Close loop control system and method of the same

Abstract

A close loop control system includes a controlled system having a controlled variable and a control variable, a first detecting unit, a second detecting unit, and a feedback control unit. The first and the second detecting units detect the controlled system to output a first and a second feedback values corresponding to the control variable. The feedback control unit controls the controlled system according to the differential value of the first or the second feedback value and a predetermined value to stabilize the controlled variable to the predetermined value. The absolute differential value of the first and the second feedback values determines if detecting units are regular. When the absolute differential value is smaller than an error value, the controlled variable is controlled according to the first feedback value. When the absolute differential value is not smaller than the error value, the controlled variable is fixed to a fixed value.

1 . A damage free system, comprising:
 a processing unit controlled by an inputting signal and outputting an outputting signal;   a detecting unit for detecting the outputting signal of the processing unit and respectively outputting a plurality of feedback values; and   an adjusting unit controlled by a difference of one feedback value and another feedback value, wherein when the difference is larger than a predetermined value, the adjusting unit inputs an averaged signal as the inputting signal to the processing unit.   
   
   
       2 . The system according to  claim 1 , wherein the detecting unit comprises a first detecting unit and a second detecting unit for detecting the outputting signal of the processing unit and respectively outputs a first feedback value and a second feedback value. 
   
   
       3 . The system according to  claim 1 , wherein when the difference is smaller than the predetermined value, the adjusting unit inputs an adjusting signal as the inputting signal to the processing unit. 
   
   
       4 . The system according to  claim 1 , wherein the adjusting unit and the detecting unit form a feedback close loop. 
   
   
       5 . The system according to  claim 1 , wherein the averaged signal is determined by a plurality of outputting signals outputted by the processing unit. 
   
   
       6 . The system according to  claim 1 , wherein the averaged signal is stored in a register. 
   
   
       7 . A damage free method, comprising:
 obtaining a plurality of feedback values by detecting an outputting signal from a processing unit;   obtaining a difference of one feedback value and another feedback value; and   inputting an averaged signal as an inputting signal to the processing unit if the difference is larger than a predetermined value.   
   
   
       8 . The method according to  claim 7 , further comprising respectively obtaining a first feedback value and a second feedback value by a first detecting unit and a second detecting unit. 
   
   
       9 . The method according to  claim 7 , further comprising inputting an adjusting signal as the inputting signal to the processing unit if the difference is smaller than the predetermined value. 
   
   
       10 . The method according to  claim 7 , further comprising feeding the outputting signal to the inputting signal by a feedback close loop. 
   
   
       11 . The method according to  claim 7 , wherein the averaged signal is determined by a plurality of outputting signals outputted by the processing unit. 
   
   
       12 . The method according to  claim 7 , wherein the averaged signal is stored in a register.