Abstract: Provided is a vibration control device mounted on a structure body of a target where vibration should be damped, including: a vibration detection unit that detects vibration of a portion of the target; a vibration generation unit that generates strain in a portion of the target; and a control unit that generates a control signal to determine drive force of the vibration generation unit based on a signal from the vibration detection unit. In the vibration control device, strain energy distribution of the target is measured or calculated, and setting positions of the vibration detection unit and the vibration generation unit are determined based on an optimization method within a range in which strain energy changes rapidly.

Abstract: Provided is a vibration control device mounted on a structure body of a target where vibration should be damped, including: a vibration detection unit that detects vibration of a portion of the target; a vibration generation unit that generates strain in a portion of the target; and a control unit that generates a control signal to determine drive force of the vibration generation unit based on a signal from the vibration detection unit. In the vibration control device, strain energy distribution of the target is measured or calculated, and setting positions of the vibration detection unit and the vibration generation unit are determined based on an optimization method within a range in which strain energy changes rapidly.

Abstract: A method for generating vibration and measuring vibration properties of a structure, such as information equipment, micro-electrco/mechanical systems, and large-equipment, using a non-contact type laser excitation in a non-contact type vibration property measurement system.

Abstract: An MRE excitation apparatus (100) comprises an excitation device (110) that generates vibration, and a transmitter (120) that is made using a non-magnetic material and that, with one end-section being fastened to the excitation device (110) and the other end-section being connected with a living body (300), and that extends in direction that vibration is transmitted from the excitation device (110) and transmits longitudinal vibration from the excitation device (110) to the living body (300). The frequency of the vibration is 125 Hz or greater, the amplitude of the vibration is 0.2 mm or greater, and the primary natural frequency of the longitudinal vibration of the transmitter (120) is further on the higher side than the frequency band of the vibration from the excitation device (110).

Abstract: A method for measuring a vibration property of a structure by applying an impulse input to the structure, which comprises: step (A) of pulse-irradiating the surface of the structure or a part adjacent to the surface with a laser beam to apply an impulse input to the structure and measuring a response output from the structure to which the impulse input has been applied; step (B) of determining the relationship between the laser intensity of the laser beam and the impulse input induced by the laser beam by a rigid pendulum method and determining an impulse input F corresponding to the laser intensity of the laser beam, with which the structure has been pulse-irradiated, based on the relationship; and step (C) of measuring the vibrational amplitude value of frequency response of the structure from the response output measured in step (A) and the impulse input F measured in step (B).