Active suspension

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auteoch
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Joined: 23 May 2014, 15:07

Active suspension

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Lotus active suspension?
Last edited by auteoch on 29 Oct 2014, 10:34, edited 1 time in total.

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matt21
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Joined: 15 Mar 2010, 13:17

Re: Active suspension

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Looks like.

BTW Frank Dernie is still holding a patent on the active suspension:

https://www.thomsoninnovation.com/tip-i ... ated=false

DaveW
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Joined: 14 Apr 2009, 12:27

Re: Active suspension

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auteoch wrote:Lotus active suspension?
Active - definitely, Lotus - probably, but it must have been after 1989. My best guess would be the Lotus 107 - one of them, anyway.
matt21 wrote:BTW Frank Dernie is still holding a patent on the active suspension.
That would be for the WGP system, not for the system shown, I think. The Dernie suspension has been described by Scarbs, who obtained his information from Dernie's patent (US 4861066).

MadMatt
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Joined: 08 Jan 2011, 16:04
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Re: Active suspension

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The mechanical side of the active suspension is the easiest part, what is really interesting is the software side of the dampers management, but we won't see anything from Lotus I guess...


tuj
tuj
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Joined: 15 Jun 2007, 15:50

Re: Active suspension

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there is a book on the FW14b that had quite a bit of technical information about how the active suspension worked.

MadMatt
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Re: Active suspension

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tuj wrote:there is a book on the FW14b that had quite a bit of technical information about how the active suspension worked.
Do you have the book's name by any chance? :)

tuj
tuj
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Re: Active suspension

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MadMatt
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Re: Active suspension

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Holy smoke, 530 USD for 128 pages? Can anybody afford this book here? :shock:

DaveW
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Joined: 14 Apr 2009, 12:27

Re: Active suspension

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MadMatt wrote:Can anybody afford this book here?
My guess would be that the book conveys less technical detail about the suspension than Scarbs' article.

tuj
tuj
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Joined: 15 Jun 2007, 15:50

Re: Active suspension

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well one of the thing the books talks about that is not mentioned in the Scarbs article is the limitations and work-around for the microprocessor capacity of the early 90's. And no, I think I paid $20 bucks used for the book, so don't waste your money. But that's the one I'm talking about. The FW14b is my favorite car of F1.

DaveW
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Joined: 14 Apr 2009, 12:27

Re: Active suspension

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tuj wrote:well one of the thing the books talks about that is not mentioned in the Scarbs article is the limitations and work-around for the microprocessor capacity of the early 90's...
That might be true of the WGP system, but it was not a statement of the microprocessor capacity available at the time. Scarbs quotes that the WGP system iterated at 64 per second. Yet in 1984, the Lotus system iterated at 1 millisecond, executing around 2K operations per iteration. The TMS320C20 was available at the time, executing most operations in 200 nanoseconds. By 1987 the TMS320C25 was available with a better architecture and an increased overall capacity....

However, the WGP system clearly worked well.

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BoxStop
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Joined: 20 May 2014, 06:46

Re: Active suspension

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MadMatt wrote:
Holy smoke, 530 USD for 128 pages? Can anybody afford this book here? :shock:
Found it here, but don't if the website works, was looking for a PDF but nothing :/ http://www.andymathews.com/bookstore_williams.php


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