Control Definition and 1000 Threads

If we consider a system of fixed mass as well as a control volume which is free to move and deform, then Reynolds transport theorem says that for any extensive property ##B_{S}## of that system (e.g. momentum, angular momentum, energy, etc.) then$$\frac{dB_{S}}{dt} = \frac{d}{dt} \int_{CV} \beta...

The correct solution is different than my answer, I am not sure where I am going wrong?

Elemental fixed streamtube control volume from Professor White’s textbook “Fuid Mechanics”: I was unable to develop the intermediate steps for the following approximations: (continuity equation according to the book ) Where and (Momentum equation according to the book) In...

can i solve this problem i didnt go university due to Covid-19

I don't know how to calclute error in derivative for daming ratio of 0.5

I've been deeply disturbed by recent brain-related experiments that involve driving around insects, rats, and probably other animals like remote-controlled toys. No doubt this will lead somehow to some benefit for humanity. To cut straight to the point, do you feel (because this is a moral...

Hello, I am after some help to try and understand SVM implementation is a micro that controls a motor. As I understand it one of the advantages of using space vector modulation over sinusoidal PWM modulation in motor control is that it can control the phase voltages such that the line-to-line...

[Moderator: moved from a homework forum. This does not sound like homework.]Homework Statement:: Why is it the case that when the low-frequency response is to the right of the M = 1 line that the 'speed of response is slow'? Relevant Equations:: M-cirlces Hi, Hope you are doing well and...

Summary:: We have a rotating arm, offset from the centre of rotation by a certain length, which is controlled by varying the length of a control rod. Need the angle of the rotating arm in terms of length of the rod. The blue line is a fixed column structure. CE and BD form the rotational...

Hello, I am looking for a controller whether programmable or otherwise that could function as a drive and control circuit which would monitor a transformer output connected to a load and then drive an amplifier with a signal that is proportional to the needed one in order to control the output...

Hi I'd like to know if my current approach to the problem has any issues. My attempt: Balancing the equation: Qin + Win +mΘout = Qout + Wout + mΘout Qin+m(hin + v2in/2 + gzin) = m(hout + v2out/2 + gzout) Wflow + ΔU + m(hin) = m(hout) I factored out the mass: wflow + Δu + hin = hout And I used...

Why is energy balance for a control volume dE/dt = dQ/dt-dW/dt-dm/dt(ΔH+ΔKE+ΔPE) 0 = dQ/dt-dW/dt-dm/dt(ΔH+ΔKE+ΔPE) whereas for other systems it is ΔE =Q-W-(ΔU+ΔKE+ΔPE) 0 = Q-W-(ΔU+ΔKE+ΔPE) with enthalpy, h = u +pv, replaced by only the internal energy? How is the pv term accounted for...

Hello So i was curious to know, what kind of tests you guys would run on a setup, for an AC drive and motor, to see if the controlling works properly? kind regards

Hello guys. Sorry if this sounds like a stupid question. I have tried searching for a similar application but couldn't find something that fit my requirements. My design of the machine requires accurate control in dosing of a powdered chemical into my liquid tank. The powder will be stored...

few questions 1) is it true that for a 50 or 60hz induction motor maximum torque is achieved from 0hz up to design hz and if an VFD is used and frequency is increased above 50 or 60hz like 100hz the rpm will increase but the available torque will decrease? Is the reason behind this the fact...

I'm studying fluid and propulsion mechanics by myself. I stumbled upon this website from MIT: http://web.mit.edu/16.unified/www/SPRING/propulsion/UnifiedPropulsion2/UnifiedPropulsion2.htm#fallingblock It states that "Newton’s second law for a control volume of fixed mass" is $$\sum...

I have a simple question...the control qubit is A and the the target is B. The cnot is applied on |1A> <0A|⊗|0B0C>. ... How does it work. Thanks in advance.

This took roughly two months to complete from start to finish. Link to imgur album so that the full-size photos can be viewed. Rendered in 4K.

Hello there, please help if you are able.. So we have a tank with input volumetric flow and output volumetric flow The system is controlled by the height of water in the tank h(t) = hdes + (√h(t))*(-A2*(√2g) / A1) - h'(t) I am trying to find a transfer function for this system but I do not...

How do you calculate the flow rate and differential pressure (the operating point on the pump curve) for a centrifugal pump if all of the flow is through a single control valve with known ##C_V##, discharging to atmosphere? Clearly the flow rate and differential pressure of the pump will be...

Hello everyone, can somebody please explain me what is the function of this relay. I can't understand it from their datasheet. Thanks. https://www.ifm.com/ua/en/product/AC2258?tab=details

I get so many different answers to this question so maybe here someone can pin this down. When I get up in the morning and I turn on my TV, I have over 3,000 channels so is there a universe with a version of me going to each channel? If not, how do I go to one channel over the other? Can my...

Context: Small living room, Moderate amount of humidity if the room doesn't get ventilation but is cold outside. Question: If I use some object that can stay in a cold temperature enough to cause condensation (like having a cold beer sitting for a while) and remove the condensed liquid every...

Hi. I am new here. I have a question on how to speed control a DC motor running a pump. The pump is a seawater cooling pump cooling a large V8 motor. Therefore I need to control the RPM, based on the temp of the V8 Motor. Any ideas?

My questions are now... Do the steps of converting this space to transfer function include any laplace ? or just we do get [SI-A]-1 and then transfer function is = C* [SI-A]-1 * B As [1 0] * [s-1/det -0.5/det ; 0.5/det s-0.5/det] * [0; 1] = -0.5/s^2+s+0.5 I mean do we need any laplace after that...

