Maddock, Christie and Vasile, Massimiliano (2008) Extension of the proximity-quotient control law for low-thrust propulsion. In: 59th International Astronautical Congress, 2008-09-29 - 2008-10-03, Glasgow, Scotland.
In this paper, the proximity quotient control law, first developed by Petropoulos, is extended to account for both third body effects and solar radiation pressure. The perturbing effect of solar radiation pressure becomes relevant when dealing with solar sails, or large optics in space. Equations for the disturbing acceleration and disturbing potential function were derived for the perturbations, then analyzed to determine the minimum and maximum rate of changes of the Keplerian elements given the thrust vector and true anomaly of the spacecraft. These were then analytically incorporated into the Q-law feedback function. The complete mathematical derivations are presented. The extended Q-law is compared to the fully optimal control law, stemming from optimal control theory, for the same dynamical model. Two missions are used as test cases.
|Item type: ||Conference or Workshop Item (Paper)|
|ID code: ||39454|
|Keywords: ||Proximity Quotient Control Law, low-thrust propulsion , solar radiation, dynamical modelling, optimal control, Q-law, Mechanical engineering and machinery, Motor vehicles. Aeronautics. Astronautics, Aerospace Engineering, Control and Systems Engineering, Computational Mechanics, Control and Optimization|
|Subjects: ||Technology > Mechanical engineering and machinery|
Technology > Motor vehicles. Aeronautics. Astronautics
|Department: ||Faculty of Engineering > Mechanical and Aerospace Engineering|
|Related URLs: |
|Depositing user: ||Pure Administrator|
|Date Deposited: ||30 Apr 2012 14:45|
|Last modified: ||27 Sep 2014 16:04|
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