Abstract:

To solve the problem that how to design a large-magnetic moment, small-size, light-weight, low-power consumption magnetorquer with magnetic core under the constraint of the limited volume and power in a cubesat, a multi-objective optimization design method is used. Firstly, based on the structure of the cylindrical magnetic core with multiple layers of the enamel wires, the magnetic moment model and power consumption model are deduced from the magnetic core size, enamel wire diameter and turn number, respectively. Secondly, according to the model of the magnetic moment and power consumption, the multi-objective optimization design of the magnetorquer with genetic algorithm (GA) is used under the constraint of the limited mass and volume. Thirdly, based on the relation between the magnetic moment and the magnetic induction intensity, the measurement method of the magnetic moment is designed. Finally, the designed parameters are implemented. The test results show that the designed magnetorquer has the features of high linearity and low remanence, and it will satisfy the requirements of the CubeSat standards. The successful application of the designed magnetorquer in several CubeSats indicates the effectiveness of this design scheme.

Key words: Cubesat, Magnetorquer, Multi objective optimization