Patent ID: 7571045

Claim:
A system configured to control a gas-turbine engine having at least a turbine, comprising: a plurality of sensors configured to generate outputs indicative of operating conditions of the engine including a rotational speed of the turbine; a first control channel configured to input the outputs of the sensors to calculate a first command value indicative of a quantity of fuel to be supplied to the engine and outputting the first command value; a second control channel, being operative in parallel with the first control channel, configured to input the outputs of the sensors to calculate a second command value indicative of the quantity of fuel to be supplied to the engine and outputting the second command value; a switching instruction generator configured to generates an instruction to switch from one to the other between the outputs of the first and second control channels in response to the operating condition of the engine; and a fuel control unit configured to control the supply of fuel to the engine based on the switched one of the outputs of the first and second control channels; wherein the second control channel is further configured to calculate and output the second command value using the first command value so long as the instruction to switch the outputs is not generated, while calculating and outputting the second command value, without using the first command value, when the instruction to switch the outputs is generated.