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Corvette
C8 Forum
Mag Ride vs. No Mag Ride
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<blockquote data-quote="slegros" data-source="post: 328065" data-attributes="member: 8479"><p>Not stuff I keep on file.. LOL! Those links were from a quick google search.</p><p></p><p>Chassis acceleration and wheel acceleration in the vertical axis are basically what you are looking to control with suspension. This is the basic concept of shake rigs, to subject each wheel to oscillating vertical loads of varying frequencies to fine tune damper force velocity curves. In the development process the sensors in MR system basically give the engineers/MR controller this data in real time on the road, and I have a suspicion the damper curves selected for the non MR shocks were probably arrived at in part based on data taken from the MR systems in testing. With MR its closed loop. In theory you could also have infinite fixed damper profiles with MR to select from, but that would only be using a fraction of the power of the system when you can close the loop and have the suspension continuously adjusting on the fly to produce the desired result. </p><p></p><p>The algorithms/programs are proprietary, you'll find stuff on the basic concepts but very few specifics of the implementation. Jim Mero did a lot of the development for GM and specifically the Corvette MR systems up to and including the C7. Have a look for some of his interviews/articles where he talks about "rebuilding" the MR programming I think around the time of the C7 to base it on something new (All based on skyhook? a hybrid? He doesn't say), and how he made that available through his upgrades for older Corvettes. The programming while likely based on skyhook also has many other variables that can be tuned. Jim doesn't go into specifics about his/GM/BWIs secret sauce. As with any suspension system to an extent it only as good as its tuning (though MR has many technical advantages not present with passive systems), but in the case of the Corvette Jim Mero in my opinion is a VERY smart guy and the GM/BWI vehicle dynamics engineers really know what they are doing with MR at this point to where it has progressed beyond what can be achieved with passive dampers. It seems MR is definitely the point of focus as far as Corvette suspension at this point.</p><p></p><p>This is a good interview with Jim Mero. He discusses MR, but there may be other interviews out there with more on MR programming theory:</p><p></p><p>[MEDIA=youtube]paH14cBU0oM[/MEDIA]</p></blockquote><p></p>
[QUOTE="slegros, post: 328065, member: 8479"] Not stuff I keep on file.. LOL! Those links were from a quick google search. Chassis acceleration and wheel acceleration in the vertical axis are basically what you are looking to control with suspension. This is the basic concept of shake rigs, to subject each wheel to oscillating vertical loads of varying frequencies to fine tune damper force velocity curves. In the development process the sensors in MR system basically give the engineers/MR controller this data in real time on the road, and I have a suspicion the damper curves selected for the non MR shocks were probably arrived at in part based on data taken from the MR systems in testing. With MR its closed loop. In theory you could also have infinite fixed damper profiles with MR to select from, but that would only be using a fraction of the power of the system when you can close the loop and have the suspension continuously adjusting on the fly to produce the desired result. The algorithms/programs are proprietary, you'll find stuff on the basic concepts but very few specifics of the implementation. Jim Mero did a lot of the development for GM and specifically the Corvette MR systems up to and including the C7. Have a look for some of his interviews/articles where he talks about "rebuilding" the MR programming I think around the time of the C7 to base it on something new (All based on skyhook? a hybrid? He doesn't say), and how he made that available through his upgrades for older Corvettes. The programming while likely based on skyhook also has many other variables that can be tuned. Jim doesn't go into specifics about his/GM/BWIs secret sauce. As with any suspension system to an extent it only as good as its tuning (though MR has many technical advantages not present with passive systems), but in the case of the Corvette Jim Mero in my opinion is a VERY smart guy and the GM/BWI vehicle dynamics engineers really know what they are doing with MR at this point to where it has progressed beyond what can be achieved with passive dampers. It seems MR is definitely the point of focus as far as Corvette suspension at this point. This is a good interview with Jim Mero. He discusses MR, but there may be other interviews out there with more on MR programming theory: [MEDIA=youtube]paH14cBU0oM[/MEDIA] [/QUOTE]
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Mag Ride vs. No Mag Ride
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