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Two functions: one which waits for a certain PID to terminate (with optional timeout), another one which checks whether a process with a given PID is running.

This was extracted from psutil project which also provides a Windows implementation.

Timeout functionality is implemented as a busy loop and it was inspired by

Context manager for a pid (process id) file used to tell whether a daemon process is still running.

On entry, it writes the pid of the current process to the path. On exit, it removes the file.

Designed to work with...

The recipe gives simple implementation of a Discrete Proportional-Integral-Derivative (PID) controller. PID controller gives output value for error between desired reference input and measurement feedback to minimize error value.

Most of the time we use Simulink to simulate a PID controller. But this files run it as a Matlab code.
Extract the files to the working directory and just run the file PID_ctrl_call.m.
You can vary the PID tuning parameters in the file...

This simulation illustrates the effects of the fixed-point
computations on the closed-loop precision for a 16-bits PID controller.
The rounding mode, the point where the truncations take place and the
format width for the internal...

Digital version of Fractional-Order PID Controller (DFOC) of the form:
C(s) = K + Ti/s^m + Td*s^d for given sampling period Ts [sec].

For more details and help write:
>> help DFOC

PID controller has been extensively used in the industrial world. But in this controller it is difficult to tune the PID gains.

We apply the genetic algorithm(GA) to tune the PID gains. The GA is agorithm using the biotic; gene the...

This is the demo file for MathWorks webinar "PID Control Made Easy" from September 201-

The demo shows design and tuning of PID controllers in MATLAB and Simulink.

PID Controller is used to control engine speed.

This block implements the PID control equations found on page 1680 of the Foxboro I/A Series Integrated Control Block Descriptions Manual Volume 3, dated May 31 2006. Use this block when the target platform for a PID control design is a Foxboro...

This is the demo file for video demo:

and "Seth on Simulink" blog post "PID Control Made Easy":


ANTI WIND UP is a simple Matlab Simulink file that allows user to analyze the behavior of 2 digital pid implementations. You can focus on command and process output when the actuator is saturated. You will see that the basic PID exibits an...

DC motor Control using lag compensation and PID
To customize this code you just need to:
1- Change the values of DC motor constants
2- Determine settling time, PO% and SSE and Change the zeros of lag compensation
3- Tune the...

This is the demo file for September 2009 MathWorks webinar "PID Control Made Easy":

and November 2009 MATLAB Digest article "PID Control Design Made...

Most PID tuning rules are based on first-order plus time delay assumption of the plant hence cannot ensure the best control performance. Using mordern optimization techniques, it is possible to tune a PID controller based on the actual transfer...

The effect of fixed-point arithmetic in 16-bits PID controller C routines
on the closed-loop precision is shown in this Simulink model.

Two Simulink blocks that implement single and double
precision 16-bits PID C routines are...

This technique is used in many control application and here i used it to tune the PID controller

This model shows a simulation of how temperature is controlled with the use of a PID (proportional-integral-derivative) controller.

The proportional, integral and differential terms of PID control are modified by simple nonlinear terms, depending on the error.
That makes the control faster, more precise and more robust.
This was tested and proven at the control lab...

The PID controller is the most widely used controller in industrial systems. However, appropriately tuning a PID controller is not an easy task although it has only three parameters at most.

This submission provides a tool for beginners...

PID is used in several purpose for controlling of motors and valves etc..., no development was in the field of state space model w r t PID controller design .... hope this suits the requirement