Control Definition and 965 Threads

Hello I asked a question about infrared and UV a while back for which I got some very informative responses: https://www.physicsforums.com/showthread.php?t=676881 This is in a sense a very short follow up question: Is the reason that we don't feel 'heat' from an infrared remote...

What represent reactivity excess and how is it determined How we can evaluate control rods worth by measurements and by using computer code. It is absolout necessary to take into consideration control rods interfering efect? All problems regarding research reactor. Also if exist some books...

how can we control stepper motor in emu8086? we have to take input AT RUNTIME that if we enter 0 it will stop the stepper motor, 1 for slow speed, 2 for medium and 3 for fast speed.

Dear all, This is a newbie asking for some information. Actually, we have 1x30HP, 2x10HP motors working at our workplace. When we start the motors there is a lot of torque generated due to which our grid supply charges us penalty every month. We need information about the device(s) that...

Hello, I'm working on obtaining an equation that will help me model the behavior of velocity as a response to the current flowing to a coil in a MagLev. I have tried to relate momentum and electromagnetic momentum: m*v=F*Δt F=q(E+ v X B) V= (q(E+ v X B) Δt)/m Am I going the right...

I'm wondering if anybody can list some schools that offer a Masters in Controls Engineering. Preferably without a thesis and 100% online. Also, how would a Masters of Electrical Engineering (MSEE, M.eng) compare to a more specific degree (such as controls, mechatronics, etc.)?

Homework Statement Since this is a third order system and there will be a zero in its transfer function i am confused that how the natural frequency and K will be linked ? Please do help i really get confused in these type of problems. Homework Equations The Attempt at a Solution...

[SIZE="3"]Evo don't you dare close this thread I want at least one answer as to why it can or can't work :P So sinse we can strap electrodes to our heads and with nothing but thought, we can make something happen, whether it's moving a rats tail, moving a ball bearing or making someone elses...

Homework Statement The angular velocity of a process control motor is (21−(1/2t^2)) rad/s, where t is in seconds. 1.) At what time does the motor reverse direction? 2.) Through what angle does the motor turn between t =0 s and the instant at which it reverses direction? Homework Equations...

I am in the middle of designing a low drift and low ripple power supply for myself. To control the output voltage, which ranges from 0 to 20V, I am using an op amp whose output is fed into a Darlington pair of power bjts. The output of the Darlington pair is both fed back to the op amp's...

Hello, My professor did a lecture about mass conservation in a system. He basically explained the lining that separates the system from the surroundings is the control surface, and all that is contained within the system is the control volume. I think it was explained rather loosely, and...

Hello, I'm a mechanical engineering major/electrical engineering minor university student. A huge part of mechanical and electrical engineering is control theory, which I enjoy immensly. I have yet to take any ME control electives but took a systems/stability course as my last EE elective...

I'm having problem with task (a) in this problem The question My attempt The solution Why don't I get the same after I take the partial fraction using my calculator? And where does this R(s)=1/s^2 come from

Dear all, I am building an arm with 2 joints(elbow, shoulder) and want to optimally control it to a particular position(wirst). The examples I saw so far(e.g. acrobot) have a target control signal u(t_f) which becomes zero when reaching the target x_{target} in the final time step t_f. In my...

Hi all. I'm trying to come up with a way to determine if the defectivity of a particular widget is 'different' to the usual defectivity of a widget. The difficulty comes from the fact that widgets are made in batches of 25. We'd like to investigate any widgets which have a higher (or lower)...

Hi all, I am wondering if time has any control over light or is it vice versa? For instance, is light speed controlled by time? I have read that it is impossible for anything to travel faster than light and time slows down the closer you get to light speed. Is this because of time being in...

In dc motors, speed can be increased by weakening or decreasing the field flux. The mathematical explanation is --- Speed is inversely proportional to flux. But why is it so? Should not it be that when flux decreases torque decreases which is driving the motor. Now decrease in Torque should...

