HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comment
Digital_Angel_316@yahoo.com
User Rank
Iron
Re: Part IV: Applications of PLCs & PACs
Digital_Angel_316@yahoo.com   4/1/2012 6:59:35 PM
NO RATINGS
The P.I.D. algorithm question's answer should note that PID filers are or should be made to be 'tunable'.  It comes back to the issues of accuracy and precision (how close to the exact set point do you need to get and stay without oscillation for example).  The startup problem like also 'special cases' is usually also addressed in all PID algorithms.  Choosing a 'P' - proportional setting such as 50% which is halfway between the starting point (first measurement) and desired point (temperature, fill position etc.) implements a sort of 'binary search' to move closer to the set point.  In seeking the set point, now the parameters for 'I' Integral which is a sort of running average, and 'D' Derivative which is the slope or rate of change can be determined.  In addition, prior knowledge of the controllers and sensors and other elements in the control system help to determine values for PID set points.  There are many good tutorials on PID and PID tuning online - enjoy!



Partner Zone
Latest Analysis
Six big automakers will carry the electric vehicle (EV) battery market to a five-fold sales increase by 2020, a new study says.
Take advantage of the properties of plastic to integrate clever features that benefit everyone. Abiding by these guidelines will prepare you for a smooth design cycle.
Determining the quantities and location of sensors in an Internet of Things application requires a thorough problem statement and a clear vision of success, an expert will tell engineers at the upcoming Design & Manufacturing Show in Minneapolis.
2016 engineering grads can expect to earn an average salary of $65,000 right out of the gate. Petroleum engineers' wallets are much fatter, though -- they are expected to earn about $20K more.
3D printing is now adding value to manufacturers at all steps along the business value chain. Come find out how at a talk by John Jaddou at next month's Embedded Systems Conference in Minneapolis.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 8 - 12, Getting Hands On with Arduino Mechatronics
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service