CN-121978368-A - Design method of airplane ground speed detection system

Abstract

The invention provides a design method of an airplane ground speed detection system, which comprises the following steps of determining the maximum ground speed in the ground sliding process of an airplane, determining the maximum rotating speed of a front wheel corresponding to the maximum ground speed in the ground sliding process of the airplane, determining a speed range detected by a speed sensor according to the maximum rotating speed of the front wheel, determining the ground speed detection range in the ground sliding process of the airplane, determining the frequency range of a ground speed detection signal in the ground sliding process of the airplane, and outputting a ground speed detection signal in the ground sliding process of the airplane. The invention can obtain the real-time ground speed of the aircraft, ensure the detection precision without calibration, and is convenient for system use and maintenance.

Inventors

• XING XIAOBIN
• JI TAOYANG
• CHEN YUEXIA
• SHI HONGYU
• ZHAI DONG
• YUAN GUISHAN
• XUE WENLIANG
• WEI XIAOJIE
• TIAN RUI
• PANG XUHUI

Assignees

• 陕西飞机工业有限责任公司

Dates

Publication Date

20260505

Application Date

20251127

Claims (8)

1. 1. The design method of the aircraft ground speed detection system is characterized by comprising the following steps of: step one, determining the maximum ground speed in the ground sliding process of an airplane; step two, determining the highest rotating speed of the front wheel corresponding to the maximum ground speed in the ground sliding process of the airplane; Step three, determining a detection speed range of a speed sensor according to the highest rotating speed of the front machine wheel; determining a ground speed detection range in the ground sliding process of the aircraft; Step five, determining the frequency range of a ground speed detection signal in the ground sliding process of the airplane; and step six, outputting a ground speed detection signal in the ground sliding process of the airplane.
2. 2. The method according to claim 1, wherein the step one is to detect the maximum speed of the front wheel by a speed sensor as the maximum ground speed.
3. 3. The method for designing an aircraft ground speed detection system according to claim 2, wherein the maximum speed of the front wheels includes a maximum take-off speed and a maximum landing speed, and a larger value of the maximum take-off speed and the maximum landing speed is taken as the maximum ground speed.
4. 4. The method for designing an aircraft ground speed detection system according to claim 3, wherein the step two is to determine the highest front wheel rotation speed according to the maximum ground speed detectable during ground taxiing of the aircraft, the outer diameter of the tire, and the average compression amount of the tire under normal takeoff load.
5. 5. The method for designing an aircraft ground speed detection system according to claim 4, wherein the third step is specifically: determining the highest rotating speed of the speed sensor according to the meshing relationship between the pinion of the transmission device in the front wheel and the large gear of the wheel assembly and the highest rotating speed of the front wheel, and taking the highest rotating speed of the speed sensor as the highest value of the detection range; the minimum rotation speed of the speed sensor is taken as the lowest value of the detection range of the speed sensor, so that the detection range of the speed sensor is obtained.
6. 6. The method for designing an aircraft ground speed detection system according to claim 5, wherein the fourth step is specifically: Determining the rotation speed of the wheel corresponding to the minimum rotation speed of the speed sensor through the minimum rotation speed of the speed sensor according to the step three; and determining the ground speed of the airplane corresponding to the minimum rotation speed of the speed sensor according to the rotation speed of the airplane corresponding to the minimum rotation speed of the speed sensor and the step two.
7. 7. The method for designing an aircraft ground speed detection system according to claim 6, wherein the fifth step is specifically: rotating a rotor of the speed sensor for one circle to output a voltage signal with a set amplitude; and determining the relation between the frequency of the ground speed signal and the rotation speed of the front wheel of the airplane in the ground taxiing process of the airplane.
8. 8. The method for designing an aircraft ground speed detection system according to claim 7, wherein the sixth step is specifically: And determining a ground speed detection signal output circuit in the ground taxi process of the airplane and outputting a waveform and a fluctuation error of a speed sensor according to the voltage signal and the ground speed signal frequency in the ground taxi process of the airplane.

Description

Design method of airplane ground speed detection system Technical Field The invention relates to a design method of an aircraft ground speed detection system. Background The ground speed of an aircraft is the horizontal movement speed of the aircraft relative to the ground, and is commonly the inertial navigation ground speed and the GPS ground speed. The inertial navigation ground speed is obtained by measuring the motion state of the airplane through an internal gyroscope and an accelerometer by an airplane inertial navigation system and through integration and coordinate conversion, and the GPS ground speed is provided by a GPS satellite. The inertial navigation ground speed has the advantages of autonomy and anti-interference capability, but needs to rely on regular calibration to ensure long-term accuracy, and the current method for detecting the ground speed of the airplane determines that the ground speed of the airplane is an average speed, and can only approach the real speed infinitely, but the real-time ground speed of the airplane is difficult to obtain, and the accuracy of the inertial navigation ground speed needs to be ensured by relying on calibration. The real-time speed of the automobile is measured by adopting a GPS technology or an automobile wheel speed sensor at present, the real-time speed of the automobile cannot be obtained by adopting a detection method that the average speed approaches to the real-time speed, and the automobile speed can be accurately measured by adopting a Doppler speed sensor to measure the automobile speed to output a pulse signal with the frequency proportional to the measured speed. Disclosure of Invention In view of the above, the invention provides a design method of an aircraft ground speed detection system, so as to accurately and reliably detect the real-time ground speed in the aircraft ground sliding process. The invention provides a technical scheme that the design method of an airplane ground speed detection system comprises the following steps of determining the maximum ground speed in the ground sliding process of an airplane, determining the highest rotating speed of a front wheel corresponding to the maximum ground speed in the ground sliding process of the airplane, determining the detection speed range of a speed sensor according to the highest rotating speed of the front wheel, determining the ground speed detection range in the ground sliding process of the airplane, determining the frequency range of a ground speed detection signal in the ground sliding process of the airplane, and outputting a ground speed detection signal in the ground sliding process of the airplane. Compared with the prior art, the at least one technical scheme adopted by the invention has the beneficial effects that at least the speed sensor is driven by the front wheel to rotate at a high speed in the ground sliding process of the aircraft, and the speed sensor can accurately and reliably detect the real-time ground speed in the ground sliding process of the aircraft. The ground speed detection system can obtain the real-time ground speed of the aircraft, can ensure the detection precision without calibration, and is convenient to use and maintain. Drawings In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. FIG. 1 is a schematic flow chart of an embodiment of the present invention; FIG. 2 is a schematic diagram of an excitation detection circuit in an embodiment of the invention; FIG. 3 is a graph of speed sensor output waveforms and fluctuation error in an embodiment of the present invention. Detailed Description Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments. The invention changes the centrifugal sensor originally arranged on the front wheel bracket of the airplane into the speed sensor capable of detecting the rotation speed of the airplane wheel in real time, and the airplane wheel speed sensor works according to the electromagnetic induction principle. The gear at the front end of the speed sensor is connected with a transmission gear on the front wheel bracket of the airplane to drive the speed sensor rotor to rotate at a high speed, when the airplane slides on the ground, relative movement is generated between teeth on the speed sensor rotor and teeth on th