Much More Than 0? How Much Less Than 1?

Isn't this is what was fuzzy logic that was toted to become more similar to human type thinking pattern?

What I would really like to see is 4-state logic:

1- On

2- Transitioning from On to Off

3- Off

4- Transitioning from Off to on

HAT would be a lot more useful than fuzzy logic...

Boolean input is fine where a yes/no decision can be made - for setting flags, interrupts, etc. For the rest, there are bytes, words, integers. All of which take only a few microseconds longer to send. The most important decisions can be made fastest, then the rate required can be sent in the next instruction. eg; what to do:stop, how fast:gradual/instant. By the time the brake is activated, the rest of the information is there - emergency stop can be boolean, too.

Problem with discreet programing by using flags, the conditionals required can get quite involved where the program can get rather lengthy. which cuts into the scan time.

p911

Which is why I would like a quad set- when scanning a couple of hundred sensors, just knowing the "instantaneous" value may limits the information you can glean from the system. I have set up a two-bit schema that gives me what I want, but, for high-speed changes, it takes too long to catch the critical glitches because of the processing required. Of course, one always has the option of adding more computers...computers are cheap these days.

Of course, "speed" is a relative concept. For instance, if all I am doing is controlling an air conditioner, I generally have all the time in the world, since the "comfort zone" is quite broad. If, however, I am trying to, say, steer a boat in rough seas, the quad system would be most helpful...

Guys,

We are talking about multi level systems which have been implemented in communication sytems.

This work has been going on for nearly 30 years, I used to lecture on it but I could not do that today- it is too long ago and much water has passed under the bridge since then!

I am sure that I have a book or two on the topic, if only I can find one of them!

I will rack my brains for references!

Sleepy

Sleepy