Hull deformation measurement method based on the time delay compensation

The present invention provides a time-based delay compensation hull deformation measuring method. First, two sets of fiber optic gyroscope mounted in a fixed position of the hull, and the hull deformation angle obtained. Then calculate the coordinate conversion between both the angular velocity and the finally obtained output difference, two sets of delay obtained FOG real time according to the relationship between the actual angular rate present in the system. Finally, the introduction of constructs gyro drift measurement equation of the Kalman filter, and a mathematical model gyro drift angle and the deformation of the hull of the Kalman filter state equations, angular rate gyro output is input observation, estimation of the deformation angle. The method of administering a method of compensating for a time FGU hull deformation measurement technique in measuring the real ship-based applications faced delays, thereby reducing the measurement error, improve the measurement accuracy, and is simple and practical, the compensation effect is obviously beneficial hull deformation application of measurement.