초록 ▼

The commanded rotational speed is compared with the actual rotational speed to produce a deviation signal. This deviation signal is multiplied by a coefficient which is determined by state variables (speed and intake pressure) of the engine and a proportional component plus an integral component of

The commanded rotational speed is compared with the actual rotational speed to produce a deviation signal. This deviation signal is multiplied by a coefficient which is determined by state variables (speed and intake pressure) of the engine and a proportional component plus an integral component of the multiplication product is employed as a control signal. This control signal is checked to make sure that it is outside critical engine states associated with the actual performance of the engine. On this control signal is superposed a signal representing the steady-state fuel flow associated with the commanded rotary speed (or under some circumstances the actual rotary speed) to determine the fuel flow rate to the engine.

대표청구항 ▼

An apparatus for controlling the rotational speed of an aircraft turbo-jet engine, which engine has a compressor, said apparatus comprising: a commanded value generator providing a commanded rotational speed signal representing a commanded rotational speed of said compressor; compressor speed means

An apparatus for controlling the rotational speed of an aircraft turbo-jet engine, which engine has a compressor, said apparatus comprising: a commanded value generator providing a commanded rotational speed signal representing a commanded rotational speed of said compressor; compressor speed means for providing an actual rotational speed signal representing the actual rotational speed of said compressor; difference means connected to the commanded value generator and to the compressor speed means to receive said signals therefrom and to form a control deviation signal from the difference of said signals; controller means connected to said difference means to receive said control deviation signal, said controller means providing a controller output signal from said control deviation signal; function generator means for storing the relation between fuel flow rates and rotational speeds of said compressor in accordance with the steady-state characteristics of the turbo-jet engine and for providing a fuel flow output signal as a function of a rotational speed input signal to the function generator means; combining means connected to the controller means and to the function generator means for combining said controller output signal from said controller means and said fuel flow output signal from said function generator means as an engine fuel flow rate signal; a fuel control unit for metering the fuel supplied to the engine in accordance with an input signal applied thereto; and connecting means connecting said combining means and said fuel control unit for applying said engine fuel flow rate signal to said fuel control unit as said input signal to said fuel control unit, said connecting means including limiting means for limiting said engine fuel flow rate signals such that sufficient distance from the surge line is ensured; said apparatus being characterized by: means connecting said commanded value generator and said function generator means for applying said commanded rotational speed signal to said function generator means as said rotational speed input signal.