Control Definition and 1000 Threads

All of a sudden 3/4 of spam headed my way is landing in my Yahoo e-mail instead of spam folder. Any way to reset the filtering/blocking apparatus? the yahoo 'OPTIONS' button only allows me to decide how often the spam folder is deleted, nothing I can find about filtering levels...

I was trying to drink a vegetable smoothie, which I really don't like, and I vomited twice in the process. My friend drinks it without issue. What's the difference here? My conscious mind really wants to drink the smoothie, but a few gulps in I feel an uncontrollable gagging. I'm curious how...

I have narrowed down a control systems question I am doing to the following function in the S-domain.. numerator = (5s+1) denominator = (s+3)(3s+2)(s^2) Using partial fraction expansion - I compute A = 14/63... D = 1/6... B = -2.25 And I can go no further - because both MATLAB and MAPLE...

Hi, I am trying to provide a humid air stream along some ¼” tubing, where I can roughly control the relative humidity and temperature, this doesn't need to be exact. I already have a compressed air tank, regulator and flow meter to provide the correct flow rate. I need to find out...

Homework Statement Consider the electrical circuit shown: http://imageshack.us/a/img525/8163/p1circuit.png Let the state variables be x1(t)=Vc(t), x2(t)=iL(t), and x3(t)=Vc(t); output is Vo(t). Write the state-space equations in matrix form and find the transfer function, T(s)=Vo(s)/Vi(s)...

I was watching “Hell on Wheels” (nice series by the way), and with a train stopped they connected their telegraph terminal to the telegraph cable, and decided to send a message in a particular direction. How was this done? How is the direction for sending the message controlled? Thank you Regards

I have a single phase DC-AC inverter (or H-Bridge) with an inductive load I want to design a controller that controls the PWM signals to the control side switches that will ensure there is a sinusoidal current through the load. I need to use PI control and implement into a DSP so it has to be...

This question is related to adaptive cruise control in new vehicles. Adaptive cruise control automatically determines the speed at which a vehicle should be traveling by measuring the distance between it, and the car in front (mainly for use on highways) There is a general rule that three...

Most nervous systems use electrical signals from the brain to control the body. Could one not theoretically interface a computer with the first vertebra to override commands from the brain, and control the body? I'm sure that biologists do not yet understand the nervous system enough to...

Simple Question (I hope) being that air flow and water flow are similar...I own a Hobie ProAngler Kayak that I've modified. I built a transom mount and added an electric trolling motor (Motorguide, Varimax T-55). The Kayak's normal propulsion is a pedal drive system that uses wing-like flippers...

I want to controll ac motor using pwm.sir told me for that you required volage controller and phase controller.if voltage is controlled by pwm so why i want to use this phase and voltage controller?

Homework Statement A car park has 5 parking slots. When the fifth car enter the car park, a red light notification will turn on indicate the car park is full. When the car park cars decrease from 5 to 4, the red light is distinguished. Homework Equations The Attempt at a Solution I set the...

Hello All, I am new to the field of "Control of Quantum Systems". However the things that I know are: Controlling quantum mechanical systems is a challenging job because if want closed loop (feedback) control and measure the systems's output, the output itself changes (because in quantum...

When the voltage / frequency is maintained constant in 3 phase Induction motor i.e. flux is maintained constant by changing the voltage and frequency in same proportion, What is the torque proportionality equation. Whether Torque is proportional to Slip X Frequency or Torque is...

Hello, Could someone please explain in a short summary what the difference between the following are: 1. Dynamic Programming from Control Engineering literature and Dynamic programming from Reinforcement learning literature? 2. Approximate Dynamic Programming vs Differential Dynamic...

Hi all, got a Control question here, and I'm struggling with what I assume is a simple algebraic step. Thanks in advance! Homework Statement A closed loop control system governs the level of water in a tank (H(s)) to meet a target height (Hi(S)). The flow of water into the tank is controlled...

