Video Information-Based Liquid Rocket Engine Fault Simulation Test Method under Complex Environment

Liquid rocket engines are fault-prone parts on launch vehicles. Due to its complex working environment and strict performance requirements, liquid rocket engines often face many kinds of failure risks during actual commissioning and operation. In view of the high risk of liquid rocket engine failure and the scarcity of abnormal video data in the actual commissioning process, the traditional fault monitoring methods are faced with many challenges. In response, this paper proposes a fault simulation testing methodology specifically for liquid rocket engines under complex interference conditions. A semi-physical model has been developed to mimic the abnormal states that liquid rocket engines may experience during debugging or operational activities. This model enables the collection and generation of a series of video data that closely resemble real-life fault scenarios, enhancing the effectiveness of fault monitoring and analysis. Finally, by comparing with the data of the actual test run, the simulation test data achieved a high degree of similarity, indicating that the designed simulation test can effectively simulate the actual physical process during the actual test run. Through the innovative fault simulation test method, this study successfully solved the problem of abnormal video data scarcity, and provided support for the research of liquid rocket engine video anomaly monitoring.