Control Definition and 1000 Threads

After bearing failure of 24V, 15A dc motor. We change the bearing of the dc motor. But after changing it the motor is running forward/ reverse but there is no control over the speed. Where is the problem? Is that in the techo or drive card? Any body please help. Helping in highly appreciated...

Hi, I have a motor with no information, not even a label, just the connectors, I was wondering if there was a way to measure its power and if there was a way to control it without affecting it's velocity, I possesses simple elements, some sensors (inductive) and a manometer, my brain is now dry...

Dear All, can anybody help me with the design and development of control loading system for a fixed wing aircraft using MATLAB/SIMULINK. Thanks in advance. Regards, Ashok

Homework Statement Homework EquationsThe Attempt at a Solution Process actual at 300 Transmitter range 100 - 420 Output 4 - 20mA Output Actual 15.43mA Conditional output 3.85 PV and SP at 300 Valve position at 30% Anyone can help if I am on a right track? I am not sure how to start...

Hi everyone! This is my first post. I hope I am posting in the right place -- if not, please let me know. I am also hoping my question will not sound too absurd; I am no physicist, just someone who would like to use complex technology to create an art installation, and I'm having a hard time...

I have some questions related to how a discrete control system is designed. One method is to design the controller in the continuous time domain, arriving at a transfer function (in the s-domain). After that, a transfer function for the ADC system must be taken into consideration. I will suppose...

ME student here. I have managed to get through two control theory courses at my university, which I have managed to get A+s in despite having no idea why I am doing all of it. I understand the math (i.e. why RHP poles are not good for the system stability) but do not understand what any of it...

I have this problem and have been pulling what's left of my hair out: The Wivenhoe hydroelectric power station requires water to be pumped from Wivenhoe Dam to Splityard Creek Dam, using two pumps (each consuming 250 MW of power at 98% efficiency) to elevate the water approximately 70 m. At...

Hey, I would like to know how I can determine and control the temperature of a wire at a specific point of temperature. I want to control the temperature from 100-300 celcius. This can been achieved from the ampere load of the wire? Or please send me your opinion of how it can done in a...

Help! I am connecting a Sergent control panel (to power a motorhome 12v/240v system), with a 1200W converter for a solar panel that trickle charges a 12v battery and a leisure battery. This would not be the problem but my truck runs on 2 batteries that run 24v. Does anyone have an idea on how...

Homework Statement I'm struggling to perform a symplectic reduction and don't really understand the process in general. I have a fairly solid understanding of differential equations but am just starting to explore differential geometry. Hopefully somebody will be able to walk me through this...

So I have looked over a few other posts and do not feel like they are covering what I would like done. So I am currently using an Arduino Uno for the controller and am wanting to use an onboard Raspberry Pi in order to run the code and will be attached to my schools wifi in order to have a...

hello there, i just want to ask some questions related to PID controller. currently, i have run zumo robot to detect line by using PID controller approach ziegler nichols method..however, by testing P,PI, and PID, P gives the most accurate when zumo follows the line..which is better actually? P...

Although this could fall under engineering, I thought the Diff Eq forum was the most relevant. Let me know if I should post elsewhere. I have a fairly basic system for which I'm trying to find a minimum-time optimal control policy. I know there are many ways to do this numerically, but since...

I search after information that can explain to me more about what a control engineer in robotics company should to know how to do in these areas: 1. Choose the right controler 2. Control methods and analysis 3. Write the code for all the robot include sensors, motors, drivers, hydraulic and...

Homework Statement I'm doing an EPI on horizontal circular motion and for one test the independent variable is mass and I need to control the velocity by using the 2πr/T formula. So I know how to use the forumula to find an unknown but how do I use it for two unknowns (r and T). Is there a...

Hi Guys, I am working on a design trying to control a model through inverted V-tail/ruddervators only. No aileron or horizontal stabilizer. Do you think it is possible as apparently I am facing instability issues. Any guidance in this regard would be helpful. Thanks

Homework Statement The Plots bellow show two discrete time signals, in the plots only the initial proportion is shown. Then the signals remain constant and equal to the last value shown. Derive the Z transform of each Signal. The attempt at a solution I can get part A, giving an answer of...

Homework Statement Hello, I'm trying to reduce the following block diagram Homework EquationsThe Attempt at a Solution I appear to be having some issues in doing this. The first thing that I did to reduce this block diagram was to take the forward path that has 2/(s+4) with negative...

Hi, I'm reading Ogata's Modern Control Engineering, and when he talks about the representation of a differential equation in state space he divides the method in two. The first one is when the input of the differential equation involves no derivative term, for example: x'(t)+x(t)=u(t) The...

For certain system i have to control two magnets , to catch up when they are " on " , and the opposite , how i can do that ??

Ok, say I have a sine wave block that has a frequency of 60Hz. What can I do to get that frequency as a number so I can use it as an input to another block? I've tried various things such as a "sign" block that counts when it switches from positive to negative and then a counter that resets...

Hi everyone, I am trying to implement the current control (Id, Iq) of a four pole PM synchronous motor. I am having trouble in making the Iq current follow a set reference. I had also implemented a cascaded speed control for a dc motor. In that case, I adjusted the gains of the PI...

How can I control the refractive index on a material, I mean on what depends the refractive index? Because I am trying to create like a controlable light diffuser mechanism. Thanks and regards.

<< Mentor Note -- post separated out of a different thread to deal with a separate question >> Hi, I am looking transmit as well as receive power within close proximity. Currently I am looking at 27.255 MHz AM in the citizens band. It is listed on Wikipedia and in statues I found to be for...

