Abstract: A damping force control apparatus for a vehicle in which road surface displacement-related information corresponding to left and right wheels detected by a pair of in-vehicle detection devices is transmitted to a preview reference database control device together with the detection position information, a preview reference database including road surface displacement-related values is created, preview damping control that reduces vibration of a sprung of the vehicle is performed using the road surface displacement-related values in the preview reference database, and it is assumed that road surface displacement-related values in predetermined adjacent regions located in a direction crossing a traveling direction of the vehicle with respect to two points where the road surface displacement-related information was detected by the pair of in-vehicle detection devices are the same as an in-phase component of the road surface displacement-related values at the two points.

Abstract: A vibration damping control apparatus for a vehicle executes preview vibration damping control while obtaining, from preview reference data, a road surface displacement related value relating to a vertical displacement of a road surface at a predicted passage position of a wheel of the vehicle. In the preview reference data, relationships are established among the road surface displacement related value obtained when a measurement vehicle actually traveled on the road surface, position information representing the position of a wheel of the measurement vehicle when the road surface displacement related value was obtained, and speed information representing the speed of the measurement vehicle when the road surface displacement related value was obtained or representing a speed range in which the speed of the measurement vehicle is contained.

Abstract: A vehicle travel control system includes: a sensor for detecting an acceleration or an angular velocity of a sprung mass structure of the vehicle; and a controller configured to: calculate a first sprung parameter being a velocity or a displacement of the sprung mass structure from the sensor detection value; apply a high pass filter to the first sprung parameter to acquire a second sprung parameter; and control travel of the vehicle based on the second sprung parameter. The controller changes strength of the high pass filter according to an offset level representing a magnitude of an offset component of the first sprung parameter. Regarding a first offset level and a second offset level higher than the first offset level, the high pass filter is stronger in a case of the second offset level than in a case of the first offset level.

Abstract: A damping control apparatus has a control unit that controls an active actuator that generates a control force for damping a sprung, and the control unit determines a predicted wheel passage position where a wheel is predicted to pass, performs a high-pass filtering on a first road surface displacement-related value, performs a low-pass filtering on a second road surface displacement-related value, calculates a target control force for damping the sprung when the wheel passes through the predicted wheel passage position based on a sum of the first road surface displacement-related value after high-pass filtering and the second road surface displacement-related value after low-pass filtering, and the second road surface displacement-related value has a higher possibility that a position where a control force corresponding to the target control force is generated misaligns with the predicted wheel passage position as compared with the first road surface displacement-related value.

Abstract: A control unit configured to control a control force generating device configured to generate a control force for damping a sprung portion of a vehicle controls the control force generating device based on a target control force Fcit for damping the sprung portion when a wheel passes through a predicted wheel passing position. The control unit acquires an unsprung displacement z1i at the predicted wheel passing position, and calculates the target control force as a value proportional to an unsprung displacement z1ai that is the unsprung displacement z1i having a phase that has been advanced to advance a phase of a transfer function from the unsprung displacement z1i to the target control force by a phase advance amount larger than 0 degrees and smaller than 180 degrees.

Abstract: A damping control device includes a control force generating device and a controller. The controller is configured to acquire road surface displacement related values related to a plurality of road surface displacements in a predetermined sampling zone, acquire an amplitude index indicating a magnitude of an amplitude of the sampled values, determine an operation delay period of the control force generating device based on the magnitude of the amplitude indicated by the amplitude index, calculate target control force for reducing vibration of a vehicle body based on the road surface displacement related values at a predicted passing position where a wheel is predicted to pass after an elapse of the operation delay period from a current time, and transmit, to the control force generating device, a control command for causing the control force generating device to regulate the control force to agree with the target control force.

Abstract: A data processing system including a data processing apparatus that can generate an accurate road surface displacement correlating value that is used for a preview damping control is provided. The system includes a cloud having a data processing section and a processing-data-base-section for temporally storing data. The data processing apparatus stores sensing data in the processing-data-base-section, wherein the sensing data is a chunk of sensor values from which a road surface displacement correlating value correlating with a vertical displacement of a road surface on which said vehicle is traveling can be calculated. The sensor values are sequentially and successively detected/obtained by various sensors of the vehicle. The data processing section performs specific offline data processing for a chunk of the sensing data stored in the processing-data-base-section so as to generate data of the road surface displacement correlating value from the sensing data.

Abstract: A damping control device for a vehicle includes a control force generating device configured to generate vertical control force between a vehicle body of the vehicle and at least one wheel suspended from the vehicle body by a suspension, and an electronic control unit configured to reduce, by controlling the control force generating device to change the control force, vibration of the vehicle body that is caused by vertical vibration occurring in the wheel in response to vertical road surface displacements while the vehicle is traveling, the vertical vibration being transmitted to the vibration of the vehicle body via the suspension.

Abstract: A damping control device for a vehicle calculates a combined control force by adding together a control force when a front wheel passes through a predicted passing position and a control force when a rear wheel passes through a predicted passing position, and calculates a final control force for the front wheel and a final control force for the rear wheel by distributing the combined control force at a predetermined distribution ratio.

Abstract: A position estimation device includes an ECU. The ECU is configured to estimate the position of a vehicle using at least a traveled distance of the vehicle. The ECU calculates correction factors for a reference tire rolling radius and stores the correction factors in a storage device. Each of the correction factors is set for a corresponding one of a plurality of vehicle speed ranges. The ECU calculates the traveled distance of the vehicle based on a rotation parameter and the corrected reference tire rolling radius obtained by correcting the reference tire rolling radius using the correction factor.

