What is Pid: Definition and 87 Discussions

Pathways into Darkness is a first-person shooter action-adventure video game developed and published by Bungie in 1993, for Apple Macintosh personal computers. Players assume the role of a Special Forces soldier who must stop a powerful, godlike being from awakening and destroying the world. Players solve puzzles and defeat enemies to unlock parts of a pyramid where the god sleeps; the game's ending changes depending on player actions.
Pathways began as a sequel to Bungie's Minotaur: The Labyrinths of Crete, before the developers created an original story. Jason Jones programmed the game, while his friend Colin Brent developed the environments and creatures. The game features three-dimensional, texture-mapped graphics and stereo sound on supported Macintosh models. Pathways was critically acclaimed and won a host of awards; it was also Bungie's first major commercial success and enabled the two-man team of Jason Jones and Alex Seropian to move into a Chicago office and begin paying staff.

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  1. A

    Matlab Simulink-Using PID controls?

    Matlab Simulink--Using PID controls? I need to use Simulink to determine an approximate numerical solution to the equation of motion for a robotic arm (image below). The equation of motion for the system is J (\theta)'' = \tau - mgl cos (\theta). (An ordinary, 2nd order nonlinear differential...
  2. J

    Filtering Noise in Digital PID Controllers: Exploring the Electrical Components

    When speaking of filtering noise of an input or output, are the texts referring to the actual electrical components of a digital pid controller? Capacitors, resistors etc...
  3. R

    Should I Use PID Regulator for My Control System?

    Hi, I have a very basic conceptual question. I have a system (eg. inverted pendulum) that I want to control. So I need to build a controller. That is clear. If I understand it well, I have minimally two separate options: 1 - use PID regulator/controller 2 - analyze the system, linearize it...
  4. D

    PID Current Control for Laser Diodes

    can we control the pulsed current flowing through a laser diode using PID controller?
  5. P

    PID Controller rise time question

    In optimising the PID controller produced on Simulink, my controller has a step voltage of 100V and I am not sure if the rise time is the point where the response curve first reaches (or crosses)this point, or if it is the point where it hits the first overshoot peak?
  6. C

    Can Lead-lag Controllers be Converted to PID Controllers?

    Homework Statement I'm curently designing a controller, I have calculated the desired controller in terms of phase lead and phase lag, however I'm designing the controller on labview FPGA, which can only cope with a PID controller, I'm just wondering if anyone could help me by pointing me in...
  7. P

    MHB Proving that a ring is non a PID

    Let R=\mathbb{Z}[\sqrt{-13}], let p be a prime in \mathbb{N}, p\neq 2,13. Suppose that p divides an integer of the form a^2+13b^2, with a,b integers and coprime. Let P=(p,a+b\sqrt{-13}) be the ideal generated in R by p and a+b\sqrt{-13} and let \overline{P}=(p,a-b\sqrt{-13}). 1)Prove that...
  8. I_am_learning

    What are the differences between fuzzy logic control and PID control?

    I am trying to begin with fuzzy logic, but this initial question is preventing me from moving any forward. It appears that fuzzy logic control is just an improvement over bang-bang control system. Like instead of doing bang-up , bang-down it does bang-up-hard, bang-up-small bang-down-small etc...
  9. O

    MHB Conditions for integral domain to be a PID

    Let R be an integral domain. Then R is a PID if the following 2 conditions hold: 1) any 2 elements a, b \in R have a greatest common divisor which can be written as ra + sb for some r, s \in R . 2) If a_1, a_2, ... are nonzero elements of R such that a_{i+1}|a_i for all i, then there is...
  10. R

    Designing a PID controller - control systems engineering

    Homework Statement I am given the transfer function Gp (s) = 1/(s+16) and I have to design a controller of the form Gc (s) = K(1 + 1/T*s) (which is a PID controller) To meet the following requirements: Maximum steady state error to a steadily changing desired position = 5% Maximum...
  11. M

    Confused about PID controller for current control with PMW

    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...
  12. T

    Example of PID and its maximal ideal

    I got one example on my notes about PID and maximal ideal. I feel it is a strange example as it doesn't make sense to me, and there are no explanations. It says: For a prime p\in\mathbb{N}, denote by \mathbb{Z}_{(p)} the subring of \mathbb{Q} given by \mathbb{Z}_{(p)}={\frac{m}{n}...
  13. R

    PID Control Doubt: Tuning Proportional, Integral & Derivative Gains

    Hello, I have been obsessed with PID control concept and i want to notice you my doubt here. PID controllers are very useful in industrial applications to make the error free process(learned from the web). Basic PID controller mechanism is to tune the values P(Proportional gain)...
  14. D

    Nonzero R-Module over commuttaive ring, all submodules free => R PID?

    Let R be a commutative ring with 1. If there exists a non-zero R-module M such that every submodule of M is free, then R is a PID. I remember proving something similar to this, assuming submodules of all R-modules are free, but I'm not too sure about this question. The direction I am headed in...
  15. K

    Peltier heat conductance concept question (PID)

    Hey, I am making a cooling system using a peltier junction with a cold finger on one side and a heat sink on the other. For my heat sink, I am depositing the heat into the phase change of a bismuth alloy (about 70 deg C). When the current across the peltier is increased and the hot side...
  16. B

    PID Control Equation in Z-Domain

    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...
  17. K

    1. What does the P in PID control stand for? How does it work?

    1. What does the ”P” in PID control stand for? How does it work? 1. What does the ”P” in PID control stand for? How does it work? 2. What does the ”I” in PID control stand for? How does it work? 3. What does the ”D” in PID control stand for? How does it work? 4. give me 3 examples of...
  18. I