Just need a bit of guidance to make sure that I am heading the right way. Question is: Fig 3 shows the block diagram of 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...

Summary: The new HBO miniseries inspired me to use blender 3D to re-create the Chernobyl control room. The HBO miniseries about Chernobyl inspired me use a 3D modeling program called Blender to re-create the RBMK-1000 reactor control room of the Chernobyl nuclear power plant. It's about 95%...

From my understanding, the root locus is only concerned with open loop gain. I figured this means you would ignore the negative feedback loop and calculate the root locus from just the plant's function Workings: zeros: -1 poles: 0, -2, -2, relative degree = 2 => 90-degree asymptotes meeting...

<< Mentor Note -- Thread moved from the technical forums, so no Homework Template is shown >> I was looking into process control and capability of general manufacturing company. e.g one that constructs bolts There process was was within tolerance and in control producing screws within...

See my previous post! https://www.physicsforums.com/threads/do-gravitons-have-frequency-like-photons.957146/ Let's say we had some aliens that had the ability to emit/interact with gravitons with frequency roughly in the range corresponding to human hearing (20Hz-20KHz), and that they had an...

Hey, so for a capstone project we are working with 2 24V wheel chair motors. and the sponsor wants us to make it operate like a skid steer (two separate handles, one for each motor, controlling the forward and reverse speeds). Me and my group being a mechanical engineers, we are not so...

Hello all, I am currently building a test bench that can input a high amount of flow, pressure and temperature into an Air Cycle machine. The inlet to the machine requirements are: Flow = 71 lbs/min P = 48 PSIa T = 235 degree F Diameter = 3 inches In order to produce these conditions, I have...

Can an expanding balloon be considered a control volume?

I am in my 4th year in a Bachelor of Science Electrical Engineering Technology (BSEET) program that leans toward electrical transmission and distribution. I have had two courses in calculus, so have briefly covered differential equations. Unfortunately, my course curriculum does not cover...

I am discussing with my friends to see which way is the best way to get the most stable branch outputs when one branch condition changed suddenly. There are three liquid flow branches, A, B and C, connected together with one pressure source, like this configuration: The Water Pump, #1...

Is there any solutions for a micro controller to control massive amount of relays, such as 100 of them? Do I really need 100 I/O ports for this circuit? I can make one master MCU with couple slaves to get many I/O ports. But I think there must be some better way to do it.

ıs there anyone to solve 8th 9th and 10th problems? It is about transfer function and control systems http://avesis.yildiz.edu.tr/DokumanYetki.aspx?SSNO=33&USER=2813Password= 1234

Hello and good day. I am currently involved in research that seeks to utilized a Walker Scientific power supply and magnetic. The system is old but functional. We seek to utilize the magnet in order to conduct some low temperature experiments. We need information on this power supply, of which...

My two years old son loves lights and computers. I was thinking to buy an Arduino or a Raspberry pi like single board to control a LED matrix panel. What I want is to be able to control individual LEDs by pressing on keys on a keyboard. Example: by pressing "a", a LED lights up, "b" another LED...

Homework Statement Homework Equations - The Attempt at a Solution I tried to design the circuit to control the first 7-segment , but I didn't get the correct answer. Could someone check where is my mistake ?

Homework Statement I'm having trouble worki out the transfer function of the block. Whats confusing me is the input of O2 input of 50. If that wasn't there I know the transfer function would be Oo/Oi=G/1+GH. Homework EquationsThe Attempt at a Solution

In a web tension control system, where feed forward is to be used. A tension set point is desired let's say 20lbs, and a load cell system provides feed back. There will be dead weight on the load cell as the material with no pull sits on top of the load cell system. [Obviously I will need to...

Homework Statement Give an example of a non-linear discrete-time system of the form x1(k + 1) = f1(x1(k), x2(k)) x2(k + 1) = f2(x1(k), x2(k)) With precisely four singular points, two of which are unstable, and two other singular points which are asymptotically stable. Homework Equations J =...

Homework Statement Determine the parameters of the PI controller such that two of the closed-loop poles of the transfer function Gclr(s) correspond to the poles of a second order LTI system with the following specifications: i) overshoot S% = 25%; and ii) settling time ts(5%) = 120 s. Homework...

When I use the air conditioner in my Toyota Camry, and I move the temperature control towards warmer: Does it make the AC cycle on/off thus saving fuel? Does it mix warm air with the cold, thus saving no fuel? I couldn't find an answer to this on Toyota forums.

Hello all It's been a while ,as I read the almost daily news on climate change , some question come up to my mind , dose the ionosphere has any effect on climate change , as we all know now the Earth magnetic field is weakening ,and the temperature is rising ,dose this two variables related to...

URL: https://www.jssor.com/demos/image-slider.slider Is it possible to have a Image slider control which infinitely shows images after every 4 seconds delay but every image itself is a animated and not a static image? I.e Image Slider control showing animated images .gif,.jpg etc Thanks &...

https://en.m.wikipedia.org/wiki/Slider_(computing) Is it possible to design a Slider control which is displayed as a Circular shape, the control can be adjusted by moving the pointer clockwise to show the progress value similar to a Circular Wall Clock ? Thanks & Regards, Prashant S Akerkar

Homework Statement Problem: We want a closed loop control loop for the given process (see bode plot), the control loop requirements are: Steady state error needs to be zero. The gain margin needs to be infinite. The phase margin needs to be 40 degrees. Questions: Which controller will be...