| 摘要 |
In a direct digital control system, a pulse test method is provided for computing data which can be employed to revise tuning coefficients used in the process model. On initiation of the test, the direct digital control operation is suspended and the controlled variable is pulsed. Revised tuning coefficients of the mathematical model defining the control loop are computed from detected changes in the measured variable. These coefficients can be inserted into the control loop model to provide more accurate process control.
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