Hi all, I am a student and I am trying to understand how to achieve carrier phase stabilization for frequency comb using quantum interference. I found out that the interference leads to generation of current but I can't seem to find the derivation of the equations for the current generation...

Could someone refer a book or a tutorial that explains the concept of "control structure" - In section 3 of the following paper http://link.springer.com/article/10.1007/BF01797154# in simpler terms? Thanks in advance Evrin

I came up with this question while studying for an upcoming exam. I had a design problem, my solution gave me a gain of about 5500 with a PI compensator. Does having that high of a gain screw with my system? It gives me the desired results in MATLAB, but are there any drawbacks to doing that?

Hello folks, I am having hard time to decide which class to take in my senior year. I have two choices: Embedded Systems with primary focus on FPGA and VHDL and another class is Control Systems design. I like both of them, but the problem is that they are offered almost at the same time, so I...

How exactly would you describe the principle of a valve for flow control? In a globe valve for example the fluid flows through valve seat and generally leaves the valve with the outlet diameter being the same as the inlet diameter. My original assumptions were that Bernoulli's principle...

Heyo, Finally taking my first senior level course in Mechanical Engineering - Dynamic Systems and Controls. I find it incredibly interesting and was hoping someone could suggest an easy to medium difficulty project I could do on my own. This is for my own edification. The book that my class...

I was reading through an article on, "Shunt Reactors for Voltage Control" and I am slightly confused. (See link below for article) http://www.onegrid.com.au/wp-content/uploads/2012/03/BR-EN-TH16-02_2006-Shunt_reactors_for_voltage_control.pdf The article reads, "When the network load and...

I just watched a video by Koenigsegg engineers and came across this question. Why is camshaft the primary control of the engine valves? Using electronic controlled actuators would certainly benefit the engine in aspect of performance, but might increase the cost of production as well. People...

So I want to build an electric longboard. I have access to pretty much any machining equipment but don't have much knowledge on the electrical side of things. I know I will need a LiPo battery (I am aware of the dangers of them), and an electronic speed controller (ESC) hooked up to the motor. I...

Homework Statement 1) A cylinder with an initial volume of 1.5 m3 initially contains water 1 MPa and 200 ° C (condition 1). Container is cooled at constant temperature until the volume is 42% of the initial volume (state 2). The constant temperature process is followed by a constant volume...

Hey everyone, I'm trying to figure out what formula I would use to find the authority a flight control surface (not a wing) would have when deflected. I've been searching and searching for information, but if anyone has done some similar calculations, the help would be greatly appreciated!

If one has a simple variable coefficient process like y'(t) = r(t)*y(t), is there a way to control it to a set point by feedback hitting the variable coefficients in r(t)? I am interested in feedback control of population processes. y'(t) = r*y(t) is simple proportional growth with a...

Hi, i’m looking for some mathematical tools for analysis or classification of solutions of optimal control problems/variational. Equations of motions and optimized function depend on some parameters eg. dX1/dt = f(X1,X2, u1, p1) dX2/dt = f(X1,X2, u2, p2) where X1,X2 are state variables, u1,u2...

Problems of control and automation, help please! 2. What are the 4 classes of programming languages of PLC? 3. How to illustrate the meaning of control system in control and automation system? 4. How to illustrate the major role of CPU in a PLC and what is the major role of CPU? 5...

I'm trying to get the transfer function of this rigid control system that uses rate feedback to stabilize it. Using k=1 and kv=0 Attempt at a solution. When kv=0, the rate feedback is removed. In the block diagram, I moved the pickoff point and used the cascade rule to get 1/s^2 and...

Senate rejects background check amendment 54-46 http://www.cnn.com/2013/04/17/politics/senate-guns-vote/index.html?hpt=hp_c2 I'm having difficulty finding the actual bill. Does anyone have a link? I'm sick of reading summaries and opinions without reading the actual bill. I tried searching...

