topic Re: MBD_freemaster problems in Model-Based Design Toolbox (MBDT)

MBD_freemaster problems

haoxue1027 — Sat, 05 Sep 2020 15:28:47 GMT

Hello

What is the meaning of coefficient a=9.5492965964254 in the demo "PMSM_ClosedLoop_mpc5744p"freemaster?

In addition, Whether to use scalar values uniformly in the MBD demo?

Any help will be appreciated.

Best regards

hao

Re: MBD_freemaster problems

adriantudor — Mon, 07 Sep 2020 14:37:05 GMT

Hi @haoxue1027 ,

This coefficient represents how many rotations per minute is 1 rad/sec. The reason o using it is due to the method of speed measuring using hall sensors ( Speed_and_Position_Estimator block).

Best regards,

Adrian

Re: MBD_freemaster problems

haoxue1027 — Mon, 07 Sep 2020 14:44:02 GMT

Hello,Adrian

Thanks you for replying.

In addition , Is the a=0.005,Execution Time same meaning?

best regards

hao

Re: MBD_freemaster problems

adriantudor — Wed, 09 Sep 2020 17:04:19 GMT

Hi @haoxue1027 ,

This coefficient multiplied with "profile_buffer" variable it represents the time base of the timer used by the Profiler block. I think there is a mistake if you found this coefficient 0.005.

As you can see the Unit of this variable is shown as "usec" microsecond. That means the frequency of the timer used by Profiler is 1/0.000000005 = 200Mhz(so many zeros because of usec Unit).

Best regards,

Adrian

Re: MBD_freemaster problems

haoxue1027 — Thu, 10 Sep 2020 09:07:23 GMT

Hello,Adrian

Thank you very much.

It is helpful for me.

best regards

hao