Flexible satellite active vibration suppression method based on component force synthesis and fixed time convergence

Abstract

The invention discloses a flexible satellite active vibration suppression method based on component force synthesis and fixed time convergence. The flexible satellite active vibration suppression method comprises the following steps of step 1, establishing a flexible satellite attitude dynamics model with two pairs of large solar panels, and simultaneously establishing a dynamic model of a piezoelectric intelligent material actuator; step 2, designing a fixed time convergence sliding mold controller; step 3, designing a disturbance observer for ensuring a double-layer self-adaptive law with fixed time convergence characteristics; and step 4, outputting a dynamic model of the piezoelectric intelligent material actuator, implementing processing by adopting a continuous component force synthesis control idea, generating a new control torque command to be applied to a flexible accessory to counteract the influence of elastic vibration, and ensuring the attitude stability of a satellite body. The flexible satellite active vibration suppression method has the advantages of high attitude control precision and strong robustness. Meanwhile, a continuous component force synthesis method is introduced into a closed-loop control process through a piezoelectric sheet attached to the flexible accessory, vibration is inhibited, and the system interference is reduced.

Description

technical field [0001] The invention belongs to the technical field of spacecraft vibration control, in particular to an active vibration suppression method for flexible satellites based on component force synthesis and fixed time convergence. Background technique [0002] In recent years, my country has carried out many spacecraft development tasks in the field of space applications, including space stations, new Fengyun series meteorological satellite systems, ocean observation satellite systems, Beidou navigation satellite systems, lunar / fire detection spacecraft and deep space probes etc., and these spacecraft without exception have used larger-sized solar panels to provide sufficient power supply for the equipment on the spacecraft. The installation of flexible accessories represented by solar panels or large antennas outside the spacecraft body is becoming more and more common in the spacecraft of various countries in the world today, but what follows is that the flexib...

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a flexible satellite active vibration suppression method based on component force synthesis and fixed time convergence. New approach to simultaneously guarantee attitude accuracy, response time and vibration suppression

Images