Speeding up System Identification Algorithms on a Parallel RISC-V MCU for Fast Near-Sensor Vibration Diagnostic

Structural health monitoring (SHM) systems currently utilize a combination of low-cost, low-energy sensors and processing units to monitor the conditions of target facilities. However, utilizing a dense deployment of sensors generates a significant volume of data that must be transmitted to the cloud, requiring high bandwidth and consuming substantial power, particularly when using wireless protocols. To optimize the energy budget of the monitoring system, it is crucial to reduce the size of the raw data near the sensors at the edge. However, existing compression techniques at the edge suffer from a tradeoff between compression and accuracy and long latency resulting in high energy consumption. This letter addresses these limitations by introducing a parallelized version of an unconventional data reduction method suited for vibration analysis based on system identification models. Our approach leverages the unique capabilities of GAP9, a multicore RISC-V MCU based on the parallel ultra-low-power (PULP) architecture. Compared with the sequential implementation, we achieve a maximum execution time reduction of <inline-formula><tex-math notation="LaTeX">$\approx$</tex-math></inline-formula> <inline-formula><tex-math notation="LaTeX">$60 \,\times$</tex-math></inline-formula> and power consumption of just <inline-formula><tex-math notation="LaTeX">$48.3 \,\mathrm{m}\mathrm{W}$</tex-math></inline-formula> while preserving the spectral accuracy of the models.

• Publication year

  2023

• Venue

  IEEE Sensors Letters

• Publication date

  2023-09-01

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1109/LSENS.2023.3303074
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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