    Solutions of an equation in a PID

    Let R be a Principal Ideal Domain. Let a,b \in R, at least one of which is non-zero. Determine precisely all solutions (s,t), where s,t \in R, of the equation sa+tb= \gcd (a,b). My attempt: since \gcd (a,b) divides both a and b, we can divide both sides by \gcd (a,b) to get the equation s...
  19. S

    PID temp control for distillation (was Before i ask )

    PID temp control for distillation (was "Before i ask") I am 68 years old and never studied physics-- i am not a college student and only completed 1 year of college. I have a hobby of distilling and need questions amswered-- is it ok if i aske questions here about distilling? :smile: Scotty
  20. J

    Finitely generated modules over a PID, and applications on abelian groups

    Hello! I'm currently taking a course in group- and ring theory, and we are now dealing with a chapter on finitely generated modules over PIDs. I have stumbled across some problems that I can't really get my head around. It is one in particular that I would very much like to understand, and I...
  21. M

    Help Needed! Simulating PID Controller in Simulink - Mark's Project

    Hello I'm a student working on a project in temperature control. I have to investigate some of the properties of a standard PID controller. Sadly my project supervisor is not very helpful and I was hoping somebody here could offer me a litte guidance. I would like to simulate my controller in...
  22. B

    Using Relay Feedback to Tune PID Gains

    Homework Statement What is relay feedback? I have to use it to create an automatic tuner for the differential, integral, and proportional gains in a PID control. Homework Equations The Attempt at a Solution
  23. S

    Pid controller for position control in amb simulink help

    hi ! basically i need help in simulink plotting the output can anyone help i have attached the output desireed for my model in pic below below pleasez help me out guys thnx in advance
  24. S

    Preventing Backflow in Nitrogen Stream for PID

    I want to measure certain gases in a nitrogen stream, but I have to dilute with nitrogen flow, which is flowed at a much higher rate for a photo-ionizing detector. However, I am getting backflow into the low flow stream. I tried adding a various mixing chambers of increasing size as the PID...
  25. C

    Obtain transfer function of a system and simulate it with a PID controller

    I want to tune my PID controller. For this I could either do this on-line using the controller on the system, or I could try to obtain the systems' transfer function and then simulate it off-line together with the PID controller to tune it to the desired behavior. I suspect the system is...
  26. E

    Is Z[1/5] a PID? Analysis and Proof

    Homework Statement Determine if Z[1/5] is a PID (Z is the ring of integers). Homework Equations The Attempt at a Solution I'm not sure...I tried showing that it isn't by showing that it is not a UFD but that didn't work out well. Maybe there is some way I can show it is a PID...
  27. S

    Show Maximal Ideal Containment in a PID with ACC

    Homework Statement Show that in a PID, every ideal is contained in a maximal ideal. Hint: Use the Ascending Chain Condition for Ideals Homework Equations Every ideal in a PID is a principal ideal domain. If p is an irreducible element of a PID, then <p> is a maximal ideal. The...
  28. N

    Constructing a Homebrew Lauter Tun with PID Temperature Control

    Hello All, I'm currently upgrading my homebrew equipment, in order to have more control over the whole brewing process. At this point, I use store bought malt extract (sugars extracted from grains) to create the fermentable liquid that becomes beer, but I would like to start brewing with all...
  29. G

    Prove quotient ring of PID is PID too

    Hello everybody, I'm a bit stuck here. I have a problem tha goes like this: Let R be a principal ideal domain (PID). Let D a subset of R which is multiplicatively closed. Show that the ring of quotients D^(-1)R is a PID too. I've tried several different ways but I couldn't get to the...
  30. R

    Help me set up a PID temp controller w/ heating element

    I need to heat styrene to its forming temp of around 325 degrees F. I have a heating gun that operates at too many amps to use safely at home. So I found these temp controllers that don't use a lot of energy, but can get hotter then my blow dryer can, yet not as hot as the 700 degree heat gun I...
  31. M

    MATLAB Buck with pid microcontroller in matlab environment

    please anyone help me with my final year project...esspcially about the modelling of the PID microcontroller ,how to design it...plus how "matlabing"
  32. P

    PID dosen't have to contain 1?

    Not all PIDs have to contain the multiplicative inverse? If that is the case then the principle ideal <a> will not contain 'a' in it. I find that strange. But that is still possible isn't it?
  33. P

    PID Math Problem: Every Element Generating Ideal?

    Homework Statement If R is a PID then all its ideals can be generated by a single element. It dosen't imply that every element in R can generate an ideal does it? The Attempt at a Solution I have to agree that it dosen't but can't think of a proof.
  34. N

    How to design a PID controller for this application?

    I just took over a project for a person that left the company. The project was supposed to be fully documented, but the documentation seems to have come up missing. The application involves using a microcontroller as a PID controller. I will have a desired speed, and the actual speed. I...
  35. T

    Buck,boost and buck-boost with PID controller problem

    Hi! I try to simulate buck,boost and buck-boost converters in Matlab/Simulink with PID controller but I don't know how calculate PID parameters Sad Anybody knows how I calculate this parameters ? Or maybe someone haves buck,boost or buck-boost example circuit in Matlab/Simulink ? Or maybe...
  36. B

    Implementing digital PID control

    I want to control the rpm of a brushless motor with ESC(Electronic speed controller) using PID control. Suppose my motor is rotating at 2000 rpm detecting using hall sensor setup.Now I want it to run at 5000 rpm.The speed will be controlled by PWM signals generated by PWM module( 16-bit i.e...
  37. M

    Design a PID Controller for Pedestrian Road-Crossing Shuttle

    Hey guyz, I am trying to finish off my dissertation and the last bit remaining is to design the actual PID controller for the system at hand.I did it once and I've been told it was wrong so have to re-do it.My knowledge of PID controllers is indeed not worth mentioning so I am...
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