摘要:
An active vibration damping system for damping vibration of a subject member, comprising: a fluid-filled vibration damping device having an elastic body partially defining a primary fluid chamber filled with a non-compressible fluid whose pressure is variable with the elastic deformation of the elastic body, an oscillating plate partially defining an auxiliary fluid chamber filled with the non-compressible fluid whose pressure is variable with the oscillation of the oscillating plate, and a drive means for generating a driving force for oscillating the oscillating plate; and a control device applying an electric drive pulse signal to the drive means and having a pulse signal generator for generating a control pulse signal whose frequency corresponds to that of the subject member's vibration, a phase modulator for modulating a phase of the control pulse signal depending upon a condition of the subject member's vibration, and a driving force regulator for adjusting a waveform of the control pulse signal to obtain the electric drive pulse signal, so that the driving force generated by the drive means corresponds to an amplitude of the subject member's vibration. The drive means generates the driving force whose magnitude corresponds to an amplitude of the electric drive pulse signal.
摘要:
A pneumatically operated active vibration damping device comprising a mounting member attachable to an object whose vibration is to be damped, a mass member elastically connected to the mounting member such that the mass member can be oscillated based on a periodic change of an air pressure in an air chamber connected to an air piping system, an active damping switch valve which is connected to the air piping system and which is operable for selective connection of the air chamber to a vacuum source and an atmosphere, to control a frequency and a phase of an oscillation of the mass member, and a pressure regulating switch valve connected to the air piping system, for alternately connecting and disconnecting the air chamber to and from the vacuum source and/or said atmosphere, so as to regulate a magnitude of said periodic change of said air pressure in said air chamber, for adjusting an amplitude of said oscillation of the mass member.
摘要:
Fluid-filled vibration damping device having a primary fluid chamber partially defined by an elastic body elastically connecting two spaced-apart mounting members and located on one of opposite sides of a partition structure having an orifice passage, an auxiliary fluid chamber partially defined by a flexible diaphragm and located on the other side of the partition structure, and a movable rubber plate partially defining the primary fluid chamber and held by the partition structure, wherein the partition structure comprises a support member including a cylindrical engaging portion, and at least one fluid-tightly fitted component superposed on the support member and each including a cylindrical engagement portion fitted in the engaging portion of the support member, and the movable rubber plate is bonded at its peripheral portion to the inner circumferential surface of the cylindrical engaging portion of the support member which is covered by a sealing rubber layer, and wherein the cylindrical engaging portion of the support member is radially inwardly drawn onto the cylindrical engagement portion of each fluid-tightly fitted component via the sealing rubber layer.
摘要:
A vibration damper including (a) an attaching member fixed to a subject member whose vibrations are damped by the vibration damping device, (b) a mass member displaceable relative to the attaching member in a vibration input direction, (c) an elastic connector elastically connecting the mass member to the attaching member and cooperating with the mass member to at least partially define a working chamber, and (d) a structure for defining a fluid passage communicating with the working chamber for changing a pressure of a fluid in the working chamber to thereby cause the mass member to be displaced relative to the attaching member in the vibration input direction.
摘要:
A method of setting control data by an active vibration isolation control system includes the steps of selecting, when a frequency of a pulse signal actually detected is superior to a predetermined frequency, appropriate control data selected from among predetermined data maps incorporating control data capable of securing, in accordance with various vehicle driving conditions respectively, a control condition in which operation of the vibrator is preferably controlled, calculating a deviation between the appropriate control data commensurate with the actual vehicle driving condition at the time of controlling and actually detected data representing vibration subjected to a vehicle specific position, the actually detected data obtained in terms of a same physics amount as a physics amount of the control data, and modifying the appropriate control data on the basis of the calculated deviation.
摘要:
A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically pulsating signal emitted from a vibration generating source of a vehicle, from the data map storage and generating a control signal. The adaptive controller generates the control signal with respect to the cyclically pulsating signal using an adaptive control method. The set-up frequency judge/switcher switches from the map controller to the adaptive controller or vice versa based on the frequency of the cyclically pulsating signal. The actuator actuates an actuator of the vibration insulator based on the control signal generated by the map controller or the adaptive controller, whereby inhibiting the vehicle from vibrating.
摘要:
A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically pulsating signal emitted from a vibration generating source of a vehicle, from the data map storage and generating a control signal. The adaptive controller generates the control signal with respect to the cyclically pulsating signal using an adaptive control method. The set-up frequency judge/switcher switches from the map controller to the adaptive controller or vice versa based on the frequency of the cyclically pulsating signal. The actuator actuates an actuator of the vibration insulator based on the control signal generated by the map controller or the adaptive controller, whereby inhibiting the vehicle from vibrating.
摘要:
A method of setting control data by an active vibration isolation control system includes the steps of selecting, when a frequency of a pulse signal actually detected is superior to a predetermined frequency, appropriate control data selected from among predetermined data maps incorporating control data capable of securing, in accordance with various vehicle driving conditions respectively, a control condition in which operation of the vibrator is preferably controlled, calculating a deviation between the appropriate control data commensurate with the actual vehicle driving condition at the time of controlling and actually detected data representing vibration subjected to a vehicle specific position, the actually detected data obtained in terms of a same physics amount as a physics amount of the control data, and modifying the appropriate control data on the basis of the calculated deviation.
摘要:
A damper main body of a dynamic damper comprises a long flat mounting plate portion, a rod-like central supporting metal member which is erected vertically in the center of a top face of the mounting plate portion, constituting a supporting member together with the mounting plate portion, cylindrical rubber bushings placed on the central supporting metal member in succession from its bottom side, a coil member, a magnet portion, a yoke and a cylindrical case mounted over the yoke. Grommets, which are cylindrical supporting portions made of rubber elastic bodies, are inserted into mounting holes in side plate portions of the mounting plate portion. The damper main body is fixed on a mating plate member through the compressed grommets such that it is floated over the mating plate member.
摘要:
Disclosed is a pneumatically operated fluid-filled active vibration-damping device including: a primary fluid chamber partially defined by an elastic body and filled with a non-compressible fluid; a movable member being elastically displaceable and partially defining the primary fluid chamber its one side; a working air chamber disposed on the other side of the movable member; and an air reservoir directly extending from the working air chamber and fluid-tightly closed at its protruding end portion. A fluid pressure variation in the primary fluid chamber is induced by an elastic deformation of the elastic body while being actively controlled by transmitting an air pressure variation applied to the working air chamber from an external area to the primary fluid chamber via the movable member. A vibration-damping apparatus using the vibration-damping device is also disclosed.