Pseudo-closed-loop-based high-precision speed control method for supersonic large maneuvering target

Abstract

The invention provides a pseudo-closed-loop-based high-precision speed control method for a supersonic large maneuvering target, and aims to provide a high-precision pseudo-closed-loop speed control method for a large maneuvering target in a cruise profile, wherein a liquid rocket engine with thrust incapable of being continuously adjusted is adopted as power of the large maneuvering target. The method comprises the following steps: firstly, predicting the cruise resistance of a profile through a mathematical model of a large maneuvering target; then, according to the predicted resistance Dyc, designing a strategy of three thrust combinations; due to the fact that the establishment and the decline of the thrust of the engine have response time, in order to ensure the high-precision control of the cruising speed, a threshold correction value of startup and shutdown of the engine is designed. Flight test results prove the effectiveness of the method.

Description

technical field [0001] The present invention relates to a speed control method of a supersonic large maneuvering target, in particular to a high-precision speed control method based on a pseudo-closed loop during the cruising process of a supersonic large maneuvering target powered by a liquid rocket engine whose thrust cannot be continuously adjusted . Background technique [0002] The Skylark supersonic large maneuvering target is a high-performance target jointly developed by Northwestern Polytechnical University and Xi'an Aerospace Power Research Institute. Weapon system development, finalization, qualification, and tactical training of pilots provide high-performance air targets. The target can achieve cruise flight within a wide speed envelope of 0.8 to 1.6 Ma in a large airspace of 8 to 14 km, and at the same time can achieve a stable and large overload maneuver of not less than 6g within the full envelope. In order to achieve the ability to simulate the supersonic ...

AI Technical Summary

Problems solved by technology

In order to achieve the ability to simulate the supersonic cruise and maneuvering flight of the fourth-generation fighter jet, the aero-engine cannot meet the design requirements during the target development stage, which makes the large maneuvering target only use liquid rocket engine as power in the selection of power system

[0003] However, the characteristic of the liquid rocket engine is that the thrust cannot be continuously adjusted during the flight. The Skylark large maneuvering target has two liquid rocket engines, and each liquid rocket engine has 3 gears, respectively 600 / 1000 / 1200N As well as 2000 / 2500 / 2800N, the gears of the two engines need to be set before launch and cannot be changed after launch. The combination of the thrust gears of the two engines can cover any profile within the full flight envelope

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