# Questions tagged [control-system]

A system that may be electronic circuits or even software that uses control theory (principally differential equations) to control an output by monitoring various aspects of the system under control and varying inputs all towards meeting a defined goal. Some famous examples are controlling a rockets thrust angle to ensure directional control.

827 questions
Filter by
Sorted by
Tagged with
56 views

### How to find the phase of this transfer function?

I have been trying to find the phase of this transfer function: G(jω)H(jω)=0.1695/jω(5.88jω+1) by doing this: Phase = -arctan(0/0.1695)-arctan(w/-5.88*w^2) PHASE = 0-arctan(1/-5.88*w) Is this ...
89 views

### Feedback response in linear system

I have a linear system with transfer function $G(s)$ that is connected in negative feedback with a real value gain $K$. Therefore the open loop transfer function is $K \cdot G(s)$ and the ...
61 views

### Finding the impulse response from the integral

I'm trying to solve the part (a) of the following: I know that: $$y(t) = \int_0^1 \! \delta (t-\lambda ) \mathrm{d}\lambda$$ But I'm not sure how to proceed from that.
142 views

### Closed loop vs. open loop system analysis and design

I have found questions similar to mine in the forum but none were quite answered to my full satisfaction. I have two questions: 1) Why is controller design is traditionally done with the open-loop ...
17 views

### Determining closed loop stability by nyquist criterion

G(s)H(s)=2.2/s(s+1)(s^2+2s+2) how to determine the closed loop stability using the nyquist criterion and how should I start implementing on matlab
34 views

### How can we plot Non minimum Phase system Root Locus?

I have a closed-loop transfer function $$H(s)=\frac{K(2-s)}{s(s+18)}.$$ I know that this is Non-Minimum Phase system, but I could not determine the points that cut through the real axis, the ...
37 views

### Control system basic feedback loop, what's happening at the initial state?

How can the system output be dependent on itself, when at the initial state there is no system output? I don't understand how it can work physically.
48 views

### How to fix triac control module?

This is scheme of triac control module. I'm using optotriac MOC3041 (T1 on scheme) and triac BTA140 (T2 on scheme). Is it possible that my control module doesn't work correctly due to too small ...
147 views

### Best way to track light source?

I want to build a 1-D (azimuth), bidirectional optical tracker. The idea is to have two identical transceiver, mounted on DC servo-motor. The user can move the two servos on rails (reasonably fast), ...
61 views

### How to determine the settling time from a transfer function?

Given the transfer function $G(s)=\frac{(1-\frac{s}{3})}{(\frac{s}{0.1}+1)(\frac{s}{100}+1)^2}\cdot 10$, I would like to calculate the settling time. From what I've learned, this is a third-order ...
42 views

### Is Integral gain much use with a frequently changing setpoint?

I have a motor/encoder setup with a PI loop, where the motor needs to travel to a certain position following an accel/decel profile. The setpoint in this case is position at time T, which changes each ...
53 views

### Help with a Closed loop and zero order hold function ZoH * 1/s(s+a) type

i would appreciate some help in solving this problem, i need to find the transient response for a unit step, i have a brief idea of how to solve, but my graphs in matlab doesnt seem to fit with the ...
118 views

### How does an active filter transfer function translate to a block diagram?

I am having troubles trying to translate when finding a transfer function of an active filter is it in a 'Close loop' or 'Open loop' state? When finding the transfer function of these active op-amps ...
116 views

### Ultra-narrow beam spread LASER diode

I want to build an optical position tracking system based on PSDs (Position-sensitive detectors). I searched online and found this PSD which has a sensitive area of 12 mm*12 mm. My goal is to allow a ...
66 views

### Converting an analog Butterworth filter into a discrete filter

Here again to ask about another question. This time asking how to convert an analog transfer function to a discrete transfer function using standard continuous to discrete methods. The application ...
62 views

### Drawing Signal Flow Graph from Bridged-T Network

I am confused about where to place R1. Is it a feed-forward or feedback term? Y1 and Y2 are admittances representing the capacitors.