Research on Active Micro Vibration Control Strategy Based on Variable Step FxLMS Algorithm

The demand for in-orbit micro-vibration suppression in high-precision and high-stability spacecraft is becoming increasingly stringent. Active micro-vibration control technologies with higher accuracy are gradually being applied to high-precision and high-stability spacecraft. An active control law was implemented based on the variable step size FxLMS (VssFxLMS) algorithm. Based on engineering practice, its shortcomings in parameter identification and control delay were analyzed, and corresponding solutions were proposed. The automatic calculation and update of the variable step size were achieved based on the mean root square of the error signal, achieving adaptive adjustment of the steady-state convergence step size in the tracking and steady-state stages. Therefore, a set of active micro-vibration control strategies based on the VssFxLMS algorithm was proposed. The effectiveness of this strategy was verified through simulation, and the control effect was analyzed through optical imaging experiments.