Method of controlling gas generator power and torque output

A method of controlling power and torque output of a gas generator and propeller assembly for an aircraft, the controlling of the output of the gas generator via an operator manipulated input device, using a system, the system comprising one or more sensors, wherein the one or more sensors are configured to measure one or more environmental conditions, a gas generator shaft speed, and a power turbine torque, wherein the system further comprises an operator manipulated input device and one or more controllers comprising one or more processors and one or more memory devices, and wherein the one or more memory devices store instructions that when executed by the one or more processors cause the one or more processors to perform the method, the method comprising:

• receiving, via the operator manipulated input device, a throttle lever position defining at least an idle position, a takeoff position, and one or more intermediate positions therebetween;
• receiving, via the one or more sensors, one or more environmental conditions, wherein the one or more environmental conditions include one or more of an ambient air temperature, an ambient air pressure, and an ambient airflow rate;
• determining, via the controller, a first commanded fuel flow of the gas generator based on a gas generator speed output curve based at least on a throttle lever position, one or more environmental conditions, and a coefficient reference table;
• determining, via the controller, a second commanded fuel flow of the gas generator based on a power turbine torque output curve based at least on the one or more environmental conditions;
• determining, via the controller, whether to generate the gas generator output based at least on a measurement accuracy of the one or more sensors measuring the power turbine torque;
• and
• generating, via the gas generator, the gas generator output based on the first commanded fuel flow or the second commanded fuel flow, wherein the gas generator output is based on the first commanded fuel flow if the one or more sensors measuring the power turbine torque are beyond a predetermined accuracy threshold, and wherein the gas generator output is based on the second commanded fuel flow if the one or more sensors measuring the power turbine torque are not beyond the predetermined accuracy threshold.