Control Definition and 1000 Threads

Homework Statement So the first part of the problem asks us to solve for the state transition matrix, which I found to be: Phi(t) = [2 0 0; (2-e^-t) e^-t 0; 0 0 e^-2t]; I need to find the matrix A, which I assume can be done with the following relation: Phit(t) = e^(At) where A is also a...

Edit: sorry about the title, it was warped when I pressed Control + z a few times. This is a question about monomials. Homework Statement How do I simplify (2n)4 + 2n4? Homework Equations N/A The Attempt at a Solution The problem I'm having is with the parenthesis. So really I...

I'm interested in designing a control system that will sense the temperature of my charcoal smoker, compare that value to a predetermined value (which the user is able to set) and then, if necessary, turn a fan on to stoke the fire to raise the temperature. This system would be constant...

I'm trying to pick up optimal control by self study. At the moment I'm working on linear quadratic regulator and trying to reproduce the result publish in this paper. Curtis and Beard, Successive collocation: An approximation to optimal nonlinear control, Proceedings of the American Control...

How can I accurately control the Joule Heating effect of a length of Tungsten wire to certain temperature ranges? The tolerance would have to be no more than a maximum of +/- 2°C. Would I require alternating or direct current and/or any other associated instrumentation? I have little or...

Hi, I am building control panel for automation testing unit. - Ambient Temperature to measure:- - pulley speed and temperature to measure. So far... for Ambient Temp I have used T-Type and for pulley speed I have used magnetic pick up 10V. And for interfacing used USB6009. Can...

Hi everyone :) I have been exploring this forum as a guest and just created my account I just want to talk about a situation I encountered at school today. My physics teacher is a quite nice guy and really tries to make our class fun. One day, we got into a discussion about appropriate...

Question is simple. Your opinion all round? Thanks.

can someone please give me some ideas of control system projects which have someinterface with computer?

Suppose you have a reaction wheel or a control moment gyroscope on your spacecraft for attitude control. This would be a self contained unit, with 3-axis control. Either device utilizes the conservation of angular momentum, trading angular momentum between the unit and the spaceship frame as...

Most books I looked for Control Systems seem to be written by Electrical Engineers. Is there a good book which is written from the point of view of a Mechanical Engineers?

Hi guys, this is quite an inbetween question , not really homework but still theory. http://img850.imageshack.us/img850/1290/81696653.jpg Came across this diagram and was wondering if the arrow (in blue box) can be ignored ? Quite irritated by it now since I can't be sure how I should...

Im building a yaw control system for one of the universitys VAWT turbines. Basically I am struggling to get an equation described below: there should be an algorithm such that the system should try to yaw the turbine as fast as possible, but without causing too high forces on any key...

What will happen if an ac inductions motor is running, an suddenly an error occurs in the voltage pr. hertz motor control so the stator frequency goes down below the rotor frequency for 1-2 sec?

Hello, I have purchased a Casio CMD-40B watch. It functions as a remote control for your TV and Cable boxes. How it works is, you look up the specific TV's "code", tell it to the watch, and your watch now acts as the TV's remote control. Here is the Watch Manual...

Hi all I'm having a bit of trouble trying to calculate the Upper and Lower Control Limit on R chart. The file "QualityIndex1180" contains the information from which I'm doing my calculations. Ob1, Ob2, and Ob3 are basically 3 samples that have been taken the first of 15 batches on some...

Hey guys I have a project that I am about to start working on. I am going to need a small level PLC to implement the design to control a few very small motors to move conveyers and a few pounds of weight, as well as a few various sensors. The machine will need to do various things based off...

Hello, I am having trouble figuring out how to use Control Characters in Fortran. My professor skipped over that chapter back in my Computational Tools 1 course and I am trying to figure out how to use them. I am currently compiling my programs in the GNU Fortran compiler if that helps any. I...

Hi guys, I could use some help on the proof of a verification theorem for the following optimal control problem J_{M}(x;u)&\equiv&\mathbb{E}^{x}\left[\int_{0}^{\tau_{C}}\left(\int_{0}^{t}e^{-rs}\pi_{M}(x_{s})ds\right)\lambda...

Can you give me some advice of this topic? Thank you!

Does anyone understand this? How do you get more torque by slipping the clutch? I slip the clutch to reduce torque to the wheels until I get going while maintaining power by keeping the rpms high.

Hi, I am trying to control a voice coil motor's force, which is directly proportional to the current through its coil. The direction of the force needs to be reversed, so I thought an H-bridge would be a good way to do it. I have read a lot about H-bridges but I am still confused about a few...

Hi all I have majored in mechanical engineering and I have taken some basic control courses in the universities so I am wondering how to control the aileron on an air craft or fins on a rocket so as to get the path you want. example : you want to change the air craft path to move up 10...

I thought that control rods were raised and lowered to control nuclear reactions. If so, why wouldn't they simply be lowered in a crises to stop the reaction?

Hi guys, I need to use the PWM output of a PIC microcontroller to switch a mosfet to drive a 9v brushed DC motor @ 115 mA. From what I've gathered, the mosfet should be logic level (fully on @ 3.33v since my Pic uses a 3.33v source). It needs to be able to handle...

Alssalam Alykom hi every one please I want to control output like parallel port or serial port by voice in MATLAB the problem how use voice to control ? thanks for ur help

Hi guys, Need a little help with an example my tutor and I are trying to work through. We're converting a dynamics system from a state space representation to a transfer function. This is where we are at so far... [s^2 + (C/Mb)S + (K1/Mb), -((C)S + K1)/Mb; -((C)S + K1)/Mw, S^2 +...

