Apparatus and method for preventing runaway of the integral term of a proportional plus integral controller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 14, 1993
Grant Date -
N/A
app pub date -
Feb 27, 1990
filing date -
Feb 27, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method are provided for preventing the runaway of the integral term of a proportional integral differential controller which is usable in a feedback system. An error signal is supplied to the controller by the feedback system. The controller produces a control variable output signal from the error signal. In accordance with the invention, the controller imposes a slew rate limit on the control variable output signal. Also in accordance with the invention, whenever the controller attempts to drive the control variable output signal to exceed the slew rate limit, the integral term associated with the controller is adjusted to a value which forces the control variable output signal to its slew rate limited value. In this manner, runaway of the integral term associated with the controller is desirably avoided.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully