Control refers to systems that control other systems, whether that be industrial machinery, lighting or devices used in a home

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A little device to control current flows

I would like to have some advice for constructing a little device. The main purpose is to be able to connect 2 Li-Po batteries in parallel and discharge them in the same fashion throughout the ...
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3answers
55 views

Bi-directional DC Motor Controller

I am using small 1 AMP DC motor the speed of which is controlled by a small controller that actually generates a variable V from 3 to 12V. I can change the direction of the motor by using a DPDT ...
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0answers
14 views

Induction swashplate design reliable?

I "designed" or rather thought up a symmetrical drone design for easy deployment, it's a ball with contra-rotating blades inside that swing outwards when engaged. I wanted to avoid linkages so I ...
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101 views
+100

Controlling electric power steering using an Arduino to emulate torque sensor

I am trying to control an electric power steering rack with an Arduino. To do this I need to "trick" the EPS module that there is torque being applied when there really isn't. On the rack there are ...
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1answer
51 views

Controlling power via code?

I have a lithium battery connected to a 0.33 amp / 12V pump via a connector (which can be changed - this connector option is part of the question). Is it possible to control power to the pump via code ...
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2answers
66 views

Help building a scheme (involves L293D H-bridge)

I'm making a bluetooth-controlled fire truck for my son based on an old wire-controlled truck I bought at a yard sale. It didn't have its wire-remote. I already got Arduino Nano to drive 2 motors ...
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3answers
321 views

Why do linear voltage regulators have minimum output voltage > 0 V

I am trying to pick linear voltage regulator for my project (lab. power supply). I am stunned, that only very few regulators claim to have output adjustable to 0 V. It seems to be due to the fact, ...
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0answers
52 views

Control 12v 5A Pump using Arduino

I am currently developing a fluid controller using Arduino and a 12V 5A pump, whose speed can be controlled by a voltage input. From some google searches, I managed to find a circuit diagram that ...
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2answers
42 views

How to use arduino and P-channel & N-channel MOSFET to control voltage to PT2264 address pins

Im looking to control a PT2264 RF transmitter module from an arduino so that I can transmit to different receivers. To do this I need to supply either +12v or 0v to the various address pins of the ...
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2answers
39 views

Servo does not rotate to the absolute minimum position

I did a bit of Googlin' but I couldn't find anything about this. My hexapod uses analog servos (these ones) to move the legs around. I have the control line hooked up to a servo controller (which ...
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8answers
194 views

Why are there only PID controllers, no PIIIDDD (higher order) controllers?

Transfer function of a PID controller is: \$I\cdot s + P+\dfrac{D}{s}\$ Are there controllers like: \$A\cdot s^2 + B\cdot s + C+\dfrac{D}{s} + \dfrac{E}{s^2}\$ ? If so, are they common? Why do ...
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2answers
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Control: what is the proper justification that you can't just make the output equal to the input if the system produces unstable output

Suppose we have a signal, it goes into the plant and generates an unstable response, a common question then arise at that point is why can't we just set our output to a "hard-coded" input. Think of ...
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How to tune PID for a Y(t) = k*X(t) system?

Could I have your opinions on PID type selection? System description Here comes a very simple system: Output(t) = \$ k * (Input(t) + systemVariable(t)) \$. \$k\$ is constant and ...
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1answer
31 views

Solenoid Valve for Selecting Between 2 Outputs

I'm looking for a solenoid (like) valve which will have 1 flow input, and which depending on the applied signal, will switch between 1 of 2 flow outputs. The electronic equivalent of what I'm ...
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3answers
101 views

Hysteresis control disvantages?

