Flight control system employing complementary filter
US4697768A · kind A · utility
17Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0816
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Strake, flap and canard control surfaces of an aircraft are driven by an error signal which is comprised of a pilot stick command signal and feedback components including measured vertical acceleration and pitch rate of the aircraft and a third feedback component derived from a complementary filter. The filter has a high-pass filter section which operates upon canard position data and a low-pass filter section which operates upon pitch rate. A summation of the signals passing both filtering sections is summed with the vertical acceleration and pitch rate feedback signals to form a combined feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.