Signal testing method

Abstract

The invention discloses a signal testing method for a signal testing device. The signal testing device is electrically connected between an excitation source and a feedback source. The method comprises the following steps of: receiving an excitation signal transmitted by the excitation source; simulating the excitation signal and transmitting the simulated excitation signal to the feedback source; receiving a feedback signal transmitted by the feedback source; and simulating the feedback signal and transmitting the simulated feedback signal to the excitation source. Due to the adoption of the signal testing signal, all signals in a system circuit consisting of the excitation source, the signal testing device and the feedback source can be fully tested comprehensively, and the testing integrity is ensured; a simulation testing method is adopted in the signal testing method, so that the characteristics of the signals are not required to be known completely before testing; and moreover, in the signal testing method, the signal testing device is connected in series between the excitation source and feedback source, so that the signal testing device can be conveniently matched with the impedance of a tested system by adjusting the impedance characteristic of the signal testing device.

Description

technical field [0001] The invention relates to a signal testing method of a signal testing device. Background technique [0002] In the flight control system, there are many loop systems composed of excitation signal sources and feedback signal sources, which can be called excitation feedback systems. For example, the rudder surface LVDT (Linear Variable Differential Transformer) sensor receives the excitation voltage signal of the flight control computer, and at the same time feeds back the electrical signal to the flight control computer to form a loop. Another example is that the cockpit RVDT (Rotary Variable Differential Transformer) sensor receives the excitation voltage signal from the flight control computer, and at the same time feeds back the electrical signal to the flight control computer to form a loop. [0003] During the system test, in order to understand the signal characteristics of the system, it is necessary to test the flight control system sensors of t...

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Problems solved by technology

[0006] 2. Improper impedance matching. In theory, although the resistance of the signal testing device can be made larger, in fact, the signal testing device will still play the role of current shunt. If the matching is not proper, the system under test will not work normally. It is difficult to judge whether it is the result caused by the signal test device;

[0007] 3. The test signal is incomplete, and the signal test device only tests the feedback signal of the sensor. However, sometimes the cause of the failure of the feedback signal may be caused by the failure of the excitation signal. Therefore, due to the incompleteness of the test signal, it cannot be accurately obtained. conclusion of the test

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