarbonization attributed to its high thermal efficiency and ultimate fuel flexibility. However, due to the lack of crankshaft mechanism, stable and robust operation of free piston engine generator is difficult to achieve since various disturbances may exist during its operation. In this paper, a combustion stability control based on active disturbance rejection control algorithm was proposed for a single piston free piston engine generator. To develop this control, a thermodynamic model of the free piston engine generator system was calibrated and validated through experimental data. Afterward, a 2nd order active disturbance rejection control based speed control was developed by leveraging the developed free piston engine generator model. The proposed active disturbance rejection control was employed into multiple abnormal combustion scenarios through a simulation, including various fuel heat released, ignition positions and burn durations, aimed to verify the control ability of rejecting disturbances and enhancing the robustness of the free piston engine generator operation.
KEYWORDS
free piston engine generator, thermodynamic model, active disturbance rejection control, calibration and validation, speed tracking control
PAPER SUBMITTED: 2022-04-04
PAPER REVISED: 2022-05-30
PAPER ACCEPTED: 2022-06-22
PUBLISHED ONLINE: 2022-09-10
DOI REFERENCE: https://doi.org/10.2298/TSCI220404125W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 1, PAGES [233 - 244]
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Combustion stability control of a single-piston free piston engine generator

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