Finite time anti-interference control method for broadband inertial reference unit

Abstract

The invention belongs to the field of space laser communication and the field of servo control, and particularly relates to a broadband inertial reference unit finite time anti-interference control method, which comprises the following steps of: 1, considering an asymmetric load and rotor sideslip existing in a broadband inertial reference unit as disturbance, and establishing a second-order mathematical model of the broadband inertial reference unit; 2, designing a finite time extended state observer for estimating disturbance of the broadband inertial reference unit; 3, designing a finite time controller to reduce the influence of disturbance on the output of the broadband inertial reference unit by using a disturbance estimated value obtained by the finite time extended state observer, so as to realize high-precision position control; and 4, carrying out convergence test on the finite time extended state observer and the finite time controller by adopting a Lyapunov function. The problem that the high-precision position control process of the broadband inertial reference unit is easily influenced by asymmetric load and rotor sideslip is solved, and it is guaranteed that the broadband inertial reference unit can output a stable and high-precision deflection angle within finite time.

Description

Technical field: [0001] The invention belongs to the field of space laser communication and the field of servo control, in particular to a limited-time anti-jamming control method of a broadband inertial reference unit. Background technique: [0002] With the development of laser communication technology, broadband inertial reference units are widely used in ground optical communication systems and outer space optical communication systems, which are used to provide a stable and high-precision deflection angle that is not affected by disturbances. In order to ensure the pointing accuracy of the platform load mounted on the broadband inertial reference unit, it is necessary to consider the anti-jamming control of the broadband inertial reference unit. [0003] The upper platform of the broadband inertial reference unit is equipped with various sensors, lasers, mirrors, etc. as loads. When the platform moves on the broadband inertial reference unit, if the center of mass of t...

AI Technical Summary

Problems solved by technology

In the design process of most existing controllers, the influence of interference on the output angle of the broadband inertial reference unit is ignored, so the steady-state performance and transient performance of the output angle will be greatly reduced

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