2831 results about "Vibration control" patented technology

The present invention relates to synchronized vibration devices that can provide haptic feedback to a user. A wide variety of actuator types may be employed to provide synchronized vibration, including linear actuators, rotary actuators, rotating eccentric mass actuators, and rocking mass actuators. A controller may send signals to one or more driver circuits for directing operation of the actuators. The controller may provide direction and amplitude control, vibration control, and frequency control to direct the haptic experience. Parameters such as frequency, phase, amplitude, duration, and direction can be programmed or input as different patterns suitable for use in gaming, virtual reality and real-world situations.

The present invention related to an input device including: an image display unit (30) that displays information; a touch panel (15) with which a user performs input operation of information by touching a portion corresponding to the position at which the information of the image display unit is displayed; a vibration generation device (71) disposed in the image display unit and feeds back, to the user, various kinds of sense of touch in accordance with the type of the information through the touch panel; and a vibration control circuit (73) for allowing the vibration generation device to generate various forms of vibrations in accordance with the type of the information. The vibration generation device is a bimorph piezoelectric actuator. Each of first and second actuator units has multi-layered piezoelectric elements (63). By this way, it is possible to provide an input/output device capable of surely realizing a feedback to user's input operation performed in accordance with the type of information through the sense of touch when the user performs an input operation of information to a touch panel using the sense of touch.

An object of the present invention is to execute an optimum control of vibrations due to a driver's operation of an accelerator pedal, steering wheel and brake pedal. The operation instructions are inputted into a vibration calculating means (kinetic model) comprising a vehicle body model, suspension model and tire model. Conventional kinetic model controlled the suspension in order to suppress the vehicle body vibration. However, in the kinetic model of the present invention, the tire vibration due to a change in the engine output is first absorbed by the suspension, whereby a residual vibration which was not be absorbed yet by the suspension is transferred to the vehicle body. The operation inputs are compensated by the three feed-back loops between the outputs of the above-mentioned three portions and input of the tire portion, giving the highest priority on the vehicle body model.

A digital processing link for a vibration control system collects sensor signals at a transfer station and combines the sensor signals into a collective signal that is transmitted under a digital communications protocol to a base station. The sensor signals are separated at the base station and individually processed to produce one or more output control signals to actuators for counteracting the measured vibration.

A helicopter rotating hub mounted vibration control system for a helicopter rotary wing hub having a periodic vibration while rotating at a helicopter operational rotation frequency. The helicopter rotating hub mounted vibration control system includes an annular ring rotary housing attachable to the helicopter rotary wing hub and rotating with the helicopter rotary wing hub at the helicopter operational rotation frequency. The annular ring housing is centered about the rotary wing hub axis of rotation and has an electronics housing cavity subsystem and preferably an adjacent coaxial rotor housing cavity subsystem. The rotor housing cavity subsystem contains a first coaxial frameless AC ring motor having a first rotor with a first imbalance mass and a second coaxial frameless AC ring motor having a second rotor with a second imbalance mass. The electronics housing cavity subsystem contains an electronics control system which receives sensor outputs and electrically controls and drives the first coaxial frameless AC ring motor and the second coaxial frameless AC ring motor such that the first imbalance mass and the second imbalance mass are directly driven at a vibration canceling rotation frequency greater than the helicopter operational rotation frequency wherein the helicopter rotary wing hub periodic vibration is reduced.

A method for reducing vibration of a drilling tool assembly is disclosed. The method includes modeling the drilling tool assembly based on input parameters, simulating a vibration of a drill string coupled with a vibration of a drill bit, determining an initial total vibration from output parameters generated by the simulation, determining a location for at least one vibrational control device based on the initial total vibration to reduce the initial total vibration, and disposing the at least one vibrational control device on the drill string at the determined location.

