{
  "$type": "site.standard.document",
  "description": "A change of performance of an electromagnetic suspension unit is detected. When an integral £| Vs'-Vs* | of an absolute value of a difference between an actual value Vs* and an estimated value Vs' of an expansion/contraction velocity of a shock absorber is larger than a performance change threshold…",
  "path": "/patents/1009567",
  "publishedAt": "2011-09-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/015",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A change of performance of an electromagnetic suspension unit is detected. When an integral £| Vs'-Vs* | of an absolute value of a difference between an actual value Vs* and an estimated value Vs' of an expansion/contraction velocity of a shock absorber is larger than a performance change threshold value Sth, it is detected that the performance of the electromagnetic suspension unit is changed (S16). Further, when an integral £ | Vs* | of an absolute value of the actual value Vs* is larger than an integral £ | Vs' | of an absolute value of the estimated value Vs' by a predetermined value, performance of the shock absorber is changed such that a damping force of the shock absorber is reduced (S22, S23). Thus, the performance change of the electromagnetic suspension unit is detected based on the expansion/contraction velocity of the shock absorber.",
  "title": "ELECTROMAGNETIC SUSPENSION SYSTEM"
}