MIL-STD810G Water Cooled Electromagnetic Vibration Testing Machine
Equipment Overview
Vibration testing is the act of exciting or shocking a component or
device to see how it would react in a real environment. The
application range of vibration test is extremely wide, from
industrial products such as circuit boards, aircraft, ships,
rockets, missiles, automobiles and household appliances.
Laberton can provide you with the whole excitation and testing
scheme, and prove the quality of the products for you according to
national and international standards, such as GB, GJB, UL, JIS,
DIN, ISO, BS, MIL, IEC and ASTM.
Vibration machine selection formula and vibration generator
structure diagram
The test conditions provided by custsomer’s company;
Test type: Sine sweep; Random; Classic Shock;
Frequency response range: 1-2700Hz
Formula: A(g)=(2πf)2Dcm/980≒A=0.002DmmF2
D=A/0.002F2 F=M(kg) ×A(g)
Technical Parameters
| E90T45 electromagnetic excitation generator parameters |
| Maximum Sinusoidal Excitation Force | 9000Kg.f peak |
| Maximum Random Exciting Force | 9000Kg.f rms |
| Maximum Impact Excitation Force | 18000Kg.f peak |
| Frequency Range | 1～2700 Hz |
| Maximum Displacement | 76 mm p-p |
| Maximum Speed | 2m/s |
| Maximum Acceleration | 120G(1176 m/s2) |
| Maximum load and acceleration relationship: F=M.A |
| 5G(49m/s2) | 10G(98m/s2) | 20G(196m/s2) | 30G(294m/s2) |
| 2295kg | 1095kg | 495kg | 295kg |
| First Order Resonant Frequency | 2200 Hz±5% |
| Maximum load: | 1200 kg |
| Vibration isolation frequency: | 3 Hz |
| Moving coil diameter: | Ф450 mm |
| Moving coil weight: | 90kg |
| Flux leakage | ＜10gauss |
| Allowable eccentric moment | ＞1000N.m |
| Equipment size | 1700mm×1360mm×1540mm (not including vertical expansion table) |
| Equipment weight | 5900 kg |
| LA-100 digital switching power amplifier |
| Output power | 100KVA |
| Output voltage | 110Vrms |
| Output current | 1000Arms |
| SNR | ≥65dB |
| Amplifier size | 3300mm×810mm×2170mm |
| Amplifier weight | 3700kg |
| Servo protection system |
| Function | It has: power grid overvoltage, grid undervoltage, logic fault,
power module protection, power module temperature, output
overcurrent, output overvoltage, drive power supply, platform
displacement, platform temperature, external interlocking and other
protection circuits. When any failure occurs, the output will be
turned off, and the sound and light will alarm at the same time. |
| Digital vibration controller VCS-4 |
| Hardware configuration | 4 simultaneous input channels, 1 output channel |
| Control function module | Sine, random, typical shock, resonance search and dwell |
| Control computer | Original brand computer with LCD monitor |
| Software | Chinese/English operation, time domain and frequency domain
analysis, signal source, sine frequency sweep analysis, etc. can be
performed. It can automatically generate WORD test reports,
display, store, set test parameters and analyze functions of
signals and data. |
| System accelerator | Frequency range: 1—12000Hz Sensitivity: 50mv/g Temperature range: -24 - 250°C |
| VT120 vertical extension table |
| Material | Magnesium alloy, surface hardened |
| Table size | 1200×1200 mm |
| Fixed hole | M12 rectangular distribution 100mm*100mm stainless steel screw
sleeve, durable and wear-resistant |
| Upper limit usage frequency | Sine 500 Hz, Random 1500 Hz |
| Weight | About 165Kg |
| HB120 horizontal oil film slide table |
| Material | Magnesium alloy, surface hardened |
| Table size | 1200×1200 mm |
| Fixed hole | M12 rectangular distribution 100mm*100mm stainless steel screw
sleeve, durable and wear-resistant |
| Upper limit usage frequency | Sine 2000 Hz, Random 2000 Hz |
| Weight | 170Kg (without connector) |
| Water cooling unit WCU |
| heat exchange capacity | 100KW cooling water tower 15T |
| Outer circulation water flow/pressure | 200L/min 0.25-0.4Mpa |
| Distilled water requirement | Water hardness 30ppm, PH7-8, conductivity 1us/cm |
| Outer circulation water pipe interface | 1-1/4"or DN32 |
| Dimensions (L×W×H) | 610mm×900mm×2000mm |
| Weight | 380kg |
| Electrical requirements |
| Power supply | 3-phase 5-wire 380V/50Hz 162 KW |
| Compressed air | 0.6Mpa |
| Ground resistance | ≤4Ω |
Introduction of Product technology and function
The water-cooled vibrating table series has many advantages such as
large thrust, strong bearing capacity, high cooling efficiency, and
a maximum displacement of 76mm.
Meet various typical vibration test requirements for large
electronic assemblies, automation devices, aerospace large
components, artificial satellites, space and military systems.
When the trunnion system is specially designed and the client
provides a suitable foundation, the system can start from a low
frequency of 1Hz or even DC, whether it is sinusoidal or random
vibration.
Random Performance Indicators
VCS5X random control function provides fast and precise random
vibration control. The adaptive control algorithm based on the
transfer function can quickly respond to the nonlinearity of the
system, the resonance vibration point and the change of the dynamic
load, greatly improving its control accuracy and obtaining a fast
loop time.
