Patent ID: 11898453
Assignee: XI'AN JIAOTONG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 3:
4. The method according to claim 3, wherein for the acceleration or deceleration process, displacement data for a displacement sequence number interval near a formant of one displacement of two blade displacements is selected, displacement data for the same displacement sequence number interval of the other blade displacement is selected, and the sampling frequency fs is approximately equal to the average rotational speed,, f
    s
   
   ≈
   
    
     
      n
      p
     
     
      
       N
       2
      
      -
      
       N
       1
      
      +
      1
     
    
    ⁢
    
     
      ∑
      
       i
       =
       
        N
        1
       
      
      
       N
       2
      
     
     
      f
      ri
     
    
   
  
  ,, where np represents the number of the sensors, N1 and N2 respectively represent intercepted data indexes, and fri represents the rotational speed of i-th data at sampling time.