This is an article about EV203H electrodynamic vibration testing system’s testing report. The ambient temperature tested by the machine is 26.5 degrees Celsius and the humidity condition is 50%. Electrodynamic vibration testing system model: EV203H0404-2, Equipment’s Serial Numaber: WEW-L1910146. Vibration test system performance testing according to JJG948 1998: Digital electrodynamic vibration testing system. The testing report would provide recommendations and suggestions for test specimen’s functions and potential risk to ensure the continued reliable operation and accurate results of new products under development.
The electrodynamic vibration testing system final testing report provides typically includes an overview of the testing process, which would indicate how the system is set up, the protocols and procedures used, and any notable challenges encountered during testing. Additionally, it would include detailed results and analysis of the vibration tests themselves, including the frequency and amplitude of the vibration and any discrepancies or anomalies observed during testing.
1 Sine Test Performance Graph1.1 Vertical Situation Operation, Bare Armature, Only Moving Coil
| Frequency | Rated Bare Table Test Data | Amplifier Output/ Input | Accel. Waveform Distortion | ||||
| Hz | Acceleration (g) | Speed (m / s) | Displacement (mm) | Voltage (V) | Current (A) | Control Drive (V) | THD(%) |
| 5 | 2.01 | 0.62 | 40 | 32.9 | 3.4 | 0.61 | 10.89 |
| 15.9 | 20.3 | 2 | 40 | 106.4 | 5.4 | 1.90 | 13.24 |
| 78.0 | 100 | 2 | 108.8 | 33.0 | 1.94 | 1.69 | |
| 160 | 100 | 63.2 | 33.7 | 1.13 | 0.99 | ||
| 320 | 100 | 50.1 | 33.2 | 0.90 | 1.47 | ||
| 640 | 100 | 51.1 | 31.8 | 0.93 | 2.77 | ||
| 1000 | 100 | 53.2 | 29.3 | 0.97 | 8.11 | ||
| 1250 | 100 | 57.0 | 28.4 | 1.05 | 2.75 | ||
| 1500 | 100 | 49.8 | 22.7 | 0.92 | 2.70 | ||
| 2000 | 100 | 40.8 | 15.5 | 0.77 | 2.17 | ||
| 2500 | 100 | 22.8 | 6.6 | 0.44 | 3.04 | ||
| 3000 | 100 | 5.1 | 2.5 | 0.08 | 1.89 | ||
1.2 Maximum Sinusoidal Rated Scan Curve: Bare Table/ No load, D= 40 mmp-p, V= 2.0 m/s, A= 100 g-peak, f0= 2972.92 Hz
1.3 Max Armature Table Uniformity (from 5 to 2400Hz)｜Uniformity of Moving Coil Table
1.4 Max. Cross Axis Ratio of Armature Table (from 5 to 2400Hz)
2 Random Test Performance Graph
2.1 Max Random Performance Graph According to ISO 5344｜Payload= 23 kg (finite loading 20Kg) f0= 1925 Hz, A= 10*100%=10 g rms Vmax=36.6v Imax=19.5A｜The load mass is more than 3 times of the moving coil mass, and the vibration point falls within 2000Hz after loading. If the output is greater than 2000Hz, the output is 70% of the rated value.
2.2 Random Control the Dynamic Range >40db
3.2 Max Half Sine Shock Graph 2 (26 gpeak@6ms duration, payload = 15-3kg)｜The thrust is 2 times the maximum thrust of the sine @ 6ms｜The maximum thrust sine of the machine is 2 times when using 6ms
4 Head Expander, Operation, Bare Table, Vertical Table
4.1 Head Expander (400mmx400mm) first axial resonance frequency: f0 (first-order frequency) = 1716.89Hz｜Below 500, the table is up to 2500, and the rest is up to 2000Hz, find the resonance valley point
4.2 Head Expander (400mm x 400mm 14kg) 13 g Sweeting Test, fu operating frequency= 1500 Hz｜No-load maximum acceleration sweep frequency of vertical table
5 V-Guide Oil Film Slip Table, Operation, Bare Table, Horizontal Table
5.1 Slip Table (400mm x 400mm 14kg) first axial resonance frequency (skateboard): f0 first order frequency = 1864.33Hz
5.2 Slip Table (400mm x 400mm 14kg) Random Performance Graph according to ISO 5344｜ISO 5344 Maximum Random Output
Payload=19 kg (14Kg with skateboard, Drive row 2 Kg, Load 0 Kg) f0 first order frequency = 1855 Hz, A= 12*100%=12 g rms Vmax=38.5v Imax=22.6A
After loading the skateboard, the resonance point falls within 2000Hz. If it is greater than 2000 Hz, the output is 70% of the rated value.
