초록 ▼

A device and method that automatically tune a valve controller coupled to a process control loop generate a plurality of sets of tuning parameters for use by the controller, deliver a test signal, such as a blocked sinusoidal signal, to the controller to force the process control loop through a test

A device and method that automatically tune a valve controller coupled to a process control loop generate a plurality of sets of tuning parameters for use by the controller, deliver a test signal, such as a blocked sinusoidal signal, to the controller to force the process control loop through a test cycle while each of the plurality of sets of tuning parameters are being used by the controller and measure a response of the process control loop during each of the test cycles. The device and method then calculate a performance index for each of the plurality of sets of tuning parameters based on the measured responses and select one of the sets of tuning parameters based on the calculated performance indices. The selected set of tuning parameters is then loaded into the controller for use during normal operation of the process control loop.

대표청구항 ▼

[ What is claimed is:] [1.] An auto-tuner for developing a set of operational tuning parameters for use by a controller that receives a reference signal and that develops a drive signal to effect changes in an output variable, the auto-tuner comprising:a tuning parameter generator that generates a p

[ What is claimed is:] [1.] An auto-tuner for developing a set of operational tuning parameters for use by a controller that receives a reference signal and that develops a drive signal to effect changes in an output variable, the auto-tuner comprising:a tuning parameter generator that generates a plurality of sets of tuning parameters for use by the controller during a tuning procedure;a test signal generator that delivers a test signal to the controller as the reference signal during the tuning procedure;a data collector adapted to receive measurements of an input variable and the output variable during the tuning procedure;a performance index generator that determines a performance index associated with each of the plurality of sets of tuning parameters from the measurements of the input variable and the output variable; anda tuning parameter selection unit that selects one of the plurality of sets of tuning parameters as the set of operational tuning parameters based on the performance indices.