Active Vibration Isolation Method for Cold Atom Gravimeter Based on Adaptive Fuzzy Sliding Mode Control

The cold atom gravimeter is an instrument that utilizes cold atoms and laser technology to measure the Earth's gravity field. Ground vibration is a significant source of interference in this measurement, and it can affect the accuracy of the measurements. To reduce the impact of ground vibrations on the cold atom gravimeter, an effective approach is to employ active vibration isolation control methods. Active vibration isolation control involves using sensors to monitor real-time ground vibration signals and employing a controller to generate counteractive vibration signals to cancel out the interference from ground vibrations on the cold atoms. This article introduces the adaptive fuzzy control method inactive vibration isolation control. Traditional fixed-parameter control methods may not meet the requirements because the frequency and amplitude of ground vibration signals can vary at any time. Adaptive fuzzy control, on the other hand, utilizes fuzzy inference and adaptive parameter updates to adjust the controller's parameters in real-time, adapting to the changing dynamics of the system. Compared to other control methods, adaptive fuzzy control offers several advantages. It can adapt to the changes in ground vibration signals, provide better suppression effects, and exhibit good adaptability and robustness. Adaptive fuzzy control performs fuzzy inference based on real-time ground vibration signals and adjusts the controller's parameters through adaptive parameter updates, enabling more precise vibration cancellation. These characteristics make adaptive fuzzy control an ideal control method, as it can improve the measurement accuracy and stability of the cold atom gravimeter in the face of varying frequencies and amplitudes of ground vibrations.