A PID controller is a (closed) control loop feedback mechanism. It is used in industral control for proportional, integral and derivative feedback.

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VSC-based multi-terminal HVDC Control

I came across multi-terminal HVDC based VSC Simulation in MATLAB/Simulink. The control (using vector control ) for such a system is very tough for me because I have little experience in this field (...
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Sevcon GEN4 SIZE 6, ME1304 coonfiguration/error [closed]

This site was recommened to me by a friend so it's my first time using it. We are working on a group project, we have ME1304 software and we are trying to use it with a 72/80V size 6 Sevcon controller....
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Comparing PID_v1.h in Arduino to PID(z) in Simulink

I am trying to implement model-based controllers in Arduino. I have explored several control systems in Simulink and now I want to see if I can replicate those simulations in Arduino. For instance, ...
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63 views

How to create a control loop using a 100Msps digital signal as input

I would like to know what type of microcontroller should I buy for this control loop task. Scenario: I have a digital signal coming from the following equipment: UPDATE ::::: Ultrasonic ...
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3answers
54 views

PID Control: Controller of the type \$\dfrac{1}{s+k}\$

In PID control an integrator action is represented by \$\dfrac{1}{s}\$ Does anyone know what would be the effect of using \$\dfrac{1}{s+k}\$ instead of \$\dfrac{1}{s}\$, where \$k\$ is a constant? ...
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42 views

How do PID controllers effect time domain and frequency domain response

I have been asked to use sketches to show how varying P, I, and D settings effects an output response in both the time domain and the frequency domain. I've have been taught how to, and done myself, ...
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Simulink doesn't show all PID's for Control System Designer

I have a script in Simulink of a control system with two PID's. When I try to analyze it in "Analysis->Control System Designer" and I click on "Select Blocks" only one of the PID's appear. Does ...
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3answers
116 views

OP amp PI controlled electrical load

I am building an electrical load, capable of "sinking" 0 - 3A on a maximum of 60VDC. I want to control the load with a microcontrollers ADC (0-3V). On the internet you find hundereds of circuit ...
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56 views

PID controller stablizer application

I am wondering if a PID controller is the correct way to implement a stabilizer for a camera or any device. If I were to shake the device up and down and want to cancel out the movements by ...
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1answer
63 views

Is it possible to guess a reasonable Kp and Ki based on motor parameters for speed PI control

Regarding motor speed PI control, there are tons of articles about it. However, I searched many and noticed that most of them just tell you how to tune Kp and Ki following different methods. But they ...
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4answers
31 views

Choosing accelerometer or displacement sensor for system

I am working on an electro-servo motor system which can be seen as a similar in here! It is a shaketable system which converts acceleration input to displacement output. My question involves a bit ...
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2answers
33 views

How to infer equivalent PID controller coefficients from an existing black box ccontroller?

I have a 2 input, 2 output system that I have recorded in response to 1. steps (actually quasi-steps, with 50 ms rise time + some overshoot), and 2. sine waves from 0.5 to 50 Hz, in both open and ...
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1answer
42 views

PI compensator question

I have a RLC circuit to discover the characteristics of controlled system. The block diagram has shown below where If I add a PI compensator to the closed loop system, Q(s)=1/s,and the transfer ...
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3answers
297 views

Yogurt on a PID controller

How do you change the tuning of a PID controller to deal with changing thermal properties? The project: I am making yogurt. It cultures at 110 deg F for about half a day; you put in milk and a little ...
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41 views

conversion of kp,ki values

I have tuned a pi controller with kp, ki values in integer form using matlab simulink tool.To implement the pi on dsPIC33f it a requires fractional pi controller.How to convert conventional pi values (...
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42 views

What Inf. or Negative Gain Margin means?

What Inf. or Negative Gain Margin means? I am trying to calculate the paramaters for a controller (kp,ki,kd). According to ZN method I need for a start the gain margin. My problem is that I get Inf ...
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2answers
134 views

PID and motor control by PWM

I am having a potentiometer which gives an analog voltage in range of 0-5V. I am considering this POT as throttel input for motor. If i change the pot speed increase and decrese on the basis of ...
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1answer
46 views

Experiment to determine the relation between applied voltage and angle of output shaft of a DC Servo motor?

My project need to control the position of a DC Servo motor, but I don't know the plant model of my motor. So, I want to make an experiment to acquire the data between the applied voltage and angle of ...
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1answer
62 views

PWM with 12V DC fan on arduino

I am using an Arduino with PWM to control two 12V DC fans....however the fan works at 12V and Arduino at 5V, what kind of circuit do i need to allow this to function to work? I would imagine that ...
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1answer
90 views

IIR filter concerns in PID control systems

The following diagram represents the system: Here comes some more description: The system input (ref or reference is zero). And actually the goal of the controller is to maintain the output of the ...
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1answer
33 views

Closed Loop 4 Sensor Control System

I have 4 on/off motors running individually (call them M1, M2, M3, M4) and 4 ping sensors (call them X1, X2, X3, X4) with a board placed in front of the motors and sensors. As the motors move forward ...
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42 views

proportional control offset

I understand that with proportional only control you have to have error or the control output goes to zero. The answer to this question Proportional controller was very informative. Mr. Lathrop ...
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1answer
63 views

PID control: What does it mean that an ideal derivative term is not causal?

