Development Of The Hardware-in-loop Simulation Platform For Marine Dual-fuel Engine

With the advantages of low emission,low fuel consumption and flexibility of fuel,marine dual-fuel engines become the hottest topic in the field of shipbuilding.One of the difficulties of the development for marine dual-fuel engine is the control strategy.Traditional development mode of control system must be based on a real machine test with a series of issues,like long development cycle,high test cost and strong damage.HIL simulation technology can help to verify the functions of control system under the background that the real machine is not made out yet.According to the working principle and the structure of the dual-fuel engine,a HIL simulation platform for marine dual-fuel engine of type ACD320 DF is developed based on ETAS LabCAR HIL system to provide a test environment for developing the control system.The main contents and conclusions of this paper are listed below:(1)According to the purpose for this paper,the zero-dimensional combustion model and volume method are chosen to establish the numerical model of marine dual-fuel engine.The difference of the modelling progress between the dual fuel engine and the conventional diesel engine is distinguished,and a real-time simulation model of ACD320 DF dual-fuel engine is established on AVL BOOST RT based on the numerical model.The accuracy of the transient scenario simulation results are verified by compared with the third-party design calculation report,and the response capacity of the real-time simulation model is also verified with the quantitative real-time factor under different conditions of changing load and switching mode.(2)Based on the hardware and software platform of ETAS LabCAR,the HIL simulation platform for dual-fuel marine engine is consisted of real controller,virtul engine and monitor PC.The signal connection between the controller and the real-time model is configured with LabCAR Operator-IP software.And all the sensor signals and control signals are ensured to be connected via hardware port.Then the real-time model is compiled into real-time code which the LabCAR RTPC operating system can recognize.The display interface of status parameter of the HIL simulation platform for dual-fuel marine engine is developed to monitor on the PC with LabCAR Operator-EE software.(3)Based on the HIL simulation platform for marine dual-fuel engine differentexperimental programs are designed to verify the platform can provide real test environment,including conducting diesel mode,gas mode and switch test between the two modes with Flex-ECU and speed governor.Then diesel model experiment is conducted with the self-developed controller of NI CompactRIO,to verify the HIL simulation platform for marine dual-fuel engine can be applied to different controllers.The progress of establishing the dual-fuel engine,the development of and the verification of the platform are carried out in this paper.Finally the research results prove that the HIL simulation platform can provide debugging and calibration platform environment for the development of marine dual-fuel engine control system.