Homework Statement Air is to be compressed from 120 kPa and 310 K to 700 kPa and 430 K. A heat loss of 20 kj/kg occurs during the compression process. For air: cv=0.7165 kj/kg.K and R=0.287 kj/kg.K . A) Neglecting kinetic energy changes determine the power input required for a mass flow...

Hi guys, I am doing a final year project this semester on the above topic. I wanted to know whether to implement hardware or using software like Matlab. Thanks in advance.

I was thinking of using a 3 speed or dimmer switch to control the motor speed.

Hi. I would appreciate if some one could help me with my question. But first some background: There is a classical problem of inverted pendulum under control. Pendulum can be put to UNSTABLE equlibrium and (if no control applied) it can put itself to STABLE equlibrium. So system under...

Hi, I'm looking into the control of a PMSM (permanent magnetics synchronous motor) motors using H-briges and PWM (puls width modulation). I'v seen motor controllers that use a PID controller for speed regulation. The output of the PID controls the PMW. This makes sense to me because the PMW...

Hi there - I'm trying to build a decorational device that holds a rather heavy ball and I want to be able to control it's "movement/roll" in the X and Y directions (they are horizontal as well as orthogonal). The two black cylinders (X and Y) aren't floating, but I forgot to draw their...

need ideas for graduation project in control field

Homework Statement Given a parametric eqn for the x,y coordinates , x(t),y(t) , how can i find the control points? Homework Equations de Casteljau's algorithm is used to compute the value for a given t given the control points. The Attempt at a Solution Control Points 0,3 are given...

I want to what is the actual job of a Control and signal processing engineer. And does he/she has any kind of job type in power plants or energy supplies? hope to get an answer as soon as possible. Airer

Hi I have an old electric paper guillotine. Guillotine have two esential functions apart from those associated with positioning the paper ready to cut. 1. Using power (usually electric motor) to operate the blade which cuts the paper stack. 2. Using power (an electric motor or manual turning of...

Hello, I'm having hard times with the following simple linear ODE coming from a control problem: $$u(t)' \leq \alpha(t) - u(t)\,,\quad u(0) = u_0 > 0$$ with a given smooth α(t) satisfying $$0 \leq \alpha(t) \leq u(t) \quad\mbox{for all } t\geq 0.$$ My intuition is that $$\lim_{t\to\infty}...

Hi everyone, I have a 24V, 15A D.C motor, and need to control its RPM. I know RPM is directly proportional to voltage, and so the answer lies in a technique to vary the voltage across the motor. I have looked into potentiometers, variable resistors, and pulse-width-modulation, but since I...

I have an air turbine, and it's critical that the motor speed be precisely regulated. It's very voltage-sensitive, so the fluctuations in the line voltage between 120-126 A make the motor speed too variable. How can it be regulated? A UPS might work. But it would have to output voltage...

I am looking to power a heater. According to the product specifications it will require 11.1V/26.4A to heat to 800C and 16.9V/33.1A to heat to 1000C. The manufacturer sells an expensive temperature controller which we would like to avoid using. It has been suggested to me that I use a variable...

Hi. I've just started working with the MPR121 capacitive sensor (at the moment I'm working with the MPR121 breakout board sold by sparkfun) for an application that involves detecting a toolhead's distance above a work surface. It's not a problem to ground part of the tool head and some initial...

If we were to introduced a set of un-entangled, but same polarized, photons as control experiment what would the results be of the control experiment? So we have the following three cases: Bell test Experiment: Send entangled photons Result is that P(-30,30) is not equal to P(0,30) + P...

I am trying to build a model of CANDU reactor core using a software called DYMOLA.For this purpose,I am trying to figure out a mathematical relation between coolant temperature and Power developed in a reactor.I have the following questions: 1.What is the effect of increasing the neutron...

Hi everyone I am new here! and i desperately need help.. Im making an AIR to FUEL ratio control system for IC engine...its a project i started working on but i have a deadline in almost 3 weeks... the layout is simple...theres airflow on one side and fuel flow on the other side.. both of the...

