某產(chǎn)品姿態(tài)測量及參數(shù)解算研究
[Abstract]:As an important tool for the development of marine resources, it is of great significance to accurately measure the motion attitude and trajectory of underwater products for ocean exploration. Therefore, it is the key to study the attitude and trajectory of the product to calculate the motion of the product. In order to meet the need of underwater measurement of a product, this paper proposes to use MTI inertial measurement sensor and pressure sensor to measure the parameters of triaxial acceleration, angular velocity, magnetic field intensity and water depth respectively. A new scheme for measuring product attitude and motion trajectory is realized by using quaternion method and Kalman filter fusion algorithm. This paper mainly discusses the following aspects: (1) the research of product attitude algorithm. Based on the reference coordinate system and attitude definition of product attitude, the whole structure of attitude algorithm is put forward: initial attitude alignment, updating attitude information with gyro data, Discrete Kalman filter (DKF) fusion system parameters estimate the optimal attitude angle of the product. Different gyro data updating algorithms are analyzed and simulated, and compared with the standard attitude. Finally, the quaternion Runge-Kutta algorithm is selected in combination with engineering practicability. A discrete Kalman filter data fusion algorithm model is proposed for the large error of the attitude solution using the quaternion method. The simulation results show that the algorithm is processed by the fusion algorithm. The precision of attitude angle calculation is improved significantly. (2) the basic matrix equation of product acceleration in geographical coordinate system is derived based on the motion relation of product relative coordinate system. The corresponding acceleration calculation formula is obtained by using attitude matrix transformation and fusion of the initial position information of the product. Furthermore, through iterative method and fusion of depth information, two kinds of computing models of product trajectory are derived, and the simulation experiments are carried out. The trajectory curve of the product motion is obtained. The simulation results show that the solution of the model is consistent with the real curve. (3) through the analysis of the underwater platform placement experiment, the experimental results verify the correctness of the attitude and trajectory algorithm.
【學(xué)位授予單位】:中北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:P715.5
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