Referring to the NASA document Design and Development of the Blackbird: Challenges and Lessons Learned.
On page 31, there's a mention of dual-mode adaptive landing gear, which is quoted below.
Lockheed engineers designed a dual-mode adaptive landing gear system for the YF-12A. The configuration included a strut with an optimized air load-stroke curve during landing, and an automatic switch-over system to allow for a flatter air load-stroke curve during taxi. The study demonstrated the effectiveness of a dual-mode adaptive landing gear system in reducing the dynamic response of an airplane during taxi. It also provided a database to aid in determining the degree of correlation between analytically predicted responses and actual test results with a full-scale YF-12A.63
From what I could understand, it seems it's focus was to give the landing gear loading a smoother curve and reduce the dynamic loading during taxiing, in simpler terms, dampen the minor vibrations while taxiing.
How is this type of landing gear different from the basic oleo shock struts employed today, if at all there's any difference. I mean, it pretty much does the same thing. Is there any construction difference?
An image reference would very much be appreciated.