Синтез и анализ точности системы измерения параметров морского волнения, используемой на низколетящем аппарате

Abstract

Introduction: During a low-altitude flight over a disturbed sea surface, the wave profiles have variable elevations, gradients and orbital velocities, resulting in specific conditions for the operation of the measuring devices. This creates a significant obstacle in measuring the altitude. Also, to control a low-flying apparatus, it is necessary to estimate the intensity and direction of motion of the sea waves. Purpose: Structural-parametric synthesis of a system for measuring the altitude of a low-altitude vehicle over the sea surface and analyzing its accuracy, taking into account the peculiarities of the sea waves. Method: Complexation of different types of sensors with different spectral characteristics. A robust method which takes on corrupted but reliable spectral-correlation characteristics of the signals from a local altimeter and a vertical accelerometer. Results: Structural-parametric synthesis has been performed for a system of measuring the true and absolute heights, the intensity and direction of the wave propagation. Unlike the one used earlier, the proposed system evaluates the intensity and direction of the wave propagation, and is less susceptible to interference caused by the waves. The accuracy of the developed system is compared with the accuracy of a time-of-flight camera. Practical relevance: The application of the developed measuring system makes it possible to evaluate the true and absolute altitudes of a low-flying vehicle, the intensity and direction of the propagation of sea waves. As a result of parametric optimization of the coefficients of the transfer functions, the estimation accuracy increases three-fold.