From: ct@ct.com   
      
   Am 08.12.2022 um 17:43 schrieb Heiner Hass:   
   > The equipment, and hence the aircraft, knows where it is all times. It   
   > knows this because it knows where it isn't. By subtracting where it is   
   > from where it isn't (or where is isn't from where it is, depending which   
   > is greater), it obtains a difference or deviation. The internal guidance   
   > system uses deviations to generate corrective commands to fly the   
   > aircraft from a position where it is to a position where it isn't. The   
   > aircraft arrives at the position where it wasn't, thus, the position   
   > where it was is now the position where it isn't. In the event that the   
   > position where it is now, is not the same as the position where it   
   > originally wasn't, the system will acquire a variation (variations are   
   > caused by external factors and discussion of these factors is beyond the   
   > scope of this simple explanation). The variation is the difference   
   > between where the aircraft is and where the aircraft wasn't. If the   
   > variation is considered to be a significant factor, it too may be   
   > corrected by the internal guidance system. The aircraft must now know   
   > where it was. The 'Thought Process' of the equipment is as follows:   
   > because a variation has modified some of the navigation information   
   > which the aircraft acquired, it is not sure where it is. However, it is   
   > sure where it isn't and it knows where it was. It now subtracts where it   
   > should be from where it wasn't (or vice-versa) and by differentiating   
   > this from the algebraic difference between where it shouldn't be and   
   > where it was, it is able to obtain the difference, (called error),   
   > between its deviation and its variation ...   
      
   Ist die Beschreibung einer Regelung, soweit ok.   
   Ein Autopilot ist auch nur ein Regler, viele Regler.   
   Erstmal muß ein brauchbares Signal gewonnen werden, dann kann man   
   vielleicht über regeln nachdenken.   
      
      
   ct   
      
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