Digital accelerator device and test bed accelerator signal analog simulation system

Abstract

The invention provides a digital accelerator device and a test bed accelerator signal analog simulation system, and belongs to the technical field of aero-engine tests, and the digital accelerator device specifically comprises a power supply module, a communication protocol conversion module, a DDS module, a voltage amplification module, a frequency-voltage conversion module and a logic adaptation/conversion circuit. The frequency-voltage conversion module is used for collecting an excitation signal frequency value output by the digital electronic controller, the communication protocol conversion module is used for receiving a required accelerator angle characteristic value and converting the accelerator angle characteristic value into an SPI serial communication signal, and the logic adaptation/conversion circuit is used for carrying out logic adaptation conversion on the SPI serial communication signal and then sending serial operation data to the DDS module. The DDS module simulates an accelerator angle resolving signal according to the serial operation data, and the voltage amplification module is used for amplifying and outputting a simulation result. By means of the processing scheme, manual/automatic operation of the angle of the throttle lever on the aero-engine test bed can be achieved through upper computer software, and the control precision, the signal stability and the anti-interference capacity are improved.

Description

technical field [0001] The present application relates to the technical field of aero-engine testing, in particular to a digital throttle device and a test bench throttle signal simulation system. Background technique [0002] At present, the aero-engine control system has completed the transition from mechanical hydraulic control to FADEC (Full Authority Digital Electronic Controller). At the same time, the throttle joystick of the aero-engine test bench has gradually developed from the initial mechanical linkage and the subsequent improved servo motor mode to the current throttle angular displacement sensor control mode. [0003] At present, domestic aero-engine test benches generally use throttle lever angular displacement sensors to control the engine state, and the angular displacement of the throttle mostly uses sensors in the form of potentiometers, rotary differential transformers, and sine-cosine rotary transformers. The basic principle is that an angular displacem...

AI Technical Summary

Problems solved by technology

[0005] 1) When the state of the engine changes, the speed, accuracy and fine-tuning of the throttle push rod are all based on the experience of the operator, and it is difficult to control accurately, which may lead to mistakes

[0006] 2) Secondly, during the test run, especially during the long-term test run, the work intensity of the test run operator is extremely high

In addition, the procurement cycle of the special throttle lever sensor is extremely long, the price is expensive, and the phenomena of being idle and difficult to maintain are serious.

[0008] 4) In addition, after a long period of use, the angular displacement sensor has mechanical stagnation, performance attenuation, etc., and the sensor line is long, and it is very vulnerable to electromagnetic interference when it is not handled properly.

[0009] 5) In addition, the output signal characteristic of the resolver type sensor is usually an AC signal with a sine / cosine waveform of several thousand Hz, which cannot be generated and identified by the industrial control module of the test bench

With the requirement of automation, intelligence and fault information comprehensive diagnosis of aero-engine test bench, the throttle lever control signal, as the key decision-making signal of the test process and engine state judgment, can only be collected and solved by the engine digital electronic controller, which has been unable to meet the new requirements. Automated test run requirements for aero-engine test benches

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