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

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Is there a change in the voltage/current when motor is locked up? How can one sense this?

I am working on a motor control system, and I'd like to be able to know when the motor has reached its max output and has locked up (shaft no longer able to rotate, due to mechanical force pushing ...
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1answer
47 views

Electric style motor speed control [on hold]

I was just wondering how I would go about making a pedal that controls the speed of a motor. It would also have to include reverse motor capability. My tech book at school already has a circuit for ...
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0answers
11 views

PM Synchronous motor Id-Iq current control

I am trying to implement the current control (Id, Iq) of a four pole PM synchronous motor. I am having trouble in making the Iq current follow a set reference. I had also implemented a cascaded ...
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0answers
20 views

How do I power / control a brushed 115V AC motor?

How do I power a brushed 115v AC motor? Would there be any potential damage from just wiring it to just plug into the wall or do I need a transformer and a capacitor or something? Thanks!
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2answers
115 views

How do electrical engineers actually apply control theory in real life?

I am currently taking a course in control theory. In control theory the system or impulse response is usually an algebraic expression in Laplace domain. Much of the work done in school is to find ...
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3answers
61 views

H-Bridge with 1 PWM and 1 Output

I'm looking for a solution to control the direction of a powerful DC Motor. I came up with the idea to use a H-Bridge. Since the motor uses up to 3.2A the amount of possible H-Bridges is quite ...
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0answers
32 views

BLDC speed/torque control with L6229 or L6235

I'm trying to control 12V 12,000 rpm BLDC motor with 3x120° Hall sensors using ST evaluation board based on L6229 IC. I tried to control motor's speed by feeding PWM to FWD/REV pin as suggested in ...
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1answer
50 views

High Voltage Triac Control

I'm trying to control a universal motor run from a 240V power supply using a micro-controller. There is a existing PCB that uses a potentiometer to vary the speed that I am trying to replace. I've ...
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3answers
72 views

Push power assisted trolley with one finger

I recently saw a demo. One man pushed a power-assisted trolley using only one finger. The trolley was loaded with ~40kg stuff and it started from standstill on a up-slope when the man pushed it using ...
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1answer
66 views

Control theory: What is the physical interpretation of asymptotic stability

For Bounded Input, Bounded Output stability (BIBO), there is a very nice interpretation. All it means is that if for any finite signal the system produces a finite output signal, then the system ...
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1answer
44 views

Volume control?

Thank you for looking at my question. I have an electronics background from the military but I'm no engineer. I am trying to design a sound system with remote wired volume control in a chair. There ...
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0answers
31 views

Control Steps of “SUB R1, [[R3]]” for Intel 8086

Question What are the control steps for SUB R1, [[R3]] for Intel 8086? I do not know how to obtain the content of the address twice. I guess that maybe I should put two \$MAR_{in}\$s like the ...
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1answer
50 views

Possible methods to control the voltage of a variable 3 phase power supply for an electromagnet?

The only solution I can think of is a three phase variable transformer, are there other methods? If so, what is the standard or accepted method to control the voltage of a variable 3 phase power ...
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1answer
37 views

position control mode of industrial servo motor

I have searched alot about industrial servo motors and their application but the problem is about the pulse command used in position control mode, can I use a 555 timer for the generation of such ...
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1answer
52 views

Completing circuits with transistors and arduino

Hello and thanks to anyone who helps. I am trying to create a test bench for a control board we commonly work on at our business. One control board has 11 pins that a ribbon cable would be connected ...
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1answer
132 views

What's the Laplace transfer function of a moving average?

