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  1. Regensteiner

    How to calculate maximum error?

    Hi, I am wondering how I can calculate the maximum error of a measurement chain. If I have a voltage transducer with a accuracy of +-1%, which is wired to analogue input of a PLC (12 bit), what's the error of it? The output of the transducer is 0-10V so as the input. Cheers, Lars
  2. Regensteiner

    Simulink: How to optimise simulation model for annual simulation?

    Hi, I am working with simple energy model composed of a PV, loads and battery. The model is fed by measured data (sample rate one minute). The battery model (input AC power set-point, output AC power) was tested separately and it includes a power control algorithm (PI) and max. voltage control...
  3. Regensteiner

    parameter estimation of heat energy balance by using lsqcurvefit

    Hi, I have the following problem and maybe someone can give me a clue how to solve it. I have collected data (Temperature, Q_gen, Ambient temperature) of a heating process and now I want to estimate some parameters in order to solve the energy balance. This is the energy balance: internal...
  4. Regensteiner

    Control of Process with dominant deadtime ---> Step response test parameter estimation

    Hi Peter, thanks for the information especially about Scilab. I haven't heard about it but I discussed it with a colleague and we agreed on to check this open source tool. However, I am going to estimate the parameter to get an IMC based PID. But I have one question about how to calculate the...
  5. Regensteiner

    Control of Process with dominant deadtime ---> Step response test parameter estimation

    Hello Peter, many thanks for your reply. I haven't worked with internal model control so far. But I would like to learn more about it. Do you have a simple example how to enhance a PI controller to IMC? What do you mean by "move your control signal more", to use a higher step? Regards, Ossi
  6. Regensteiner

    Control of Process with dominant deadtime ---> Step response test parameter estimation

    Hi xnuke, What do you mean I am confusing t and T. Could you please give me an example where this is. You are completely right that the time vector is wrong it should be 0:0.5:19 the sample time was 0.5 seconds. Thanks for the link I will check it...
  7. Regensteiner

    Control of Process with dominant deadtime ---> Step response test parameter estimation

    Hi, I'm a newbie using matlab and to deal with system identification. But as it happend I have to tune a PI Controller for a process. So I thought a open loop test like a step response test is sufficient. I carried out the following test: set the control signal to a fixed value and see what...
  8. Regensteiner

    Implementing Area Method: Step Response Test

    it should be: L=1.7 K=1.4/6 T=1.325
  9. Regensteiner

    Implementing Area Method: Step Response Test

    Hi, I'm a newbie using matlab and to deal with system identification. But as it happend I have to tune a PI Controller for a process. So I thought a open loop test like a step response test is sufficient. I carried out the following test: set the control signal to a fixed value and see what...
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