| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring apparatus, for the vibration of a vehicle, in which a vehicle vibration characteristic can be measured with good accuracy by a simple test facility. SOLUTION: An excitation base 3 is used to input a vibration to a car body. A support frame 4 which is composed of a four-joint parallel link mechanism is connected to the lower part in the center of the excitation base 3. That is to say, the support frame 4 is supported so as to be capable of being rocked and moved up and down while the movement fulcrum O of the end 4a on one side. An excitation means 8 which is composed of a variable motion mechanism 7 provided with an eleastic member 6 such as a spring or the like by which a rotation driving force from a variable-speed driving motor is converted into a linear motion is connected to the end 4b, on the other side, of the support frame 4. An accelerometer 14 which is attached to a part of the excitation base 3 as well as a data recorder and a data analyzer which are connected to the sided of the car body constitute a vibration measuring means 13. As the accelerometer 14 which can be used for the measurement of a vibration, a single-axis pickup (a voltage-type accelerometer), a three-axis pickup (a voltage-type accelerometer) or the like which can measure an acceleration at a frequency of 1 to about 100 Hz and at 100 G (980 m/sec2) or lower is used.
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