In this short example, PMX is used for analyzing power P[W], rotational speed n [1/s] and acceleration [1/s²], in addition to torque M [Nm] and the corresponding CASMA filter. The calculated channels as shown in the screenshot below have been created for this purpose. The signals are displayed in catman.
Calculations:
Power:
Angular speed:
Angular acceleration:
Important: For all calculations the rotation speed n has to be converted from revolutions per minute to revolutions per second, i.e. divided by 60.
Channels
Please see below for all channels displayed graphically in catman. The colors in brackets refer to the colors of the curves. The signals consist of the following channels:
Torque M (red):
- Directly from the measurement channel of the PX460
CASMA filter (green):
- Already explained in detail
Power P (yellow):
- Divider (rotational speed n / 60), revolutions per second
- Constant signal (2*pi)
- Multiplier (M * n [1/s] * 2*pi]
Rotational speed n (orange):
- Directly from the measurement channel of the PX460
Angular acceleration (blue):
- Multiplier (2*pi * n [1/s]), results in the angular speed w
- Differentiator (w)