Autopilot system for a helicopter
First Claim
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1. An autopilot for a helicopter having at least two pilot axes, the autopilot comprising:
- for each of the two axes at least one servo-control module for applying a control relationship to supply a respective initial control instruction,the two control relationships having a common target,the autopilot including a calculator module configured for calculating control instructions from the two initial control instructions to output four coefficients a, b, c, and d, whereinbased upon said coefficients, said calculator module outputs intermediate instructions UICOLL=a*UTILT+b and UTMIN=c*UCP+d, where UICOLL is an intermediate collective control instruction, UTILT is an intermediate tilt control instruction, UTMIN is an intermediate instruction with a minimum value for controlling tilt and UCP is an initial control instruction calculated by one of the servo control modules from a relationship having a target different from said common target,wherein a servo-control module is configured for applying a relationship for maintaining an absorbed power for driving the rotor at a value below a setpoint value.
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Abstract
The present invention relates to an autopilot system for a rotary wing aircraft operating relative to at least two pilot axes, which system comprises, for each of the two axes, at least one servo-control relationship providing a respective initial control instruction, with the two relationships having a common target; the system includes combination means (36) for providing a series of control instructions by combining the two initial control instructions (UCV, UTV).
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Citations
5 Claims
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1. An autopilot for a helicopter having at least two pilot axes, the autopilot comprising:
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for each of the two axes at least one servo-control module for applying a control relationship to supply a respective initial control instruction, the two control relationships having a common target, the autopilot including a calculator module configured for calculating control instructions from the two initial control instructions to output four coefficients a, b, c, and d, wherein based upon said coefficients, said calculator module outputs intermediate instructions UICOLL=a*UTILT+b and UTMIN=c*UCP+d, where UICOLL is an intermediate collective control instruction, UTILT is an intermediate tilt control instruction, UTMIN is an intermediate instruction with a minimum value for controlling tilt and UCP is an initial control instruction calculated by one of the servo control modules from a relationship having a target different from said common target, wherein a servo-control module is configured for applying a relationship for maintaining an absorbed power for driving the rotor at a value below a setpoint value. - View Dependent Claims (2, 3, 4, 5)
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Specification