A displacement sensor simulation circuit

Abstract

The invention belongs to the technical field of telex flight control system tests, and especially relates to a displacement sensor simulation circuit. The displacement sensor simulation circuit of the invention can be divided into three parts which are an input signal processing circuit, a signal modulation circuit, and an output signal processing circuit. The simulation circuit receives simulation output signals, and decomposes the simulation output signals into two paths of direct current simulation signals which are corresponding to two secondary manipulated variables in terms of sizes. The two direct current simulation signals are modulated to two paths of alternating current simulation signals through the utilization of an amplitude modulation principle. A driving capability of the signals is raised through the utilization of a reactive circuit composed of an operational amplifier and a triode, and a transformer is driven to be an output, so that secondary output impedance characteristics of a linear displacement sensor are simulated. The displacement sensor simulation circuit of the invention is simple in design, low in cost, and can simulate the signals of the displacement sensor very well.

Description

technical field [0001] The invention belongs to the field of fly-by-wire flight control system test technology, and in particular relates to a displacement sensor simulation circuit. Background technique [0002] In the aircraft of the fly-by-wire flight control system, the pilot control sensor is the signal source of the manual control of the aircraft, which converts the pilot's control displacement (or control force) of the control stick and pedals into a voltage signal proportional to it, and sends it to into the flight control computer. Fly-by-wire flight control systems or control enhancement systems generally use displacement sensors as the driver's manipulation sensors. Driver manipulation sensors come in two forms: [0003] Linear Variable Differential Transformer (Displacement Transducer, LVDT): Converts linear displacement into a voltage signal. [0004] Rotary Variable Differential Transformer (Angular Displacement Transducer, RVDT): Converts angular displaceme...

AI Technical Summary

Problems solved by technology

[0006] In the test, the flight control computer needs to collect the signals of these sensors. The construction of the traditional physical environment often takes a long time and costs a lot.

Moreover, it is difficult to complete the construction of faults and automatic testing of specific functions in a physical environment

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