Electricity: motive power systems – Positional servo systems – 'feelback' systems
Patent
1985-08-27
1986-08-19
Dobeck, B.
Electricity: motive power systems
Positional servo systems
'feelback' systems
318584, 318586, 318646, 244223, G05B 1101
Patent
active
046072020
ABSTRACT:
Control force errors are automatically eliminated in aircraft, especially licopters. Such errors may occur because of disturbing forces that act on a control stick (1) for the elevator and/or rotor blade adjustment. The following features are combined. A main control drive (3) for the adjusting of the elevators and/or rotor blades is connected through a control linkage (2) with the control stick (1). A spring box (5) with a pretensioned spring (17) is connected through a control rod (14) to the control stick (2) and to one end of the spring box (5). A trimming rod (15) of a trimming motor (4) is operatively connected to the other end of the spring box (5). To compensate the disturbing forces caused by the inertial mass forces acting upon the control stick (1) as much as possible there are further provided two displacement pickups (6) and (7) or a single displacement difference forming pickup (16). A first summing circuit (8) receives the output signals from the two pickups (6, 7). A control force pickup (10) measures the pilot's hand force (P.sub.H). A signal limiter (12), an amplifier (11), as well as further summing circuits (9) and (13) are used to produce a compensating or correcting feedback signal supplied to a control input of the trimming motor in a closed loop control circuit.
REFERENCES:
patent: 3476335 (1969-11-01), Andeen et al.
patent: 3700995 (1972-10-01), Parkinson et al.
patent: 4106728 (1978-08-01), Griffith
patent: 4228386 (1980-10-01), Griffith
patent: 4345195 (1982-08-01), Griffith et al.
Dobeck B.
Fasse W. G.
Kane, Jr. D. H.
Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftu
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