Combustion quality spectrum

A system for identifying combustion dynamics in a combustion chamber, comprising:

• at least one sensor that receives energy from a flame within the combustion chamber;
• at least one processor configured to:
• receive a first signal from a flame, from the at least one sensor, corresponding to energy at a first wavelength characteristic of efficient combustion;
• receive a second signal from the flame, from the at least one sensor, corresponding to energy at a second wavelength characteristic of inefficient combustion, wherein the second wavelength is different from the first wavelength;
• generate a data set in a time domain, the data set characterizing a measure of combustion quality, based on a difference between the first signal and the second signal;
• convert the data set in the time domain into a combustion quality spectrum in a frequency domain;
• analyze the combustion quality spectrum to determine anomalies, wherein the anomalies indicate at least one frequency where combustion dynamics occur in the combustion chamber;
• and
• output the combustion quality spectrum, including a signal indicative of the at least one frequency where combustion dynamics occur.