This article gives 2 main disadvantages: Variable frequency Requires ESR on the output cap Is variable frequency a big of a deal? Why would synchronization matters for a converter? And why are ...
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2answers
30 views

Cascade Control System - Multi-Stage Temperature Control

I am new to the forum, hopefully you can help :) I am a software engineer trying to put together a control system. My controls background is not strong, I have really only tuned PID loops via trial ...
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1answer
46 views

Controlling hotplate by power source

I am interested in setting up a control circuit for a system that is heated by hotplates. They are standard lab grade hotplates with dials that modulate heat output (arbitrarily scaled 1-10). In ...
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1answer
43 views

Circuit for controlling 3 DC motors

I have a simple 3 motor robot arm. Without much experience or knowledge, I put together a circuit for controlling it. Circuit is below: Now the circuit actually works and I can program the Arduino ...
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1answer
54 views

PLC with or without PC

I heard from a colleague that typical PLC serve as an interface between a the signals and, for want of a better word, a PC. The connection, being typically done with ethernet, and the PC runs some ...
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43 views

Connecting/disconnecting AC signal via uC

I want to mix up to four AC signals, that may or may not be DC biased, but will always be between -5.6 and +5.6. For that I was going to use a summing amp. (If anyone wants to talk me out of that in ...
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2answers
60 views

how to map a pid controller to a process

How do you "map" the output of a PID controller to a process? Say you have a resistor, a thermometer, and a PID controller. The thermometer provides feedback, and the PID controller can control the ...
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1answer
67 views

So how do control engineers control nonlinear plant with exponential output?

Say that a system (circuit, pump, population model, etc.) has a exponential output of the type $$y = ae^{bx}$$ What do control engineers do in order to achieve control objectives such as tracking and ...
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92 views

Is control theory too abstract? [closed]

What do engineers think about the application of control theory? Is it exaggerated? Is the math too overwhelming for real life application?
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25 views

AC servo motor PR position control mode

I have a delta A2 servo motor datasheet and I want to ask about the PR control mode, I know that there is some parameters related to the control of such mode (P6-00 ~ P7-xx) but how to command the ...
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1answer
58 views

DC DC converter control design, PID vs compensators

I have to make a dc dc converter to power a resistive load, and I have reviewed various applications notes, and applications reports like SLVA633 and SLVA662 They make uses of an compensator design ...
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24 views

Altium: Version Control Error

Once upon a time I created version control for my project file KHS_PLD_XADE_EM and located it in one of my folders. One day as I was working on my project, I noticed the green check marks for ...
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2answers
73 views

Find system behavior: P or I type?

In control theory, how do I find out of which type a system is? P-type or I-type (P = proportional and I = integral) Consider the following nonlinear system with x as output: $$ \dot{x} = A(x) + Bu ...
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1answer
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Control systems Engineering [closed]

I am a third year student in Electrical Engineering, and I would like to get into Control systems. I was reading about the job ads and I noticed that I need to know PLC and HMI. I don't know if they ...
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2answers
83 views

Transfer Function Identification from Impulse Response

I'm working on a system involving a stepper motor that is used for moving a carriage back and forth in a linear motion. I have recorded the response (i.e. carriage position vs. time) corresponding to ...
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1answer
33 views

Control Design: Continuous State Space vs. Digital State Space --> Feedforward Path

I have a question regarding the state space representation of a model. I created a continuous model of my plant in Simulink, which does not contain a direct path from input to output, i.e. the D ...
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55 views

Interfacing Constant Current to a Microcontroller

With reference to the circuit below, How can I control the SET from a Microcontroller? It really needs a variable resistor attached. I've looked at digital POT's although it would need to be ...
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6answers
960 views

PID algorithm: how to account for fast input value changes after a long delay

I am trying to implement a basic PID algorithm on an Arduino Leonardo to mix hot and cold tap water using servo-controlled valves. The goal is to hold the temperature as close to a setpoint as ...
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81 views

Load sensing switch

I made the circuit here to automatically switch on my workshop dust extractor when I use a power tool. It works fine when used with a drill press or router. However with a Dremel 4000 it only switches ...
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1answer
64 views

Design of PID control for a vibration exciter (shaker) without having the plant model

I want to design a PID controller for a shaker. But I don't have the system's differential equation or transfer function. I find the system identification algorithms complicated. Can I design a ...
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41 views

I've got way too high voltage after the transfer function. Why?

