Signal detection and fault simulation device for semi-physical simulation test

Abstract

The invention belongs to the aircraft engine test technology, and relates to improvement on a fault simulation device for a semi-physical simulation test. The device comprises a case in which a circuit board [1] is mounted, and an input socket [2] and an output socket [3] are also mounted on the case; the device is characterized in that each signal transmission line is connected with a cutoff relay in series, and comprises a signal detection circuit, wherein the cutoff relay comprises a normally closed switch; and the signal detection circuit is composed of n input switching relays, n output switching relays, 4 instrument switching relays, a voltmeter [5], a frequency meter [6], a resistance meter [7] and an ampere meter [8]. The device provided by the invention has signal detection capability and automatic fault test capability.

Description

technical field [0001] The invention belongs to the aero-engine test technology and relates to the improvement of a failure simulation device used for semi-physical simulation tests. Background technique [0002] During the semi-physical simulation test and real test of the control system, it is necessary to simulate various electrical faults that may occur in sensors, actuators, lines, etc., in order to obtain the impact of various faults on the normal operation of the control system, and to test the impact of the control system on various The accuracy of fault detection, judgment criteria and rationality of fault countermeasures. The structure of a current fault simulation device used for semi-physical simulation tests can be found in figure 1 , it has a chassis with a circuit board 1 installed inside, and an input socket 2 and an output socket 3 are also installed on the chassis. On the circuit board 1, between the input socket 2 and the output socket 3, there is a first...

AI Technical Summary

Problems solved by technology

The disadvantages of this fault simulation device are: first, it does not have signal detection capability

The disconnection function can only be realized through the manual toggle switch, and the signal cannot be detected through the device

In order to measure the signal, a temporary transfer line must be used, and the measurement of resistance, frequency, voltage, current and other signals can be realized by connecting a multimeter in the test cable, which will cause certain difficulties in the debugging and verification of the test

Second, there is no ability to conduct automated failure tests

The device cannot be controlled by the upper computer program to control the open circuit fault, and the fault path and the number of fault paths cannot be pre-set according to the needs of the test, so that it cannot meet the needs of automatic fault simulation

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