On Wikipedia, it says: https://en.wikipedia.org/wiki/PID_controller An ideal derivative is not causal, so that implementations of PID controllers include an additional low pass filtering for the ...
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1answer
93 views

Do high resolution PID chips exist? [closed]

Ideally I am looking for a single chip solution to PID control where ADC/DAC resolution is a minimum of 24 bits. Does anything like this exist or do I have to put it together from separates?
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1answer
43 views

basic understanding of PID controller [closed]

Sir my question is how integral component eliminates the steady state error and physical significance of integral and derivative component in a PID controller.
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65 views

A question about using PID to improve transient response for a DC motor

I have used PID a couple of times, but there is one thing I haven't been able to understand from any literature/textbooks. If I run a DC motor from a 12v battery for example, how can PID improve the ...
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1answer
80 views

Opamp precision PID loop without capacitors?

I am wondering if it is possible to create a hybrid PID circuit using opamps with key components whose values are programmable. Programmable resistors - no problem. But capacitors?
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4answers
132 views

How to control a blower using the analog output from a PID controller?

I built a biomass burner which is powered by a blower. For precise control of temperature I am using a PID controller PID500 from a company called selec . I passed the PID analog outuput to a VFD ...
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1answer
66 views

Simulink Modeling Problem

I posted a question recently regarding PID controllers, and it was swiftly answered. I began to work up a Simulink model and I'm running into problems with my (simplistic) model. I want to work out ...
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4answers
516 views

Misconceptions about PID Controllers

I'm currently designing an equivalent of the mass-spring-dashpot system, and during the design phase I realized I don't fully understand how PID controllers physically work. Below is an image, the ...
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1answer
26 views

Question about the “system-block”

We're busy with a project, we are building a 'stabilized duocoper system' with two DC motors, they have to make the 'arm' stable, so when it goes more to the right the left motor has to turn more fast ...
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2answers
49 views

Sensor Tranfer Function [closed]

I've this transfermodel, my controller is a PID-controller and my sensor is this, how can I find the Tranfer Function of the sensor?:
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1answer
114 views

Analog PID controller (transferfunction questions)

I have to build an analog PID controller (with op-amps), I've made a schematic: My questions: Can I build my PID controller this way? My PID tranferfunction (in the s-domain) looks like: $$\...
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1answer
86 views

designing PID controller using Ziegler Nichols algorithm

I'm trying to use Ziegler Nichols algorithm to design PID controller for the following transfer function: G=w^2/(2*xws+w^2), w=1 , x=0.2. so since the step response for this function is a second ...
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1answer
395 views

Setting up a PID controller in Simulink for an Arduino example project

On the internet I found this "Arduino PID Example Lab" as an introduction to PID-contole. I set up the hardware and it is working like it is diskribed in the document. Since it is possible to connect ...
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49 views

How to apply Ziegler–Nichols to a heater-termometer system?

This is not a production project (though I don't mind it having practical value), but an undergraduate thesis. I already have an onoff controller with hysteresis and that works fine. I am hoping to ...
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1answer
50 views

Design a P-Controller given the root locus ?

I used to have the transfer function given but here the root locus instead ... Can one help with the start...
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1answer
71 views

PID to generate different order Systems

I am looking at an old exam question and I am wondering giving a certain G(s) how can I choose the points of the zeros in a PID Controller to have a second order ...
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1answer
106 views

Build a thin line follower?

I'm building a line follower robot with just 3 sensors to follow a black line of 1cm. However the distance between my each of my sensors is also 1cm. Straight path following is not a problem. However ...
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4answers
282 views

How can i extract transfer function an unknown nonlinear system?

I am trying to do PID control for my electroservo motor system by using nichols ziegler tuning method. My system has SSI encoder output for motor feedback mechanism. I will use this knowledge for ...
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1answer
254 views

Implementation of D (differentiation) in PID

I am implementing a PID controller for motor speed control. I am done with implementing the PI control and it works perfectly fine for me. In the specification I have been told to implement a ...
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1answer
53 views

Help with Motor encoder connection with motorcontroller

I am new to building drones and bots. I started out using motors without encoders with my Roboclaw Motor Controller for my pet project. Here is the controller's link. Connection seemed simple and it ...
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2answers
173 views

PID controller implemented digitally

I've been reading articles about digital PID implementation. So, in the discrete domain, we can write the parallel form PID law, as: $$U(z) = E(z)*\left[K_p + \frac{K_iT_s}{1 - z^{-1}} + K_d\frac{1 - ...
3
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1answer
210 views

PI controller for PWM fans

The requirements I want to control PWM fans to maintain some HDDs in a server at about 35°C, the absolute value isn't critical, however I want the temperature to be stable regardless of the ambiant ...
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2answers
185 views

When to use PID for motor control?

I have a project involving a small robot and I need to write the firmware to control the wheels. Its not something I have done before, so I did some research. In my research I saw that some people use ...
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1answer
243 views

FPGA vs. Arduino for a PID Controller [closed]

I'd like to use an FPGA or an Arduino asa PID controller, and was wondering which device would be better to use? It will be used in a lab, and needs to be fast. Can I get all those in an Arduino ...
2
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2answers
274 views

Is a Type 2a PID(ish) controller just an example of an augmenting integrator?

In a previous question I finally cracked the code on deriving for myself the transfer function for a Type 2(a) compensator like this one, built around an op amp. As it turns out, for AC analysis ...
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1answer
42 views

Equivalent block diagrams, how to infer?

Assume I have one block diagram and I want to simplify it to an equivalent block diagram, how do I find such block diagram apriori? For example, Smith Predictor structure The first pic above is ...
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2answers
187 views

Self-Tuning PID Controller to implement in a PLC without having the plant model?

I need to implement a Self-tuning PID controller in a PLC. I know the behavior of the plant (I mean, I know that if the speed is reduced the tension get high and vice versa), but I do not have a ...
2
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5answers
517 views

Understanding a PID controller

I have a couple of questions regarding the PID controllers; maybe it is that I have not understood the concept very well. I will formulate my question with a case: I have a system which consists of ...