System and method for controlling a single-spool turboshaft engine

摘要

One of a controllable load and a fuel flow to a single-spool turboshaft engine is controlled so that a rotational speed of a single-spool turboshaft engine is substantially regulated to a level corresponding to a corrected rotational speed command, and the other of the fuel flow and the controllable load is controlled so that a torque transmitted from the single-spool turboshaft engine to the controllable load is substantially regulated to a level corresponding to a corrected torque command. Under at least one operating condition, the corrected rotational speed command is determined so as to minimize or nearly minimize a measure of fuel consumption by the single-spool turboshaft engine when operated so that the torque transmitted to the controllable load corresponds to the corrected torque command.

主权项

1. A method of controlling a single-spool turboshaft engine operatively connected to a controllable load, comprising:
a. receiving a corrected torque command, wherein said corrected torque command is representative of a level of torque to be transmitted by an element operatively connecting said single-spool turboshaft engine to said controllable load so as to drive said controllable load; b. under at least one operating condition of said single-spool turboshaft engine, determining a corrected rotational speed command representative of a rotational speed responsive to an engine speed of said single-spool turboshaft engine, wherein a level of said corrected rotational speed command is determined responsive to either said corrected torque command or a corresponding said level of torque so as to minimize or nearly minimize a measure of fuel consumption by said single-spool turboshaft engine when operated so that a torque transmitted by said element operatively connecting said single-spool turboshaft engine to said controllable load is substantially equal in magnitude to said level of torque; c. controlling said controllable load to said single-spool turboshaft engine so that said rotational speed responsive to said engine speed of said single-spool turboshaft engine is substantially regulated to a level corresponding to said corrected rotational speed command; and d. controlling the other of said controllable load or said fuel flow to said single-spool turboshaft engine so that said torque transmitted by said element operatively connecting said single-spool turboshaft engine to said controllable load is substantially regulated to said level corresponding to said corrected torque command.