Optimization method for lowering empty rate of UUV based on NSGA-II algorithm

Abstract

The invention belongs to the technical fields of overall performance analysis of an unmanned underwater vehicle (UUV) and multi-objective solving of an NSGA-II algorithm and particularly relates to an optimization method for lowering the empty rate of the UUV based on the NSGA-II algorithm. According to the method, a multidisciplinary optimization model of the UUV is established, an optimization objective function is clarified, overall design of the UUV is subjected to subsystem disintegration, and model design of the UUV is completed; then, by determining continuous variables and discrete variables contained in multidisciplinary optimization design, an objective function is calculated, and constraint conditions are stipulated; and finally multidisciplinary optimization is performed on the UUV according to multidisciplinary optimization design based on the NSGA-II algorithm to obtain an optimal result of the empty rate of the UUV. According to the method, the NSGA-II algorithm is selected to serve as a search algorithm for system optimization, multi-objective, multi-constraint and multi-variable actual UUV comprehensive performance problems are solved, comprehensive optimization of a typical UUV structure, performance and the empty rate of the UUV is realized, the empty rate of the UUV is lowered, good performance indicators of the UUV in all aspects are guaranteed, and therefore the method has high practicability.

Description

technical field [0001] The invention belongs to the technical field of overall performance analysis of unmanned underwater vehicles and NSGA-II algorithm for solving multi-objectives, and specifically relates to an optimization method for reducing UUV vacancy rate based on NSGA-II algorithm. Background technique [0002] Unmanned Underwater Vehicle (UUV) is an intelligent device that mainly uses submarines or surface ships as a support platform and can navigate underwater autonomously and remotely for a long time. It can carry a variety of sensors and special equipment. Or weapons, which perform specific missions and tasks, are regarded as the "power multiplier" of the modern navy, and their military use has been widely valued by many countries in the world. [0003] UUV has the advantages of large range of activities, deep diving, good mobility, intelligence, low operation and maintenance costs, etc. As an important substitute and executor in human activities in the ocean, ...

AI Technical Summary

Problems solved by technology

In the actual engineering of UUV design, the optimization problem of marine structure design is generally dealt with in a sequential manner, without fully considering the interrelationships between various disciplines, so the results obtained by the traditional optimization design of marine structures are often local optimum. The optimal solution, not the global optimal solution, especially when the void rate of the UUV, that is, the invalid volume in the aircraft body or the total displacement volume of the aircraft, will reduce the overall performance of the UUV. Therefore, it is necessary to establish a correct and applicable The mathematical model, the construction of a reliable and stable optimization method, and the optimal reduction of UUV vacancy rate are the problems that need to be solved urgently in the industry

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