Sensitivity analysis for a type of statically stable sailcrafts |
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Authors: | Zheng-Xue Li Jun-Feng Li and He-Xi Baoyin |
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Institution: | Zheng-Xue Li · Jun-Feng Li · He-Xi Baoyin School of Aerospace,Tsinghua University,100084 Beijing,China |
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Abstract: | Two types of sensitivities are proposed for statically stable sailcrafts. One type is the sensitivities of solar-radiation-pressure
force with respect to position of the center of mass, and the other type is the sensitivities of solar-radiation-pressure
force with respect to attitude. The two types of sensitivities represent how the solar-radiation-pressure force changes with
the position of mass center and the attitude. Sailcrafts with larger sensitivities undergo larger error of the solar-radiation-pressure
force, leading to larger orbit error, as demonstrated by simulation. Then as a case study, detailed formulas are derived to
calculate the sensitivities for sailcrafts with four triangular sails. According to these formulas, in order to reduce both
types of sensitivities, the angle between opposed sails should not be too large, and the center of mass should be as close
to the axis of symmetry of the four sails as possible and as far away from the center of pressure of the sailcraft as possible. |
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Keywords: | Statically stable sailcraft · Sensitivity · Solarradiation-pressure force error · Mass center and pressure center errors · Attitude and orbit errors |
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