From: root@none.com   
      
   Hello all   
      
   My company designs and produces advanced technology diesel engines for   
   several markets. We design and build our own common rail fuel injection   
   electronics, from hardware to software.   
      
   We currently use PID control implemented in software. While this works   
   adequately, the number of conditions that I must impose on the inputs   
   and outputs, and the amount of pre and post processing that must be done   
   on them, results in very complex code.   
      
   I had heard that fuzzy logic controls often could produce better results   
   than PID so I started investigating. This is fascinating stuff. From   
   what I presently understand, it does seem as if fuzzy logic controls may   
      work as well as PID in our case.   
      
   I've come here to ask help in pointing me in the correct direction to   
   further my studies. Specifically;   
      
   1. Do, or can, fuzzy logic systems respond well to system lag. In engine   
   control we have the worst case scenario for PID control. That is, a   
   system that has a high response delay and then a non-linear response. In   
   my research I have not seen any examples that are used in these kind of   
   systems. Any opinions about the suitability of fuzzy logic controls for   
   this type of application would be greatly appreciated. I'd love to see   
   some demos or real world apps.   
      
   2. I came across some software called 'Fuzzy Tech'. Any opinions about   
   this software and/or company. I have attempted to contact them on   
   several occasions with no response. Having a commercially available   
   package would be a benefit to me. On the other hand, like anyone else, I   
   don't wish to spend a lot of money before I have some idea as to whether   
   or not it will work.   
      
   Thanks in advance   
      
   Kevin Sweeney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)