Underwater submersible space motion emulation method based on hydrodynamic coefficient susceptibility

Abstract

The invention provides a submersible vehicle spatial motion simulation method based on hydrodynamic coefficient sensitivity, which adopts SJ (RJ-RJ*) / RJ* as the hydrodynamic coefficient sensitivity index; sets one hydrodynamic coefficient as zero, and holds other hydrodynamic coefficients, to obtain a variable submarine spatial motion model, processes same driving test on the variable model and an original motion model, to obtain two groups of maneuverability parameters, calculates one group of sensitivity indexes of the hydrodynamic coefficient, and processes same operation on each hydrodynamic coefficient; selects an acceptable error reference value A as a simplified standard to simplify a submersible vehicle spatial motion equation, and uses the submersible vehicle spatial motion equation to simulate submersible vehicle spatial motion. The inventive simplified simulation method is based on general simulation test, and is simplified according to sensitivity indexes, while the simplification is suitable for object simulation tests.

Description

(1) Technical field [0001] The invention relates to a simulation method, in particular to a simplified simulation method for submarine space motion. (2) Background technology [0002] The submarine motion simulation model is a multi-variable differential equation established based on dynamics theory, fluid mechanics theory and submarine maneuverability theory. The Taylor series of rotation and rudder speed and the rotational speed of the propeller, according to experience, for the maneuvering situations that may be encountered in general, retaining the Taylor expansion to the third order is sufficient to meet the engineering requirements, and according to people's habits and the ship model test used Due to the different devices and the convenience of calculation, only the second-order coefficients are often used. Currently generally accepted are Gertler's "Standard Equations of Motion for Submarine Simulation Research" published by the U.S. Taylor Naval Ship Research and De...

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Problems solved by technology

Currently generally accepted are Gertler's "Standard Equations of Motion for Submarine Simulation Research" published by the U.S. Taylor Naval Ship Research and Development Center (DTNSRDC) in 1967 and the revised standard equation of motion for submarines published in 1979. It is difficult to obtain the exact values ​​of all the hydrodynamic coefficients in the equation, especially the values ​​of some coupling hydrodynamic coefficients are very small, and it is difficult to measure them experimentally

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