【作者】

Steffen Tscherch

【摘要】

该论文已在芬兰赫尔辛基举行的第28届CIMAC大会上发表。论文的版权归CIMAC所有。Winterthur Gas & Diesel Ltd. has developed a dynamic engine model of 2-stroke diesel and dual-fuel engines. The presented dynamic engine model provides the possibility to test the complete engine control software in Hardware-inthe-Loop fashion. The engine simulator is equipped with the real hardware modules needed to control an up to twelve cylinder diesel engine or an up to six cylinder dual-fuel engine, where the actuator outputs are connected to realistic electrical loads. The simulator also emulates external systems like the remote control system and gas valve unit, which makes it possible to test the entire automation setup as installed on the ship. The objective of this article is to describe the dynamic engine model designed in Matlab Simulink and embedded in a NI-Veristand environment that executes all necessary tasks in real-time. The engine model consists of a physical common rail system with multiple pumps and injectors, a thermodynamic model of the cylinder pressure with a simplified combustion as well as a mechanical model for the load computation related to operating point and engine specific inertia. It also computes all relevant engine feedback signals in real time, such as exhaust valve position, gas admission valve position, lubrication pressure feedback, cylinder pressure and more. Regarding the utilization of the dynamic engine model, the paper will also focus on the new possible control software tests that can be performed compared to the previously used steady state test rigs. The main purpose of this engine simulator is to test the behaviour of the engine control system in normal operation as well as in emergency conditions. Typical emergency cases are malfunctions of control modules, communication buses, actuators or sensors. It is also used for testing control sequences crucial for the correct engine operation, e.g., engine starting, fuel transfer from diesel to gas operation, redundancy functionalities. Additionally it enables the possibility to test and monitor the interaction of independently controlled closed loop systems, e.g., the interaction between the fuel pressure controller and the speed controller of the engine. By using an engine simulator which is able to represent engine hardware and its dynamic behaviour it is possible to develop a more robust engine control software in much shorter time.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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