GUIDELINES FOR CAUSAL LOOP DIAGRAMS
{"Image DocumentName": "GUIDELINES FOR CAUSAL LOOP DIAGRAMS", "Image ImageDescription": "Mathematics of Loop Polarity. When you determine loop polarity, you are calculating what is known in control theory as the sign of the open loop gain of the loop. The term gain refers to the strength of the signal returned by the loop: - A gain of two means a change in a variable is doubled each cycle around the loop. - A gain of negative 0.5 means the disturbance propagates around the loop to oppose itself with a strength half as large. The term open loop means the gain is calculated for just one feedback cycle. Consider an arbitrary feedback loop consisting of n variables, X1, \u2026 ,Xn. let X1 denote the variable you choose. When you break the loop, X1 splits into an input, X1I and output, X1O. The open loop gain is defined as the (partial) derivative of X1O with respect to X1I.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}