Adaptive control system input limiting
AssigneeUnited Technologies Corporation
InventorsDon L. Adams, Sr., Stuart C. Wright, David J. Verzella, Troy J. LaMontagne
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Abstract
A control system, having an input command signal and driving a prime mover, is provided with variable magnitude and/or rate input signal limiting that is adjusted by maps 68,70,72,74 which set the limits for a variable magnitude limiter 14 and a variable rate limiter 22 as a function of the prime mover rate. The limiting is adjusted dynamically as the prime mover rate changes. When the prime mover enters an undesirable operating condition, the maps only limit the command signal in the direction of such condition. The adjustable limiting is enabled or disabled based on the position, rate, and/or acceleration of the prime mover.
Claims8
An adaptive control system input limiter, comprising:
- a control system providing output drive signals in response to an input command signal indicative of the desired output of said control system;
- a prime mover, responsive to said output drive signals from said control system;
- an input limiter, responsive to the status of said prime mover, for limiting at least one parameter of said input command signal to a predetermined value when said status of said prime mover approaches an undesirable operating condition, said limiting being solely along the direction of said undesirable operating condition, and said predetermined value being related to prime mover rate;
- and
- said input command signal being a percent pitch command for a helicopter.
Dependencies are inferred from the claim text.