Automatic release of a load from a helicopter external cargo sus

Details Automatic release of a load from a helicopter external cargo sus Automatic release of a load from a helicopter external cargo sus

1994-05-27

1995-11-14

Kashnikow, Andres

Aeronautics and astronautics

Aircraft structure

Passenger or cargo loading or discharging

2441374, 395900, 414 21, B64D 112

Patent

active

054659256

ABSTRACT:
A helicopter external cargo suspension system (12) has load sensors (19,20) at each suspension point for sensing the magnitude of a load (32) at each suspension point. A delay period (FIG. 6) is determined based on the magnitude of the load, and a load is released if one of the following failure modes occurs for a period which exceed the delay period: one of the suspension points is unloaded, the magnitude of the load exceeds a maximum threshold magnitude, or if the distribution of the load, as indicated by the difference in magnitude at each suspension point, exceeds a difference threshold magnitude. If the magnitude of the load is below a minimum threshold magnitude, the load will be carried by one of the suspension points in response to a failure of the other suspension points.
Alternatively, the load information is converted from crisp values to fuzzy inputs (700) wherein the detected values are fuzzified by assigning a membership weight at discrete points or segments on a normalized scale; a new mode fuzzy output (707) is provided by applying a compositional rule of inference (705) across each fuzzy input (702) and a composite mode selection rule base (710), the new mode fuzzy output (707) is converted into a crisp output by taking the weighted sum of the membership weight at each point on the normalized scale in excess of a threshold value (712), and new mode is determined by comparing the new mode crisp output to a set of new mode membership ranges (FIGS. 8e and 9e).

REFERENCES:
patent: 3833189 (1974-09-01), Fowler et al.
patent: 3866200 (1975-02-01), Paredes et al.
patent: 3904156 (1975-09-01), Smith
patent: 3946971 (1976-03-01), Chadwick
patent: 3958165 (1976-05-01), Boy de la Tour
patent: 4048942 (1977-09-01), Cotton et al.
patent: 4225926 (1980-09-01), Wendt
patent: 4350074 (1982-09-01), Rouget et al.
patent: 4480480 (1984-11-01), Scott et al.
patent: 4826109 (1989-05-01), Camus
patent: 5260527 (1993-11-01), Sirag, Jr.

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