free format * ************* * main data * ************* * * numtcr ieos inopt nmat id2o 3 0 1 0 0 This deck is a test of the results from using Level-P to locate the ultimate gain and period at the ultimate gain. Here the Ziegler-Nichols settings are given to a TRACE PI control block * * ***************** * namelist data * ***************** * &inopts dtstrt=0.01,noair=0,nsend=9000,usesjc=3, numgentbl=0,npower=0,nhtstr=0,iunlab=0 &end * *************** * Model Flags * *************** * * dstep timet -1 0.0 * stdyst transi ncomp njun ipak 0 1 4 3 1 * epso epss 1.000000E-5 1.000000E-5 * oitmax sitmax isolut ncontr nccfl 10 10 0 0 0 * ntsv ntcb ntcf ntrp ntcp 3 5 6 0 0 * ************************* * component-number data * ************************* * * iorder* 11 21 31 41e * * ************************************************** * Starting Signal Variable Section of Model * ************************************************** * Transient Time * idsv isvn ilcn icn1 icn2 1 0 0 0 0 * Collapsed Liquid Level * idsv isvn ilcn icn1 icn2 10 20 11 1 11 * Inflow Velocity * idsv isvn ilcn icn1 icn2 20 38 41 1 0 ************************************************** * Finished Signal Variable Section of Model * ************************************************** * * * * ********************************************* * Starting Control System Section of Model * ********************************************* * ****** Control Blocks ****** * * The following Control Blocks (-30, -40, -45, -100) are a proportional * Controller, setting the inlet liquid velocity. Bias for the controller * is in control block -30, Set-Point (desired level) in control block -40 * and Gain is cbgain for control block -45. * * * Bias for the Proportional Controller * idcb icbn icb1 icb2 icb3 -30 9 0 0 0 * cbgain cbxmin cbmax cbcon1 cbcon2 1.000000 0.0 100.0 12.500000 0.0 * * Setpoint for desired liquid level * * idcb icbn icb1 icb2 icb3 -40 9 0 0 0 * cbgain cbxmin cbmax cbcon1 cbcon2 1.000000 -1000.0 1000.0 7.500000 0.0 * * * Subtract measured level from setpoint level and multiply by the * gain for the controller (cbgain below) * * idcb icbn icb1 icb2 icb3 -45 54 -40 10 0 * cbgain cbxmin cbmax cbcon1 cbcon2 700.000000 -1.000000E5 1.000000E5 0.0 0.0 * * * * Output of the Proportional controller (inlet velocity). Note that * the velocity can not go negative, nor greater than 30 m/s. Also * note that the gain for this control block is not the gain for the * controller. * * idcb icbn icb1 icb2 icb3 -99 3 -30 -45 0 * cbgain cbxmin cbmax cbcon1 cbcon2 1.000000 0.0 30.000000 0.0 0.0 * * PI Controller based on Ziegler-Nichols * * idcb icbn icb1 icb2 icb3 -100 200 10 0 0 * cbgain cbxmin cbmax cbcon1 cbcon2 0.0 0.0 30.000000 7.5 12.5 * CHANGE ABOVE * * First number in the next active card gives the integration time scale * * cbdt cbtau cbwt 100.0 .05 0. * CHANGE ABOVE * ********************************************* * Finished Control System Section of Model * ********************************************* * * * end * ***************** * Timestep Data * ***************** * dtmin dtmax tend rtwfp powerc 1.00000E-5 0.05000 20.000000 10.0 1.0E20 * edint gfint dmpint sedint 100.000000 0.020000 100.000000 100.000000 * * endflag -1.0