Control Definition and 1000 Threads

Homework Statement A magnet is used to control negative ions and only allow those with a specific mass to pass through a narrow gap opening . The magnet will bend the ion beam in a quarter circle of radius 50 cm . In an experiment, a negative ion accelerated by a voltage of 3.0 kV. Which...

Hi All, I'm working on an automated chiller control system for final year project. It is a logic control that automatically set the chill water supply temperature based on current demand load and the chillers performance curve to achieve the best efficiency COP for the system. For a variable...

Figure P6.95 provides steady-state test data for a control volume in which two entering streams of air mix to form a single exiting stream. Stray heat transfer and kinetic and potential energy effects are negligible. A hard-to-read photocopy of the data sheet indicates that the pressure of the...

I often encounter situations in my professional development like if ( condition1 ) { // do this } if ( condition2 ) { // do that } if ( !condition1 && !condition2 ) { // do something else } and I handle it in exactly that manner. (Note: this is not an if-elseif-else situation...

I'm studying for an upcoming final and this is a question from a practice exam we were given. It looks simple but for some reason I just can't wrap my brain around it. The question is attached and gives a state space representation of a system (A, B, C matrices) and asks what part of the system...

My group members and I are trying to build a snow heating mat. So far, we are using nichrome heating wires sandwiched in silicone rubber connected to an arduino that controls a solid state relay to turn on and off electric current from a wall plug. What I want to know is how to control the...

Homework Statement Homework EquationsThe Attempt at a Solution (a) I find the steady state values (s=0) syms s k11 = -6; k12 = 3; k21 = 12; k22 = 35; G = [k11 k12; k21 k22]; Ghat = [k22/(k11*k22-k12*k21) -k12/(k11*k22-k12*k21); -k21/(k11*k22-k12*k21) k11/(k11*k22-k12*k21)]; Lam = G*Ghat...

Hi, Say you wanted to have a generator or motor stay at near 90degrees for maximum torque while generating or motoring, over various loads or over various supply frequencies. I assume there is some established method of controlling this (varying the rotor resistance with feedback perhaps?) does...

Homework Statement [/B] You are building a remote control car. The car has 50 mm tire diameter, and you want the car to travel on level ground at a speed of 9 mph. You need to select a single motor and gear head for the project. Provide hand written calculations and answers to the following...

I've been giving a look at some of the electives in my college - I'm a student of MechE - and became interested in Control Systems, specially after I borrowed some books in the subject in the library and read a little bit more about it. I wonder how big is the field of application of this...

Homework Statement I have a lab on pressure control but I don't really understand the setup. I was wondering if someone could tell me what topics,chapters I need to read/look over to understand the network of valves on pg2. Homework Equations - The Attempt at a Solution -

how can I control 2-way motor, to be specific I want to change direction after few rpm, is it possible to do it without arduino

Hi, I'm currently working on a project, and I need some info on halbach arrays. I have not taken University EM Physics yet (but have taken mechanics), so some of this is a bit over my head, but I have a few questions. Say I have a frictionless train, that is using a air bearings for lift, BUT...

Hi, I am proficient in standard dynamic programming techniques. In the standard textbook reference, the state variable and the control variable are separate entities. However, I have seen examples in economics, in which a single variable, let's say consumption, is both a state variable and a...

Homework Statement Hi, I have a project involving an inverted pendulum, as attached. Homework Equations - The Attempt at a Solution I don't really know about some things: First, is theta the only required input from the inverted pendulum system to Labview? Don't I also need the position of...

Homework Statement A factory has two zones. Zone 1 and 2 are both maintained at 75FDB. The design supply air flow rates to Zone 1 and 2 are 320 and 200 CFM, respectively. At a certain hour in summer, the cooling loads for Zone 1 and 2 are 6,000 Btu/hr and 3,000 Btu/hr, respectively. Assume...

hi, i'm doing a little research and in need of help since I'm not so talented in physics.. :( Is it possible to attach 2 cars with magnetic force so that they can be driving as one? (one car in the front and another car behind) I think it can be done with magnetic force but how.. Also, Is it...

I have 3 streams entering my vessel and 2 of the streams are dependent on the 3rd stream's flow rate in a certain ratio. Is there a way to control the flow rate of the 2 dependent streams using the flow rate of the 3rd stream and show it in my P&ID?

where i can found an example A FORTRAN control volume finite element method code FOR FLUID FLOW PROBLEMS thanks for help

Dear all, I am investigating a Transient Optimal Heating Problem with distributed control and Dirichlet condition. The following are the mathematical expression of the problem: Where Ω is the domain, Γ is the boundary, y is the temperature distribution, u...

Hello, I have a fundamental question about why state space control techniques are superior to the classical methods. I l know that you can control a system with multiple inputs and outputs for several states using state space control, however, can't the same thing be done in classical control...

Homework Statement Homework EquationsThe Attempt at a Solution Hello, I get confused with input and output and state variables. Since we want to control ##C_{Ao}##, I assume that needs to be the output variable in the vector ##\vec {y}##. I think the inputs should be ##C_{Ai}## and...

How to control magnetic field produced by a permanent magnet which is being induced on to a coil ?

Homework Statement [/B] Here is the problem: And this is the system in question: Homework Equations G(s) = θ_0(s)/θ_i(s) = output/input (open-loop transfer function) The Attempt at a Solution I've been staring at this problem and looking through my textbook for over an hour but...

