Gentlemen, I think the real time response requirements for steering a vehicle on a data collection course would be met sufficiently by almost any laptop. My thoughts drift toward the automotive engine control. Electronic valves, spark timing, fuel injection timing etc... I think this would require much faster response than a path control for an automobile. The current state of engine control seems to be the evolution of the slow, early processors with lookup tables. With EMC2 and the servo thread updating at 1000 times/second I think that would be sufficient. An automotive motor at 6000 rpm is 100 times per second. Almost all of the controlled devices are actuated at 1/2 that rate. This would give you a multiple of 20 for the update rate. An update every 36 degrees of crankshaft rotation and every 18 degrees of (virtual) camshaft rotation at 6000 rpm. The calculations may be simple enough to allow the servo thread to be shortened considerably for an even finer resolution. Some of the new generation diesel motors have no camshaft. The valves are solenoid actuated. Granted, they run at approximately 2000 rpm so the timing requirements of the solenoid cycles are not as severe. Some of the high end automotive gasoline motors do not require a starter motor. They sense where the motor is, inject fuel into the correct cylinder and fire the spark plug to get the motor moving. There is testing with injecting gasoline into a diesel motor under load. They get the best power and mileage with an 85% gas/15% diesel mixture. just sayin/dreamin thanks Stuart
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