| 主权项 |
1. A method of measuring a rotating speed of a sphere, which is installed in an attitude control device to control an attitude of a satellite in three axial directions, using an accelerometer. comprising:
an accelerometer installing operation (S100) in which a pair of accelerometers is installed at each accelerometer coordinate axis including x, y, and z axes orthogonal to one another, the accelerometers being located in the sphere; an accelerometer coordinate axis aligning operation (S200) in which the accelerometer coordinate axes are aligned to allow the x, y, and z axes of the accelerometer coordinate axes to match with the X, Y, and Z axes of system coordinate axes, respectively; an acceleration measuring operation (S300) in which a current is applied to an electromagnet installed around the sphere to rotate the sphere and sequentially measure an acceleration applied to each of the accelerometer x, y, and z axes; an acceleration calculating operation (S400) in which an acceleration component of gravity is removed from the acceleration measured in the acceleration measuring operation (S300) and only the acceleration generated by rotation of the sphere is calculated; and a rotating speed calculating operation (S500) in which the rotating speed of the sphere with respect to each coordinate axis is calculated using the acceleration calculated in the acceleration calculating operation (S400). |
