Patent ID: 8566000

Claim:
A control system for controlling a single-spool turboshaft engine operatively connected to a controllable load, comprising: a. an inlet-pressure-sensor input that provides for receiving an inlet-air-pressure signal from an inlet-air-pressure sensor indicative of a pressure of air being inlet to said single-spool turboshaft engine; b. an inlet-air-temperature-sensor input that provides for receiving an inlet-air-temperature signal from an inlet-air-temperature sensor indicative of a temperature of said air being inlet to said single-spool turboshaft engine; c. a power-level input that provides for receiving a power-level-input command signal; d. a processor operatively coupled to an associated memory, wherein i. said processor provides for determining a corrected torque command signal responsive to both said inlet-air-pressure signal and said power-level-input command signal, ii. said corrected torque command signal 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, iii. said processor provides for determining a rotational speed command signal representative of a rotational speed responsive to an engine speed of said single-spool turboshaft engine, iv. for at least one mode of operation: a) said rotational speed command signal is responsive to a corrected rotational speed command signal responsive to said corrected torque command signal, b) said processor provides for generating and outputting a torque command to one of said single-spool turboshaft engine or said controllable load, wherein said torque command is responsive to said corrected torque command signal and to said inlet-air-pressure signal, and c) said processor provides for generating and outputting a rotational speed command to the other of said single-spool turboshaft engine and said controllable load, wherein said rotational speed command is responsive to said corrected rotational speed command signal and to said inlet-air-temperature signal.