Search results for query: *

delay block?

I used a type of loop which used a clock and a comparator to keep a state for a given number of steps. Otherwise you need to use discrete state s-function probably. if you post your e-mail I will send you the mdl. Ollie

Thanks MVD We are using feedforward with the gain adjusted by a feedback loop currently, but the feedforward does not take account of delays (which are a similar Tc to the process changes). A bit of modelling suggested moving the instruments and using cascade control would be better. Anyway...

We have to control HCl, SO2, NOx, NH3 among others in flue gases. The controllers are all independent PI loops basically. The disturbances are very large, sometimes unmeasured. The APC system is highly non-linear with delays in measurement and control. Surely some sort of MIMO adaptive...

We recently replaced the OIS units with iFix SCADA running on W2k, as the console boards were getting more and more expensive and harder to find. This applies to the DCS too, we would consider replacing with PLCs but this is too big a project at the moment. Would be interested to hear if you...

Have you tried the linmod function? Also the linear analysis option? Didn't work for me yet but my system is non-linear, you may be OK. Oliver

What are you planning to use - C, Fortran? How complex is the algorithm? regards Oliver

in matlab put c=[a;b] in simulink use the Mux (multiplex) block. Ollie

I may be an easier way but maybe you can use a switch to check if the actual position is different to the desired actuator position, selecting between +ve and -ve constant values that can output to an integrator. This would then increase or descrease the actuator position until the error gets...