The Entry Descent and Landing Instrumentation (MEDLI2) Suite for the Mars 2020 Mission

White, Todd ; Mahzari, Milad ; Tang, Chun ; Karlgaard, Chris D ; Schoenenberger, Mark ; Cruden, Brett A

关键词: MARS MISSIONS;    HEAT SHIELDING;    ATMOSPHERIC ENTRY;    HYPERSONIC FLOW;    PRESSURE SENSORS;   

RP-ID  :  ARC-E-DAA-TN70708

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

This presentation will discuss the current state of each of the main measurements systems for MEDLI2. The first system is a network of pressure transducers, the Mars Entry Atmospheric Data System (MEADS). Improving upon MEDLI, separate MEDLI2 pressure transducers span the measurement range suitable for both hypersonic and supersonic flows. The MEADS will also measure pressure on the backshell of the vehicle to better characterize the contribution of backshell pressure on the overall forces and moments on the entry probe. The second system is the thermal instrumentation, or Mars Instrumented Sensor Plugs. This system includes a network of high-temperature thermocouples embedded in the thermal protection system across the heatshield and backshell. The MISP also includes two types of sensors for directly measuring incident heatflux on the backshell of the vehicle. In addition, a radiometer is included on the backshell to measure radiative heating. The presentation will also cover the current state of the MEDLI2 hardware, expected environments that will be measured, and data analysis techniques being developed to infer vehicle entry performance from both the MISP and MEADS sensor systems.