Intelligent control method for dolphin motion stability of high-speed amphibious vehicle

Abstract

The invention discloses an intelligent control method for the dolphin motion stability of a high-speed amphibious vehicle, and aims to provide an intelligent control method capable of guaranteeing control precision and stability. The method includes: the following steps: selecting sample points in a variation range of each influence factor according to influence factors of the longitudinal stability of a vehicle, performing calculating by adopting a still water high-speed direct navigation motion simulation model of the vehicle to obtain a longitudinal motion parameter time calendar of the vehicle at a high speed, and performing analyzing by utilizing the longitudinal motion parameter time calendar of the vehicle to obtain a stability numerical value characteristic; combining the sample points and the corresponding stability numerical value features to establish a classification recognition database; performing classification and recognition on the classification and recognition database by using a support vector machine classification and recognition method to obtain a target classification result; and using the obtained target classification result as a judgment basis of the longitudinal stability of the vehicle under high-speed movement, controlling the adjustment of the angle of the wave suppression plate of the vehicle, and completing the control adjustment of the stability of the vehicle under high speed. According to the method, excessive adjustment is avoided while the navigation stability is ensured.

Description

technical field [0001] The invention relates to the technical field of high-speed amphibious vehicles, and more specifically relates to an intelligent control method for the motion stability of a high-speed amphibious vehicle dolphin. Background technique [0002] Dolphin motion is a phenomenon of unstable attitude during the longitudinal movement of the ship, which is manifested by the continuous change of pitch angle and vertical heave. It often appears on small fast surface ships such as planing boats, while the sailing attitude at high speed Excessive changes in the hull structure often lead to local excessive loads, which have a serious impact on the comfort of personnel and even the safety of navigation. For high-speed amphibious vehicles, their aspect ratio is smaller than that of high-speed boats, and their navigation attitude is more obviously affected by external forces. Therefore, the stability of their longitudinal motion under high-speed navigation conditions ca...

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, the higher the speed of the gliding body, the easier it is for dolphin movement to occur. Although the speed node at which dolphin movement occurs can be delayed to a certain extent by adjusting the center of gravity of the vehicle in the longitudinal direction, its adjustment ability is limited, and When the center of gravity is too forward, it will have a great adverse effect on the performance of the vehicle at the medium and low speed stage, making it difficult to smoothly enter the sliding state

[0004] As a common device for adjusting the attitude of the ship's navigation performance, the spoiler and the wave suppressor can change the dynamic pressure distribution on the bottom surface, control the pitching attitude and improve the stability of the dolphin movement; but as an appendage structure, its function Relatively fixed, single attitude and poor controllability when used in high-speed boats, cannot adapt well to changes in navigation state, and is prone to over-adjustment under certain sailing conditions

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