Hi, I have a small project coming up, based around modeling (and perhaps building) a small Micro UAV system. Its a small device with contra-rotating blades (for stability), and I want to perhaps model the control system using simulink but I really don't know where to start! The aim is for the...

Hi All, I am applying model predictive control to the ASTROM & BELL BOILER model, I am facing difficulty in handling constant disturbance, I am unbale to reject constant input disturbance, due to which my output drum level is having steady state error, I have applied INtegral + MPC to over come...

How does one go from the simple substitution to the end result? \dfrac{U(z)}{E(z)}=K'_P+\dfrac{K'_ITz}{z-1}+\dfrac{K'_D(z-1)}{Tz}=\dfrac{K_Pz^2+K_Iz+K_D}{z(z-1)} Found the above simplification in http://www.nt.ntnu.no/users/skoge/prost/proceedings/acc04/Papers/0008_WeA02.5.pdf" in Eq 23-24...

I'm trying to understand the concept of a control system in electronics. In a control system, we have a substractor, forward path and feedback path. The forward path is described by a function g ( a gain function ) and the feedback by another function ( gain again ). The input is Xi and the...

Homework Statement attached, part a is easy one where is the T=70F and 5 atm, second question really doesn't make sense for me at all! Homework Equations The Attempt at a Solution

Hi, I'm doing 2nd year (sophomore year) in Mechanical Engineering. I'm going to do a summer internship on 'Power Plant Control and monitoring' (this subject was assigned to me)...but as you all know, I've got to do an Engineering Project (Final Year Project) later on...so I was wondering if...

I am working on a project where I have a ball-screw type linear actuator being driven by a 24V variable speed DC motor. There is another 24V DC motor that drivers a pinion and ring-gear. The linear actuator controls the system's elevation and the ring gear controls the traverse. I would...

Homework Statement In control engg. we define the order of the system as (or atleast as far as I have understood as) Nu/s^m*(s+a)(s+b)... I cannot understand the base for such classification? Why are we classifying systems based on the number of poles they have on origin? Homework...

Homework Statement Reading my text I see the definition of open loop transfer function as GH and closed loop as G/1+GH I cannot understand the def. of open loop t/r func. Shouldn't it be just G? (B/w with open loop I understand that there is no feedback...) Homework Equations The...

Hi, I wanted to create my own computer fan control and bought a 100ohm potentiometer. I have hooked the pot as shown in the picture except that it is in the yellow wire (+12V) and not the red one (+5V) , black is ground. The fan will start at full speed and doesn't change one bit if I...

My system is a compound pendulum hinged at some distance from one end and have a propeller mounted dc motor at the other end. I wish to position the pendulum with the help of motor propeller system. I tried but i am unable to get a mathematical model for it. I am getting a non linear model...

Since I last posted here, I've experimented with small DC motors, parallel and series circuits, messed with my electronic-building kit, and even did a little Job Shadowing (temporary internship) at a local electrical engineering place for school. I definitely want to make this into a profession...

Hey everyone, So we know that closed quantum systems evolve according to the Schrodinger equation. Now in open-loop quantum control, we essentially only ever deal with the operator version of this equation i\hbar \frac{d}{dt} U(t) = H(t) U(t). That is, quantum control is often done in...

I am doing research on the Chernobyl disaster. I came across something that seemed strange... Apparently, the control rods were covered in graphite moderator. As far as I'm concerned, a control rod absorbs the neutrons and stops fission reactions. However, the graphite moderator's function...

So I have a control systems mid-semester exam coming up and the lecturer has posted up a formula sheet for us. However it is different to past years exams and has a geometry section with the following equations: e^(±jθ)=cos(θ)±jsin(θ) cos(θ)=(e^jθ+e^-jθ)/2 sin(θ)=(e^jθ-e^-jθ)/2j Now I've...

I'm looking for information on how hot swap PSUs as used in computers (used typically for data center servers) are designed. In particular, I want to focus on the common aspects between the 2 or more PSU subunits that can be swapped. What kinds of connections are made between the individual...

For some programs I frequently use, I must click on a confirmation box each time I run them. This box does not show up if I don't run them as administrator, but if I don't run them as administrator I cannot save/edit files with these programs. I want the confirmation box to not show up for...

Hi, all. (please see the attachment in the next post) I'm re-using an old power converter in a design, which unfortunately requires a rather large minimum load to properly regulate. I can't alter this converter; I have to use it as-is. But, I can monitor the output, and add circuitry as...

Homework Statement The following problem can illustrate the economics of insulating the floor above the vented crawl space. A) If the composite structure of the floor is made up of carpet (R value of1/2 〖ft〗^2-h-F/Btu), subfloor (R=1), and air space between the joists (R=0.8)then find the...

I am preparing for my control theory exam, but I have come across that I am struggling. I have a third order system and its asking to me determine when a value of an adjustable parameter, K for when the system is critically stable. I just don't know what this corresponds two for a third order...

Hi, I assume this forum is not only for help with engineering problems, but also a community of experienced industrial engineers of all areas. I'm graduating this year, with a mixture of knowledge from mechanical / control engineering, some of this has consisted of PLC and Matlab programming...

Homework Statement Two tanks with water, connected in the bottom by a pipe (known area (a) and length (L)). One of the tanks have known bottom area (A). a= 0,03m A= 1 m L = 40 m Input: hight of tank1 (h1) Output: hight of tank2 (h2) I am asked to: - Draw block scheme (H1= tank1...

When we move any part of our body for e.g our hands, obviously, our brain contro9ls each and every movement of our body and the processes which are involved in it. The question is that how does the neurotransmitter get involved in such movements ? I mean, it is understood that there are...