Method improving precision of micro-mechanical gyroscope image stabling platform

Abstract

The invention discloses a method improving precision of a micro-mechanical gyroscope image stabling platform. The method sequentially comprises the following steps: (a) an accelerometer is mounted on the image stabling platform and a micro-mechanical gyroscope is mounted on a photoelectric rotary table; (b) a practical angular velocity Omega is calculated by a control system according to the angular velocity formula Omega=Omegas-Omega0; the image stabling platform is kept relatively static; (c) when the image stabling platform generates excursion, a single neuron PI adjuster is utilized by the control system to obtain a fixed zero point bias compensation dosage Omega0(k) at k through the formula PI (shown in the specification); (d) the modified practical angular velocity Omega' is obtained through the formula Omega'=Omegas-Omega0(k). A practical angle difference value is measured through the accelerometer, and is fed back to the control system, so that close-loop control is realized; the zero point bias compensation dosage Omega0 is changed dynamically, and then practical angular velocity Omega is modified, so that the problem that precision of the image stabling platform is not reached due to setting of a fixed zero point bias compensation dosage is solved.

Description

technical field [0001] The invention relates to a method for improving the precision of a micromechanical gyro image stabilization platform. Background technique [0002] The gyro image stabilization platform is a platform that controls the execution unit to offset external disturbances. It can effectively isolate the mounted camera equipment from various vibrations, ups and downs, and bumps of the moving carrier, and eliminate image blur and shaking. [0003] A gyroscope is a device that can accurately detect the angular velocity of an object, and it has a strategic position in national defense and aerospace. High-precision micro-mechanical gyroscopes are subject to export restrictions in European and American countries, which shows that the research on gyroscopes plays a very important role in improving a country's technological level. Compared with traditional gyroscopes, micromechanical (MEMS) gyroscopes have the advantages of low cost, small size, and high system integ...

AI Technical Summary

Problems solved by technology

But due to the unfixedness of the zero offset, the compensation fixed ω 0 is inaccurate, and the gyroscope is affected by factors such as temperature and mechanical vibration, so that the measured data ω s There is also an error, by ω=ω s -ω 0 Obtaining the angular velocity value is not accurate, and the accuracy of the image stabilization platform is difficult to guarantee

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