FIELD: aircraft turbine engines and turboprop engines. SUBSTANCE: rotational speed of forward and aft propellers of turboprop engine is measured and is compared with preset magnitude; then control signal is formed for change of pitch of forward propeller in accordance with error of adjustment of rotational speed of center propeller and control signal for change of pitch of aft propeller in accordance with error of adjustment of rotational speed of aft propeller. provision is made for adaptive cross coupling between propeller rotational speed control channels to enhanced accuracy of control of rotational speed of forward and aft propellers at steady-state conditions. EFFECT: enhanced accuracy of control. 1 dwg
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