Patent ID: 11879656
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 18:
19. A control system for controlling a heat ventilating and air conditioning (HVAC) system, the control system comprising:
a controller that generates and sends an input command to the HVAC system to adjust a temperature to a set point, generating and sending of the input command comprises:
initializing a radial basis function neural network (RBF network), the initialization using a maximum error (emax), a maximum first order change in error (Δemax), a maximum second order change in error (Δ2emax), and a maximum output increment (Δomax), associated with the closed loop system being controlled, wherein the initialization comprises setting center vectors (μ) of the RBF network using the maximum error (emax), the maximum first order change in error (Δemax), and the maximum second order change in error (Δ2emax) as:, μ
   =
   
    [
    
     
      
       
        e
        max
       
      
      
       
        Δ
        ⁢
        
         e
         max
        
       
      
      
       
        
         Δ
         2
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        e
        max
       
      
      
       
        Δ
        ⁢
        
         e
         max
        
       
      
      
       
        
         -
         
          Δ
          2
         
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        e
        max
       
      
      
       
        
         -
         Δ
        
        ⁢
        
         e
         max
        
       
      
      
       
        
         Δ
         2
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        e
        max
       
      
      
       
        
         -
         Δ
        
        ⁢
        
         e
         max
        
       
      
      
       
        
         -
         
          Δ
          2
         
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        -
        
         e
         max
        
       
      
      
       
        Δ
        ⁢
        
         e
         max
        
       
      
      
       
        
         Δ
         2
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        -
        
         e
         max
        
       
      
      
       
        Δ
        ⁢
        
         e
         max
        
       
      
      
       
        
         -
         
          Δ
          2
         
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        -
        
         e
         max
        
       
      
      
       
        
         -
         Δ
        
        ⁢
        
         e
         max
        
       
      
      
       
        
         Δ
         2
        
        ⁢
        
         e
         max
        
       
      
     
     
      
       
        -
        
         e
         max
        
       
      
      
       
        
         -
         Δ
        
        ⁢
        
         e
         max
        
       
      
      
       
        
         -
         
          Δ
          2
         
        
        ⁢
        
         e
         max
        
       
      
     
    
    ]
   
  
  ;
 

replacing a proportional integral differential (PID) control loop with the initialized RBF;
inputting, to the RBF network, input values comprising an error, a first order change in error, and a second order change in error, wherein the initializing further comprises:
initializing an RBF network weight matrix of the RBF network by scaling an initial weight vector (ω′) so that an input vector including the maximum error (emax), the maximum first order change in error (Δemax), and the maximum second order change in error (Δ2emax) multiplied by a predetermined fraction generates a maximum output increment (Δomax);
computing, by the RBF network, control parameters based on the input values;
computing, by the RBF network, an incremental change in the process variable based on the control parameters; and
adjusting an output device to change the process variable by the incremental change.