Control Definition and 965 Threads

Hello, I'm playing around with simulating drones (quadcopters) in Gazebo (an open source robotics simulator). The control system is made up of six PIDs (one for each degree of freedom) and I'm encountering trouble tuning the pids for pitch / roll control. In this case, the linear x / y and...

Hello, I am reading about this and I have a question , so let me explain how I understood this and please correct where I am wrong. I will ask about nuclear reactors because obviously in bombs only prompt neutrons matter since there is no need for any control only an exponential increase in...

Homework Statement Design a lag-lead compensator for the system of Figure 9.37 so that the system will operate with 20% overshoot and a twofold reduction in settling time. Further, the compensated system will exhibit a tenfold improvement in steady-state error for a ramp input. Homework...

Homework Statement A closed loop control system has three components, Controller, Process, and Measuring System. Each has it's own gain and phase angle. I understand how to find the total of the gain but I'm unsure as to how to find the total phase angle? Homework Equations Total Gain=...

Homework Statement Deriving an s-domain equation for the following inputs a) &b) The Attempt at a Solution I understand how to derive the equation for an input with zero initial conditions (part a) but I'm not sure what to do when there are non-zero initial conditions (part b)

Hello, guys. In field oriented control of ac machines, the electromagnetic torque is proportional to the q-axis current. We can control instantaneous torque by control the q-axis current. If the torque we want is a constant value,with PI controller, no problem, no steady error. But if we want to...

I have considered myself versed on a topic as broad as hydrolic and recently came to doubt myself on a simple idea of what it takes to actuate a hydrolic flow between a junction of two piston's, so taking in mind the simple shape in the image Could this be stopped once the flow is pushing only...

I would like to ask about some terms of control engineering. What are other common expressions for "moving a pickoff point" which can be used as" moving a pickoff point behind of a block" or as "moving a pickoff point ahead of block." Source:Self-made Thank you.

Dear all, I'm wondering how a control valve can control pressure and flow rate. I understand that a control valve in a pipe induces a certain pressure drop but I don't understand how this affects flow rate. I'm disturbed with the continuity laws which states that the total flow rate between two...

I need to source a two-way single spool valve for an on/off application that can be manually operated. Need to get an idea of rated flow rates. struggling to find a decent catalogue, so if anyone knows or can send me anything, please let me know Thanks

Hello. I need to simulate a power system including conventional generators, loads and wind farm. I want to measure system frequency and voltage esspecially. According to these values for any kind unwanted of voltage and frequency changes circuit breaker should be opened and wind farm will be...

I'm having quite a deal of trouble trying to figure this out. Say, for example, you wanted to have a statically stable aircraft. How do you determine what the signs (positive or negative) of the control derivates need to be for this condition to be satisfied ( CXα, CZα, Cmα, Cmq, CZδe, etc) ?

Homework Statement I was wondering if I can get some help on a Linear Regulator Problem for an Optimal Control Problem. Given a state equation and performance measure I am trying to solve using the Riccati equation on MATLAB. This is a sample example I got from a book Optimal Control Donald...

I'd like to test the quality and performance of an electrical item I intend to sell. I was able to find a similar, very high quality product whose quality I'd like analyzed and compared to lower quality alternative. Who should I send these two product samples to? A third party inspection...

My background is in mechanical engineering, but I'm working on a project for which I need to design a control system for a linear actuator. I want to design the actuator using a roller screw mechanism, which in turn will be conected to a 3 horsepower electric motor through gear reduction. I need...

I am studying ALFC and I have a few questions about it. Consider the flyball governor in this system. It senses the changes in speed of the turbine. If load is increased, the balls will slow down and will move inwards, moving point B upwards. Now, this will open some additional valves to allow...

< Mentor Note -- thread moved to HH from the technical forums, so no HH Template is shown >[/color] Hi! I am trying to reduce a PID controller by using block reduction rules but I am having some trouble Here is the block: https://postimg.org/image/9am5n8bsp/ My attempt: 1. Multiply...

Hey, I'm working on a project to build a drone which is powered through air jets. The drone needs a valve control system which can control the flow rate (hence the thrust) going to each nozzle in order to adjust it's altitude and stabilty. I need to set up a circuit which can electronically...

Is this line of research a reality? https://www.sciencedaily.com/releases/2016/01/160108083918.htm Produce and detect gravitational fields at will using magnetic fields, control them for studying them, work with them to produce new technologies -- it sounds daring, but Prof. André Füzfa of...

Homework Statement A control rod to limit the rate at which a nuclear reactor is working is made from boron which is sealed in a casing. A boron atom (105B) is able to capture a neutron; an atom of lithium (Li) and an alpha particle being produced in the process. As a result helium gas is...

I'm attempting to design a force feedback system for my senior capstone project. It will consist of a single lever that is free to move along a single axis. Imagine a video game joystick, but one that only moves forward and back. I need to mimic a given force profile along the stroke of the...

I am trying to use two limit switches(this one) and two DPDT relays to control the direction of the motor. When the power is applied the motor should rotate one direction (direction for this question isn't important). Also, at this point (initialization) neither switch will be energized. The...

if I heat a resistor, it will reach a specific temperature and keep it. because as temperature increases the resistance decreases, so reducing the power absorbed. is that true? and how to calculate how much current and voltage I have to deliver to reach a specific temperature?

Hi, Here's the problem. So basically I have an input shaft which has non constant Forces acting on it. Thus the input shaft speed varies with time. What I need is an output shaft that is speed controlled i.e. Speed constant with time. To add to it on the output shaft I have a large mass...

