Control device for controlling an engine of a turbine power system having more than one engine
First Claim
1. Control device for controlling an engine of a turbine power system having more than one engine comprising first torque measuring means for generating a primary torque signal which varies as a function of the torque generated by the controlled engine, second torque measuring means for generating a secondary torque signal which varies as a function of the torque generated by one of the other engines of said power system, means for subtracting the secondary torque signal from the primary torque signal to form a difference signal, said controlled engine having a power turbine, means for generating a speed signal proportional to the speed of the power turbine, means for generating a summing signal as a function of the sum of said speed signal and said difference signal, means for generating a control signal as a function of the summing signal, said control signal generating means including means for integrating a difference signal which varies as a function of the difference between said summing signal and a feedback signal which varies as a function of said control signal, and means responsive to said control signal for controlling fuel flow to said controlled engine under predetermined conditions.
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Accused Products
Abstract
A control device for controlling an engine of a turbine power system having more than one engine is disclosed. The control device includes a proportional-integral-differential (PID) controller based on power turbine speed and a signal representing the difference between the torque of the engine being controlled and the torque of another engine in the power system, if the controlled engine is generating a torque less than that of the other engine. Accordingly, the control loop used in the device inherently tends to bring the torque of the controlled engine up to the torque of the other engine while maintaining power turbine speed equal to its reference, thereby equalizing the torques without expensive electrical connections between the controls of the two engines. Overrides are provided so that fuel also may be controlled based on the maximum torque of the engine being controlled, the total torque exerted by all the engine of the power system, the power tubine temperature, or by positive or negative gas generator speed rate of changes.
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Citations
11 Claims
- 1. Control device for controlling an engine of a turbine power system having more than one engine comprising first torque measuring means for generating a primary torque signal which varies as a function of the torque generated by the controlled engine, second torque measuring means for generating a secondary torque signal which varies as a function of the torque generated by one of the other engines of said power system, means for subtracting the secondary torque signal from the primary torque signal to form a difference signal, said controlled engine having a power turbine, means for generating a speed signal proportional to the speed of the power turbine, means for generating a summing signal as a function of the sum of said speed signal and said difference signal, means for generating a control signal as a function of the summing signal, said control signal generating means including means for integrating a difference signal which varies as a function of the difference between said summing signal and a feedback signal which varies as a function of said control signal, and means responsive to said control signal for controlling fuel flow to said controlled engine under predetermined conditions.
- 6. Control device for controlling an engine of a turbine power system having more than one engine, comprising first torque measuring means for generating a primary torque signal which varies as a function of the torque generated by the controlled engine, secondary torque measuring means for generating a second torque signal which varies as a function of the torque generated by one of the other engines of said power system, means for generating a first difference signal which varies as a function of the difference between said primary and secondary torque signals, means for generating a second signal which varies as a function of the sum of said primary and secondary torque signals, said controlled engine having a power turbine, and means for generating a control signal as a function of said first difference signal and a signal which varies as a function of the speed of said power turbine, and means for selecting between said control signal and said second signal to control fuel flow to said one engine.
Specification