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System for extensive harmonic analysis of rotating machinery in operation -
The LMS Test.Lab 32 channel Order Analysis system provides a solution for advanced harmonic analysis on rotating equipment in operating conditions. Order sections are obtained from data sampled synchronously with rpm, giving leakage-free, razor-sharp order cuts, while additional online processing is available starting from narrowband fixed frequency sampled waterfall spectra. Raw time data are recorded in parallel for offline processing. The data acquisition is performed using a LMS SCADAS 310 front-end with 2 tacho inputs, supporting 32 channels for ICP® and Voltage signals, including quasi-static parameters.

With the Order Tracking During Signature Acquisition workbook, the user can simultaneously acquire narrowband spectra and synchronously sampled orders during run-ups, run-downs or sequences of both, referenced to multiple physical tacho signals. Derived tacho enables online monitoring of secondary quantities, such as the rotational speed on another axis. With online derived channels, the engineer can add virtual channels by recombining the signals measured on physical channels using both basic and advanced mathematical operations. The multiple sample rates permit the amount of saved data to be reduced by acquiring vibration channels and acoustic channels at different sampling rates. Online reference curves can be used as design targets to validate the current design, or can be applied to check the repeatability of multiple runs.

The time histories for all channels can be validated immediately after the measurement and are directly written to the PC hard disc with a throughput performance that is independent of channel count. The Signature Throughput Processing workbook provides for any processing function needed to gain deeper insight into the physical processes, analysing individual recordings or batches of time histories from multiple measurements.

Features & Benefits

• Simultaneous measurement of leakage-free, synchronously sampled order sections and fixed sampled spectra

• Online monitoring of spectra, waterfalls and colour maps, octave displays and order sections, and a variety of measurement status indicators (ADC levels, rpm readouts, rpm time traces, rpm levels)

• Simultaneous recording of raw time data

• Online check against reference curves

• Maximal data consistency and measurement productivity, providing online high precision order analysis while acquiring narrowband waterfall data and time recordings

• Productive batch processing of throughput data from multiple measurements

• Fast and convenient standard reporting