Three-section type control strategy for achieving long-distance fixed-point suspension of airship

Abstract

The invention discloses a three-section type control strategy for achieving long-distance fixed-point suspension of an airship. According to the invention, based on the initial distance, setting a speed reduction start distance and a suspension start distance; measuring a real-time flight position of the airship, comparing the real-time flight position with a target suspension position and making control mode selection judgment; setting the expected speed of the constant-velocity flight of the airship to be ud, setting the actual forward flight speed of the airship to be u, marking speed errors to be eu, and carrying out forward tracking control rule designing of the airship in the constant-velocity slight segment; selecting expected speed of the suspension start section and carrying out speed reduction section control; measuring the position information and the forward speed information of the airship and carrying out small-distance precise fixed-point suspension control; and establishing an airship pitching channel model and calling and controlling control parameters through simulation. The beneficial effects are that dynamic and steady-state performance of fixed-point suspension at the end section in case of the long distance is improved.

Description

technical field [0001] The invention belongs to the field of aircraft control, and relates to a three-stage control strategy for realizing long-distance fixed-point hovering of an airship. Background technique [0002] Due to the stable meteorological conditions and good electromagnetic properties in the stratosphere, the application value and broad application prospects of the stratospheric airship have attracted the attention of all countries in the world, and more and more literatures have carried out related reports. In the existing public literature, there are few materials about the airship flight control system, and most of them are about the airship design and stability analysis. At present, most of the researches on the hovering control of airships are about the hovering control of airships at close range, and the emphasis is on the accuracy and speed of hovering. But the published long-distance fixed-point hovering research results are few, mainly because there ar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a three-stage control strategy to realize long-distance fixed-point hovering of the airship, which solves the problem that the current fixed-point hovering is difficult to realize through position PID control because the initial position is far away from the target hovering point

Images