{
  "$type": "site.standard.document",
  "description": "An active suspension system for supporting a mass, such as a seat (12) on a base (16) of a vehicle includes a hydraulic actuator (18) coupled between the seat (12) and the base (16), an pneumatic off-load device (20) between the seat (12) and the base (16), and a control system which actively…",
  "path": "/patents/1105941",
  "publishedAt": "2002-03-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/0152",
    "DEERE & CO [US]"
  ],
  "textContent": "An active suspension system for supporting a mass, such as a seat (12) on a base (16) of a vehicle includes a hydraulic actuator (18) coupled between the seat (12) and the base (16), an pneumatic off-load device (20) between the seat (12) and the base (16), and a control system which actively controls the hydraulic actuator (18) and which controls the off-load member (20). The control system actively controls the hydraulic actuator (18) as a function of a seat position error signal. The control system also controls the off-load member (20) as a function of a signal used in the active control of the actuator (18). A compressor (28) and a vent (30) are coupled to the pneumatic device (20) for controlling pressurization thereof. The control system comprises an electronic control unit (36) which repeatedly executes a control algorithm at a predetermined rate, and which controls the operational status of the compressor (28) and the vent (30) as a function of the position error signal and the predetermined rate.",
  "title": "Active suspension with offload adjustment"
}