Realization of PD Controller using Analog Electronics | Calculations & SPICE Simulations | Example 2
In this video, we will discuss an example to realize a PD controller. From the given transfer function of a PD controller, we will determine the PD controller high-frequency gain and the PD controller zero. We will use analog electronic components (op-amp, resistors, and capacitor) to realize the PD controller transfer function. The given PD controller transfer function will be compared with the transfer function of the analog electronic circuit. By comparing the terms of both transfer function, we can determine the values of the components.
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Пікірлер: 2
I have a question, why is this possible? What I've been told so far is that in real life you cannot implement a PD since you have a zero without a pole, and a system in order to be physicially possible the numer of poles needs to be greater than the number of zeros. Also what I've always been told is that in order to be able to do a PD in real life, you must add a pole, leaving you with the following expression: Gpd(s)=(Kc·(s+z))/(s+p) Could you please clarify my question? Thank you in advanced :)
@CanBijles
10 ай бұрын
Thanks for your message. Indeed, a practical PD controller requires a pole to reduce the high-frequency noise. The location of this pole will affect the PD action, so ther depends on the system requirements.