High fidelity speed signal simulator based on dual dds

Abstract

The invention relates to a high-fidelity rotation speed signal simulator based on double DDSes. The high-fidelity rotation speed signal simulator based on the double DDSes is mainly characterized by being composed of the two DDSes and an embedded type controller, the first DDS provides clock pulse signals for the second DDS, the second DDS periodically updates data of arbitrary waveforms of a RAM storage area of the second DDS to a D / A converter to generate arbitrary waveforms under the clock control of the first DDS, the embedded controller is used for defining the waveform frequency and waveform data, the waveform data are loaded to the RAM storage area of the second DDS, and the first DDS is controlled to generate clock pulse signals according to the waveform frequency. The high-fidelity rotation speed signal simulator based on the double DDSes generates complex and variable rotation speed simulation signals through the double-DDS technology, can define the signal waveforms arbitrarily, is high in frequency resolution, efficiently and easily resolves the problem of high-fidelity simulation of rotation speed signals in an aero-engine controller hardware-in-loop simulation experiment, and improves the fidelity of the simulation experiment.

Description

technical field [0001] The present invention relates to a high-fidelity rotational speed signal simulator based on dual DDS, which is used for the high-fidelity rotational speed signal simulator of the hardware-in-the-loop simulation test of the engine controller. The invention relates to a periodic signal whose frequency can be continuously adjusted, involves simulation technology, DDS technology, computer technology, etc., and belongs to the technical field of aeroengine control system simulation technology. Background technique [0002] Aeroengines widely use magnetoelectric pulse speed sensors to measure the speed of the rotor. The magnetoelectric pulse speed sensor consists of a toothed wheel (also called a sound wheel) made of ferromagnetic material and a magnetic induction probe. The magnetic induction probe is made of a coil wrapped around a permanent magnet cylinder. The wheel is rotated by the engine rotor. When the wheel rotates and the tops and valleys of the t...

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a high-fidelity rotational speed signal simulator based on dual DDS, which aims to solve the problems of low frequency accuracy and lack of ability to simulate distorted waveforms in the simulation of aeroengine rotational speed sensors in the past, involving the use of phase accumulators, clocks Pulse generation, waveform data storage RAM, high-speed D / A converter, waveform definition and control software, etc.

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