Control Definition and 1000 Threads

In an Access database, I have fields (datatype = dbl) named "length", "height", and "sqrfeet". In my vb code I'm doing calculations to figure the square footage by multiplying the length * height divided by 144. The formula works just fine, but when adding the record to the database the length...

I am interested in designing a motor speed control. I am thinking I would like to use IGBTs as the power transistors, 600V 60A max ratings. I do not have a motor yet. Will it be possible to use a motor rated at a much lower voltage? It will probably be a DC motor in some type of small electric...

I want to to make a remote control for my phone. I want to control certain functions without touching my phone. How difficult will it be to accomplish this. I don't have a lot of bluetooth knowledge except that it works with high frequency waves but to really get to the root of it, is it an...

Homework Statement A 0.090 kg remote control 24.2 cm long rests on a table, as shown in the figure below, with a length L overhanging its edge. To operate the power button on this remote requires a force of 0.460 N. How far can the remote control extend beyond the edge of the table and still...

Is it possible to remote control electric appliances directly using a bluetooth enabled cell phone (without PC and laptops as intermediate)?

After I discovered that someone had made a handheld tesla coil (http://www.rmcybernetics.com/projects/DIY_Devices/plasma-gun.htm), I started thinking about the possibilities. For example, would it be possible to use a magnetic field(s) to control and focus the energy that is being randomly...

How do you control the illuminance of atoms to create a safe output of energy to form a light source? Can it be done using a magnetic field to move the atoms to form a sphere shape of light? Alan Arqueza

Hi, i want to know if there is a possibility to add a remote volume control to this amplifier above. I just have to control the volume of both channels. The buttons themselves don't have to move, just the power should go up and down by the remote. Please let me know if anyone has an idea...

I'm trying to find some information on different methods of controlling a permanent magnet synchronous generator, more specifically controlling the torque directly. I've done many searches but the only source of information I can find is from papers in the IEEE database which I don't have...

Please could anyone help me on the topic "Controlling the vibration and shocks received by elctronic-mechanical components"?

Hi to all! In the simple electrolysis of water, may you point me in the right direction with regards to: 1) Rate of evolution 2) Bubble size control As in what parameters will affect the above (eg voltage? diameter of exposed wire? length of exposed wire? salt content?) Better...

anyone did or intends to choose industrial automation control systems ( IACS) for their training and/or occupation? do you have any info about IACS job wise, money wise, difficulties (nerve wrecking) job, job stability, stress and everything else related to industrial automation control...

hiiiiii i want to know the very latest technique for corrosion control

http://www.kendall-bioresearch.co.uk/thysop.htm MIH had ants i have these things, they smothered one wall inside the house, why just one wall? they are a right pain as i have to keep all the windows shut when it is over 80f.

hey Everybody!... I`m stck with the Control of a DC Motor...I need To Control a DC motor in this way, it Must Start real slowly, and then progressively but slowly should continue to reach its maximun velocity, it could take up to 1 min to reach it; then remain for a set time stable at its final...

Hello everybody, I've come cross the following first order nonlinear equation when trying to solve for the speed of an electrical motor at any given time t during motor start. y'=-(ay^2)+bx+c ; y(0)=0 ; a, b and c are constants; y=motor speed; x= time The...

We are many years out of school. We are building robotic positioners for television cameras. Our experience in the mechanical design is extensive. We are seeking direction in motor control. The motors which we would like to try are flat pack brushless dc motors with 5 wire on board control. The...

I need to calculate the spring force required to make a back pressure regulator for fluid control the back pressure must exceed 3bar to open the ball valve the flow rate is 82mls/per min. the bore dia of the inlet is 2 mm dia. any help greatly appreciated

I'm designing a lead-lag controller to control a robotics-arm (part of an excercise). I have found diagrams showing the correlation between overshoot and phasemargin for a second order system but in my excercise I have a third-order system. Can I apply the the relations for a 2nd-order system...

Doing a Cascade Control lab and I'm stuck on a question. Its asking me how to implement critically damped into a control system. I can't find it any where in my books or the net. thanks.

hi everyone, I have recently started studying abvout control engineering, but am not getting a grasp on the basic idea behind controls. All the textbooks say that the output should track the input ideally , but why is it so? i.e if i give a step input to a system, the response should ideally...

Hello, Let me clarify my questions. Short version: When applying to graduate school, does the admission committee often look at which electives you have taken in your major? Do they dislike applicants who take electives that don't seem focus on one specific specialty in that major? Longer...

htp://s290,photobucket,com/albums/ll279/transgalactic/?action=view&current=IMG_8838,jpg the main problem comes when in one input i need to divide the number by 2 (subtract a zero from the original input) while in other control input i need to multiply by two (which meens to add a zero to...

I have no idea where to start with this question. Can anyone help? Figure Q1 is a block diagram representation of a ship steering system where \Psi is the actual heading angle, \Psid is the demanded heading and \delta is the input signal to the steering gear controlling rudder movement...

Hi I couldn't find any specific reading material for T and PI network based compensation in control systems. I was hoping someone could point me in the right direction. If you happen to know something about this, please do reply to this thread. Thanks in advance.

