Method for determining sun-facing optimal fixed yaw angle of inclined orbit satellite with solar panel

Abstract

The invention discloses a method for determining a sun-facing optimal fixed yaw angle of an inclined orbit satellite with a solar panel. The method comprises the following steps: as for a given solarelevation angle lambda, taking the step length of the yaw angle theta and the step length of the solar azimuth angle as theta step according to the solving precision, marking the yaw angle and the solar azimuth angle corresponding to each step length as theta k, and as for different theta k, calculating: when lambda is greater than 0, taking a sequence point from a positive zero crossing point theta k to a negative zero crossing point theta k in a negative value interval of theta k as the solved optimal fixed yaw angle; and when lambda is less than 0, the zero crossing point theta k of the sequence points from positive to negative in the positive value interval of theta k is the solved optimal fixed yaw angle. According to the method for determining the sun-facing optimal fixed yaw angle of the inclined orbit satellite with the solar panel, the mutual influence relation between the fixed yaw angle and the operation rule of a panel driving mechanism is comprehensively considered, and finally the theoretically optimal fixed yaw angle is obtained. The satellite is matched with the solar panel driving mechanism to operate at the optimal yaw angle so that the theoretically maximum solarenergy acquisition efficiency in the mode can be realized.

Description

technical field [0001] The invention relates to the technical field of spacecraft control, in particular to a method for determining the optimal fixed yaw angle of an inclined-orbit satellite with solar panels to the sun. Background technique [0002] Inclined-orbit satellites refer to satellites with an inclination angle > 0 between the orbit of an artificial satellite orbiting the earth’s circular motion and the equator. This kind of satellite can conduct fixed-point reconnaissance of a place, and can also conduct meteorological observations at different latitudes. For a satellite with a single-degree-of-freedom solar panel, due to the change of the right ascension of the ascending node and the revolution of the earth, the angle between the sun vector and the orbital plane of the satellite changes at a large angle, resulting in a large loss of solar energy. [0003] In the prior art, in order to improve the sun-aligning performance of the solar panel, one way is that th...

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Problems solved by technology

Therefore, the current fixed yaw angle calculation method based on the assumption that the operating law of the sailboard driving mechanism is not affected by the fixed yaw angl

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