Aircraft gas turbine engine vibration diagnostics

Abstract

In the Czech and Slovak aviation are in service elderly aircrafts, usually produced in former Soviet Union. Their power units can be operated in more efficient way, in case of using additional diagnostic methods that allow evaluating their health. Vibration diagnostics is one of the methods indicating changes of rotational machine dynamics. Ground tests of aircraft gas turbine engines allow vibration recording and analysis. Results contribute to airworthiness evaluation and making corrections, if needed. Vibration sensors distribution, signal recording and processing are introduced in a paper. Recorded and re-calculated vibration parameters are used in role of health indicators.

Dynamical Characteristics Of A Head Expander For Vibration Testing In Pustekbang Laboratory

“…Selain untuk mengetahui karakteristik dinamik dari sebuah benda, pengujian getaran juga bisa digunakan untuk mengetahui kekuatan struktur saat dikenai getaran secara kontinyu [2]. Secara tidak langsung, getaran atau noise pada pesawat sangat berpengaruh pada perambatan tekanan dan retakan yang bisa mengakibatkan kerusakan atau kegagalan pada struktur pesawat [3] .Saat ini penelitian dan pengembangan pesawat tanpa awak maupun pesawat penumpang komersil masih terus dilakukan oleh Pusat Teknologi Penerbangan-LAPAN. Salah satu kegiatan pengembangan dan penelitian yang penting dilakukan dalam pengembangan pesawat adalah uji getaran.…”

“…Verifikasi ini dilakukan agar peneliti memiliki gambaran mengenai rentang frekuensi serta batasan-batasan lainya yang bisa dilakukan dengan baik oleh head expnader yang ada di Laboratorium Suhu dan Vibrasi Pustekbang-LAPAN. Pada penelitian kali ini, validasi dilakukan terhadap sifat homogenitas head expander.Menjelaskan kronologis penelitian, meliputi desain penelitian, prosedur penelitian (dalam bentuk algoritma, pseudocode atau lainnya), cara pengujian dan perolehan data [1][2][3]. Uraian jalannya penelitian harus didukung referensi, sehingga penjelasannya dapat diterima secara ilmiah [2,4].…”

A Review of NDT/Structural Health Monitoring Techniques for Hot Gas Components in Gas Turbines

“…Schlagwein et al focused on mistuning effects on blades [95]. In [96,97,98,99,100] it was shown, how condition based maintenance with machine-learning approaches were realised. To detect blade damages with vibrational analysis following papers were published [23,92,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116].…”

Virtual Design of Advanced Control Algorithms for Small Turbojet Engines

“…The table shows that the Naslin adaptive controller performs as the best followed by the neural network adaptive algorithm, nonadaptive and the last is the performance quadratic adaptive controller, although it has also achieved acceptable control quality. To prove the validity of the concept, the triple loop control architecture was employed in laboratory conditions using the iSTC-21v engine [1,35,39]. The simulations are compared to the real data obtained in an experiment as shown in Figure 11, where the Naslin adaptor has been employed in the triple loop control system architecture.…”