Given a cylindrically shaped space vehicle (D = 1m, height is 0.7 m, average density is 1.1 g/cm3) with a flat solar cell panel on an arm (mass of 32 kg, effective moment arm is 1.5 m, effective average area facing normally toward sun is 0.6 m2) in a set of essentially frictionless bearings and in a low circular orbit at 160 km altitude with sunlight being received, on the average, about 54% of the time. The top surface of the cylinder and the surface of the solar have solar cells. The satellite is maneuvered so that these two surfaces are always perpendicular to the sun’s rays. The articulated arm between the cylinder and the solar panel is small and its mass and force, due to solar radiation pressure, are also small and can be neglected.
(a) Compute the maximum solar pressure-caused torque and the angular displacement this would cause during 1 day if not corrected.
(b) Using the data from the atmospheric table in Appendix 2 and an arbitrary average drag coefficient of 1.0 for both the body and the flat plate, compute the drag force and torque.
(c) Using stored high-pressure air at 14 × 106 N/m2 initial pressure as the propellant for attitude control, design an attitude control system to periodically correct for these two disturbances (F, Is, t,It , etc.).
Kris Lee, the owner and manager of the Quality Hard-ware Store, is reassessing his inventory policy for hammers. Hesells an average of 50 hammers per month, so he has bee...Aug 10 2020
CVP Analysis; Commissions; Ethics Lionel Corporation manufactures pharmaceutical products sold through a network of sales agents in the United States and Canada. The agen...Sep 10 2020
What is the difference between economies of scale and diseconomies of scale?May 10 2021
construct a scatterplot and identify the mathematical model that best fits the given data. Assume that the model is to be used only for the scope of the given data, and c...May 30 2021
In each of the eight situations below, determine how the price elasticities most likely compare to each other. a. The demand for a good with many close substitutes will ...Apr 26 2021
Class Project) According to Burton G. Malkiel, the daily changes in the closing price of stock follow a random walk—that is, these daily events are independent of each ot...Jun 20 2020
(Responsibility report; performance evaluation) Swimmingly Corp. buys raw fish, cooks and processes it, and then cans it in single-portion containers. The canned fish is ...Jun 24 2020
CONSTANT GROWTH VALUATION Harrison Clothiers’ stock currently sells for $17.00 a share. It just paid a dividend of $1.00 a share (that is, D0 = $1.00). The dividend is ex...Apr 10 2020
Two doctors had a dispute over who was doing how much work at their clinic. Their dispute was submitted to arbitration and the arbitrator held in favor of the less experi...Aug 01 2021
what types of planning do you do in your personal life?Describe these plans in terms of being strategic or operational,short term or long term, specific or directional an...May 09 2020