Airplane longitudinal gravity center deploying control method

Abstract

The invention discloses an aircraft longitudinal gravity center deploying control method, and belongs to the technical field of gravity center deploying control in aircraft test flight tests. The control method comprises the following steps: 1, setting a torque threshold value capable of starting adjustment and a deviation threshold value between a current gravity center and a target gravity center; and 2, calculating a to-be-changed moment amount required for reaching the target gravity center, and judging whether the moment amount is greater than a moment amount threshold value capable of starting adjustment or not so as to control the opening degree of the electric ball valve and finish the deployment of the gravity center. According to the invention, FPGA is adopted to achieve liquid level information collection, liquid level adjustment control, electric ball valve opening degree adjustment and control, the opening degree of the electric ball valve is controlled based on the torque amount by means of the feedforward and PID combined algorithm, all the water tanks are adjusted to participate in gravity center adjustment, the precision of the gravity center adjustment control method is improved in a pre-closing mode, and adjustment is fast and accurate.

Description

technical field [0001] The invention relates to an aircraft longitudinal center of gravity allocation control method, which belongs to the technical field of gravity center allocation control in aircraft flight tests. Background technique [0002] In the process of aircraft development and flight test, the center of gravity envelope detection is one of the most important indicators, which directly affects the flight safety of the aircraft. The center of gravity adjustment system is an automatic adjustment device based on water medium, which has been widely used by international civil aviation airliner companies. The center of gravity adjustment system can quickly and accurately adjust the center of gravity of the aircraft during the test flight related to the center of gravity of the aircraft, realize the functions of maintaining the center of gravity of the aircraft in different flight stages, and effectively improve the efficiency of the test flight. Problems of low deplo...

AI Technical Summary

Problems solved by technology

The center of gravity adjustment system can quickly and accurately adjust the center of gravity of the aircraft during the test flight related to the center of gravity of the aircraft, realize the functions of maintaining the center of gravity of the aircraft in different flight stages, and effectively improve the efficiency of the test flight. Problems of low deployment accuracy, poor real-time performance and poor stability

Images