{
  "$type": "site.standard.document",
  "description": "A road surface mu is updated with time on the basis of a present value (an estimation value E) of the road surface mu estimated to estimate the road surface mu . In this case, if there is acquired road-surface information in a vehicle travel direction that is detected by a road-side infrastructure…",
  "path": "/patents/1080770",
  "publishedAt": "2005-01-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T8/172",
    "FUJI HEAVY IND LTD [JP]"
  ],
  "textContent": "A road surface mu is updated with time on the basis of a present value (an estimation value E) of the road surface mu estimated to estimate the road surface mu . In this case, if there is acquired road-surface information in a vehicle travel direction that is detected by a road-side infrastructure, a specifying unit (11) specifies a road-surface friction coefficient based on the road-surface information. An estimating unit (12) sets the road surface mu ( mu inf) thus specified as an initial value, resets the present value of the road surface mu to the initial value, and then starts estimation of the road-surface friction coefficient based on this initial value using a dynamic equation of the vehicle. Accordingly, estimation precision of a road-surface friction coefficient is enhanced by using an initial value having high reliability in autonomous estimation of the road-surface friction coefficient.",
  "title": "Road-surface friction coefficient estimating device and road-surface friction coefficient estimating method"
}