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1/3/2014 10:16 AM | |
Joined: 10/11/2006 Last visit: 9/18/2024 Posts: 5906 Rating: (804) |
Dear Girish Mandya, you can find a lot of helpful information and graphical representations in the web: http://en.wikipedia.org/wiki/PID_controller or http://www.google.de/imgres?sa=X&biw=1843&bih=958&tbm=isch&tbnid=IoZD3kF8eZVYsM:&imgrefurl=http://radhesh.wordpress.com/2008/05/11/pid-controller-simplified/&docid=1PuFbr8T4oMNBM&imgurl=http://radhesh.files.wordpress.com/2008/05/pid.jpg&w=1604&h=738&ei=UXfGUpjdBMmCtAbW9oDADA&zoom=1&iact=hc&vpx=356&vpy=123&dur=973&hovh=152&hovw=331&tx=164&ty=108&page=1&tbnh=128&tbnw=278&start=0&ndsp=45&ved=1t:429,r:2,s:0,i:89 In general a PID controller works on three parameters which are acting in sum using the loop error: -proportional gain Kp -integral time Ti -derivative time Td In order to keep things easy one can say: Increasing Kp will reduce the steady state error. Kp reduces rise time. Ti eliminates the steady state error. Ti reduces rise time as well. If you enlarge this values too much you suffer overshoots. The derivative action interprets the change and slope of error changes.Td is giving the time you like to look into the future and try to estimate how the systemis going tobehave. Td may improvethe response of the system but it is a little bit tricky and PI control is mostly sufficient. |
With best regards, |
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1/3/2014 12:40 PM | |
Posts: 8 Rating: (0) |
Thank you so much for your inputs |
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