Dynamic testing method of digital telex main flight control system for aircraft

A technology for dynamic testing and flight control systems, applied in the direction of electrical testing/monitoring, etc., can solve problems such as frequency response results are greatly affected, original data discrete frequency response analysis, stability margin value differences, etc.

Inactive Publication Date: 2014-12-17
COMAC +1
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Problems solved by technology

However, this method cannot directly perform discrete frequency response analysis on the raw data collected in the test, and must perform preprocessing including removing singularities, removing trend items, and filtering.
In discrete frequency response analysis, when fast Fourier transform is used to calculate the frequency spectrum, it is necessary to carefully select reasonable parameters for average smoothing, otherwise it will have a great impact on the frequency response results, resulting in significant differences in the stability margin value

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  • Dynamic testing method of digital telex main flight control system for aircraft
  • Dynamic testing method of digital telex main flight control system for aircraft
  • Dynamic testing method of digital telex main flight control system for aircraft

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Embodiment Construction

[0029] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.

[0030] figure 1 and figure 2 It has already been explained in the background technology part of the present invention, and in order to avoid repeated description, it is omitted here.

[0031] image 3 A flowchart 300 showing a dynamic testing method according to the present invention, Figure 4 A block diagr...

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Abstract

The invention relates to a dynamic testing method of a digital telex main flight control system for an aircraft. The method comprises the following steps: sending an enable signal through a testing operating platform; responding to the enable signal through a flight control computer which communicates with the test operating platform; overlapping a preset standard signal to a command signal to dynamically test the tested system to obtain a responding signal; acquiring the command signal and the responding signal through the testing operating platform; receiving the command signal and the responding signal subjected to digital-analog conversion through a dynamic signal analyzing instrument; performing dynamic responding analysis for the command signal, the responding signal and a reference signal to obtain a first dynamic responding result and a second dynamic responding result; subtracting the first dynamic responding result and the second dynamic responding result under different frequency points to obtain the dynamic respond of the system under the different frequency points. According to the method, the delay caused by D/A conversion and data acquiring can be canceled out mutually during solving the difference, and thus the obtained system stability is avoided additional delay.

Description

technical field [0001] The invention relates to a dynamic test method for a digital fly-by-wire main flight control system used for an aircraft. Background technique [0002] The stability of the control system is an important characteristic of the system. After any system is designed and developed, its stability must be tested. Stability is generally obtained by drawing the Bode diagram or Nyquist diagram of the system response signal and the injected frequency sweep signal. Therefore, how to inject the frequency sweep signal and how to obtain the Bode diagram or Nyquist during testing Special graphs are the two key points of dynamic testing. [0003] For the analog fly-by-wire flight control system, the signals are generally voltage quantities. The dynamic analyzer can directly inject the frequency sweep signal and collect the system response signal, obtain the system dynamic response in real time, and complete the system stability test. figure 1 A block diagram 100 of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 戴烨飞谢殿煌廖军辉郭巍孙云强张勇徐真
Owner COMAC
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