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hi We are trying to implement digital controller on 2181. This is basically a PI controller. Now the problem here is there are coeffients which we r not able to represent in 1.15 format ie the coeff values are much greater than one. There are also certains gains to be provided in digital domain which ranges from 15 to 45. Can you help me or lead me to materials which will help me such that i don't loose the precision which giving these gains or implementing these filters and also will be able to give the exact gain. iqbal 10% cash back on all your calls through 2000 at Lycos Communications at http://comm.lycos.com |
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(No Subject)
Started by ●October 10, 2000
Reply by ●October 11, 20002000-10-11
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thankx ..but with NLS method we won't be able to give the exact gains.. say 2.567. Because we are translating a analog controller to digital the significance of these gains might be imp.. as we will already face problems due to rounding. Can u please elaborate on vscale thankx again waitng for ur reply iqbal On Wed, 11 Oct 2000 12:34:30 Sreejith Pattuvakkaran wrote: >Hi Iqbal, > > For preserving the precesion, you need to vscale(vector scaling) >the input data.i.e. You have to convert the input data(input buffer) >to block floating point format with an nls(no. of left shifts) value. >Basicaly you need to scale all input data with that nls value. >After the computations, you have to compensate the scaling by >right shifting the output data with same scale. > >Does it answer your question?? > >regards, >sreejith > > 10% cash back on all your calls through 2000 at Lycos Communications at http://comm.lycos.com |
