| 摘要 |
PURPOSE:To find an accurate proportional integral and differential (PID) parameter without exerting an influence upon processes, by generating repetitive pulses as an operation output used when PID parameters of respective operations are found. CONSTITUTION:For example, when a changing-over switch 3 is placed at the side of an automatic parameter regulator and controller A, an operation output X from a repetitive pulse generator 2 is supplied to a process 1 and a process model computer 4. The process 1 outputs an answer output Y, which corresponds to the operation output X, to the computer 4. The computer 4 samples and measures the outputs X and Y in each period to calculate a gain, waste time, and temporary delay constant, and the best PID parameter of the process 1 is calculated and supplied to a PID controller 6. Consequently, since the integral value of the operation output becomes zero, an influence upon a process to be measured is less to attain stableness, and the answer output is a repetitive output, so that the accurate PID parameter which is never influenced by disturbance is calculated. |
