Continuous-Valued Logic its application in soft controlling

摘要

This paper presents a new concept of continuous-valued logic (Multi level logic) (CVL) which can be applied to control the pulse width of an internally generated PWM in a microcontroller. The input threshold voltage controls duty cycle of generated PWM. The basis of continuous-valued logic (CVL) relies on the unstable generated oscillation of a digital output where the program referred non-Schmitt input, is detecting (0) and (1) values at the stage of Threshold Voltage. Thus, the duty cycle of the respected oscillation defines the position of the input voltage level in the threshold voltage domain, continuously. Each percentage of the duty cycle from 0% up to 100% corresponds to a logic state between 0 and 1. The duty cycle of 50% is considered as logic state "0.5" or "Doing nothing" in Control processes. Defining continuous-valued logic provides extreme logic states. Finally, this concept has applied to a temperature controller. The result is a faster, cheaper and softer controller compare to conventional control techniques.