Abstract: The suspension device for vehicles includes: an electric damper which operates by electricity; a fluid pressure damper which operates by hydraulic pressure; a road-surface state detector which detects a road-surface state ahead of a tire of a vehicle; and a controller which causes at least one to operate among the electric damper and the fluid pressure damper, based on a detection result of the road-surface state detector.

Abstract: A preview road surface detector capable of discontinuing predictive control is provided, which suppresses the energy consumption required to determine whether predictive control should be discontinued. The preview road surface detector includes: a distance sensor provided on a vehicle body member, the distance sensor detecting a value related to a distance between the vehicle body member and a measurement point on a road surface ahead of a vehicle, the measurement point corresponding to at least part of a road surface contact portion of a wheel; and a distance calculator that calculates a road surface distance as the distance from the vehicle body member to the measurement point, based on a detection value detected by the distance sensor, in which the distance sensor is deactivated under a predetermined condition.

Abstract: The vehicular state estimation apparatus includes: a physical quantity detector configured to detect a physical quantity indicating behavior by the vehicle; a vehicle behavior estimator configured to estimate current behavior by the vehicle; a distance sensor that is configured to detect a value pertaining to a distance between the vehicle body member and a measurement point on a road surface in front of the vehicle and corresponding to at least a central section of a road surface contact section on a wheel; a distance calculator configured to calculate a road surface distance; a spring constant calculator configured to calculate at least one of spring constants, in a vehicle stopped state; and a suspension controller configured to control operation of the active suspension apparatus based on the spring constants, the road surface distance, and vehicle behavior information.

Abstract: A preview road surface detector is provided, which is capable of suppressing the crosstalk of received detection waves. A preview road surface detector, including: a distance sensor including a plurality of transmitters and at least one receiver installed on a vehicle body member and arranged in a direction intersecting a travel direction of a vehicle, the distance sensor detecting a value related to a distance between the vehicle body member and a measurement point on a road surface ahead of a vehicle, the measurement point corresponding to at least part of a road surface contact portion of a wheel; and a distance calculator that calculates a road surface distance as the distance from the vehicle body member to the measurement point, based on a detection value detected by the distance sensor, in which the transmitters transmit detection waves with a time difference between the adjacent transmitters.

Abstract: An electrically powered suspension system includes: an actuator that is provided between a vehicle body and a wheel of a vehicle and generates a load for damping vibration of the vehicle body; an information acquisition part that acquires information on a sprung state amount and a road surface state; a target load calculation part that calculates a first target load related to skyhook control based on the sprung state amount and calculates a second target load related to preview control based on the road surface state; and a load control part. The target load calculation part calculates a third target load related to roll generation control based on a target roll angle and calculates a combined target load into which the first target load, second target load, and third target load have been combined. The load control part performs load control of the actuator using the combined target load.

Abstract: An electrically powered suspension system performs an accurate vibration damping of a vehicle with low power consumption even if a linear motor of an electromagnetic actuator strokes to reach an irregular region and includes an electromagnetic actuator generating a driving force for the vibration damping. A linear motor of the actuator includes a cylindrical rod member provided with a plurality of on-rod armature coils along its axis and a housing surrounding the rod member, mounted movable back and forth along the axis with respect to the rod member, and provided with a plurality of permanent magnets along the axis. The on-rod armature coils located on ends of the rod member are provided with short-circuit parts b suppressing the rod member and the housing from moving back and forth with respect to each other.

Abstract: A suspension device includes: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; and an electric damper configured to electrically displace the rod by an actuator. The electric damper includes: an outer cylinder; an inner cylinder; a piston provided on the rod and configured to stroke in the inner cylinder; and a communication passage disposed inside the inner cylinder at a central portion where the piston strokes. The communication passage establishes communication between the first liquid chamber at one axial end side of the piston and the second liquid chamber at another axial end side of the piston.

Abstract: A network device includes a media gateway to receive and process a voice over digital subscriber line (VoDSL) communication to generate voice data in a predetermined format; a terminating unit to receive another type of voice communication and output voice data in the predetermined format; and a control unit to receive the generated voice data from the media gateway and the outputted voice data from the terminating unit, where the network device exchanges at least one of the VoDSL communication to the other type of voice communication or the other type of voice communication to the VoDSL communication.

