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Dynamics Team Prakhar Mehrotra Inki Choi Kevin Watts Ajay Harish Derek Chan Silas Hilliard. Receivables and Deliverables. Receivables from other teams Structural Team: M, K, C for dynamics model Metrology Team: Accuracies & tolerances; Sensor inputs that relates to observability
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Dynamics TeamPrakhar MehrotraInki ChoiKevin WattsAjay HarishDerek ChanSilas Hilliard 1
Receivables and Deliverables • Receivables from other teams • Structural Team: M, K, C for dynamics model • Metrology Team: Accuracies & tolerances; Sensor inputs that relates to observability • Receivables from JPL • Decide how to model disturbance forces • Internal (Reaction wheels) • External (Solar pressure, Drag etc) • More details on S/C configuration • Reaction wheel, Torqrod configuration and specs • Mass model comes from Structure team • Deliverables • Complete dynamic model and modal analysis • Orbital information and effect of disturbance forces • Dynamic responses in time/frequency domain • Controllability and observability of S/C • Sensitivity studies and error budget • Develop framework for determining optimal control 2
Team Objectives and Steps Outlined • TEAM OBJECTIVES • Dynamic modeling (before PDR) • Orbital dynamics (before PDR) • Altitude control (after PDR) • Stability of spacecraft about each axis – x, y and z • Error budget and sensitivity studies • Create framework to design optimal control system • STEPS OUTLINED • Obtain dynamic model • Determine orbital motion • Point mass Rigid body Flexible body • Determine attitude dynamics, controllability and observability • Dynamic analysis in time/frequency domain • Control system plan • System block diagrams 3