Statistics-Guided Accelerated Swarm Feature Selection in Data-Driven Soft Sensors for Hybrid Engine Performance Prediction

The accurate prediction of soft sensors is essential for development of modern combustion engines to achieve better performance, lower emissions, and reduced fuel consumption. To precisely predict engine performance i.e., indicated thermal efficiency, volumetric efficiency, and fuel consumption rate of a hybrid engine, this paper proposes a novel data-driven approach of statistics-guided accelerated swarm feature selection to find the most effective features for engine soft sensors. Differing from the existing filter or wrapper feature selection approaches, this approach uses external measure information to direct velocity updates in the accelerated swarm feature selection. Several filter and wrapper methods were developed and comprehensively compared. The experimental dataset was collected from a BYD 1.5L gasoline engine. Validated by bench test, the results demonstrate that the proposed approach finds the most effective features and optimal network structure for data-driven performance prediction of the hybrid engine that was studied.