Title:
FILTER DEVICE
Document Type and Number:
Japanese Patent JP3218441
Kind Code:
B2
Abstract:
PURPOSE: To suppress noise by obtaining a minimum square recursive curve based on data stored in an observation data storage means and outputting estimate observation data obtained thereby and estimate observation data for high-order differentiation to a Kalman filter.
CONSTITUTION: An observation data storage means M storing plural observation data and a least square arithmetic operation means L are provided before and after data input sections in1, in2 of a Kalman filter F. Then a least square recursive curve is obtained by the observation data stored in the observation data storage means M. Furthermore, estimate observation data Zm1 (t) obtained by the least square recursive curve and estimate observation data Zm2 (t) of high degree differentiation than the estimate observation data are outputted respectively to the Kalman filter F. Thus, even when the number of observation data is less, an output with high noise suppression and high response is obtained.
Inventors:
Yu Fukuda
Application Number:
JP11902692A
Publication Date:
October 15, 2001
Filing Date:
May 12, 1992
Export Citation:
Assignee:
FURUNO ELECTRIC COMPANY,LIMITED
International Classes:
G05B13/02; G06F17/17; H03H21/00; H04B3/04; (IPC1-7): H03H21/00; G05B13/02; G06F17/17
Domestic Patent References:
| JP62244794A | ||||
| JP1316607A |
Attorney, Agent or Firm:
Kazuhide Okada
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