Apparatus for improving the longitudinal or pitching stability of aircraft
US4607201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1985 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Aug 27, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0816
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The control of the longitudinal or pitching stability of aircraft is imprd by providing a corrected control characteristic for the correction adjustment drive which is interposed between the pilot operated control stick and the main control drive, for example for the blade angle adjustment in a helicopter or for the elevator adjustment in fixed wing aircraft. A control linkage (2) is connected on one end to a main control drive (4) for the elevator or rotor blade adjustment and at its other end to the control stick (1). The correction adjustment drive (3) is interposed in the control linkage (2). A displacement pickup (5) measures the control displacement of the control linkage (2) and a flight speed pickup (6) measures the flight speed. To improve the control of the longitudinal or pitching stability without having the corrected control displacements of the control stick (1) become too large, a delay circuit (7) and first differentiating circuit (8) are serially connected downstream of the displacement pickup (5). A second differentiating circuit (9) and a linear amplifier (10) are serially connected downstream of the flight speed pickup (6). A first summing circuit (11) subtracts…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.