A spherical satellite has 12 identical monopropellant thrust chambers for attitude

Question

control with the following performance characteristics: thrust (each unit): 5 lbf; Is
(steady state or more than 2 sec): 240 sec; Is (pulsing duration 20 msec): 150 sec;
Is (pulsing duration 100 msec): 200 sec; satellite weight: 3500 lbf; satellite diameter:
8 ft; satellite internal density distribution is essentially uniform; disturbing torques,
Y and Z axes: 0.00005 ft-lbf average; disturbing torque, for X axis: 0.001 ft-lbf
average; distance between thrust chamber axes: 8 ft; maximum allowable satellite
pointing position error: ±1◦. Time interval between pulses is 0.030 sec.
(a) What would be the maximum and minimum vehicle angular drift per hour if no
correction torque were applied?

Answer 1

good