There have been a veritable flurry of posts on the Tesla blog in the last few days, one of which was written by software engineer Drew Baglino. Drew was tasked last year with revamping the traction control system for the Roadster after they made a change from an analog to a digital controller for the motor control. Drew describes the development process he went through over the next several months developing a control algorithm to provide wheel spin up control as well as the equivalent of engine drag torque control (EDTC). The Roadster traction control is all done in the motor control, with no brake intervention.
After developing a first cut of the software, he quickly learned that developing a slip control system goes way beyond the basic theoretical controls. Controls for closed environments like a test track with fixed maneuvers are pretty straightforward. The problem is when you start throwing in transient maneuvers and surface transitions. All of a sudden the problem becomes much more complex as Drew found when other people started driving his traction control on the road. I can definitely sympathize with Drew on this project after working as a controls and software engineer on abs/tcs and stability control systems for 17 years before quitting a few months ago. Head over to the Tesla Blog to read all about Drew's big adventure and don't forget to check out the videos after the jump.
[Source: Tesla Motors]
Traction Control on - Pavement
Traction Control off - Pavement
Traction Control on - Dirt
Traction Control off - Dirt
After developing a first cut of the software, he quickly learned that developing a slip control system goes way beyond the basic theoretical controls. Controls for closed environments like a test track with fixed maneuvers are pretty straightforward. The problem is when you start throwing in transient maneuvers and surface transitions. All of a sudden the problem becomes much more complex as Drew found when other people started driving his traction control on the road. I can definitely sympathize with Drew on this project after working as a controls and software engineer on abs/tcs and stability control systems for 17 years before quitting a few months ago. Head over to the Tesla Blog to read all about Drew's big adventure and don't forget to check out the videos after the jump.
[Source: Tesla Motors]
The video meant to be presented here is no longer available. Sorry for the inconvenience.
Traction Control on - Pavement
The video meant to be presented here is no longer available. Sorry for the inconvenience.
Traction Control off - Pavement
The video meant to be presented here is no longer available. Sorry for the inconvenience.
Traction Control on - Dirt
The video meant to be presented here is no longer available. Sorry for the inconvenience.
Traction Control off - Dirt
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