RELAY ARMATURE REBOUND ANALYSIS 



183 



for the latter case is that P^f > 



(1 - il/12) 



k — 1 . It should be noted that 



while the first rebound maximum, shown in solid lines on Figs. 5 to 10, 

 is always realized, the later rebound given by (29) is an upper limit — 

 shown in dashed lines — and is not always realized. In the dashed re- 

 gions, phasing is extremely critical ^nd small variations in the param- 

 eters may cause large variations in maximum rebound. From an 

 engineering standpoint these regions are essentially undesirable. 

 Region II — Partial initial front series for 



This region is one of critical phasing, and attention is limited to 

 special cases leading to maximum rebound. These cases occur when a 



> 

 u 

 fvjo.22 



§0.20 



-I 

 Q. 

 2 0.18 



0.16 



< 0.08 



_i 



LU 



a 

 0.06 



0.04 



0.02 

 



5 



Pia^ 



Fig. 6 — Relative maximum rebound amplitude for M12 = 1/3. 