Hi there. I'm wondering if anyone can help. I've got a few past papers I'm working on at the moment and there are a few questions I don't even know where to start with. Here's one: a. Write down the transfer function for a time delay and then evaluate its corresponding frequency response...

Hi I was reading BC Kuo's Automatic Control Systems where I came across a solved problem (page 369 of 7th edition) regarding velocity control. I have a problem understanding how the steady state error has been computed. The original problem and its solution as given in the book are quoted...

Hi there, I'm wondering if anyone can help with this general problem. I'm studying for a BEng in Electrical/Electronic Eng degree by distance learning and am on the subject of Control. I understand most of the coursework and can do most of the questions in the notes. However, I've got hold...

My goal is to implement digitally-controlled reverse-phase-control (dimming) of 120V/60Hz AC power, using IGBTs as the switching device and a micro-controller to control them. The reason I am using IGBTs instead of TRIACs is because TRIACs cannot realize reverse-phase-control. IGBTs can, and can...

Hi For a control systems project this semester, my friends and I are working on a closed feedback image focusing system. Using a webcam, an image of a black and white checkerboard is acquired by a computer program. Then, the amount of defocus (blur) in the image is measured and quantified in...

Rent control are often used as a popular market intervention, particularly in periods of inflation and where tenants outnumber owners. What are the short-run and long-run implications of introducing such controls? Any help would be appreicated. Thanks

I have a data acquisition device that outputs 3 volts if the sensor is activated. My relay only activates when a 5 volt source is put across the coil. What is the easiest way to step up the 3 volt control signal.

Hi For our control systems project, we are trying to implement a closed feedback image focusing system. A digital camera captures the image of an object (a checkerboard), sends it to a computer algorithm which determines the amount of defocus in it and sends an actuation signal to a stepper...

how can u ask questions in this forum?

Why can't i send parameters to an IDC(I.D. Control) I'm programming a MFC project in C++ using Visual Studio. I'm trying to send 2 parameters through an IDC, so the values of these variables can past through other methods, but i keep getting an error message:error C2440: 'static_cast' : cannot...

Homework Statement Please refer to the image attached for problem statement and diagram. There's an inductor somewhere, but I have no idea where and I don't know how to accommodate for it. I can also see that there's another energy storage device, the spring on the right. I have no idea...

I am curious to find out why the 2 parts of the brain control the opposite sides of the body. This is the best I’ve found so far: “For some as-yet-unknown reason, nearly all of the signals from the brain to the body and vice-versa cross over on their way to and from the brain. This means that...

Hello, I am currently trying to design a system that will sychronize two propellor motors, and I must design using the following equation: w'*I + (w^2*r^2*p*S*C_d)/(2) = T_t + T_ss w' = Angular acceleration I = moment of inertia w = angular velocity r = radius of blade p = air density...

Here is another informercial product we should discuss. The claim is when you plug this small device into any electrical outlet it repels rodents and insects/bugs. Apparently it sends a patented pulse technology through the electrical system of a house. While doing some google searching some...

Hi guys, i am taking a module on feedback control systems this semester and i was wondering if anyone has any good recommendations of textbooks. Thanks guys. Marcus.

http://news.uk.msn.com/Article.aspx?cp-documentid=7279188 Surly both engines do not share a single control system.

I was recently having problems with a program for my school, so I called one of the school tech guys to get some help about it. We had a long talk, and eventually, he asked me for some other informations about my computer including my IP address (I can't remember the other stuff). He then told...

Right now, my office cat, bun, is sitting on my lap and holding my hand hostage. I need coffee. I need to hit the head. I am poking out this message with one finger and my leg has fallen asleep, but I can't disturb my Bun. This is the true measure of a cat lover - the extent to which one is...

control creation time of light "particles" Ok, I got this program called FileDate, which allows me to change the creation date and time of a file. Then, a question struck me: What if you were able to control the creation time of light "particles", or light photons? Don't ask me why I'm trying...

Ok, so I have an assignment I need help with. Hopefully some of you here will be able to help me with it. The Question is shown in the attatched files question2a + question2a2. I think what I need to do first is represent the system in a block diagram. I have included a rough one of what I...

is there any downsides to using birth control to stop menstruation?

Hi all I am looking for different nonlinear control methods based on lyapunov theory. Indeed I should use a method which give the "region of attraction" explicitly such as CLF and Bakhstepping methods. Can enyone help me and introduce me some otehr methods? Many thanks in advance.

Homework Statement Linear Control Systems - 2006 past paper If I wanted to design a controller with a transfer function of the form \frac{5(s+0.5)(s+2)}{s(s+10)} How would I go about doing so? Homework Equations A constant gain is given as a constant A differentiator...

Homework Statement A recent homework assignment: Balancing a rod on the palm. I need to develop the equations of motion as a function of the tilt angle for the planar case of an inverted pendulum, given an input acceleration to the palm. By accelerating the palm the pendulum (rod) can be...

I'm trying to figure out how to safely use a dimmer or router speed controller as an inexpensive heat level control for a (nichrome coil) resistance heater. I've read that you can use a dimmer switch as a heat control if you don't run it at more than 80 percent of its watt rating...