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FJR Motorcycle Forums
FJR Specific Discussion
Gen 3 Cruise control comparison
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<blockquote data-quote="ionbeam" data-source="post: 1192619" data-attributes="member: 277"><p>Boy, it's a mystery how the cruise controls were in synch <img src="https://www.fjrforum.com/forum//public/style_emoticons/default/wink.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> I'm sure I see some elevation change, squint, squint, yup look at it.</p><p></p><p><img src="https://www.americansouthwest.net/nevada/photographs700/nv376-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Cruise controls use a form of a PID error controller (a math equation or circuit) to manage speed. The cruise has to have enough gain to keep up with elevation change or acceleration, enough 'stiffness' to hold a steady speed and enough damping that it won't oscillate (speed vary up an down by a small amount). The idea is to look at set speed and actual speed, then correct any error. By using a high pulse rate like the coil signal it becomes very accurate. The exact values used will be mostly dependent on vehicle power and weight. It sounds like the two bikes were able to do the math with similar accuracy.</p></blockquote><p></p>
[QUOTE="ionbeam, post: 1192619, member: 277"] Boy, it's a mystery how the cruise controls were in synch [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/wink.png[/IMG] I'm sure I see some elevation change, squint, squint, yup look at it. [IMG]https://www.americansouthwest.net/nevada/photographs700/nv376-1.jpg[/IMG] Cruise controls use a form of a PID error controller (a math equation or circuit) to manage speed. The cruise has to have enough gain to keep up with elevation change or acceleration, enough 'stiffness' to hold a steady speed and enough damping that it won't oscillate (speed vary up an down by a small amount). The idea is to look at set speed and actual speed, then correct any error. By using a high pulse rate like the coil signal it becomes very accurate. The exact values used will be mostly dependent on vehicle power and weight. It sounds like the two bikes were able to do the math with similar accuracy. [/QUOTE]
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FJR Motorcycle Forums
FJR Specific Discussion
Gen 3 Cruise control comparison
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