Derivation of Random Vibration Test Specification for Control Moment Gyro Components

Random vibration testing is a type of vibration test that can help verify the structure design, components, and integrity of flight equipment. To verify the components of control moment gyro (CMG) on random vibration environment, an appropriate power spectral density (PSD) profile should be defined for each component. The purpose of this study was to derive a PSD profile for each component of CMG, such as motor, encoder, bearing and slipring. This paper describes the step-by-step process on how the test PSD profile was derived for each component.