Hi. I'm currently trying to build a circuit in order to control a small pump motor from an ardupilot mega 2.5 microcontroller. The pump is rated at 12 v and 3.6 w but I only need to give it about 9 v for operation. I'm using a basic supply of 9 v battery or 2 in series to give the power...

Homework Statement Welding robot is defined by the block diagram attached/ excuse the paint work. (hope that worked) find: a)maximum value of K required to achieve stability. b)roots of the characteristic equation, at half the maximum K value. c)estimated percentage overshoot, if the...

1. How I can calculate the flow mechanics forces that operated on the wafer? How I can calculate the stress, forces and torques that are permit to put on a wafer that his thickness is 100 microns and his width is 10 meter and his length is 10 meter. The wafer is from the family of...

I am trying to make a sound activated linear actuator to open blinds when my alarm goes off. There are a couple concerns I have; Will the switch be triggered by a loud alarm clock? and would there be a way to have another switch to close the blinds once they have been opened, something like a...

Hello all, I am a student of Nuclear Engineering and I am very new to this beautiful field of engineering. I have been very curious related to a discussion in my class about "Average temp control" of a NPP... This is in relation to the effects of Tube plugging in the Steam Generators which...

hey all, i'm stuck with the following designing problem (Control course) : Homework Statement given the location of the poles , find rise time , peak time, percentage maximum overshot and settling time for each pole. pole are: 1 . pole at θ = 70 , ωn = 1 2. pole at θ = 70 , ωn = 3...

Why should the input follow the exact output in control systems (Transfer function). What if my system is an amplifier ? shouldn't that means that the output is the input * gain ? I can't understand the differences between dealing with a real system ( such as an amplifier) of dealing with a...

Are F1 control arms, upper/lower designed to supply an amount of downforce or just the ability to cut through the air with as little interferance as possible? I had seen a photo recent and it got me woundering. Maybe someone can explain Cheers

I am doing project on open loop v/f control of three phase induction motor. How to decide the frequency and amplitude of triangular wave(carrier wave) for sinusoidal PWM ?

If I construct a curve such start from point A0, A3, to point A6 where A1-A2 and A4-A5 are control points, is called a Bezier curve. What is it called by and what its equation if I construct and fit a curve start from point A0 > A1 > A2 > A3 > A4 > A5 > A6 such as below image?

Homework Statement In this exercise we want you to apply your knowledge of Relay Logic Instructions to design a program which will control the ProSim-II Door. The Door System includes a Reversible Motor, a pair of Limit Switches and a Control Panel, all connected to your PLC. The program...

When designing a State Observer for a control system the observer poles (eig(A-LC)) should typically be about 10 times faster than the controller poles (eig(A-BK)). But when designing a digital control system what does it mean for the poles to be faster? For the analog case it simply means...

I have a lot of questions, if you know something in one of them or more I will glad if you can write a replay I search after researches or others things that are correlated between optimal control and autonomous vehicles it can be things like how to calculate the shortest way, the rapid way...

what i mean is, if i want to make a certain rectifier circuit to some sort of load, how would i know which diodes and transistors/IGBT's/MOSFET's to use? for example, i have an AC source with 50 hertz and a load that requires 60 hertz, what would i use? can you show me calculations?

Hello, I am confused why when we turn on a faucet on small, the water doesn't accelerate out of the tap like you would expect from Bernoulli's equation where a reduced area means a high velocity. It seem's like the faucet only regulates flow rate but not the pressure. However, if you connect a...

I am trying to implement a digital state space control and am confused about something. The system has the standard state space form: x(k+1) = Ax(k) + Bu(k) y(k) = Cx(k) The vector y(k) comes from the sensors measurements and u(k) is what is sent to the actuator, right?

I have used many mobile phones and controlled volume on them but I have never been able to figure out how the volume increases or decreases, i.e, what actually happens in a circuit board or other parts present in the phones when we are controlling the volume which ultimately leads to speakers...