US 12,241,565 B2
Preventing control-induced oscillations of the position of a valve member in a valve with pneumatic actuator
Andreas Fiebiger, Taunusstein (DE); and Fausto Crespo Vidal, Langenselbold (DE)
Assigned to SAMSON AKTIENGESELLSCHAFT, Frankfurt am Main (DE)
Filed by SAMSON AKTIENGESELLSCHAFT, Frankfurt am Main (DE)
Filed on Jun. 9, 2023, as Appl. No. 18/207,929.
Claims priority of application No. 10 2022 114 745 (DE), filed on Jun. 10, 2022.
Prior Publication US 2023/0400120 A1, Dec. 14, 2023
Int. Cl. F16K 37/00 (2006.01); F15B 5/00 (2006.01); F15B 9/03 (2006.01); F15B 19/00 (2006.01); F15B 21/08 (2006.01); F16K 31/12 (2006.01); G05B 11/42 (2006.01)
CPC F16K 37/0041 (2013.01) [F15B 9/03 (2013.01); F15B 19/005 (2013.01); F15B 21/087 (2013.01); F16K 31/12 (2013.01); G05B 11/42 (2013.01); F15B 5/006 (2013.01); F15B 2211/6303 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/6656 (2013.01); F15B 2211/8613 (2013.01); F15B 2211/864 (2013.01); F15B 2211/8646 (2013.01); F15B 2211/875 (2013.01); F15B 2211/8855 (2013.01); Y10T 137/7787 (2015.04)] 16 Claims
OG exemplary drawing
 
1. A method for preventing control-induced oscillations of a position of a valve member in a valve with pneumatic actuator and position control of the valve member,
wherein the position control of the valve member has an integrating component;
wherein the integrating component of the position control has a gain parameter and a dead zone;
the method comprising the following steps:
verifying the presence of oscillations of the position of the valve member;
in the event that oscillations were detected:
checking whether the detected oscillations result from oscillations of a set point of the position of the valve member;
in case the oscillations do not result from oscillations of the set point of the position of the valve member, increasing the dead zone and/or decreasing the gain parameter;
in the event that no oscillations were detected:
checking whether wear in the pneumatic actuator of the valve member has exceeded a predetermined measure;
if wear in the pneumatic actuator has exceeded the predetermined measure, decreasing the dead zone and/or increasing the gain parameter.