Controller Definition and 189 Threads

I wonder if I can get some opinions on this circuit before I go looking for the parts. It seems simple enough even I can build it. Alternatively, does anyone have any dope on making a saturale core reactor (magnetic amplifier) to control an AC welder? All I can find on the web is theory. As...

i know what it's supposed to do but what are it's electric components for an AC motor?

I was going through an article on CAN bus in Wikipedia & was stuck at the point where bit stuffing is explained. CAN is an asynchronous bus. They implement NRZ (Non-Return-To-Zero) encoding. To enable the receiver to correctly read the messages, continuous resynchronization is required...

Hello, I am trying to use a DC voltage sensing relay to control a generator in order to charge my batteries when they get low on charge. I have two 12 volt batteries in parallel connected to an UPS Inverter/Battery Charger. This charger is powered by the generator. I want to connect (in...

hi i am having a bit of a problem understanding the steady state error in proportional controllers.. The output from a P type Controller is proportional (u=kp(error))to the error so why does this error arise?? The output from the controller tries to achieve the S.P. Once the O/p = SP the...

I'm doing my homework, and encountered a problem. The problem is the one as attached. It includes a part of solution that I don't understand. I've known that when designing the PI controller, we start from D(s) = (Kp + Ki/S) The condition of the PI controller is, firstly, unity DC gain. So...

Homework Statement I am given the transfer function Gp (s) = 1/(s+16) and I have to design a controller of the form Gc (s) = K(1 + 1/T*s) (which is a PID controller) To meet the following requirements: Maximum steady state error to a steadily changing desired position = 5% Maximum...

The block diagram (attached) shows the control of an electric heating system. The heater is driven from a voltage-controlled power supply, the voltage V1 being derived from a potientiometer. The output temperature, θO, is subject to disturbances, θD, because of changes in the ambient...

And maybe the answer is to simply buy garage door opener controllers and re-purpose them, but I bet someone here has a more elegant solution. Many of the things I want to make for my house tend to require behavior like an automatic garage door; meaning that the push of a button would open or...

Hi, all; I see that there some pretty knowlegeable people here so maybe someone can advise me: I'm trying to run a dc permanent magnet 100v treadmill motor from house current via a bridge rectifier, not through the usual pwm controller. I'm using the choke that came with the treadmill and...

I've been currently playing around with a toy quad-copter that you can write your own programs for and was attempting to make it go to a set of coordinates that are specified. I was wondering if someone could help me design a controller for the yaw component. I am currently calculating the...

Hi, I'm looking into the control of a PMSM (permanent magnetics synchronous motor) motors using H-briges and PWM (puls width modulation). I'v seen motor controllers that use a PID controller for speed regulation. The output of the PID controls the PMW. This makes sense to me because the PMW...

So I've decided to finally stop watching youtube videos and start experimenting with electromagnetics. I'm just going to start off with some different gauges of magnet wire, some magnets and iron rods, and a multimeter, but my problem is my power source. Is there anything that I can just plug...

I'm trying to pull in an ATMEGA168A-PU Atmel 8 Bit 16K AVR Microcontroller into Eagle and have looked through the libraries provided through their website, does anyone know where i can find it or and equivalent controller?

good day all.i've just written a program in fortran77 for the model of a binary distillation column.i included a PI controller in my program.To obtain the integral term of the PI,I used the explicit euler to numerically integrate the error.i would love to compare my results using another method...

Why is this a spring-damper system considered to behave like a PD controller? The spring I am assuming would be the current error and so I guess the damper would provide information about the future error. How does the damper provide information about what the error will be in the future?

So I am trying to make a motor controller circuit. The idea is, that when the polarity is in one direction, the motor turns one way (which you can vary the speed) and when the polarity is switched, it turns the other way (which again, you can vary the speed). Also LED lights illuminate...

got my hands on an old phone, and recovered the LCD panels (it's a flip phone, with an external panel) anyone know where I can find a controller for a WD-X0908W or 7271993D01 lcd panel? or any other means of interfacing with a computer or arduino? thanks!

designing slider controller for controlling tilt angle of propellors I've been working on designing a tilt rotor. The propellers need to tilt from straight up to horizontally forward - 90 deg to 0 deg. I need to design the tilting mechanism, but more specifically at the moment, what I'm...

I have a uniquie project I am working on and was wondering if someone could tell me how it would be possible to control a mechanism using my current controller. Right now I have a differential temperature controller that uses two sensor probes and turns on and off a 120V relay switch if the...

I use a popcorn popper to roast coffee beans. I'd like to be able to vary the heat of the heating element (as inexpensively as possible). My thought is to connect into the internal wiring of the popper to the heating element and run a wire out to connect to some type of external controller...

Evening gents, I am somewhat of a novice with electronics, but nonetheless am working on a temp. controlled computer fan but I've run into some trouble and need some help! My basic layout is a thermistor implemented as a voltage divider (with a resistor of course) which feeds into an amp...

Question - Regarding a cnc cmm controller, What is tunneling? How is this measured? What impact does the cmm structure have on this characteristic?

I have two satellites flying in formation geverned by the equations of motion including J2 and drag. Now, one of the satellites has more drag than the other so they become appart. I designed a controller (proportional integral) which meassures the along track position between them and gives...

So, I've been thinking about this for years as I've began studying Mechanical Engineering, but I never felt like I had the time or expertise to undertake the project: to make my own temperature controller at the heart of a fully functional and high quality espresso machine. It wasn't until this...