Like is your house insulated to updated code, double glazed widows, cavity wall insulation, Do you control you energy usage

After doing extensive research, I am still confused about Control Volumes. Say that there is water flowing into a cup at a steady rate, and I am required to illustrate the momentum and mass flows, as well as the forces, how would I approach this? I have seen examples of Control Volumes but they...

Hello! This question may be a little too specific but if there are any drone enthusiasts out there they might be able to help me out! I'm trying to understand the transmitted signals from a remote control to an air drone. When the user of a remote control, let's say, pushes up on the joystick...

Hello, I want to verify this question. In short, "Where did input matrix Bu arise from?" I was wondering why the state equation has to be in the form of x_dot=Ax+Bu. I got to the point that the highest order terms can be expressed in the form of linear superposition of lower degree terms. If...

Hi, I have quite a superficial understanding of Droop control: http://www.openelectrical.org/wiki/index.php?title=Droop_Control https://en.wikipedia.org/wiki/Droop_speed_control I'm not after a super technically detailed explanation, but if anyone has any more detailed sources for how it is...

Hi, I just want to double check my understanding of Power angle. Say you have a large network, and you have a bus with a small generator and a larger load on it. For power to be going into that bus from the rest of the network there has to be power angle between the bus and a bus(s) which power...

Anyone has schematic of remote volume control for stereo amplifier? It has to drive a motorized volume pot, not the digital attenuator type of volume control. Thanks Alan

I´m taking a course on control engineering and I have a test next Tuesday so I need to study the basics which are: Laplace transform, simplification of block diagrams, and analysis of transient and steady state responses. Right now I am dealing with the second one. I know the basic rules of...

Dear all, I would like to learn more about what happens to CRs during the reactor cycle. At the beginning of the cycle large excess reactivity is present in the core and has to be compensated with burnable absorbers (lumped in rods and WABA coating), chemical shim and CRs. There are several...

Hello everyone, This Moslem fathy, I am a heart surgeon, This is a video of a surgical device, I would like to understand its mechanism in some Aspects http://psdl.engin.umich.edu/pdf/Awtar_JMedDev_FlexDex.pdf this is a pdf that expalins the concept I would like to know how the movment is...

Hi. I have read some books about control engeneering . In some books, there are some terms which are ambiguous to me. The parts which I can`t understand is that "less mass axis(There are two axis in nanopositioning) frequency response for nomial load is plotted" and "with the maximum payload...

Hello, I have a question about steady state error. how can we get to the C? I think it has to be Ea(G1+D)G2=C which gives(R-NH)(G1+D)G2 / (1+(G1+D)G2H)=C

Problem: Suppose I have a production process that yields output in batches of n items. For each batch, I can test whether they are of good or bad quality. Let q_i ∈ {1,0} be the quality of tested item i. If more than half of the items are ‘bad’, the batch should be discarded. In other words...

Hi, I'm developing an application and I allow a user to select 'things' they want enabled and others they do not. I had a solution coded but discovered a new solution. While I can 'hard' code this new solution, featured below, I was wondering if C# (the language I'm using) has the following...

Hello Everyone. Thank you for reading this. :smile: I have a made a motion simulator pneumatically controlled. It is a bowl held by a stationary cradle with air cylinders tilting the bowl left,right, forwards and backwards. The software to control the cylinders is giving me fits. I am...

Suppose you are given a first order system whose transfer function is HP(s) = KP/(TP*s + 1). Now, you want to control this system using a standard P (proportional) controller whose transfer function is HR(s) = KR (a proportionality coefficient). There is also disturbance that acts upon this...

Hi! We have been having problems in controlling our documents. We always have a hard time identifying who made mistakes in the details encoded. I heard about this document control system. How effective is this? I want to hear from users before I suggest it to our boss. Thanks for your time.

Hello, PF! I've been learning some process control on my own lately, and some questions have come to my head while on it. Consider the following on-off control loop: Let's say we want to control the temperature of the fluid inside the tank. We set up an on-off control loop and establish a...

I'm a student of Mechanical Engineering and I've been taking classes on Control Theory. Looks like a cool and very interesting field of study, but it seems to be more inclined towards Electrical Engineering (in fact, looks like most jobs on control go to electrical engineers). I wonder how a...

Hello, I am Sherldonnnn. I'm very happy I can ask my questions here to get your help. If you can help me solving my questions that will be very nice. Now I am trying to control a stepper motor with a simple transistor-based switch. I still with to consult with the experts here on some basic...

Hello, I'm a mechanical engineering student and I'm working in traction control for Formula 1 cars. The traction control in the cars is simple, too simple: an engine cut is done when the engine is at a certain RPM and slip value. A matrix of four values of RPM and slip has to be provided to...

Hi, how do power operators change the droop setting in modern power plants? Back in the days it was with help of a flyball governor(?). In todays power plants do operators adjust some sort of gain electronically via a scada system or something?

Hi, I am new here and this is going to be my first post. I am pursuing an undergraduate degree in electrical engineering and I am absolutely fascinated by control engineering. I want to know whether I should take advanced math courses in order to better prepare myself for a PhD in Control...

I am a first year student in MSc Automation and Control Engineering in Politecnico di Milano. I was working as a Power Protection Engineer before my company decided to send me to do my Masters in the above mentioned degree. The management thought it necessary to at least have someone specialized...

Hi, MechE student here! I've become quite interested in control theory recently, and I've been studying it a lot. I thought about specializing myself in this field, but also, I want to work with aerospace. The problem is that control engineering looks like a EE field, and I fear that I wouldn't...

i have few queries regarding control system in electrical engineering... 1)transfer function is defined for linear system ? why is that so... 2)why transfer function is defined with zero initial condition...why not with initial condition