Patent ID: 11860590
Assignee: ZHEJIANG UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 7:
8. The model-free optimization method of process parameters of injection molding according to claim 7, characterized in that: during updating for the mth time, correction of the first-order exponential moving average of the corresponding history gradients is ; correction of the second-order exponential moving average of the corresponding history gradients is ; and the correction is respectively calculated by the following Formula:, =
    
      
        v
        
          m
          -
          1
        
      
      
        1
        -
        
          
            (
            
              β
              1
            
            )
          
          
            m
            -
            1
          
        
      
    
  

  
        =
    
      
        s
        
          m
          -
          1
        
      
      
        1
        -
        
          
            (
            
              β
              2
            
            )
          
          
            m
            -
            1
          
        
      
    
  

  
    
      v
      
        m
        -
        1
      
    
    =
    
      
        
          β
          1
        
        ·
        
          v
          
            m
            -
            2
          
        
      
      +
      
        
          (
          
            1
            -
            
              β
              1
            
          
          )
        
        ⁢
        
          ∇
          
            J
            ⁡
            
              (
              
                X
                
                  m
                  -
                  1
                
              
              )
            
          
        
      
    
  

  
    
      s
      
        m
        -
        1
      
    
    =
    
      
        
          β
          2
        
        ·
        
          s
          
            m
            -
            2
          
        
      
      +
      
        
          (
          
            1
            -
            
              β
              2
            
          
          )
        
        ⁢
        
          
            ∇
            
              J
              ⁡
              
                (
                
                  X
                  
                    m
                    -
                    1
                  
                
                )
              
            
          
          ⊙
          
            ∇
            
              J
              ⁡
              
                (
                
                  X
                  
                    m
                    -
                    1
                  
                
                )
              
            
          
        
      
    
  

wherein: m is frequency of updating, vm-1 is an first-order exponential moving average of history gradients during updating for the mth time; v0=0; s0=0; ∇J(Xm-1) is a gradient value obtained after updating for the (m−1)th time; ⊙ denotes element-wise multiplication corresponding to the matrix; β1 is a first-order exponential decay rate coefficient; and β2 is a second-order exponential decay rate coefficient.