초록 ▼

A method for determining the performance of a control valve in a closed control loop by using a simulation model. A simulation model of a process control loop is provided, consisting of a unit process (2) including the flow equations of the valve, a process controller (4) and a process transmitter (

A method for determining the performance of a control valve in a closed control loop by using a simulation model. A simulation model of a process control loop is provided, consisting of a unit process (2) including the flow equations of the valve, a process controller (4) and a process transmitter (3), to simulate a process with disturbances (6, 6'). The simulation model is connected to a real control valve (1), including a valve, an actuator and a positioner. The valve response is measured. The process variability during the process is determined.

대표청구항 ▼

[ We claim:] [1.] A method for determining the performance of a control valve assembly in a closed control loop, said method comprising:a) selecting a mathematical part of a simulation model of a process control loop, the model including a process variable, flow equations for the control valve and p

[ We claim:] [1.] A method for determining the performance of a control valve assembly in a closed control loop, said method comprising:a) selecting a mathematical part of a simulation model of a process control loop, the model including a process variable, flow equations for the control valve and pipeline behavior features, a process controller, and a process transmitter;b) connecting the mathematical part of the simulation model to the control valve assembly having a control valve, an actuator and a positioner;c) supplying actuating energy to the positioner;d) measuring the valve position;e) simulating a process control loop with disturbances; andf) determining the process variability during the process, wherein the performance of the control valve assembly is evaluated as the process variability.