Rotor torque predictor
First Claim
1. A system for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation, the total torque including the aerodynamic torque and static torque at the main and tail rotors, the system comprising:
- a) means for predicting the aerodynamic torque at the main and tail rotors with the helicopter in motion;
b) means for determining the torque at the main rotor with the helicopter stationary;
c) means for determining the torque at the tail rotor with the helicopter stationary; and
d) means for calculating the required total torque at the main and tail rotors based upon the aerodynamic torque at the main and tail rotors with the helicopter in motion, the torque at the main rotor with the helicopter stationary, and the torque at the tail rotor with the helicopter stationary.
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Accused Products
Abstract
A system is disclosed for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation which includes a polynomial neural network adapted and configured to predict the aerodynamic torque at the main and tail rotors with the helicopter in motion based upon a plurality of pilot inputs and airframe inputs, a main rotor load map for determining the torque at the main rotor in hover out of ground effects based upon main rotor speed and collective stick position, a tail rotor load map for determining the torque at the tail rotor with the helicopter stationary based upon main rotor speed and pedal position, and a processor for calculating the required total torque at the main and tail rotors by summing the outputs of the polynomial neural network, and the main and tail rotor load maps.
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Citations
21 Claims
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1. A system for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation, the total torque including the aerodynamic torque and static torque at the main and tail rotors, the system comprising:
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a) means for predicting the aerodynamic torque at the main and tail rotors with the helicopter in motion;
b) means for determining the torque at the main rotor with the helicopter stationary;
c) means for determining the torque at the tail rotor with the helicopter stationary; and
d) means for calculating the required total torque at the main and tail rotors based upon the aerodynamic torque at the main and tail rotors with the helicopter in motion, the torque at the main rotor with the helicopter stationary, and the torque at the tail rotor with the helicopter stationary. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation, the total torque including the aerodynamic torque and static torque at the main and tail rotors, the system comprising:
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a) a polynomial neural network adapted and configured to predict the aerodynamic torque at the main and tail rotors with the helicopter in motion based upon a plurality of pilot inputs and airframe inputs;
b) a main rotor load map for determining the torque at the main rotor in hover out of ground effects based upon main rotor speed and collective stick position;
c) a tail rotor load map for determining the torque at the tail rotor with the helicopter stationary based upon main rotor speed and pedal position; and
d) means for calculating the required total torque at the main and tail rotors by summing the outputs of the polynomial neural network, and the main and tail rotor load maps. - View Dependent Claims (18, 19, 20, 21)
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Specification