Shadow analysis

1. +x plane Local z axis CINEMA Ecliptic plane Local x axis Sun direction (a) average precession time (b) storing and consuming power Detumble Spin up Omega z=4 RPM Omega X,Y Shadow analysis Solar panels model Magnetometer model gravity torque effects Data space of Magnetic field and the Sun Sun Sensor model Ground station (c) Settling Time vs. Initial Deviation (d) omega vector Battery model Timer Orbit dynamics Decode sensor module Serial port send module Sun sensors Albedo module Control logic light Solar panels +x plane Gravity disturbance Exception module 42o 5o Serial port send module Attitude dynamics from SimMechanics ( f) power of the albedo per unit area (e) solar panels and sun sensors Attitude estimator Actuator model * Graduate Student Researcher, Department of Mechanical Engineering, University of California, Berkeley † Professor, Department of Mechanical Engineering, University of California, Berkeley ‡ Principal Dev. Engineer, Space Sciences Laboratory, University of California, Berkeley