What is the Laplace transfer function of a moving average? $$y_k=\frac{x_k+x_{k-1}+x_{k-2}+x_{k-3}+...+x_{k-N+1}}{N}$$ I tried to get it from the z-domain transfer function using conversion tables: ...
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0answers
20 views

PID contollers and MIMO systems [duplicate]

I have a system which in state space model. There are 3 state variables and first I will make a solution without using any controller, in this case I have 3 input (u) U1=10,U2=0 and U3=5 , in this ...
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1answer
34 views

Reading USB Relay Specifications

Good morning, I am trying to work on some home improvement DIY projects and trying to control light from an RPi / Arduino using USB connection. I've found two possible products, that I think might ...
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3answers
415 views

MOSFET overheating in pwm control

I'm using a MOSFET to switch a 24V, 15A load, with the gate input being a 500Hz PWM signal. However, this is causing the MOSFET to overheat and blow. Any suggestions would be appreciated. R1 = 100 ...
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2answers
162 views

Obtaining Poles and Zeros from frequency response

What is the process of obtaining the poles and zeros from frequency response plot or data. Any reference or Matlab code will be great help
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3answers
94 views

What is the effect of aliasing in discrete time controller?

Suppose we have a controller whose TF is $$ G(s) = \frac{1}{(s^2+1)} $$ This yields two marginally stable poles at \$ s = \pm j \$ Now let's discretize the controller through z transform, after ...
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1answer
39 views

Pump control system without arduino

So i saw this schematics i pretty much understood it all, the comparetors, the sensors, the variable resistors , but because i am a beginner i still dont understand some things. 1- why did he use a ...
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1answer
55 views

Robotics Experts: How to do trajectory planning for a robotic arm

I have a homemade 3D printed prosthetic robotic arm similar to the picture below Right now this is completely open loop control system. The elbow, wrist and base can only rotate in around its ...
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205 views

How to design controllers “properly”?

It may sound like the "easy way" to ask it here, but this question (along with a couple others I've posted which were more specific) is the result of years of research on the topic - on and off as ...
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1answer
65 views

Lead-lag process control

What is the locus of the following system, and for what value of \$\alpha\$ is the damping ratio 0.5?
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1answer
50 views

What is the “Home” feature of the Stepper Motor Driver IC (DRV8811)?

While doing research on efficient methods for driving stepper motors I came across the Texas Instrument IC DRV8811. This particular device has a Home feature that is explained very little. The ...
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1answer
45 views

Is this sequential function chart correct?

I have to draw the sequential function chart of a robotic arm which in the beginning of a process is in the position A. If it gets an impulse from the sensor S1 it moves to the left and for 5 ...
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4answers
90 views

Can gain and phase margins be obtained from step responses?

We need to comply to specific gain and phase margins requirements whereas the controller has been tuned on-line without knowing the plant transfer function (in order to save time). The response does ...
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0answers
41 views

Controlling Raspberry Pi GPIO using Javascript [closed]

I am familiarizing myself with the GPIO pins on the Raspberry pi and was wondering what the easiest way to control them would be using HTML and javascript over a webpage. My intent is to have a button ...
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2answers
218 views

control AC fan speed using microcontroller

I have been trying for a long time to digitally control the fan speed and light intensity of a dimmable LED bulb, but I am not able to. Basically I want to replace the mechanical potentiometer with a ...
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3answers
47 views

Does this article's appendix contain an error (is the heating system described integral control)?

I am confused by the primer on control theory found at the end of the following paper, which concerns an instance of integral control in a biological system. Since it concerns integral control, I ...
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1answer
161 views

Arduino Motor Control Circuit with Power Transistor and H-Bridge

I'm new to motor control, and I'm trying to create a circuit to control this motor: http://www.robotshop.com/en/banebots-rs-550-motor-12v-19300rpm.html The key electrical characteristics for my ...
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52 views

Using a suitable Compensator problem - Control Theory

Problem: \$\,\,\,\$ A system is described by the open loop transfer function $$\frac{k(s+2)(s+7)}{(s+5)(s^2+2s+5)}$$ Design a suitable compensator in order to have \$w_n =\sqrt{10}\,rad/s\$ and ...
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0answers
54 views

Combine Bluetooth Buttons (Volume up / Next, Volume Down / Previous)

I have a question regarding the control of a bluetooth device, which I would like to connect to some old headphones. Bluetooth SMD Module - BC127 There are some pins on which I can connect the ...
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2answers
63 views

A relay for each terminal (live and neutral)

I'm investigating a control circuit that switches a heating element. From what I can see there is a relay on both the neutral and live to the heater. The relays are controlled together and cannot ...
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3answers
84 views

What is the name of a component that combines a switch with a variable resistor?

