Can anyone tell me how I can define my P I and D parameters in Simulink. If I change my parameters of my PID-regulator, my proces value graph changes very much with each change of PID values. I tried to use Ziegler Nichols but it gives very bad results. I need to know a method how I can...
Hello,
I have a question. How can I simulate a linear actuator? This actuator gets a signal between 4...20 mA and it takes 6sec to open the actuator complete. So for example, if I have a signal of 12 mA and i go to 20 mA it should take 3sec to go to that value. How can I build such a model...
hello,
I have a guestion. Different producents of valves give the flow caracteristics for Kv values. I need to kwow if these caracteristics stay the same if i use air as medium.
Example: if i have a linear flow caracteristic for %opening of valve versus %Kv, does the caracteristic stays linear...
Hello,
I need to simulate the working of a control valve (all kinds of valves) and then I need to analyse the results of the different types of valves to choose the perfect one for my application. So I thought to simulate a constant flow, then the caracteristic of the control valve, and at the...
Hello,
I'm looking for an equation which shows a relation between the fact that when the density of air becomes larger the flow through a centrifugal compressor increases
For example: the flow increases with a factor 1.15 from 35°C to 5°C.
This is with constant pressure of the compressor...
Hey,
I have a question to anyone who can answer me.
I need to choose a valvetype which fits the most in my application and why.
I have a compressor who delivers a constant flow. On the other side I have clients who use a variable flow but NEED a constant pressure. I need to place a valve in a...
Hello,
can anyone tell me the Kv equation for air. All the equations are for water and I would like to calculate it for air. And in the equation the term DeltaP (pressure drop) what does it stand for. Is it a property of the valve itself and how can I find the term???
Thanks a lot
