Systems Engineering Seminar

Presented by:
Alice Liu, Code 592 and Gary Mosier, Code 592

Wednesday, April 28, 2021



WebEx
Meeting number (access code): 199 105 4134
Meeting password: SES@NaSA21
415-527-5035 US Toll

Abstract:

Integrated Modeling (IM) refers to an analysis process that combines results from a set of multi-disciplinary models to generate system level performance predictions. By working through the analysis process and providing these predictions, IM plays an important role throughout the entire Mission lifecycle, including requirement flow down, architecture and design development, uncertainty and margin management, and system verification and validation. This seminar focuses on describing the IM process and associated roles from the systems engineering perspective, with consideration given to Mission Class and in-house versus out-of-house mission. Jitter (or micro-vibration) and Structural-Thermal-Optical Performance (STOP) reflect the two most common analyses managed by IM. We will use past and current mission examples to illustrate jitter and STOP analysis process specifics such as top-level analysis flow, state-of-the-art tools, and mitigation strategies to help systems engineers understand and manage the IM process. Finally, an ongoing, IRAD-funded effort at GSFC, seeking to broaden the scope of IM and provide improved capabilities will be described.

Biographies:

Kuo-Chia (Alice) Liu joined the NASA Goddard Space Flight Center in early 2003 and has supported numerous flight projects. She was the Jitter Lead on SDO, ACS Lead Engineer on GPM through CDR, GN&C System Engineer on Landsat-8, Pointing Lead Engineer on NICER, and jitter consultant for many other in- and out-of-house missions. She is currently the Integrated Modeling and Performance Budget Lead on the Roman Space Telescope Project. She received her B.S. and M.S. degrees in Aerospace Engineering from the University of Maryland at College Park, and Ph.D. in Estimation and Control from the Massachusetts Institute of Technology.

Gary Mosier has been at the NASA Goddard Space Flight Center since 1987, initially working as an GN&C analyst supporting the Flight Telerobotic Servicer, EUVE, HST, Goes-I, RXTE (as lead analyst), TRMM, FUSE and WMAP missions. In 1996 he became the Integrated Modeling Lead for JWST, and has led or supported IM activities for LISA, TPF-C, JDEM, and RST. He is one of the principle developers of the NASA Technical Standard for Models & Simulations, a member of the NESC Systems Analysis Technical Discipline Team, and is an active participant in agency-level strategic initiatives related to Model Based Engineering and Digital Transformation. Mr. Mosier received his B.S. and M.S degrees in Mechanical Engineering from the University of Maryland, College Park, and his M.S. degree in Electrical Engineering from the Johns Hopkins University.