Suppose a motor is run at 1500 rpm and field rheostat is at minimum position (say 10Ω). Then the field rheostat resistance is increased to 100Ω and the speed obtained is 1700 rpm. Now the motor is shut down and started again. Will it now run at 1700 rpm? My logic: No it won't, because: the...

Hello, In a linear system of the form $$\dot{x}=Ax+Bu$$ and $$y=Cx$$ we can use state feedback control $$u=Kx$$ assuming we know the state, or can observe it, to control the system if (A,B) is controllable (all states are reachable). How does the theory on controllability apply to output...

Hi everyone, I'm taking a Design of Experiments class which is focused on statistically designed experiments. I'm a bit lost for project ideas and this is my first graduate class. Would anyone have any ideas for an experiment that would have at least controllable factors that might have...

Homework Statement [/B] Homework Equations Listed under 2.1 in the image above. This is the only relevant equation that I'm aware of, but I'm almost sure that there is something else I need to know before I can solve the problem. The Attempt at a Solution I tried solving for the...

I am looking at control theory but I don't understand how this is used in real systems. Lets take an example of a cruise control system on a car which is also a control system. I can use an embedded computer connected to a hall effect sensor which measures the speed of the vehicle and also...

A rod is radially mounted on a motor shaft and provided with a flat end plate. By turning movement, the end plate will touch a pointed object, and the angle turned is measured.By the torque of the motor during acceleration and deceleration, a vibration and deflection happens on the rod. The...

hi, i want to derive a model of digital control valve. i don't have physical valve with me. still i have to develop such a simulator which can behave the same as the digital control valve. the working concept of digital control valve is little bit different than normal control valve. here is...

I know that decoupling the 3 phase currents we get the id and iq (in rotor frame) currents which control the flux and torque respectively. But where does the relation come from?

A friend asked me to write him a program that contorls a lamp with USB or LAN cable I've seen people using printer cables with Matlab to control an LED matrix .. I use c# as programming language if there is any way or any command that i can use to control it with windows form application or...

Hi all, Like a lot of folk on here I am interested in the idea of a CMG used to stabalise a single track vehicle.<< Link to CMG info added by Mentor >> https://en.wikipedia.org/wiki/Control_moment_gyroscope I have designed this; the pink discs spin in opposite directions and the pendulum...

I am new to flux oriented control and i read that this method is to decouple the stator current, one component for flux producing and other for torque,so that so that we can control these two current components to control an AC motor like a DC one(right?) However when i try to dig into detail...

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown > Hi. Please see question no. 1 in the attachment. If i take the inverse Laplace transform or the Z transform, how can i actually get the value of sampling period 'T'. or is there any other way...

This is more of a user experience question. I'm starting to remake a game (see http://playclassicsnake.com/play ) that works on mobile just as well as desktop. On desktop, one controls the snake (the lime green links) with the arrow keys, but I need a different way to do it on mobile. I tried...

Hi all, I was trying to simulate a direct torque and flux controlled induction motor in simulink. Even though I've managed to control torque within the band, i can't seem to be able to control the flux. It stays for a while within its hysteresis band and escapes after about 0.1 sec and keeps on...

So I was starting a project and have run into a small issue. I was following a tutorial and the code is not compiling correctly. The error reads as: Arduino: 1.6.3 (Windows 8.1), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"...

Motivation: I am working with a code that minimizes the objective functional value in an optimal control problem. It takes $A_1,A_2,A_3,A_4$ (the balancing factors for various components of the objective functional) as inputs, and then outputs the values of the state variables, control...

I have two tanks next to each other, first needs to be kept at 200 mmHg vacuum & the second at 500 mmHg. Both are attached to a vacuum header which can achieve a 600 mmHg vacuum by means of a water jet ejector. What is the best way to maintain the vacuum levels? Would a set of globe valves...

Hello everyone! I have a thesis to design a temperature stabilizing(controlling) system for solar cells.I need to use 12V Peltier battery and a simple pc fan.Any further help is appreciated.

Homework Statement Hi, i have been trying to solve this equation for the past 2 hours but am not getting anywhere near the given answer. If anyone can solve this it would be greatly appreciated! Thank you.Homework Equations The answer is circled in red and was derived from the line above it...

http://www.iflscience.com/space/molecules-have-been-built-using-laser-beam-first-time Is there a way that fusion could be achieved with coherent control like this? If it can build molecules couldn't deuterium-deuterium be achieved?

How controlling a device is possible using wireless communications systems like software defined radio?

We know that some genes produce mRNAs (and then proteins) and some other genes produces just ncRNAs (non-coding RNA) that play regulatory roles (yes, I know that some ncRNAs play other roles, but let’s forget about them now). I want to know a bit more about this regulatory processes. Does every...

In last days two very important stuff (Tsiparis annoucing referendum concerning accepting bailout conditions and terrorist attack in Tunisia) got covered by US homosexual couples... So far, for months, it was just usual bickering and last moment deals. It seems that this time is different...

Overview I'm trying to levitate a constrained permanent magnet with 2 electromagnets. I'm having trouble conceptualizing the control system for such an operation. Setup The permanent magnet is fixed onto a horizontal pendulum and is repelled by an electromagnet above and repelled by an...

Are there any good Nuclear control simulators, that can simulate the feel of the controls, and simulate the response from the reactor?

Hi I've been searching for a CMOS or CCD sensor with raw analog output and external reset/transfer control but has not been able to find this. Doesn't have to be great resolution. Anyone knows if there is a sensor like this on the market today? Best Johan