Three-point piezoelectric driving fast steering mirror hysteresis compensation control system based on FPGA

Abstract

The invention discloses an FPGA-based three-point piezoelectric driving fast steering mirror hysteresis compensation control system, which comprises an FPGA hysteresis compensation control module, an SGS micro-displacement sensor, an SGS micro-displacement signal conditioning and acquisition circuit, a piezoelectric ceramic driving circuit, an upper computer and a three-point piezoelectric driving fast steering mirror, and is characterized in that the three-point piezoelectric driving large-aperture fast steering mirror is a controlled object, the SGS micro-displacement sensor is integrated in a piezoelectric ceramic actuator, the SGS micro-displacement signal conditioning and acquisition circuit is connected with the FPGA hysteresis compensation control module, the piezoelectric ceramic driving circuit is connected with the FPGA hysteresis compensation control module, and the upper computer is communicated with the FPGA through a 422 interface. According to the system, the parallel processing characteristic of the FPGA is fully utilized, deployment of a PI inverse model based on parallel connection of multiple Stop operators on the FPGA and parallel hysteresis compensation control of multiple piezoelectric ceramic actuators are completed, the calculation delay of the system is shortened, the response speed of the system is increased, and high-precision, real-time and synchronous multi-piezoelectric compensation and control are achieved.

Description

Technical field: [0001] The invention relates to a piezoelectric-driven fast-swing mirror, in particular to an FPGA-based three-point piezoelectric-driven fast-swing mirror hysteresis compensation control system. Background technique: [0002] The on-orbit working environment of the space astronomical telescope is very complex, and the detection accuracy of the detector will be affected by many complex factors. On the basis of technical means, precise image stabilization technology is needed to eliminate the influence of various disturbance sources on the space astronomical telescope. The Large-aperture FSM (LAFSM) is a key component of the precision image stabilization system of the space astronomical telescope. Motion compensation can effectively suppress the residual boresight error of the pointing and tracking system and achieve high-precision image stabilization. [0003] With the rapid development of nanoscale positioning technology, nanoscale piezoelectric precision...

AI Technical Summary

Problems solved by technology

However, the inherent hysteresis nonlinearity of piezoceramic actuators will adversely affect the accuracy of fast pendulum image shift compensation and degrade the performance of the image stabilization system.

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