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55 Threads found on Digital Pid
Hi , or Hi Mr. Peter (tpetar), I have PIC18F45k22 with DAC MCP4922, I need to design a feedback controller for my INverter 12V Dc to out put of max 9v peak AC 50Hz, sinewave, I use LC filters and at the output to make read by PICMICROPIC 18f45k22 at AN2 channel , I use feedback gain of =0.1 and a noninverting level shifter my circuit I a
What is key step to learn it? in analog and digital - - - Updated - - - Most popular - temperature control. I made a soldering station with pid alghorithm. Work perfect for 2 years already. Also, control speed of motor and positioning for linear and rotary drivers. Hello,
hello i am intersted in referrnce and books on building control systems ( closed loop pid , fuzzy , ....) for motors and such in industrial product , and i need some books to RE-UNDERSTAND the theory and practical implementation in "digital" microcontroller regards
The mux scheme doesn't make much sense as shown. A pid or digital filter in general involves internal memory that must be unique for each channel. So if you implement multiplexing, it must act inside the digital filter, too. Apart from this point, you get the digital signal processing latency by counting the pipeline (...)
pid is simply multiplications and additions. In a digital system it's a little more complicated because you need to convert your continuous function to a discrete-time one. There's lots of stuff on the web, I mean LOTS, about how to do this.
Hello master's i have a temperature controller from TAIE manufacturer and model is FU-400-101-00B which having communication facility using RS-485. but to set the temperature and get pid action from this pid controller whaich are commands we need to send to this model. if any one did work on this or such kind of pid controller then plz hel
The equations suggest a general time discrete second order system using the controllable canonical form. But it's not implemented in the code, M1 and M2 aren't calculated. new_duty should be set from controller output uk. Technically, variable types, number ranges and parameter scaling matters. This details can't be seen from your code. P.S.:
Generally speeaking, a "digital" (time-discrete) integrator is an accumulator, adding the input signal at a fixed sample frequency.
Time discrete pid implementation can be done by applying z-transformation, or in other words converting the continuous differential equations to difference equation. You'll find tables of equavalent z-domain pid parameters in any digital control text book, here's the basic concept
Dear Guys I have a very basic question that why we use pid algorithm in digital controller design ? I mean cant we use some alternative approach e.g if i sense output voltage of a dc-dc converter and then accordingly i adjust my PWM. Lets take an example : Suppose Vout of a dc-dc converter is 22V and the desired Vout is 20V, when my control
pls., anyone tell me how to model the digital pid controller for obtaining const.current for operating laser diode
The +3 after the percentage error figure means plus 3 counts. In other words there's an uncertainty of 3 in the last digit of the display. Oh, I just looked at the 15B's specifications on Fluke's web site
The out of integral item will overflow. Only in certain situations. Do you understand when it's the case? Any real integrator has a limit. It should be also implemented in a digital controller, saturation rather than wrap around. There are different methods to implement anti-windup in digital controllers.
While implementing pid controller on FPGA does Ti effect digital implementation? it the loop time.If so what is reset wind up time? 3.Does it determine reset windup value ?
hi all i'm new in microcontrollers field i want some one to tell me about where can i find tutorials about MICROCONTROLLERS BASED pid digital CONTROL USING C PROGRAMMING...thankyou in advance Here are some examples that might be useful to
Can anybody please share / comment what kind of questions are expected related to the following topics? Memories Synthesis digital fundamentals timing Fifo Clock crossing domain Flip flops Latch and ff Thanks for any help
but i need a pid controller which can take any universal input
hello,i am doing a project on digital pid controller using pic16f716.can anyone provide me the code for it.
Discrete? or digital? digital pid have advantage to easy and independently change constant pid. May be integrated in master-slave or multi-levels system. No drift or thermal variation. If sampling frequency is not enough (minim twice fastest component) will be poor performance.
Hello everyone, I am assigned to work on this micro-controller based control of the process. I am given the transfer function and the process variables values. I started on programming using C language, based on the pid values. but i couldn't understand how to implement the process transfer function in micro-controller.