A control device for a hybrid vehicle, the hybrid vehicle comprising an engine and a motor as power sources, the control device including: a battery device sending energy to and receiving energy from the motor, a temperature sensor for measuring the temperature of the battery device; a control section which is adapted to execute a warming control operation for the battery device when the temperature of the battery device is low; and a determination section for determining whether a cylinder deactivation operation is permitted for the engine depending on the running state of the engine. The control section executes a vibration control operation for the engine by operating the motor so as to reduce vibration of the engine when it is determined by the determination section that the partial cylinder deactivation operation is permitted for the engine, and to perform the warming control operation for the battery device by executing a vibration control operation for the engine.

A device for control of the effects of vibrations on vibration sensitive equipment when a plurality of the devices are placed on a support surface and in operative contact with the vibration sensitive equipment is a unitary piece of a soft, pliable substance. The device has a top and a bottom and an exterior side wall extending between the top and the bottom. The exterior side wall is formed into a plurality of distinct levels between the top and the bottom, to thereby isolate vibrations which can affect the performance of the piece of vibration sensitive equipment.

A method and apparatus for minimizing the amplitude of mechanical vibrations of a mechanical apparatus including a linear, freely reciprocating, prime mover coupled to and driving a reciprocating mass of a driven machine in reciprocation at a driving frequency. The coupled prime mover and driven machine have a spring applying a force upon the reciprocating mass to form a resonant main system having a main system resonant frequency of reciprocation. A driving frequency range over which the driven machine operates at an acceptable efficiency of operation is determined and stored. A parameter of the operation of the mechanical apparatus, such as the amplitude of vibrations or an operating temperature, is sensed and the prime mover is driven in response to the sensed parameter at a driving frequency that is offset from the main system resonant frequency of reciprocation, is within the driving frequency range of acceptable efficiency of operation and reduces or minimizes the amplitude of mechanical vibration of the mechanical apparatus under existing operating conditions.

A control apparatus of an insertion apparatus in which a state specifying unit specifies a state of an insertion member to carry out vibration control depending on the state, thereby removing getting-stuck of a tip of the insertion member with a vibration having such a proper magnitude as not to cause an overload in a case where the tip of the insertion member is gotten stuck.

To set up such a constitution that no compression forces act on braces, alternatively, to set up a constitution that makes it possible to make compression forces to be applied to braces smaller extremely; and to provide a vibration control device for beam-and-column frame that can demonstrate high vibration control performance.

A rotary supporting member 40 supports a parallel member 30 rotatably with respect to an upper beam 13. A first brace 60 connects an opposite-end side of the parallel member 30 with an opposite-end side of a lower beam 14. A second brace 70 connects another opposite-end side of the parallel member 30 with another opposite-end side of the lower beam 14. An intersection position of the first brace 60 with the second brace 70 is positioned more adjacent to a side of the upper beam 13 than where an intermediate position between the upper beam 13 and the lower beam 14 is present. The resulting vibration control device includes damper members (80, 90) being disposed respectively so as to be interposed between the parallel member 30 and the upper beam 13, connecting the parallel member 30 with the upper beam 13, and being disposed to make a pair at least on both sides each of which is separated away from the rotary supporting member 40 to interpose the rotary supporting member 40 therebetween.

An electrolytic capacitor comprising a plurality of polymeric structures molded about the periphery of the anode pellet is described. The polymeric structures contact between a weld strap surrounding the butt seam between mating “clamshell” casing portions and the anode pellet sidewall. That way, the anode pellet is restrained from moving along both an x- and y-axes inside the casing. Having the cathode active material contacting the opposed major casing sidewalls being in a closely spaced relationship with the anode pellet through an intermediate separator prevents movement along the z-axis. The resulting capacitor is particularly well suited for use in high shock and vibration conditions.

A hand-held massager capable of self-excited, impedance-matched vibration for optimal massaging of each particular body part of each particular individual. The massager includes a hollow, open-ended contact piece to which is coupled a vibrator and which is to be held against a desired body part. A pressure sensor is mounted to the contact piece for sensing pressure variations in the cavity in the contact piece while the open end thereof is held against the body part, in order to ascertain the mechanical impedance of that body part. A closed-loop, electropneumatic vibration control system makes it possible for the mechanical impedance to be fed back to the vibrator, causing the latter to make self-induced vibration. Thus the desired body part is optimally massaged at its resonance frequency.

