BACKGROUND

Modern aircraft engines and associated systems operate at increasingly higher performance and efficiencies, placing greater demands on electronic engine control (EEC) systems. Accordingly, the developing and/or testing of modern EEC systems is important to help optimize this performance, but a gas turbine engine is typically required to generate the various speed and vibration signals for system development and verification testing, which can be wasteful of resources. There is a need for simulating the speed and vibration signals from the detectors on a gas turbine engine for use in efficiently developing and/or testing these modern EEC systems.

SUMMARY

A system for generating input signals for an electronic engine control module includes a first waveform generator that is configured to generate a simulated first speed signal that is representative of a first speed and a vibration modulating signal that is representative of the first speed, a second waveform generator that is synchronized with the first waveform generator and is configured to generate a simulated second speed signal that is representative of a second speed and a vibration modulating signal that is representative of the second speed and a simulated composite vibration voltage signal comprised of the vibration modulating signal that is representative of the first speed received from the first waveform generator and the vibration modulating signal that is representative of the second speed, and a voltage-to-charge converter that is configured to receive the simulated composite vibration voltage signal from the second waveform generator and to generate a simulated composite vibration charge signal that simulates a vibration composite signal from an accelerometer based on the first and second speeds.

A method of generating input signals for an electronic engine control module by using a first and second waveform generator and a voltage-to-charge converter includes: generating, by the first waveform generator, a simulated first speed signal that is representative of a first speed and a vibration modulating signal that is representative of the first speed; inputting, from the first waveform generator to the second waveform generator that is synchronized with the first waveform generator, the vibration modulating signal; generating, by the second waveform generator, a simulated second signal that is representative of a second speed and a simulated composite vibration voltage signal that is representative of the second speed and the vibration modulating signal; and generating, by the voltage-to-charge converter, a simulated composite vibration charge signal that simulates a vibration composite signal from an accelerometer based on the first and second speeds. The simulated composite vibration charge signal is representative of the simulated composite vibration voltage signal.

