Research on micro-vibration control method based on inertial actuator dynamics characteristics

Abstract

To meet the requirements for imaging quality and system stability, the mitigation of multi-spectral disturbances generated by onboard equipment, such as cryocoolers, has emerged as a critical challenge. To address this issue, this paper proposes a closed-loop iterative vibration control method based on the frequency response function. By leveraging the output characteristics of the designed inertial actuator, the method effectively suppresses vibrations at single-point and multi-point locations. Experimental results demonstrate that when the desired vibration attenuation rate is below 50%, the control error of the proposed method remains within 7%. However, because of residual disturbances and measurement errors in the frequency response function, the control error increases with higher desired vibration attenuation rates. When complete suppression of disturbances is attempted, the control error rises to approximately 26%. Analysis of these results confirms that the proposed method achieves high control accuracy and effective vibration suppression in addressing multi-spectral disturbances.