Control system actuator position synthesis for failure detection

Details Control system actuator position synthesis for failure detection Control system actuator position synthesis for failure detection

1984-12-20

1987-02-10

Levy, Stewart J.

Measuring and testing

Test stand

For engine

364551, G01M 1500

Patent

active

046415173

ABSTRACT:
Redundant sensed position feedback signal samples of an actuator which are provided in each sample period, a synthesized feedback position signal value provided from an actuator algorithm model. The sensed samples are rejected for use in the sample period if the difference magnitude between the sample value and the synthesized value exceeds an accepted magnitude. The number of sample periods in which a sample is rejected is recorded, and if the number is sufficiently high the sensed feedback signal is rejected from further use and the associated position sensor is recorded as failed. If both sensed samples are rejected in the same period a diagnostic routine determines if the fault is in the sensors or the actuator.

REFERENCES:
patent: 3731070 (1973-05-01), Urban
patent: 4158884 (1979-06-01), McKinley et al.
patent: 4402217 (1983-09-01), Higashiyama

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