Patent ID: 11897635
Assignee: SPACE ENGINEERING UNIVERSITY
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 6:
7. The method for maintaining Walker constellation formation according to claim 5, wherein the step of determining the relational expression of the first relative drift amount varying over time within the simulation time period further comprises:
the relational expression of the first relative drift amount varying over time within the simulation time period is a second formula, which is written as:, {
  
   
    
     
      
       
        Δ
        ⁢
        
         Ω
         ⁡
         (
         t
         )
        
       
       =
       
        
         Δ
         ⁢
         
          Ω
          0
         
        
        +
        
         
          k
          Ω
          ′
         
         ⁢
         t
        
        +
        
         
          k
          1
          Ω
         
         ⁢
         t
        
        +
        
         
          0
          .
          5
         
         ⁢
         
          k
          2
          Ω
         
         ⁢
         
          t
          2
         
        
       
      
     
    
    
     
      
       
        Δ
        ⁢
        
         λ
         ⁡
         (
         t
         )
        
       
       =
       
        
         Δλ
         0
        
        +
        
         
          k
          λ
          ′
         
         ⁢
         t
        
        +
        
         
          k
          1
          λ
         
         ⁢
         t
        
        +
        
         
          0
          .
          5
         
         ⁢
         
          k
          2
          λ
         
         ⁢
         
          t
          2
         
        
       
      
     
    
   
   ,
  
 

where ΔΩ(t) represents a right ascension of ascending node as a function of time, Δλ(t) represents an along-track angle as a function of time, ΔΩ0 is an initial value of relative drift of the right ascension of ascending node, Δλ0 is an initial value of relative drift of the along-track angle, kΩ′ is a first-order variation rate generated by an initial offset amount of the right ascension of ascending node, kλ′ is a first-order variation rate generated by an initial offset amount of the along-track angle, k1Ω is a first-order variation rate of the relative drift of the right ascension of ascending node, k1λ is a first-order variation rate of the relative drift of the along-track angle, k2Ω is a variation acceleration of the relative drift of the right ascension of ascending node, and k2λ is a variation acceleration of the relative drift of the along-track angle.