Deutsches Zentrum Fuer Luft-und Raumfahrt E.v

Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Eurocopter Deutschland Gmbh

Hanno Brenner

Christoph Kessler

Wolfgang Kreitmair-Steck

Mario Hamers

A rotary aircraft which carries a hanging sling load on at least one support cable, benefits from a stabilizer which generates control signals R to be applied or modulated onto the flight control of the aircraft. At least one sling load pendulum motion detecting unit provides the stabilizer with data on the pendulum motion of the sling load. Additionally, the stabilizer is set up with a working range determination unit Sfor determining the space where free movement is possible in which the rotary aircraft with sling load can move without collision. The stabilizer generates control signals R in dependency of the determined pendulum motion of the sling load and the determined working range.

Stabilizer

A regulator device used on helicopters carrying an external load suspended from the helicopter by a supporting cable aids in controlling the flight of the helicopter by measuring the oscillating the movement of the external load, converting the detected variables for the oscillating movement to a geodetic coordinate system, generating a closed loop control signals as a function of the variables, and applying the closed loop control signals to open loop control signals which control the flight of the helicopter.

Regulator device for helicopters

For damping vertical oscillations in a helicopter having a rotor drive-unit and an airframe and carrying an external payload suspended via a lifting gear from a load attachment point on the airframe, oscillation sensors are arranged on the helicopter, and an actively operated linear actuator is provided between the load attachment point and the lifting gear. With the oscillation sensors excitations of a first mode of the vertical oscillations, in which the external load and the rotor drive-unit oscillate together relative to the load attachment point, and of a second mode of the vertical oscillations, in which the load attachment point oscillates relative to the external load and the rotor drive-unit, are sensed, and forces opposed to the vertical oscillations are applied with the actuator between the load attachment point and the lifting gear as a function of the phase and of the amplitude of the sensed excitations.

Growing community of inventors

Braunschweig, Germany

Hanno Brenner