3

Your systems shows extremely close pole-zero cancellation. So much even that it nearly removes 4 poles and zeros. Lets look at why, starting with the Bode plot: The magnitude plot is constantly decreasing with a slope of -40dB/decade. Following basic rules this already implies that at the given frequencies, the system can be approximated using a double ...


2

The most precise way to control flow is with valves/flow regulator. The main problem is the cost. Although, its a very basic component and its not too costly if you have too many outlets the cost will pile up. Even if you had matching orifices, you might have issues with the pressure drop inside the pipes and corners. Another way to control the flow would ...


2

One basic way is to adjust the valves, the dry ones fully open and the ones bleeding all the pressure just slightly open, or even restricted permanently by a smaller size bushing just before the valve. In conjunction with that, you can install a water tank between the pump and your network with an adequate head and a hydraulic actuator to stop the tank's ...


1

A transfer function of a closed-loop feedback control system is written in the form: $$ T(s) = \frac{H(s)}{G(s)} $$ where $G(s)$ is called the characteristic polynomial of the system. The poles and zeros of the system are defined: Zeros $\rightarrow$ Roots of $H(s)$ Poles $\rightarrow$ Roots of $G(s)$ The stability of the closed-loop system can be ...


1

Creating an output from 2 inputs won't have more precision; it will have 2 sources of error. If you are trying to control relative humidity, then using that as your control variable only makes sense.


1

You are allowed to claim 2 BPCS IPL's but not from the same BPCS, eg you will need a PLC and a DCS with an IPL in each to claim both of them, plus they must be adequately independent. Additionally, you will be capped at a RRF of 10 for each, giving 100 for both, but that could be the difference between a SIL 3 SIF and a SIL 1 SIF in the SIS, potentially.


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