I want to control a simple control system with Raspberry Pi and Matlab. The charactheristic of the system : -Control system’s output voltage range: -12V – 12V -Analog-to-Digital converter’s input ...
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1answer
62 views

Is it possible to transfrom a transfer function into voltage?

So I have a control system which I'd like to control externally. I have the error signal from the system and I use an ADC to convert the signal to number. I have the transfer function of the system ...
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1answer
227 views

Zero-order hold discretization?

I have some difficulties understanding something. There are several discretization methods, such as zero-order-hold (ZOH), forward euler, backward euler, tustin, et cetera. Forward euler, backward ...
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47 views

Is hardware handshaking not available when using a USB to RS232 adapter?

As far as I understood there is two type of hand shaking. Hardware and software. For hardware handshaking other pins of RS232 connectors used. Does that mean of we us a USB converter we cannot ...
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1answer
75 views

Drive 8 Stepper motor simultaneous with different motion?

I have the need to drive 8 stepper motor together and with different motion behavior for each. Could I just get away with 8 stepper control board (easy driver) + an Arduino with enough pin to get the ...
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36 views

Controller/Actuator for cold weather

I am working on a project that uses a control algorithm run on a PC, output over serial to a microcontroller which in turn positions external venetian blinds (both tilt and lift) on a home for 8 ...
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46 views

Is it possible to replace tact switches with a rotary encoder for volume control?

I asked here before if it's possible to use 2 rotary encoders at once (Is it possible to use 2 rotary encoders at once?), but I've dicarded that option, so I can still have the front of my radio ...
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0answers
27 views

Stablization of a $w$-system

I have the following system to be stabilized: \begin{equation} \begin{aligned}\dot{w}=Aw+Bv \\& A=\left( \begin{array}{ccc} 1 & 1 & 2 \\ 1 & 2 & 3 \\ 1 & 2 & 0 \\ ...
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1answer
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Why isn't the Fourier transform of a single sine wave cycle a single bar?

I have tried different Fourier transform codes out there on single sine waves, and all of them produce a distributed spectrum with a resonance at the signal frequency when they should theoretically ...
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1answer
182 views

MATLAB error: “acker” function not returning the same thing as ackermann's formula

I have a discrete time system Suppose I have the following AB matrix of my system $$A = \begin{bmatrix} 0 & 1 \\ 1 & 1.5 \\ \end{bmatrix} $$ $$B = \begin{bmatrix} 0 \\ 1 \\ ...
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4answers
159 views

Is it possible to use 2 rotary encoders at once?

I'm working on this project: http://www.corsaclube.com.br/viewtopic.php?t=102183 I'm basically installing an iPad mini on the dash of my new car, but I'm facing a problem: The iPad doesn't offer ...
0
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1answer
341 views

What's the relationship between ESC pwm input and output?

I'm using ESC(Electronic speed controller) to control outrunner brushless dc motor. As you know ESC detects ppm signal between 1ms and 2 ms approximately. So my ESC detects signal between 4% and 9% ...
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1answer
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L293ne wireing help

First real project in many years so please accept my apologies of this is a silly question. I want to use the L293 to drive a motor (or 2). Using a raspberry pi which I have done using the add on ...
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2answers
379 views

How To Interpret PID Output in a Slow Response System

@Update: A few days have passed since I asked this question and I've had a chance to do some research based on the answers I've received from @R Drast and @Spehro. I'm not sure this update is the ...
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Controlling Linear Actuators

I have two 24in linear actuators (http://www.progressiveautomations.com/linear-actuator) that run at different speeds when I connect them in parallel to a 12V battery. How can I get them to run at ...
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2answers
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What are some of the real life example of the so called “tracking and regulation” problem in control theory?

Given a plant, we need to design a controller that takes in an input r and then ensure that steady state error between the output and input goes to zero while the system remains stable. What is a ...