Patent ID: 9695956
Date: 2017-07-04
CPC Classifications: F15B,F16K

Claim:
1. A method for diagnosing a control system using a computer processor in communications coupling with the control system, comprising: using the processor, receiving valve data corresponding to a valve, said valve data comprising at least one of position data generated by a position sensor configured to detect a position of the valve, actuation force data generated by an actuation force sensor configured to detect an actuation force applied to the valve, and set point data generated by the control system to control the position of the valve; using the processor, calculating a frequency spectrum of the valve data and analyzing said frequency spectrum to detect whether or not the valve is cycling; and if the valve is detected to be cycling, using the processor to at least one of adjust the control of the valve to stop the cycling and cause an electronic display to display a notification of the cycling; wherein the cycling comprises at least one of stick-slip cycling, shut-off cycling, and aggressive tuning.