I currently have available a 12V DC source and from that I want to power 3 LED strips but I want to be able to either have them all on at the same time, blink the strips in a pattern, or have them off. I have done some research into 555 timers but it looks like they won't be able to handle the...

http://abcnews.go.com/blogs/health/2012/05/23/epilepsy-miracle-diet-prevents-seizures-scientists-may-know-why/ It's been known for over a century that the ketogenic diet is effective but a lot of parents won't adopt it because it requires complete control of every meal. They opt to try and...

Hi all, I have a MIMO system which I have developed in Simulink and I have also work out the Model predictive control for it. Now I have a manipulated variable which I want to be used during night and remained turned off during day. I have tried but could not figure out how to do this in...

Homework Statement This question came up in a computer science / robotics exam and I still don't know the solution for it. I figured out that it's classical mechanics related, so I thought this might be the best place to ask it. Homework Equations C = A*x + B*dx/dtThe Attempt at a Solution I've...

I'm working on a unlimited time final exam. There is a problem that I have been thinking about for the last three days but I still couldn't get it. It is worth about 15% of the final and the final is 35% of my grade. I could work on the final for another 5 days before I turn it in. Now the...

Homework Statement I am supposed to design a control system with feedback and disturbance feed-forward, with all relevant transfer functions. The system consists of an oven where the temperature T is controlled by an electric heater that dissipates power P_{in}. The temperature outside...

Homework Statement C = 4 μF L = 0.2 Hy E is DC current. No internal resistance. Write an expression the the laplace plane transfer function, that relates current (that flows through resistor R) to the voltage E. (There is another question. I will just address the first one for...

Not sure if this is the right forum, but I'm an electrical engineer studying controls so here goes. Here's my background on what I know. Lead or lag compensators generally have the form C(s) = K*(s+z)/(s+p), i.e. the controller has a DC gain and introduces a pole-zero pair. In the case of a...

Homework Statement http://img543.imageshack.us/img543/7906/ddd2e.jpg To translate from Hebrew from left to right: Net Voltage 220 Vac, Pull Down Transformer, full wave rectifier (marked with a, b, c, d), below it is a "load" (or resistance), and to the right it says "a circuit to control the...

I have a given system and I need to A) determine the transfer function B) find the values of K form Routh-Hurwitz C) Determine the values of K for the stable region D) Create the simulink model. I want to know how to write my MATLAB code so that I can solve what I need to. I DO NOT want...

Given the following system (d(t)=0), I'm supposed to calculate the steady state error for unit step and unit ramp inputs respectively. Basically, the open-loop transfer function of the system is \frac { 3s+0.5 }{ s({ s }^{ 2 }+3s+8) } The closed-loop system is \frac { 3s+0.5 }{ { s }^{ 3...

We use this plane called the "Laplace plane" to solve problem in control-engineering, second order systems. Can anyone help explain the Laplace plane in simple words? I find the wiki article too fancy for me... it says that it "is a mean or reference plane about whose axis the instantaneous...

so i made a state space model of a physical system where A matrix is 4 by 4 and B matrix is 4 by 1. I have 2 inputs in the system and 1 output. I used Matlab to create the A,B,C,D matrices and i used the ctrb (controlability matrix), then the rank function. instead of rank 4 (full rank) i...

Hi I am i need of some advice with regards to completing my dissertation. It was based around the idea that i should develop a humidity based control system and integrate it into a temperature control chamber to fully develop an environment chamber. I am basically quite far behind in writing the...

Let's say I have the following transfer function: G(s)=\frac { s-1 }{ { s }^{ 4 }+2{ s }^{ 3 }+{ 3 }s^{ 2 }+{ 4s }+5 } Which is run through MATLAB to obtain the pole-zero format: G(s)=\frac { s-1 }{ ({ s }^{ 2 }+2.576s+2.394)({ s }^{ 2 }-0.5756s+2.088) } Using a quadratic solver...

Hey everyone, I'm brand new here, so please bare with me if my question doesn't come out right. Homework Statement So for my senior design class I am working with a control system that balances an inverted pendulum. Here is my SIMULINK diagram...