I had some lights with a rotating switch that would turn them on/off, and then continuing to turn the switch would make them brighter. What sort of switch is this called? (it had a physical "click" to ...
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0answers
34 views

Reaction vs Rotary torque sensor for force/impedance control

I am working on a robotic system that is requiring a torque feedback from a rotational (single axis) joint for a force or impedance control loop. When researching the available torque sensors I've ...
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1answer
103 views

High Power H-Bridge with IR2125 Drivers Problem

I'm currently stuck on a problem when trying to drive a 140V DC motor using an H-Bridge with 4 high-power mosfets and 4 IR2125 drivers. I'm using as input to the drivers a signal generator of 5V in ...
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1answer
30 views

In adaptive signal processing, what does it mean for an arrow to go through a block?

For example, in this case the FIR digital filter has an arrow going through it. This is common in the signal processing comunity but very unintuitive from a control perspective i.e. where is the ...
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40 views

Adapt servo for torque input

I want cheap motors to reach a reference trajectory (positions, velocities, accelerations) and use torque as input for the system. This is intended for rapid movement reproduction. I would like to ...
2
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3answers
262 views

How does the automatic garage door opener know which button I've pushed on the wall control panel?

The wired wall control panel in my garage has only 2 wires connected to it. Yet somehow it acts different when I push the big "door" button than when I push the "light" button or the "lock" button. ...
2
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1answer
110 views

Loop gain(s) for multi-loop circuits

With the aim to combine some good properties of two different opamp types we can make use of the composite amplifier principle (see the figure). For example, we could combine good (small) input offset ...
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133 views

What is a Thyristor Switched Series Capacitor (TSSC)?

I'm struggling to understand the physical difference between the Thyristor Switched Series Capacitor (TSSC) and the Thyristor Controlled Series Capacitor (TCSC). From this book, I understand that a ...
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1answer
100 views

What is the difference between disturbance and noise for dynamic systems?

In most references from dynamic system theory, the following linear continuous dynamic system is considered. $$\frac{\text{d}x(t)}{\text{d}t}=Ax(t)+Bu(t)+Dd_{1}(t)\quad (1)$$ $$y(t)=Cx(t)+Ed_{2}(t) ...
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2answers
158 views

Controlling DC motor without Arduino motor shield

I am trying to make a line follower with the help of this tutorial. In the tutorial they have used Arduino motor shield. I want to know, is there any way to control the motors without using Ardumoto? ...
4
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3answers
164 views

Is it possible to determine load on a stepper motor when stopped

Is there a way that the torque on a stepper motor can be determined without some kind of additional force sensor. Additional electronics such as current shunts etc would be acceptable. I would like ...
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1answer
97 views

control circuit of a humanoid robot (something like i-cub or Asimo)

my friend and I are building the upper body of a humanoid robot for our MSc thesis project. There are 24 dc motors in this robot the thing I want to know is what is the best way to command these ...
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4answers
86 views

Electrically control material to channel light from specific angle

I am wondering if there is any material that can be electrically controlled so that light from a specific angle or diretion is received. Is it possible to manufacture such materials using ...
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418 views

Making a simple wireless remote control circuit to control a micro motor

All I need is to be able to activate a small 4mm by 6mm micro motor with a remote wireless switch. Just on and off. I have searched everywhere for help and I can't figure anything out, I am ...
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41 views

What factors affect the choice of a particular variant of the Clarke transformation?

I have a question about the different variants of Clarke transformation. In one of the responses on this site, I read the following: 3->2 symmetric component transforms (a.k.a. "Clarke") are not ...