An autopilot logic is designed here for controlling a helicopter with a hanging load. A 16th order model for the system is decoupled into four subsystems: (1) a second order system for yawing motion, (2) a second order system for vertical motion, (3) a sixth order system for longitudinal motion, and (4) a sixth order system for lateral motion. A measuring scheme, which could be used in remote areas, is developed and filters are designed to estimate the state variables from these measurements. The autopilot can be used to move the load over short distances without retracting the cables. This is done by automatically shifting the autopilot modes from position-hold (hover) to acceleration-hold to velocity-hold (cruise) to deceleration-hold to velocity-hold (near hover) to position-hold (hover). Use of such an autopilot might save considerable turnaround time. The Sikorsky S-61 helicopter is chosen as an example vehicle. The performance of the controlled system is studied in the presence of longitudinal and lateral winds.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Automatic control of a helicopter with a hanging load


    Contributors:

    Publication date :

    1973-06-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Helicopter hanging load swing control balancing device

    LI CHANG / LI XIAOGUANG / HUAN PING | European Patent Office | 2023

    Free access

    Unmanned helicopter hanging load release monitoring method

    WEN HOULIN / CHEN DONG / PENG JUN et al. | European Patent Office | 2024

    Free access

    Near-hover control of a helicopter with a hanging load

    Gupta, N. K. / Bryson, A. E., Jr. | NTRS | 1976


    Near-hover control of a helicopter with a hanging load

    GUPTA, N. K. / BRYSON, A. E. | AIAA | 1976


    Helicopter cargo grounding automatic opening lifting hook, helicopter and hanging method

    YONG LIPENG / CHANG FEI / WANG XIAOYANG et al. | European Patent Office | 2024

    Free access