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| Research on Hardware-in-Loop Simulation Technology of In-Cylinder Pressure Closed-Loop Control for Low-Speed Marine Diesel Engines |
| DOI：10.13949/j.cnki.nrjgc.2019.05.013 |
| Key Words:marine low-speed diesel engine in-cylinder pressure feedback control real time simulation model hardware-in-loop simulation |
| Author Name | Affiliation | | YU Yonghua,SHEN Yelei,WANG Qinpeng,YANG Jianguo | 1.School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
2.Key Laboratory of Marine Power Engineering and Technology Granted by MOT, Wuhan University of Technology, Wuhan 430063, China
3.National Engineering Laboratory of Ship and Marine Engineering Power Systems, Wuhan University of Technology, Wuhan 430063, China |
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| Abstract:Taking a 6EX340EF low-speed marine diesel engine as the research object, the issue of the combustion imbalance between the cylinders and working cycles of low-speed marine diesel engines was studied using the in-cylinder pressure feedback control technology. A simulation model with pressure fluctuations between the cylinders and working cycles was developed using the AVL Cruise M software to meet accuracy and real-time requirements, and a rapid control prototype was also developed based on the NI CompactRIO hardware and NI LabVIEW software. The closed-loop adjustment of the in-cylinder pressure was accomplished by using combustion characteristic parameters as feedback variables, such as indicated mean effective pressure and 50% combustion heat release phase extracted from the pressure in cylinder through position management module and cylinder pressure acquisition analysis processing module, and injection timing and injection pulse width as control variables. Then the real-time simulation model, hardware-in-loop simulation system and control prototype were integrated to form a closed-loop system. The test results show that the proposed in-cylinder pressure feedback control strategy can reduce the pressure fluctuation by about 50%, and it has an improvement effect on the reduction of the combustion imbalance between the cylinders and working cycles. |
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