A COMPLEMENTARY TRACKING FILTER FOR REMOTELY PILOTED AIRCRAFT

Authors
  1. Aitken, V.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
In remotely piloted aircraft systems, redundant air vehicle position estimates are available. Range and azimuth measurements made by a dedicated tracking system provide an accurate long-term reference, but usually exhibit high frequency noise components. Rate measurements derived from airspeed and heading, on the other hand, can be integrated to yield an accurate short-term reference, but large errors may result in the long term due to sensor bias and wind velocities. A second order, digital, complementary filter that effectively attenuates the noise in both channels is proposed. The filter is developed in an analog form and transformed to a digital representation with conformal mapping techniques. Methods are outlined for preprocessing the input signals to account for unequal sampling rates and to remove false data due to data link corruption or failure. Filter implementations in both rectangular and polar forms are discussed. TRUNCATED
Report Number
DRES-M-1292 — Memorandum
Date of publication
15 May 1990
Number of Pages
27
DSTKIM No
90-03586
CANDIS No
65835
Format(s):
Hardcopy;Originator's fiche received by DSIS

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