Abstract: A network device includes a media gateway to receive and process a voice over digital subscriber line (VoDSL) communication to generate voice data in a predetermined format; a terminating unit to receive another type of voice communication and output voice data in the predetermined format; and a control unit to receive the generated voice data from the media gateway and the outputted voice data from the terminating unit, where the network device exchanges at least one of the VoDSL communication to the other type of voice communication or the other type of voice communication to the VoDSL communication.

Abstract: A network device includes a media gateway to receive and process a voice over digital subscriber line (VoDSL) communication to generate voice data in a predetermined format; a terminating unit to receive another type of voice communication and output voice data in the predetermined format; and a control unit to receive the generated voice data from the media gateway and the outputted voice data from the terminating unit, where the network device exchanges at least one of the VoDSL communication to the other type of voice communication or the other type of voice communication to the VoDSL communication.

Abstract: A DSL 5 is connected between an exchange device 3 and an IAD1 to which DSL subscriber terminals 2-1 through 2-n are connected, and the exchange device 3 is equipped with a VMG 4 for terminating an ATM cell multiplexed over the DSL 5, a voice packet transmitted as multiplexed over the DSL 5 is directly terminated at the exchange device 3, which in turn converts the voice packet into a packet according to an existing exchange device interface 8, so that DSL subscribers can be accommodated in the exchange device 3 directly and also exchange device software for operating the exchange device 3 can control call processing without knowing about a device under the control of a subscriber control unit, as a result, user burdens can be mitigated. The invention may be embodied in other specific forms without departing from the spirit or essential characteristic thereof.

Abstract: A DSL 5 is connected between an exchange device 3 and an IAD1 to which DSL subscriber terminals 2-1 through 2-n are connected, and the exchange device 3 is equipped with a VMG 4 for terminating an ATM cell multiplexed over the DSL 5, a voice packet transmitted as multiplexed over the DSL 5 is directly terminated at the exchange device 3, which in turn converts the voice packet into a packet according to an existing exchange device interface 8, so that DSL subscribers can be accommodated in the exchange device 3 directly and also exchange device software for operating the exchange device 3 can control call processing without knowing about a device under the control of a subscriber control unit, as a result, user burdens can be mitigated.

Abstract: In a state monitoring method in a subscriber line test in a communication system in which a subscriber telephone and a subscriber terminal are independently connected to a telephone exchange and an ADSL (Asymmetric Digital Subscriber Line) apparatus through a subscriber line, the telephone exchange to which a first control terminal is connected is connected, through an interface, to the ADSL apparatus to which a second control terminal is connected. A line blocked state due to a line test instruction is notified from one of the first and second control terminals to the other of the first and second control terminals through the interface. Upon receiving the notification of the line block state due to the line test instruction, the other of the first and second control terminals determines that the line blocked state is not caused by a fault. A state monitoring apparatus is also disclosed.

Abstract: A DSL 5 is connected between an exchange device 3 and an IAD1 to which DSL subscriber terminals 2-1 through 2-n are connected, and the exchange device 3 is equipped with a VMG 4 for terminating an ATM cell multiplexed over the DSL 5, a voice packet transmitted as multiplexed over the DSL 5 is directly terminated at the exchange device 3, which in turn converts the voice packet into a packet according to an existing exchange device interface 8, so that DSL subscribers can be accommodated in the exchange device 3 directly and also exchange device software for operating the exchange device 3 can control call processing without knowing about a device under the control of a subscriber control unit, as a result, user burdens can be mitigated.

Abstract: In a state monitoring method in a subscriber line test in a communication system in which a subscriber telephone and a subscriber terminal are independently connected to a telephone exchange and an ADSL (Asymmetric Digital Subscriber Line) apparatus through a subscriber line, the telephone exchange to which a first control terminal is connected is connected, through an interface, to the ADSL apparatus to which a second control terminal is connected. A line blocked state due to a line test instruction is notified from one of the first and second control terminals to the other of the first and second control terminals through the interface. Upon receiving the notification of the line block state due to the line test instruction, the other of the first and second control terminals determines that the line blocked state is not caused by a fault. A state monitoring apparatus is also disclosed.