A device and method for generating vibrations in a portable terminal are disclosed. The device for generating vibrations comprises: a haptic actuator which is driven by a driving signal so as to generate vibrations; and a control unit for applying the driving signal to the haptic actuator, causing the haptic actuator to have a high impedance and controlling a start time of the driving signal of non-periodic pulses to be applied to the haptic actuator, on the basis of a counter-electromotive force signal generated by the haptic actuator.

The present invention relates to a magnetic suspension reaction flywheel open-loop high-accuracy unbalanced vibration control system. It includes the following several portions: displacement sensor, displacement signal interface circuit, rotating speed detection device, magnetic bearing controller, magnetic bearing power amplification drive circuit and flywheel position identification device. The magnetic bearing controller includes axial bearing controller and radial bearing controller, the radial bearing controller is formed from two portions of stabilization controller and unbalanced vibration controller, in which the unbalanced vibration controller can be used for making compensation for displacement feedback of stabilization controller.

A touch-panel input device having a function for providing vibrations includes a touch panel receiving an operation on an operation item on a display panel, a vibration-controlling unit vibrating the touch panel, an operation detector detecting an operation on the touch panel, and an operation-mode controlling unit setting an operation mode of the touch panel to an input operation mode for vibrating the touch panel upon detecting a touch on the touch panel, or either a speaker mode for vibrating the touch panel to produce sounds or a microphone mode for allowing voice input by transmitting vibrations generated on the touch panel when the operator speaks to the touch panel. The operation-mode controlling unit changes the operation mode to the input operation mode when the operation mode is set to the speaker mode or the microphone mode upon detecting an operation on the touch panel.

The present invention relates to an anti-jerk control apparatus and method for an Hybrid Electric Vehicle (HEV).

The anti-jerk control apparatus includes a model speed calculation unit for calculating a model speed of the motor in a state in which a vibration of a drive shaft is not considered. A vibration occurrence determination unit detects a speed vibration component while calculating a reference speed difference and an average speed difference from differences between the model speed and an actual speed of the motor, thus determining whether a vibration occurs on the drive shaft. A torque correction value calculation unit calculates a motor torque correction value for anti-jerk required to damp the vibration of the drive shaft, and controls torque of the motor if the vibration occurrence determination unit determines that the vibration occurs on the drive shaft.

The invention discloses a spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method. The method comprises the following steps of: 1) erecting six-displacement-sensor parallel measuring and damping vibration attenuating mechanism; 2) fixing a detected motion object and a fixed platform; 3) obtaining a motion variation rule by using an expansion variation displacement time of an expansion pull rod, and obtaining a vibration rule of the detected motion object by using a measurement algorithm with a positive solution; 4) obtaining a damping value of a six-degree-of-freedom controllable damper required by the vibration by using a damping vibration attenuating algorithm; and 5) adjusting the damping value of the six-degree-of-freedom controllable damper to a value obtained by the damping vibration attenuating algorithm. According to the invention, six-degree-of-freedom measurements of three vibration displacements and three vibration angles of the motion object at the same measurement point are achieved by using one set of mechanism; meanwhile, the vibration control of the motion object can be achieved; and the spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method disclosed by the invention has the advantages of high accuracy, simple structure, good flexibility, strong adaptability, wide application range and the like.

A computer programmable system and program product for controlling vibrations is provided. The computer programmable system and program product include first program instructions for actively driving a first imbalance mass concentration rotor and a second imbalance mass concentration rotor at a vibration canceling rotation frequency while controlling the rotational position of the first imbalance mass concentration and the second imbalance mass concentration to produce a rotating net force vector to inhibit periodic vibrations. The computer programmable system and program product include second program instructions to opposingly orient the first imbalance mass concentration relative to the second imbalance mass concentration during a starting stopping rotation speed less than the vibration canceling rotation frequency. The system and product preferably include a fault mode control protocol for controlling a rotation of the rotors during a sensed failure of the rotating assembly vibration control system.