Sensitivity Analysis of Maneuverability of an AUV to Added Mass Coefficients Variations
Understanding of the hydrodynamic performance of an Autonomous Underwater Vehicle (AUV) is essential to investigate of its capability to perform a mission. Dynamic simulation of the equations of motion and analyzing the vehicle maneuverability is a useful tool for performing these evaluations. To achieve this aim the sensitivity of maneuvering of an underwater vehicle to changes of hydrodynamic coefficients can be investigated. In the current study the sensitivity of maneuverability of an AUV to changes of added mass coefficients is considered. In the first step the hydrodynamic coefficients of the AUV are calculated using analytical-semi empirical method. Next the six degree freedom of dynamic equation for this vehicle is solved and the behavior of turning maneuverer is simulated. In the following by changing the different added mass coefficients the behavior change of the underwater vehicle is evaluated. The results shows that the steady turning radius of the maneuver is insensitive to added mass elements, where the advance length which is the character of the transient phase has the most sensitivity to added mass elements. While tactical diameter which is the combination of steady and transient phases has average sensitivity to added mass parameters.
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