A control system regulates the behavior of other devices or systems, usually using a control loop.
Examples are a home heating controller using a thermostat, a regulator keeping a drone stable, and industrial control systems used for controlling processes or machines.
After taking classes in control theory as an undergraduate, I ended up not using them at all after I graduated. I've started to fix that by starting a hobby project in controls. My textbooks are pretty good references for the theory, but my biggest…
When we take the Laplace transform of a function, why is the frequency (s) complex? I can not understand the significance of complex frequency.
Please help or give some references.
I cannot understand what the arrow that goes through "internal model" block mean? how can I interpret what does it do? What is the difference from any other "normal" arrow?
(source: cam.ac.uk)
I'm trying to understand something very basic about Control Theory. Let's say I have the following loop:
If we'll relate this loop to a cart with a motor going in its single axis from X = 0 to X = 50, the controlled variable will be the engine…
I have two questions:
Why we study stability in open loop rather than closed loop (which is the system that will be implemented).
and is there a relation between response time in closed loop & open loop (I know that this depends on the system, but…
I am trying to find the rise time expression of a critically damped 2nd order system. I am not used to manipulating the inverse Laplace transform and to me it is clearly not easy. It appears that the expression that I found on the internet depends…
I have a hard time understanding the differnce between the two techniques that are introduces in my textbook, a PID controller and Lead/Lag compensation.
Ultimately we add a new box to our "loop" and change the transfer function of our system(by…
While I am well aware of some of the technique about implementing transfer functions I wanted some input about how can i realize this transfer function with active filters (OpAmps are preferred):
1) $$
\frac{1} {(1-sT)}$$
it is unstable, it should…
I know the the structure of a 3rd order system is:
\$Q_s=(s+a)(s^2+2\xi\omega ns+\omega n^2)\$
but what do I do if I have something like this?
\$Q_s=(s+4)(s+5)(s+3)\$
How do I measure its natural frequency?
I have a 110v spa pump that is itself controlled (on/off) by an air switch. I want to install a spa heater that is 220v, but when I purchased the heater I didn't realize that the heater should only come on when the pump is on. In other words, if…
A professor is writing the general form of a Transfer Function as:
$$H(s)=k\cdot s^{l}\cdot \frac{\prod\limits_{i=1}^{m}\left(1+\frac{s}{z_{i}}\right)}{\prod\limits_{i=1}^{n}\left(1+\frac{s}{p_{i}}\right)}$$
but in every book and in every source…
I remember being taught in our control engineering classes that one of the advantages of synthesizing controllers using root locus over synthesizing controllers using Bode plots is that RLOC can be used with non-minimal-phase systems.
Bode plots of…
I would like to study how a system responds to a step input of 3V.
My idea was to use Laplace transform. So I need to get an LTI system of my system which is not linear. To make it linear I need to go into small signal analysis. As around a DC point…