Abstract: A control unit is configured to execute vibration suppression control, in which the control force generation device is controlled based on a target vibration suppression control force when a wheel passes through a predicted wheel passage position, and roll control, in which the control force generation device is controlled based on a target roll control force for reducing roll of the sprung portion based on a roll index value. When the vibration suppression control and the roll control are executed concurrently, the control force generation device is controlled based on the target vibration suppression control force and the target roll control force obtained after at least one of a reduction correction for the target vibration suppression control force and an increase correction for the target roll control force is performed.

Abstract: A damping control apparatus has a control unit that controls an active actuator that generates a control force to damp a sprung, and a storage device for storing a unsprung displacement acquired based on a vertical motion state quantity of a vehicle when the vehicle travels, and the control unit determines a predicted wheel passage position where a wheel is predicted to pass, calculates a time derivative value of an unsprung displacement at the predicted wheel passage position acquired by a preview sensor, calculates a target control force based on a sum of a first control component proportional to the time derivative value and a second control component proportional to an unsprung displacement at the predicted wheel passage position acquired from the storage device, and controls a control force generating device so that a control force when the wheel passes the predicted wheel passage position becomes the target control force.

Abstract: A damping control device for a vehicle calculates a weighted sum of a first control force of feedforward control and a second control force of feedback control as a target value of a damping control force. When a degree of a deviation of a path of a rear wheel from a path of a front wheel is larger than a predetermined first degree, the damping control device sets a weight for the second control force to be larger than a weight for the first control force in the weighted sum.

Abstract: An apparatus includes a generator and a control unit. The generator generates a vertical controlling force between a vehicle body and one wheel for damping a vehicle sprung mass vibration. The control unit changes the controlling force by controlling the generator based on an unsprung mass state quantity at an estimated passage position of the wheel at time after a predetermined time from current time; when a condition that a sprung mass of a sampling vehicle is highly likely to be resonating when the sampling vehicle passes through the estimated passage position is satisfied, compute a target controlling force based on a value less than the unsprung mass state quantity acquired by the sampling vehicle at the estimated passage position; and, at the time at which the wheel passes through the estimated passage position, control the generator such that a controlling force is equal to the target controlling force.

Abstract: A damping control device is configured to acquire, as a preview condition amount, an unsprung condition amount at a predicted passing position where a wheel of a vehicle is predicted to pass, based on preview reference data being sets of data in which unsprung condition amounts and pieces of positional information of the wheel are linked to each other. The unsprung condition amounts indicate a displacement condition of an unsprung portion displaced in a vertical direction due to a displacement of a road surface acquired when the vehicle has traveled on the road surface. The damping control device is configured to execute, at a timing when the wheel passes through the predicted passing position, preview damping control to cause control force to agree with a target control force.

Abstract: The preview damping control includes an ECU. When the vehicle is traveling within a communications disruption area in which a radio communication device is hard to communicate with a cloud, the ECU uses road surface displacement correlating information that has been stored in an on-board memory device in advance for the communications disruption area so as to perform a preview damping control.

Abstract: A suspension control system includes: a suspension that couples a sprung structure and an unsprung structure of a vehicle; a stabilizer; and a control unit configured to estimate a stroke speed, wherein the vehicle includes first wheels and second wheels, the suspension includes first suspensions provided for the first wheels and second suspensions provided for the second wheels, the stabilizer includes a first stabilizer bar that couples the first suspensions, the control unit includes: indirect stabilizer force calculation unit configured to calculate an indirect stabilizer force received by each of the second suspensions in conjunction with a posture change of the sprung structure; sum calculation unit configured to calculate a sum of forces acting on each of the second suspensions; and an observer configured to receive the sum and output an estimation value of a stroke speed of each of the second suspensions.

Abstract: A traveling control system for a vehicle includes a first sprung structure acceleration sensor, a second sprung structure acceleration sensor, a third sprung structure acceleration sensor, a fourth sprung structure acceleration sensor, and an electronic control unit. The electronic control unit is configured to calculate a vertical acceleration, a roll acceleration, and a pitch acceleration at a gravity center position, calculate vertical accelerations of a sprung structure at positions of a front right wheel, a front left wheel, a rear right wheel, and a rear left wheel, and control traveling of the vehicle based on the vertical accelerations of the sprung structure at the positions of the front right wheel, the front left wheel, the rear right wheel, and the rear left wheel.

Abstract: A vacuum pump with abatement function which can prevent contamination of a process chamber without allowing products generated by exhaust gas treatment to flow back to the process chamber, and can reduce the amount of gas to be treated without allowing a purge gas and a diluent gas to be contained in an exhaust gas, and thus can achieve energy saving by reducing the amount of energy required for the exhaust gas treatment in an abatement part is disclosed. The vacuum pump with abatement function includes a vacuum pump to which at least one abatement part for treating an exhaust gas is attached. The vacuum pump comprises a dry vacuum pump having a pair of multistage pump rotors each of which comprises a plurality of rotors arranged on a rotating shaft, and the at least one abatement part is connected to an interstage of the multistage pump rotors.

Abstract: A vacuum pump with abatement function which can prevent contamination of a process chamber without allowing products generated by exhaust gas treatment to flow back to the process chamber, and can reduce the amount of gas to be treated without allowing a purge gas and a diluent gas to be contained in an exhaust gas, and thus can achieve energy saving by reducing the amount of energy required for the exhaust gas treatment in an abatement part is disclosed. The vacuum pump with abatement function includes a vacuum pump to which at least one abatement part for treating an exhaust gas is attached. The vacuum pump comprises a dry vacuum pump having a main pump capable of evacuating gas from an atmospheric pressure and a booster pump for increasing an evacuation speed of the main pump, and the at least one abatement part for treating the exhaust gas is connected between the main pump and the booster pump.