Hi, I'm taking a control engineering course and I've got a little doubt about PD controllers. Here is my root locus plot: http://imageshack.us/photo/my-images/535/controlw.png/ I have the system defined by the poles in the root locus with some design specifications that are satisfied when the...

Greetings. I am asking for help connecting a Wago 24vdc power supply to a Galil motion controller. I have a very limited electrcial background. The power supply (ps) has 120vac L-N-G inputs (I get that part) and outputs 24vdc/2.5A as two plus (+) outputs and two minus (-) outputs...

All the books I have read say that when a proportional derivative controller is used the natural frequency remains the same. However, this is true only when the proportional part of the PD is unity. Otherwise the natural frequency is multiplied by Kp i.e. if the original...

I have a motor that is driven rail to rail. So, in forward its +12 volt, and backwards its -12V, and it can also be at 0V. Can I call it a bang-bang controller, or is there some other name for it since it has 3 different control values? It is also very stable and accurate steady state...

I've run into some issues running the probably obsolete Lakeshore DRC-91CA temperature controller in the lab and I'm hoping someone here has some Ideas on what's causing these problems. The temperature controller is currently hooked up to an old computer through an IEEE/GPIB cable and is...

Hi! I've been looking to simulate a PI controller in SIMULINK without much success. You will be able to find a description of the above in the images located here: https://picasaweb.google.com/102197309611185157885/PIControlWithMatlabAndSIMULINK?authkey=Gv1sRgCOCnzvbm5PuNJA&feat=directlink. I...

Hello all, I am a Mechanical Engineering junior and I just finished with my first control systems class. I have found the class to be really interesting but it was all theory. I forgot to ask the professor before I left for summer, how do you actually build controllers? I understand how to...

hi, I'm designing a controller for quadroto with MATLAB and I'm using SIMULINK to do this. In the embedded function I have to define the initial values so that the velocities take initial values but then in the embedded function the derivative of the velocities is calculated and then there is...

I am just wondering, what is the difference between a DC/DC converter or DC/DC Controller? It seems to be a same voltage converter IC?

Hi, I'm new into this forum. I'm planning to do a syringe pump controller to be used with a Labview software. As far as i know, precision flow rate movements higly depends on having the right stepper motor being used. Has anyone done anything similar on this? I'm looking for the right...

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hello, this is regarding my project which is detergent control system that need microcontroller 18f4580..but there some error when i run using MPLAB, I'm not sure what was that. can anybody help me,, #include<p18f4580.inc> ORG 0000H GOTO MAIN ORG 0008H BTFSS PIR1,ADIF...

Greetings everyone, I'm trying to figure out how I can take an old Rock Band kick pedal and make it activate a button in a controller. I've uploaded pictures to help explain. Simply put, I want to make the kick pedal which already has some sort of pressure switch in it to activate the button...

Hi, I'm trying to design a control system for an active steering system. I have the feedback loops setup fine, and the PID controller. I'm not sure how to get my reference model to work, but I'm thinking I might need a feed forward controller, however I can't seem to find any good material...

Hi all, If we misrepresent the Model of the system say we linearized the System Model or any parameter variations like friction, Temp etc. Will normal feedback takes care of the offset of the Model? I was confused with Robust Controller. What is it? and How effective is it than normal...

Homework Statement Consider the continuous time state space model governed by: A = [-1 0;1 0] B = [1; 0] C = [1 -1] D = 0 a) suppose we are using the following state feedback and observer gains K = [k1 k2] L = [l1;l2] find the loop gain symbolically using MATLAB (aka find...

Hello Everyone, I am trying to put together a PI controller for a boost converter. Vin = 150V Vout = 300V (Require this much boost) Switching Frequency = 25KHz I am attaching a schematic in PSPICE. Please , someone, tell me if the connections are right. Also V-PULSE / SAWTOOTH = (0...

hye.. i'm working on my FYP project on designing and building a rocket controller which will react on altitude change thus shifting the angle of its fin to make sure the rocket fly to the right altitude. can anyone help me with the topic?

I am working on a temperature controller, it controls a separate heating and cooling circuit...I want to hook it up so a fan also comes on any time the heating or cooling is activated. The 4 circles are going to be outlets that I can plug into...the whole thing will be mounted into a radio...

My teacher and I want to make an incubator that will provide an environment with a optimal temperature of 37C. This is our final year project since now that AP exams are over... Our problem is trying to get a controller that will regulate the temperature within the incubation tank. I...

Hello I'm a student working on a project in temperature control. I have to investigate some of the properties of a standard PID controller. Sadly my project supervisor is not very helpful and I was hoping somebody here could offer me a litte guidance. I would like to simulate my controller in...

Hello I have attached the sheet that describes the problem. This is supposed to be simulated in MATLAB first with no disturbance and then with disturbance. My problem is that I am not sure how to program a lot of this stuff in MATLAB so that is one thing i need help with and then just putting...

I'm currently doing a project on neural network controller for an internal combustion engine to reduce emissions level. Can anyone assist me in training such models (neural networks)

Yesterday, I tested a peltier thermoelectric cooler ghett-rigged onto my telescope CCD camera (pic attached) and was pleased with the results, so I want to make a more permanent/user friendly solution. Besides some obvious mechanical and thermodynamic needs, I also need a controller. I did...

This is a general question. When using the optimal method to design a controller, specifically a linear quadratic regulator, you usually have a state-space representation of a system, and a cost function to minimize. The cost function usually takes the (quadratic) form: I don't...