ADVANCED PHASOR CONTROL FOR A CORIOLIS MASS FLOW METER (CMFM) |
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| H. Röck, Felix Koschmieder |
- Abstract:
- Advanced control of Coriolis Mass Flow Meters (CMFM) is crucial in situations with multiphase flow and absolutely necessary to prevent the meter from stalling. A high dynamic response of the meter is also of great importance in order to realize advanced features s.a. parameter identification for self-diagnosis or detection of changes in sensitivity and zero. In [4] a cyclic stimulation of the coriolis-mode of the CMFM, representing a virtual mass flow, is presented for generating diagnostic data and marks a major step towards the realization of such features. The presented phasor control scheme for phasors with quasi stationary frequencies reduces the cycle time by a factor of two with respect to [6] and allows to handle situations with multiphase flow. The control performance is much better than reported before but can still be enhanced if the scheme is extended to time-varying frequencies.
In the paper only the drive-mode of the CMFM(single straight pipe) is investigated. The control objective is to stimulate the oscillation system in its a priori unknown eigenfrequency ω01 by phase control and to allow for phase and amplitude control simultaneously. This is different to conventional control schemes where phase and amplitude control have to be separated in time in order to work properly. The control scheme is tested in simulation and realized in an experimental setup of a CMFM. - Keywords:
- phasor control, Coriolis mass flow meter
- Download:
- IMEKO-WC-2009-TC9-402.pdf
- DOI:
- -
- Event details
- Event name:
- XIX IMEKO World Congress
- Title:
Fundamental and Applied Metrology
- Place:
- Lisbon, PORTUGAL
- Time:
- 06 September 2009 - 11 September 2009