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Electromagnetic Shaker Vibration/ Vibration Shaker Testing Machine
Introduction:
The random vibration test of the shaker (GB/ t2423.56-2006) is excited by a random input signal that includes all frequency components within the specified frequency range (broadband) at all times.Its instantaneous value obeys normal (gaussian) distribution.The distribution in the frequency range is represented by the acceleration spectral density (ASD) curve.
Random vibration is the most common type of excitation occurring in the real world.Its future instantaneous value cannot be predicted by its past state, but can only be predicted based on probability.In fact, these characteristics are applicable to most calculations related to random vibration, such as fatigue and alternating stress.
Unlike the sinusoidal test, the random vibration of the test bed is always excited and resonant in the duration, although it cannot reach the maximum value.Most of the random signals in the laboratory have a 3 times RMS, which means that the instantaneous value of excitation within the test frequency range can be extended from zero to 3 times the total RMS (R.M.S.).The larger difference to be taken into account for the random excitation is that there will be a large number of stress alternations, both positive and negative, between the crossing points.This property will affect fatigue damage and thus the expected life of failure.
No matter sinusoidal vibration or random vibration, only with a better understanding of the product's production, transportation, use environment and the properties and characteristics of the test equipment, can we more properly choose our own appropriate vibration mode, so as to screen high-quality products and improve the performance of defective products.
Electro-dynamic Vibration Testing System Performance Data Sheet:
| Shaker (Model# EDM-2000) | ||
| Sine force (peak) | 30kN | |
| Shock force (peak) | 60 kN | |
| Frequency range | 5～2,600 Hz | |
| Displacement (continuous) | 100 mm | |
| Max. Velocity | 1.8 m/s | |
| Max. Acceleration | 75 G | |
| Armature Diameter | 445 mm | |
| 1st order resonant frequency | 2,400 Hz | |
| Allowable eccentric moment | ＞500 Nxm | |
| Armature weight | 40 kg | |
| HE/ST screw dimension | M10 (metric) | |
| Axial vibration isolation frequency | ＜3 Hz | |
| Max. Payload | 500 kg | |
| Magnetic flux leakage | ≤1 mT | |
| Dimensions (L×W×H, unpacked) | 1,330x860x1,250 mm | |
| Weight (unpacked) | 2,500 kg | |
| Installation | Rubber mat (anchor bolts required) | |
| Power Amplifier (Model# VSA-H323A) | ||
| Amplifier output | 30 kVA | |
| SNR | ＞65 dB | |
| Rated output voltage | 120 Vrms | |
| Amplifier efficiency | ＞ 90% | |
| Dimensions (L×W×H, unpacked) | 800x900x2,100 mm | |
| Weight (unpacked) | 500 kg | |
| Blower (Model# PBL-W30) | ||
| Air volume | 0.46 m3/s | |
| Power | 7.5 kW | |
| Air duct diameter | 200 mm | |
| Air pressure | 8.8kPa | |
| Installation | Able to connect to ceiling (up to two 90 degree bends), max 20’ run | |
| Horizontal Slip Table (Model# 30ST-600M) | ||
| Dimensions | 600x600 mm | |
| Thickness | 45 mm | |
| Frequency limit | 2,000 Hz | |
| Effective mass | 54 kg | |
Note: 1. High pressure oil-film bearing is used for better uniformity. | ||
| Vibration Controller and Accelerometer | ||
| Vibration Controller VT-9008-4 | 4 Channel Vibration Controller with Sine and Self Calibration. | |
| Accelerometer EA-YD-181 | 100mV/g, Range: 50g, Working Freq.: 1-10kHz, Weight: 11gram, with 10ft low noise cable | |
| Other supported functions/accessories | ||
| Environmental chambers | Supported | |
| Mobile devices | Customizable | |
| Insulation boards | Customizable | |
| Fixture | Customizable | |
| Working environment of the system | ||
| Temperature range | 0-40℃ | |
| Humidity range | 0～90% , no condensation | |
| Power requirements | 380V/3ph/50Hz, 40kVA | |
| Compressed air pressure | 0.6 Mpa | |
How to use IT:
1, the control manual to complete the procedure
2, such as Operation error so that can not work, you can use the recovery method of the steps of the input, and then set a single group or other running steps.
3, before use to press the external start switch, appears COO namely lets go, opens the key.
4, Taiwan Body:
1 The table body foot sleeve as far as possible fixed
2 power supply on/work in the output line can not be unplugged
3 Place the level as far as possible
4 components can be changed, the line should not be changed or from the connection.
5 The Taiwan body must not be all or part of the reorganization, only according to specifications for a single component and with the original confirmation password.
5, the amplitude inside the code
1. Do not adjust too large before or after the boot
2) low-key amplitude of high amplitude modulation
3 Control Panel Amplitude Knob placed in the middle position test items: placed to focus on the main point, reduce the left flat right.
4 control Box: Can not be placed on the top or underground operation
6, Inside Code:reset when running or operating incorrectly
7, Control Box:
1) The connecting line of the body must be locked tightly after hanging
2 the vibration direction switch and the output connection line are correspondence, can not connect the wrong
8, testing: Non-special test should use full wave test
9, the Taiwan body: can not produce the collision sound, the upper and lower center axis mutual touch will cause the spring steel piece rupture to be immediately shut down, amplitude modulation is adjusted small then turns on.
10, other unknown:
Do not arbitrarily change internal components and lines
11, the reason is bad:
1 The use of computer models can not be used for shaking table control
2 can not reload the driver
2, for the Ista-ia test, the operator to protect the sample, to prevent the test pieces slide out of the table
