Proportional control, in engineering and process control, is a type of linear feedback control system in which a correction is applied to the controlled variable, and the size of the correction is proportional to the difference between the desired value (setpoint, SP) and the measured value (process variable, PV). Two classic mechanical examples are the toilet bowl float proportioning valve and the fly-ball governor. The proportional control concept is more complex than an on–off control system such as a bi-metallic domestic thermostat, but simpler than a proportional–integral–derivative (PID) control system used in something like an automobile cruise control. On–off control will work where the overall system has a relatively long response time, but can result in instability if the system being controlled has a rapid response time. Proportional control overcomes this by modulating the output to the controlling device, such as a control valve at a level which avoids instability, but applies correction as fast as practicable by applying the optimum quantity of proportional gain. A drawback of proportional control is that it cannot eliminate the residual SP − PV error in processes with compensation e.g. temperature control, as it requires an error to generate a proportional output. To overcome this the PI controller was devised, which uses a proportional term (P) to remove the gross error, and an integral term (I) to eliminate the residual offset error by integrating the error over time to produce an "I" component for the controller output. (Wikipedia).
Any function proportional to a PMF or PDF uniquely determines it. Using proportionality is a extremely useful trick when doing Bayesian inference.
From playlist Machine Learning
Introduction to Weighted Voting
The video provided an introduction to weighted voting. Short hand notation is discusses as well as the definitions of a dictactor, veto power, and dummy players. Site: http://mathispower4u
From playlist Weighted Voting
This video introduced fair division. Site: http://mathispower4u.com
From playlist Fair Division
How to use the LCD to help us solve a rational equation
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we usually cross-multiply the two ratios and then solve for
From playlist How to Solve Rational Equations
Tutorial lesson for solving a rational expression by multiplying by the LCD
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we usually cross-multiply the two ratios and then solve for
From playlist How to Solve Rational Equations
Voting Theory: Plurality Method and Condorcet Criterion
This video explains how to determine the winner of an election using the plurality methods and how to determine the Condorcet winner. Site: http://mathispower4u.com
From playlist Voting Theory
Weighted Voting: Coalitions and Critical Players
This lesson defines and gives examples of coalitions and critical players in a weighted voting system. Site: http://mathispower4u.com
From playlist Weighted Voting
Learn to solve a proportion by determining & multiplying by LCD ex 14,(2x–11)=5(x–3)/11
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we usually cross-multiply the two ratios and then solve for
From playlist How to Solve a Proportion
mod-10 lec-10 Hydraulic Servomechanism and Servo and Proportional Control Valves
Fundamentals of Industrial Oil Hydraulics and Pneumatics by Prof. R.N. Maiti,Department of Mechanical Engineering,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in
From playlist IIT Kharagpur: Fundamentals of Industrial Oil Hydraulics and Pneumatics (CosmoLearning Mechanical Engineering)
Control Bootcamp: Cruise Control Example with Proportional-Integral (PI) control
In this video, we show that introducing integral control reduces the steady-state tracking error to zero in the cruise control example. We also use a more sophisticated model for the automobile. Code available at: faculty.washington.edu/sbrunton/control_bootcamp_code.zip These lecture
From playlist Control Bootcamp
EEVacademy #6 - PID Controllers Explained
David explains PID controllers. First part of a mini-series on control theory. Forum: http://www.eevblog.com/forum/blog/eevacademy-6-pid-controllers-explained/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog throu
From playlist EEVacademy
Excel 2013 Statistical Analysis #71: Inference About Difference Between 2 Pop. Proportions Z Method
Download files (which file shown at begin of video): https://people.highline.edu/mgirvin/AllClasses/210Excel2013/Ch11/Ch11.htm Topics in this video: 1. (00:13) Inference about two population proportions 2. (00:40) Build Confidence Interval for Difference Between 2 Population Proporti
From playlist Excel for Statistical Analysis in Business & Economics Free Course at YouTube (75 Videos)
Excel 2013 Statistical Analysis #70: Sampling Distribution of Pbar1 – Pbar2, Mean & Standard Error
Download files (which file shown at begin of video): https://people.highline.edu/mgirvin/AllClasses/210Excel2013/Ch11/Ch11.htm Topics in this video: 1. (00:13) Introduction to Inference about Difference Between Two Population Proportions 2. (02:35) Reminder from chapter 7 of Proportions 3
From playlist Excel for Statistical Analysis in Business & Economics Free Course at YouTube (75 Videos)
Lect.9F: Hypothesis Test For Two And Several Proportions, Including Example Lecture 9
Lecture with Per B. Brockhoff. Lecture 9. Chapters: 00:00 - Testing Hypotheses Concerning Several Proportions; 02:15 - General Table; 03:45 - Hypotheses Concerning Several Proportions; 05:45 - Calculating The Test Statistic; 07:14 - Example 2 - Continued;
From playlist DTU: Introduction to Statistics | CosmoLearning.org
Bias, derivative action lecture 2019-02-12
Why controllers have bias. Derivative action.
From playlist CPB Theme 1
EE102: Introduction to Signals & Systems, Lecture 22
These lectures are from the EE102, the Stanford course on signals and systems, taught by Stephen Boyd in the spring quarter of 1999. More information is available at https://web.stanford.edu/~boyd/ee102/
From playlist EE102: Introduction to Signals & Systems
What Is PID Control? | Understanding PID Control, Part 1
Chances are you’ve interacted with something that uses a form of this control law, even if you weren’t aware of it. That’s why it is worth learning a bit more about what this control law is, and how it helps. PID is just one form of feedback controller. It is the simplest type of contro
From playlist Understanding PID Control
PID control, demonstration and action (direct or reverse) Lecture 2019-02-06
High level explanation of Proportional and integral action, demo of PI control action on TClab and explanation of direct and reverse acting controllers and controller gain
From playlist CPB Theme 1
Solving a proportion using the cross product ex 7, 8/5 = (4/3x)
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we usually cross-multiply the two ratios and then solve for
From playlist How to Solve a Proportion