Vibration control method for artificial satellite vibration test

A method of controlling vibration in an artificial satellite vibration test by using a controller and a plurality of shakers installed on an artificial satellite and configured to vibrate at a predetermined frequency, the method comprising:

• providing the artificial satellite having the controller and the plurality of shakers for controlling vibration in the artificial satellite vibration test;
• performing a pre-test operation in which the controller sets the artificial satellite as a system and calculates a plurality of input values using a frequency response function of the system and an inverse matrix of the frequency response function;
• determining, by the controller, whether errors, which are differences between target values and a plurality of output values resulting from the plurality of input values, are within a first range;
• and
• performing, by the controller depending on results of the determination, single shaker control vibrating the artificial satellite using one of the plurality of shakers in a low frequency band, or multiple shaker control vibrating the artificial satellite using the plurality of shakers in different frequency bands, to effect feedback control;
• wherein when the errors are outside the first range, the controller performs the multiple shaker control using the plurality of shakers, and wherein before performing the multiple shaker control, the controller reduces a dimension of the frequency response function by calculating errors for combinations of the plurality of output values per predetermined frequency interval and selecting one of the combinations resulting in a minimum error.