Reliability enhancement of event timer calibration by using a dual PLL for the calibrating signal generation

Author(s):  
V. Vedin ◽  
A. Mezerinsh
1983 ◽  
Vol 44 (C6) ◽  
pp. C6-27-C6-34 ◽  
Author(s):  
B. K. Bein ◽  
J. Pelzl

Author(s):  
Shotaro Agatsuma ◽  
Shin Takahashi ◽  
Satoshi Saga
Keyword(s):  

2020 ◽  
pp. 491-495
Author(s):  
A.M. Tomashevich ◽  
G.G. Shirvan’yants ◽  
D.A. Teryaev

The possibility of life and reliability enhancing of AL-31F low pressure turbine disc’s fir-tree slots by ultrasonic hardening is considered. Having disc’s material properties studied, working stress derivation is executed which was further used for following comparative fatigue tests. Also, Davidenkov method residual stress analysis is carried out which showed 95.3 % change to compression stress for circumferential residual stress and 80.9 % change to compression stress for axial residual stress which proves possibility of fir-tree slots’ life and reliability enhancement by ultrasonic hardening. Comparative fatigue tests with N = 4•10 5 cycles basis showed that the hardened samples standing out the cycle basis during higher oscillatory amplitudes (and, thus, affecting loads) than the non-hardened basic ones.


Author(s):  
M. I. Bulgakova ◽  
◽  
D. A. Gulyaikin ◽  
A. A. Brechko ◽  
◽  
...  
Keyword(s):  

1973 ◽  
Vol 19 (13) ◽  
pp. 278
Author(s):  
D.C. Ayre

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