| 摘要 |
PCT No. PCT/SE82/00268 Sec. 371 Date Mar. 21, 1983 Sec. 102(e) Date Mar. 21, 1983 PCT Filed Aug. 23, 1982 PCT Pub. No. WO83/00753 PCT Pub. Date Mar. 3, 1983.In tuning a regulator (2) of the PID-type of a process (1) in a feed back system where the process and the regulator has a transfer function G(s) in common, a method is proposed for bringing the system into self oscillation for measuring the amplitude and frequency of the oscillation and tuning the regulator in dependence of the measurements obtained. A circuit function (NL) having non-linear characteristic and a describing function N(A) is introduced into the system in series to the process for acting on the regulator signal (e). Self oscillation is obtained if G(i omega )xN(A)=-1 for at least one value of the angular frequency omega and the amplitude A of the regulator signal (e). An apparatus for performing the method is disclosed. |
