System fault discriminating electrostatic engine diagnostics
First Claim
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1. Electrostatic diagnostic apparatus for distinctly correlating different events occurring in an operating gas turbine engine, comprising:
- electrostatic signal means, including a probe to be disposed in the gas stream of an engine, for providing, when said probe is disposed in the gas stream of an operating engine, a probe signal having a waveshape defined by amplitude variations thereof across a time interval of a given duration in response to electrostatic charge flowing in the gas stream in the vicinity of said probe; and
signal processing means connected for response to said electrostatic signal means, for selectively providing a particular engine event identifying signal selected, in response to said amplitude variations across said time interval, from among a plurality of identifying signals in dependence on the waveshape of said probe signal having characteristics correlated to an engine event corresponding to said selected identifying signal, and for providing a diagnostic apparatus fault identifying signal in response to said amplitude variations across said time interval in dependence on the waveshape of said probe signal having characteristics correlated to a faulty condition in said electrostatic signal means.
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Abstract
The wave shapes of signals derived from electrostatic probes (1, 2, 3) disposed in the gas stream of a gas turbine engine are utilized to correlate the signals (FIGS. 57-59; FIGS. 62-80) with causal engine events, and also to correlate some of such signals (FIGS. 60 and 61) to faults in the diagnostic system, utilizing a special routine (FIG. 44) and also utilizing a routine that can discriminate between fault and engine event (FIG. 45).
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3 Claims
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1. Electrostatic diagnostic apparatus for distinctly correlating different events occurring in an operating gas turbine engine, comprising:
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electrostatic signal means, including a probe to be disposed in the gas stream of an engine, for providing, when said probe is disposed in the gas stream of an operating engine, a probe signal having a waveshape defined by amplitude variations thereof across a time interval of a given duration in response to electrostatic charge flowing in the gas stream in the vicinity of said probe; and signal processing means connected for response to said electrostatic signal means, for selectively providing a particular engine event identifying signal selected, in response to said amplitude variations across said time interval, from among a plurality of identifying signals in dependence on the waveshape of said probe signal having characteristics correlated to an engine event corresponding to said selected identifying signal, and for providing a diagnostic apparatus fault identifying signal in response to said amplitude variations across said time interval in dependence on the waveshape of said probe signal having characteristics correlated to a faulty condition in said electrostatic signal means. - View Dependent Claims (2, 3)
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Specification