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Heater controlling unit using a fuzzy neural network

  • US 5,683,605 A
  • Filed: 12/14/1995
  • Issued: 11/04/1997
  • Est. Priority Date: 12/27/1994
  • Status: Expired due to Term
First Claim
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1. A heater controlling unit for controlling an on/off action of a heater to control a surface temperature of heat releasing means which releases heat generated by said heater through conduction, said heater controlling unit comprising:

  • temperature detecting means for detecting an actual temperature of a surface of said heat releasing means;

    temperature change rate computing means for computing a temperature change rate within a predetermined period using the actual temperature detected by said temperature detecting means; and

    on-time computing and control means including a fuzzy neural network, said fuzzy neural network receiving the actual temperature detected by said temperature detecting means and the temperature change rate computed by said temperature change rate computing means and computing a period of time during which said heater is turned on using a fuzzy logic to output a computed value, said on-time computing and control means controlling said on/off action based on the output computed value from said fuzzy neural network,said fuzzy neural network including a plurality of layers each having a node for outputting an output signal in response to an input signal, and a plurality of links that interlink the node of said each layer to transmit a signal among layers,a weight of said each link, which indicates signal transmission efficiency among the nodes, being adjusted based on a difference between a target value and the output computed value from said fuzzy neural network.

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