US 11,920,521 B2
Turboshaft load control using feedforward and feedback control
Jessie Thorup, Malden, MA (US); and Christopher David King, Salem, MA (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Feb. 7, 2022, as Appl. No. 17/665,800.
Prior Publication US 2023/0287836 A1, Sep. 14, 2023
Int. Cl. F02C 9/26 (2006.01); B64C 27/12 (2006.01)
CPC F02C 9/26 (2013.01) [B64C 27/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gas turbine engine, comprising:
a power turbine mechanically coupled with a load; and
one or more processors configured to:
determine a first fuel flow demand based at least in part on a power demand rate associated with the load;
determine a second fuel flow demand based at least in part on a power turbine speed error associated with the power turbine and a power turbine speed error rate derived from the power turbine speed error;
determine a third fuel flow demand based at least in part on the power turbine speed error;
determine a composite fuel flow demand based at least in part on the first fuel flow demand, the second fuel flow demand, and the third fuel flow demand; and
control a fuel flow to the gas turbine engine based at least in part on the composite fuel flow demand.