Study of the phase characteristics of vibration sensors and conditions of orthogonalization of their measuring basis for the systems of vibration control and vibration testing of materials

To identify the most vibration-sensitive structures of the materials during vibration tests, it is necessary to determine the vibration vector in an orthogonal basis The effectiveness of the tests depends on the accuracy of the vector measurement. The transverse sensitivity of tri-axial vibration transducers, which have found vast application in various vibration measuring and material testing systems, leads to increased measurement errors and limits the frequency range of measurements. The errors can be reduced to almost zero using the proposed method of electronic orthogonalization, which involves rotation of the sensitivity vectors until they coincide with the orthogonal basis, resulting in zero transverse sensitivity. This approach has been successfully developed and works rather well in the low frequency band of the vibration transducer frequency response, wherein the amplitude-characteristics are linear and there is no phase shift in the channels. An emphasis is made on the influence of the phase characteristics of vibration sensors on the formation of orthogonalizing matrices that determine the requirements for an orthogonalizer. The structure of the installation for automated recording amplitude-frequency and phase-frequency responses of the vibration transducer, methodology and results of experimental study of a tri-axial piezoelectric accelerometer (TPA) with one inertia element and oblique-angle measuring basis are presented. The results obtained under vibration activated in three mutually perpendicular directions along the measuring axes show that the transducer measuring system is properly designed to provide for effective broadband orthogonalization of the measuring basis. The results obtained can be used to develop orthogonalizing transducers that eliminate transverse sensitivity in a wide frequency range, as well as to improve the design of sensors and their metrological characteristics.

1. Ganiev R. F. Nonlinear resonances and disasters. Reliability, safety and noiselessness. — Moscow: Regulyarnaya i khaoticheskaya dinamika, 2013 [in Russian].

2. Ganiev R. F., Kovalchuk P. S. Solid and flexible bodies: (Resonances under nonlinear vibration). — Moscow: Mashinostroenie, 1980. — 208 p. [in Russian].

3. Ganiev R. F., Balakshin O. B., Kuharenko B. G. Resonance bifurcation at turbocompressor rotor blade flutter / Dokl. RAN. 2012. Vol. 444. N 1. P. 35 – 37 [in Russian].

4. Astashev V. K., Pichugin K. A., Semenova E. B. Nonlinear dynamics of a vibrating machine with an electrodynamic actuator / Journal of Machinery Manufacture and Reliability. 2021. Vol. 50. N 1. P. 11 – 18 [in Russian]. DOI: 10.31857/S0235711921010065

5. Makhutov N. A., Gadenin M. M. Analysis and control of the strength, useful life, and safe operation risks of power plants with various kinds of energy commodities / Journal of Machinery Manufacture and Reliability. 2022. Vol. 51. N 1. P. 37 – 45 [in Russian].

6. Lepov V. V. The reliability and lifetime of engineering systems in extreme operation conditions / Industr. Lab. Mater. Diagn. 2020. Vol. 86. N 6. P. 36 – 39 [in Russian]. DOI: 10.26896/1028-6861-2020-86-6-36-39

7. Movenko D. A., Morozova L. V., Shurtakov S. V. Study of the character and causes of destruction of the cardan shaft of the propeller engine / Industr. Lab. Mater. Diagn. 2019. Vol. 85. N 12. P. 43 – 50 [in Russian]. DOI: 10.26896/1028-6861-2019-85-12-43-50

8. Pustovoi V. N., Grishin S. A., Duka V. V., Fedosov V. V. Setup for studying the kinetics of crack growth in cyclic ending tests / Industr. Lab. Mater. Diagn. 2020. Vol. 86. N 7. P. 59 – 64 [in Russian]. DOI: 10.26896/1028-6861-2020-86-7-59-64

9. Makhutov N. A., Kossov V. S., Oganyan E. S., et al. Prediction of contact-fatigue damage to rails using computational-experimental methods / Industr. Lab. Mater. Diagn. 2020. Vol. 86. N 4. P. 46 – 55 [in Russian]. DOI: 10.26896/1028-6861-2020-86-4-46-55

10. Cherepantsev A. S., Saltikov V. A. Wide band accelerometer for high-frequency internal Earth noise research / Instruments and Experimental Techniques. 2020. N 1. P. 130 – 135 [in Russian].

11. IEPE Triaxial Accelerometer. Kistler. Product catalogue. https:// kistler.cdn.celum.cloud/SAPCommerce_Download_original/ 000-841e.pdf (accessed 17.05.2023).

12. Test and Measurement Sensor Catalog. Endevco. http://endevco. com/contentStore/MktgContent/Endevco/uploads/2019/08/ EDV-Catalog Lowres.pdf (accessed 17.05.2023).

13. Zhdanov A. S., Morozov K. D. A new technology for improving vibration measurement accuracy with 3D piezoelectric transducers / Proceedings of the 10th International Congress on sound and vibration. — Stockholm, 2003. P. 943 – 950.

14. Zhdanov A. S. Improving 3D vibration measurement accuracy with triaxial transducers by means of electronic sensitivity vectors’ orthogonalization / Vestn. Nauch.-Tekhn. Razvit. 2011. N 5. P. 13 – 19 [in Russian].

15. Zhdanov A. S. Impact of transversal sensitivity on vibration measurement accuracy / Pribory. 2017. N 4(202). P. 1 – 6 [in Russian].

16. Zhdanov A. S. Noise resistant triaxial piezoelectric accelerometer with monolithic piezo-element / Pribory. 2014. N 7(169). P. 1 – 5 [in Russian].

17. Zhdanov A. S. Orthogonalization of the measuring basis of triaxial vibration transducers by the method of successive approximations / Industr. Lab. Mater. Diagn. 2023. Vol. 89. N 4. P. 29 – 37 [in Russian]. DOI: 10.26896/1028-6861-2023-89-4-29-37

18. Zhdanov A. S. Preamplifier-compensator for tri-axial vibration transducers / Pribory. 2015. N 4(178). P. 19 – 24 [in Russian].

19. Piezoelectric transducers DeltaShear, Uni-Gain, DeltaTron and special types. https://kiptm.com/wp-content/uploads/2021/05/ 26/bryul-i-ker-datchik-vibracii-4321-4374-4375.pdf (access 17.05.2023)