Control Definition and 965 Threads

Hi there, we recently completed a laboratory session on MATLAB relating to an RLC Circuit and arrive at a code and relevant inputs and got our graphs as shown below. I was just wondering if anyone know if these are correct and make any sense? Or any other comments appreciated. We also have...

I am a hobbyist, and I am not too familiar on to how to run motors. Can someone help me design a simple circuit that drives a dc motor on pulley drive of a conveyor belt. I only need a steady speed, I am not changing speeds. The conveyor belt has to stay on for 5 seconds after a switch is turned...

There are three speed control methods in a shunt DC motor - Field resistance control Terminal voltage control Armature resistance control In the field/flux control method induced torque decreases and speed increases due to decrease in flux, that is why power remains constant. This is what I got...

So I'm taking a bunch of pics at regular intervals to show my class how this borax/glue slime slowly collapse and spread. This happens over the course of a few minutes and it gave me an idea. Is there any software out there that you could hook up your digital camera to and have the software take...

I'm working on a thought experiment and I have a question about trapping a pulse inside a looped preparation . If a pulsed particle beam is prepared with a definite energy(E), bandwidth(ΔE) and positional uncertainty/coherence length(Δx) is the pulse able to be trapped inside of a loop type...

I'm trying to make a small crystal radio and have managed to wire up the antenna and the head phone jack but I haven't got any diodes suitable for the voltages I'm using. I have some LEDs but will these dissipate too much current or cause any harmonics or interference with the signal?

(Go on easy on me, this is my first attempt and first course at control engineering) Homework Statement In systems who has a huge consumption of hot water, such as food factories, chemical industries or hospitals, it's customary to heat the water through fuel type "mazut". the hot water...

Homework Statement Identify 10 feedback systems that you encounter in your everyday environment. For each system, identify the sensing mechanism, actuation mechanism and control computation. Describe the uncertainty with respect to which the feedback system provides robustness and/or the...

How are cell membranes enlarged? What is known about how this process is controlled? How might I read more about this topic? I am mainly asking about animal cells.

Hello All, A friend and I took on a senior project design that is certainly proving to be more difficult than anticipated. Here are the details: Design Challenge: Self Balancing Motorcycle Description: A picture of our prototype is attached. The motorcycle is remote controlled with...

hello friends..i really need some help on my project, i am going to design a control system for a lawn mower..this mower must be able to move by itself using PIC as the brain,can avoid obstacle,move along path created on the field..what details component must i buy aand how to assemble this...

Hey everyone, I am an undergraduate mechanical engineering major considering a EE feedback controls course as an upper division elective. I have taken ME Control Systems and am also the Lab Instructor for it this semester. I am familiar with signals, filters, sensors, controllers etc. My...

hi member! i would like to have your ideas on how to program my microcontroler to input a specific value to the light bulb so as the brightness to be as specific as i require, if any fore circuit is also required,i'm here to accept and utilise ideas

Homework Statement The system is given by: G(s) = 1/((s+0.1)(s+3)) I need to convert it to G(z), it's discrete form. The sample time T is 0.1 seconds. Homework Equations To convert it they give G(z) = (1-z^(-1))*Z-transform[G(s)/s] The Attempt at a Solution Obviously I...

Hi guys, I am trying to put a series of differential equations into sate space form. The problem that I have come up against is that I end up with a differential in my B term (control matrix) and I am unsure of how to deal with this. Is there an easy way of doing this? Does anyone have any...

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...

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...