A GPS round-trip non-constant flight airspeed calibration method

Abstract

The invention relates to a GPS round-trip non-constant flight airspeed calibration method, which determines the range of the full envelope of the aircraft to be measured, and the range of the air pressure altitude within the range of the full envelope to be measured is H 1 ~ H N , N is a natural number greater than 1, including the following steps: Step 1, within the range of the full envelope to be measured, select a height of H m In the airspace, the airspeed calibration results of several groups of non-constant speed round-trip flights were tested in turn, and the altitude was obtained as H m The airspeed calibration results in the airspace; step 2, according to the same method as the step 1, respectively test the height of H 1 , H N and height at H 1 ~ H N The airspeed calibration results of several altitudes within the airspace are obtained, and the airspeed calibration results within the full envelope range are obtained. This method performs airspeed calibration based on different flight speeds, avoids repeated flights at the same speed, improves the efficiency of airspeed calibration, reduces the number of test flights for airspeed calibration, and promotes the progress of test flight tasks with high accuracy.

Description

technical field [0001] The invention relates to the technical field of an airspeed calibration method for an aircraft atmospheric system, in particular to a GPS round-trip non-constant flight airspeed calibration method. Background technique [0002] The airspeed calibration flight test of the aircraft atmospheric system is a basic subject and a key subject for scientific research aircraft to be put into flight test, which is often related to the design of flight control law and the safety of flight control. However, in the flight test stage, due to the constraints of the production time of the aircraft, the constraints of the flight test cost, and the limitation of the number of flight sorties, only individual sample points are often tested for airspeed calibration. The flight test sample points are not enough to cover the full envelope of the aircraft. The accurate airspeed calibration correction of the atmospheric system within the envelope range affected the safety of su...

AI Technical Summary

Problems solved by technology

However, these methods have the following disadvantages: repeated flights at the same speed consume a lot of flight time and flight sorties, especially for aircraft with short flight times, when a single sortie is not enough to complete multiple airspeed calibration sample points Test flight, so that the airspeed calibration of all test flight test points in the altitude-speed full envelope can only be completed by increasing the number of flight sorties and delaying the task node, which increases the tediousness and error of the test

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