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Over-rotation test system for electrical-adjustable bi-motored helicopter turbo shaft engine

A turboshaft engine and test system technology, which is applied in the direction of engine testing, machine/structural component testing, measuring devices, etc., can solve the problems that the over-rotation test cannot be achieved, the input and output signal waveforms cannot be guaranteed, and the performance can be achieved. Reliable, well-used, and easy-to-use results

Inactive Publication Date: 2011-08-10
中航通用飞机有限责任公司
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  • Summary
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AI Technical Summary

Problems solved by technology

The technical defect of Eurocopter is that because it uses a pure hardware circuit, it cannot guarantee that the input and output signal waveforms are consistent, and it cannot achieve the purpose of accurately simulating the free turbine speed signal of the engine for the over-rotation test

Method used

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  • Over-rotation test system for electrical-adjustable bi-motored helicopter turbo shaft engine
  • Over-rotation test system for electrical-adjustable bi-motored helicopter turbo shaft engine
  • Over-rotation test system for electrical-adjustable bi-motored helicopter turbo shaft engine

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Embodiment Construction

[0018] The working principle of this system is that the 2-way N2B and N2C signals of the free turbine speed sensor signal of the electric adjustable engine are respectively input from two mutually isolated channels to the two-way sub-circuit of the signal processing module, and the two-way sub-circuit will convert the signal After the engine over-rotation signal is output to the helicopter engine electronic controller (EECU), the engine electronic controller controls the opening and closing of the engine over-rotation oil discharge valve to control the start or stop of the engine.

[0019] The electric-adjustable twin-engine helicopter engine over-rotation test system adopts microprocessor programming, data acquisition, signal processing and control analog circuit to output the predetermined signal. Carry out high-fidelity frequency multiplication with the same precision, and then input it to the engine electronic controller (EECU), and the EECU judges whether the engine enters...

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PUM

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Abstract

The invention relates to the technical field of engine experiments, in particular to the technical field of helicopter engine over-rotation experiments. The system comprises an engine free turbine speed sensor, a signal processing module, an electronic engine controller and an engine over-rotation fuel bleed valve, wherein the signal processing module comprises two identical sub-circuits, each ofwhich consists of an input limiter, a signal conditioning circuit, a microprocessor, a programmable waveform generator, a signal amplifier and an isolating output end; a rotating speed signal collected by the engine free turbine speed sensor is processed by the signal processing module and is then output to the electronic engine controller; the electronic engine controller controls the turn-on / turn-off of the engine over-rotation fuel bleed valve by analyzing the signal. The test system is simple in use, and has reliable performance and good effect.

Description

technical field [0001] The invention relates to the technical field of engine experiments, in particular to the technical field of helicopter engine overrotation experiments. Background technique [0002] When testing the engine control system, it is necessary to conduct an over-rotation experiment on the engine, that is, to check whether the engine control system can shut down the engine immediately when the engine over-rotates. Since the over-rotation of the engine will cause great damage to the engine, it will also affect the normal use record of the aircraft engine. The over-rotation test system processes the rotational speed signal output by the engine free turbine rotational speed sensor, making it virtual as an engine over-rotation signal without actually entering the over-rotation state of the engine. [0003] At present, there is no such speed signal processing technology and equipment in China. There are foreign technologies and products in this area. For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 韩永良刘彤军石磊朱跃法
Owner 中航通用飞机有限责任公司
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