To appropriately attenuate vibration generated when rear wheels pass steps even in a scene of traveling on a road with steps at fixed intervals.SOLUTION: A power suspension device includes: electromagnetic actuators 13 arranged side by side in a spring member 7 provided between a spring lower member 1 and a spring upper member 3, and generating driving force related to attenuation action and expansion/contraction action; an information acquisition part 51 for acquiring acceleration information in an expansion/contraction direction of the spring lower member 1 and the spring upper member 3; an attenuation force calculation part 53 for calculating target attenuation force; and a drive control part 57 performing drive control of the electromagnetic actuators 13 using target driving force based on the target attenuation force. The information acquisition part 51 acquires a road surface uneven signal based on acceleration information related to a front wheel side. The attenuation force calculation part 53 calculates target attenuation force related at least to the electromagnetic actuator 13 disposed on a rear wheel side, based on signal components belonging to a vibration attenuation object band on the rear wheel side among the road surface uneven signals based on the acceleration information related to the front wheel side.SELECTED DRAWING: Figure 3
【課題】一定の間隔を置いて段差のある道路を走行中のシーンであっても、後輪が段差を通過する際に生じる振動を適切に減衰する。【解決手段】ばね下部材1及びばね上部材3の間に備わるばね部材7に並設され、減衰動作及び伸縮動作に係る駆動力を発生させる電磁アクチュエータ13と、ばね下部材1及びばね上部材3の伸縮方向の加速度情報を取得する情報取得部51と、目標減衰力を算出する減衰力算出部53と、目標減衰力に基づく目標駆動力を用いて電磁アクチュエータ13の駆動制御を行う駆動制御部57と、を備える。情報取得部51は、前輪側に関する加速度情報に基づく路面凹凸信号を取得する。減衰力算出部53は、前輪側に関する加速度情報に基づく路面凹凸信号のうち、後輪側での振動減衰対象帯域に属する信号成分に基づいて、少なくとも後輪側に設けた電磁アクチュエータ13に係る目標減衰力を算出する。【選択図】図3
POWER SUSPENSION DEVICE
電動サスペンション装置
2021-02-22
Patent
Elektronische Ressource
Japanisch
IPC: | B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge |