公开(公告)号：US20230400120A1

公开(公告)日：2023-12-14

申请号：US18207929

申请日：2023-06-09

Applicant: SAMSON AKTIENGESELLSCHAFT

Inventor： Andreas Fiebiger ,  Fausto Crespo Vidal

IPC: F16K37/00 ,  F16K31/12

CPC classification number: F16K37/0041 ,  F16K31/12

Abstract: A method for preventing control-induced oscillations in a valve with a pneumatic actuator and position control with an integrating component, including the following steps: Checking whether oscillations of the valve member occur by counting the zero crossings or extreme values of the control difference. If oscillations were detected, it is checked whether they result from oscillations of the set point. If not, the dead zone is increased and/or the gain parameter is decreased. If no oscillations were detected, it is checked whether wear in the drive has exceeded a predetermined measure. If so, the dead zone is decreased and/or the gain parameter is increased. In this way, oscillations caused by the I-component of the control can be detected and stopped. Further changes to the parameters are only made when friction is expected to have decreased due to wear.

公开(公告)号：US12241565B2

公开(公告)日：2025-03-04

申请号：US18207929

申请日：2023-06-09

Applicant: SAMSON AKTIENGESELLSCHAFT

Inventor： Andreas Fiebiger ,  Fausto Crespo Vidal

IPC: F16K37/00 ,  F15B5/00 ,  F15B9/03 ,  F15B19/00 ,  F15B21/08 ,  F16K31/12 ,  G05B11/42

Abstract: A method for preventing control-induced oscillations in a valve with a pneumatic actuator and position control with an integrating component, including the following steps: Checking whether oscillations of the valve member occur by counting the zero crossings or extreme values of the control difference. If oscillations were detected, it is checked whether they result from oscillations of the set point. If not, the dead zone is increased and/or the gain parameter is decreased. If no oscillations were detected, it is checked whether wear in the drive has exceeded a predetermined measure. If so, the dead zone is decreased and/or the gain parameter is increased. In this way, oscillations caused by the I-component of the control can be detected and stopped. Further changes to the parameters are only made when friction is expected to have decreased due to wear.