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
Today's robots should be respected, and humans should be wary of their growing skills and sophistication. Quite simply, robots are better than us in a lot of ways. Here are 10 of them.
3D printing has met up with drones in a 3D-printed UAV. University of Sheffield engineers printed the prototype drone in 24 hours from ABS plastic using Fused Deposition Modeling.
Product design is changing with advances in technology and outsourced manufacturing. The Art of Product Design spells out the future of design engineering.
AMD is set to launch the industry's first 16 GB workstation graphics card -- the W9100.
Samsung's 5th-generation Android-based Galaxy smartphone includes a fingerprint scanner, updated camera and display, and water/dust resistance.
More:Blogs|News
Design News Webinar Series
3/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
2/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
12/18/2013 Available On Demand
11/20/2013 Available On Demand
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Apr 21 - 25, Creating & Testing Your First RTOS Application Using MQX
SEMESTERS: 1  |  2  |  3  |  4  |  5


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.
Next Class: April 29 - Day 1
Sponsored by maxon precision motors
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service