ENHANCED HUMS CAPABILITIES FOR IVHM

摘要

The work presented in this paper summarizes an effort to advance the state of the Health and Usage Monitoring System (HUMS) practice towards an Integrated Vehicle Health Management (IVHM) strategy. The effort seeks to integrate detection, diagnostic, and prognostic capabilities addressing subsystems from across an advanced platform and integrate this functionality into a single synergistic, embeddable commercial off-the-shelf (COTS) unit. The work presented here highlights an end-to-end approach, from data acquisition to communication of root-cause failure mode assessments made at the vehicle level.Two methods are applied to enhance the capabilities of the HUMS. First, the scope of the systems/subsystems being monitored has been expanded. The work presented examines incorporation of enhanced health monitoring modules developed from leveraged research efforts into a single advanced health and usage monitoring system. Several key areas are integrated into the final configuration: electromechanical actuators (EMAs), engine performance, structural impact, and power train vibration. Second, the individual diagnostic indications obtained from the subsystem specific modules are intelligently fused or reasoned employing a hierarchical architecture. The reasoning process is employed to ascertain the root cause failure mode in the event multiple, conflicting failure modes are identified and also determine the functional availability at the subsystem and vehicle levels. Additionally, the diagnostic and reasoning modules presented are coupled with dedicated data acquisition capabilities and embedded on a COTS PC-104+ based processing platform.