Homework Statement , [/B]I have to recommend a linear portion control sensor, that can be used in an explosive enviroment. Unsafe electrical contacts should be avoided and the case must not permit any dust or water.Homework EquationsThe Attempt at a Solution . [/B]My thoughts are either a LVDT...

Hi Masters. I'm searching for control rod materials and so far I got the ones listed below. I know that the material selected for control rods should have a good absorption cross section for neutrons and have a long lifetime as an absorber. I just wonder the materials and compounds used in...

Water is poured into two containers separately at two different rate. Will the rate of increase of water flow affects the pressure building up? Can the pressure affects the time taken for the water to overflow the container? ( One of the container is designed to avoid overflow, hence the rate...

Hi all, I am looking for circuits that control the pulse widths of digital signals and their applications. Specifically, I am looking for circuits that map and a single input pulse width x to a single output pulse width y through function f(x)=y. Thoughts?

Hi, I`m going to design turning table (diameter of 60-80cm) made from aluminium, it will spin by the mean of an electric motor. I want the spinning speed to be variable, so I can control it from 0 up to 300 rpm (gradually or by steps where each step is 50 rpm) by them mean of remote control...

It has been some time since I sat through basic aircraft dynamics, so I hope to check some conclusions about the topic. Clearly rockets and missiles have maintained stable flight via gimble of the engines. My understanding has been that designing, say, jet aircraft in this way (i.e. forgoing...

Hi Everyone, here is Hubert again. Here attached is my design and the problems I am facing. Can anyone be of help? Thanks in advance. Best regards Urbain

So I am trying to understand how a ULTC operates in the Reactive Power Control mode (it adjusts taps to control the reactive power in a line). What equation is governing it's operation, and what variables does it adjust in order to increase/decrease reactive flow? Is it just the simple reactive...

How to control the speed of 1.5 Volt motor?

After graduating with a BS in CS, I haven't really found anything in the field very appealing. However, after reading some things, I've found myself very interested in embedded / control systems. My question, is this a field I can pursue with only a BS in CS? Or should I go for a BS or MS in...

Hi, I'm a starter here! I am trying to build a buck converter without the use of any IC. I want to drive a single LED. Here are some calculated data: Vin =5V, Vout =3.225V, Duty circle = 0.651, L=6.8micro Henri, Switching frequency = 1.4Mhz, Desired current is 1A, I also assume ripple current...

Hi everybody, I have implemented PI control of a DC motor and it works properly at high speeds (50rad/s) but if I lower the reference speed to 5 rad/s, there are fluctuations in its motion. Initially, I thought it could be due to the limitation of my current sensor (LTS 6 np) but I added some...

Hello Everybody, Im a third year MechE student and I am focusing my studies on thermodynamics and control theory. I am getting really deep into the controls right now and after taking some introductory courses there are so many things that puzzle me even though I understand the actual theory...

Recently, I was trying to control the strength of an electromagnet with PWM over a MOSFET or IGBT with an Arduino/microcontroller. It worked but I burnt multiple MOSFETs/IGBTs while testing it, after certain time... so something must have gone wrong... I'd like to build a simple circuit, to...

Homework Statement Hi I am having trouble simplifying the attached diagram with respect to the return summing blockHomework EquationsThe Attempt at a Solution there shouldn't be any superposition since there is only one input signal, in the attached file I've simplified A to Be: G3/(G2-G2G3G4)...

I'm trying to understand the derivation of what appears to be a basic concept in control. This is for a PD controller of acceleration. I believe there would be similar derivation for other controllers, but I do not understand its origin let alone other examples? x.. = Ks.x + Kv.x. also written...

Homework Statement http://postimg.org/image/4a8sv6umh/ Why do the pressure forces due to p1 and p2 act in the same direction? Homework EquationsThe Attempt at a Solution I thought that, given the direction of the flow, the pressure force on the bottom and top would act in opposite directions

Homework Statement http://postimg.org/image/i4p19540z/ Homework Equations Resultant force on the control volume = Mass flow rate (Velocity outlets -Velocity inlets) The Attempt at a Solution I am just wondering if the 4cm is called depth, then what is the term for the "into the paper"...

I'm working on a pantograph device, which is not a linear plant, and implemented 2 different control schemes. First one is computed torque; For this control technique, I modeled nonlinear terms in the equation of motion and canceled them by injecting their model within the control input, which...

do any of you know how it would apply ?

Hi all, Just a quick question about control of axial flux synchronous machine. Does it follow more or less the same technique ( which include PWM, inverter and dq transformation )? Is there any major difference from control of radial flux machine? Thanks in advance. Regards.

I previously used the Ziegler method to tune the parameters of my PID controller to control my robot's position. I then implemented fuzzy logic for self-tuning the parameters. I have two inputs to the fuzzy logic controller; one is the position error and the error rate. I know that my problem...

hi there, I have 3 dc motors (12v-5 ampere)that are connected each with a speed reducer gearbox, actually I want to control these motors with a JOY-STICK switch just controlling there movements in fixed speed, should I use a pwm circuit to drive them or a simple 3-axes joy-stick is enough? if...

Hi Physics Community, I'm working on the design of an aileron less and tail engine small UAV (Wing span 800mm) but I got stuck in Stability and Control. I recall from a teacher that a V-tail design is good for those configurations. However, I cannot find references to calculate/estimate neither...

Hi! So i have been having this discussion with a friend. we have an old shaft going down about 100meters and we want to tie a 100kg sand bag and use it to generate electricity as it falls. (we will simply pull it back up) if my understanding is right, then: i can either generate 980kw for 1...