Abstract:
Provided is a damper control device that exerts appropriate damping force to improve ride quality in a vehicle even when the vehicle gets over a projection on a road surface, the damper control device including a correction unit that corrects the damping force of a damper based on information from which a temporal variation amount of a damper velocity of the damper can be grasped and level information from which a damping force characteristic level that is the magnitude of a damping force characteristic of the damper can be grasped. The damper control device can suppress occurrence of distortion in a characteristic of transmission damping force regardless of the magnitude of the damping force characteristic level, and does not cause a lack of the damping force by reducing the damping force more than necessary when the damping force characteristic level is small.
Abstract:
A damper control device includes a vibration level detection unit configured to detect a vibration level of the unsprung member, and a control unit configured to control the damping force characteristics of the damper by obtaining a control instruction, the control instruction determining the damping force characteristics on the basis of the vibration level detected by the vibration level detection unit.
Abstract:
A mono-tube type hydraulic shock absorber includes a cylinder, a free piston that partitions the inside of the cylinder into a liquid chamber in which a hydraulic fluid is filled and a gas chamber in which a gas is filled, a piston slidably inserted into the cylinder, the piston partitioning the liquid chamber into two working chambers, a sealing ring provided on an outer periphery of the free piston, the sealing ring being configured to seal between the cylinder and the free piston, and a lubricating oil enclosed within the gas chamber to lubricate between the sealing ring and the cylinder.
Abstract:
An object is to provide a signal processing device capable of reducing a sudden change in the rate of change of an output signal at the time of switching between two signals. In the signal processing device, when a signal of a larger value is selected, a smoothing signal is generated based on the deviation between two signals such that the smoothing signal has a value larger than the values of the two signals between two points at which the smoothing signal intersects the two signals, or when a signal of a smaller value is selected, the smoothing signal is generated based on the deviation between two signals such that the smoothing signal has a value smaller than the values of the two signals between two points at which the smoothing signal intersects the two signals.
Abstract:
A signal level detection device 1 and a signal level detection method according to a means for solving a problem of the present invention varies a cut-off frequency ωc, of a variable low-pass filter 3 which filters a signal level r. The cut-off frequency ωc is varied based on the signal level r or information referred to for estimating the signal level. The signal level detection device 1 and the signal level detection method therefore reduce a delay of a rise of the obtained signal level r from an actual signal level, and sufficiently remove noise superimposed on the signal level r even when the signal level r is extremely low. Accordingly, control performance improves regardless of a degree of the signal level r.
Abstract:
A signal level detection device includes a signal generation unit configured to generate a plurality of level calculation signals that are out of phase with one another by using an input original signal, and a signal level computation unit configured to obtain the signal level based on the original signal and two or more of the level calculation signals, or based on three or more of the level calculation signals.
Abstract:
A fluid pressure shock absorber includes a piston connected to an end of a piston rod and slidably moving inside a cylinder tube and dividing the cylinder tube into a piston-side chamber and a rod-side chamber, a rod internal space formed inside the piston rod, a first communication passage communicating the rod-side chamber with the rod internal space, a second communication passage formed in the piston and communicating the piston-side chamber with the rod internal space, and a restrictor provided in the second communication passage to apply a resistance to a flow of a working fluid passing through the second communication passage.
Abstract:
There is provided a suspension vibration information estimation device capable of accurately estimating suspension vibration information on a rear wheel side. The suspension vibration information estimation device obtains suspension vibration information on a rear wheel side of a vehicle based on rear wheel unsprung vibration information and rear wheel sprung vibration information, estimates the suspension vibration information in consideration of a vibration state of a vehicle body on the rear wheel side, and thus may accurately estimate the suspension vibration information on the rear wheel side.