Control method
Equalization Method: Transfer Function
Control loop: Adaptive control based on transfer function update,
which can quickly respond to changes in system nonlinearity,
resonance vibration points and dynamic loads
control performance
Dynamic range: 90dB
Control accuracy: ±1dB
Closed loop time: typical value 100mS
drive signal
A continuous Gaussian random signal.
Control parameters
Frequency range: from 0 to 145 Hz, 250 Hz, 290 Hz, 500 Hz, 585 Hz,
1000 Hz, 1170 Hz, 2000 Hz, 2340 Hz, 4000 Hz, 4680 Hz
Resolution: 100, 200, 400, 800, 1600, 3200, 6400 spectral lines
Control strategy: single channel control, weighted control, maximum
value, minimum value
Number of degrees of freedom (DOF): 12~3160
Clipping coefficient (sigma shear): 2~100
Stacking rate: None, 50%, 75%
Target spectrum
Crossover point: defined by magnitude or slope, the number of
crossover points is not limited
Crossover point calculation: Automatically calculate the crossover
frequency value of each segment.
Tolerance Spectrum: Define the alarm line and interrupt line in dB
or % relative to the target spectrum
Validity check: Automatically check the validity of the defined
intersection points
RMS tolerance limit: automatically calculated based on the
tolerance spectrum or manually set by the user.
RMS Calculation: Automatic calculation of displacement, velocity
and acceleration RMS values and estimated peak values.
RMS Adjustment: Adjust the RMS value manually or by setting the
decibel conversion.
Acceleration type: logarithmic, dB
Engineering Units: Imperial, Metric
Display: Automatically display the reference spectrum with
tolerance limits set according to the reference spectrum.
Pre-test
Pre-test level: 0.1~100%
Starting speed: fast, slow
Initial Drive: User Defined Initial Start Voltage
Maximum drive limit: User defined maximum drive voltage for
pre-test
Test run plan
Test Events: Magnitude and Dynamic Runtime
Interrupt checking: off, on
Control loop: open loop, closed loop
Store results: screen bitmap, active pane, all panes, automatically
store defined content
Generate test reports: simple report, full report
Pause experiment: set pause time
Loop: set the start and end of the loop and the number of loops
Run test sequence: switch and run multiple tests in sequence
Safety
Line interruption check: Automatically check the number of
out-of-tolerance lines and compare with the allowable value, the
line interruption rate is 0~1
Effective value limit: Check whether the effective value of the
control exceeds the set maximum and minimum limit
Manual abort: The user can stop the test by the "Stop" on the
control panel and the "ABORT" button on the front panel of the
control box
Run: The fastest way is to press "ABORT" to interrupt the test run
directly by hardware.
Vibration table limit values: maximum acceleration, velocity,
displacement.
Pre-test: Use small-scale signals to check the system control loop
and system performance, test the system transfer function, etc.
Test: Continuous automatic open-loop detection, overload
inspection, alarm, interruption tolerance band inspection, RMS
interruption limit inspection, start, stop and change magnitude at
the rate specified by the user, drive signal limit.
Floating target spectrum: When the magnitude changes, the target
spectrum, alarm, and interrupt tolerance follow the current
magnitude change, and automatically check the number of
out-of-tolerance lines in the current magnitude test
Open-loop sensitivity: insensitive, normal, sensitive.
Manual operation during the test
Run open actions: stop or start a test, pause or resume a test
Level adjustment: increase or decrease the level manually, or set
the level directly
Run jump: manually jump to the next event in the schedule
Run control operation: valid or invalid for interrupt detection,
control open-loop or closed-loop
Display operation: add/delete cursor, add/delete window, change
display content or interface, etc.
Test report: generate WORD/PDF test report
Peak/Valley Cursors: Automatic peak/valley detection and marking
Ordinary cursor: single cursor, double cursor, read the X, Y of the
position pointed by the cursor
Harmonic cursors: mark harmonics
Online status display
Key parameters: current magnitude, peak value of driving voltage,
target acceleration, velocity, displacement value and controlled
acceleration RMS value
Time: total running time, full scale time, current scale time,
remaining time
Current status: pause, pre-test, test run, alarm and test
interruption, etc.
Sine Performance Index
The VCS sine control system performs effective sine frequency sweep
and fixed frequency control by generating a 1Hz to 10000Hz
continuous sweep sine wave. The drive signal produces a true analog
sweep. The adaptive control algorithm based on the update of
sinusoidal signal amplitude can quickly respond to system changes,
and has high control precision and control dynamic range.
Control method
Equalization method: transfer function
Control loop: adaptive control based on sinusoidal signal amplitude
update, which can quickly respond to changes in system
nonlinearity, resonance vibration points and dynamic loads
Control performance
Dynamic range: 110dB
Closed loop time: 10ms
Drive signal: provides analog quality swept sine signal
Waveform distortion: <0.3%
Signal-to-noise ratio greater than 100 dB
Frequency resolution: 0.01%
Control parameters
Control strategy: single channel control, weighted control, maximum
value, minimum value
Operation mode: manual, automatic
Proportional filter bandwidth: proportional bandwidth, fixed
bandwidth
Displacement sensor - low pass filter: 0.1~18750Hz
Time domain resolution: ≥10ms
Starting rate: 1~120dB
Linear sweep frequency: 0.01~6000Hz/min
Logarithmic sweep frequency: 0.01~100 Oct/min,
Frequency range: 1Hz~10000Hz
Sweep parameters
Frequency sweep mode: linear, logarithmic
Sweep duration: frequency sweep times, time
Sweep rate: The sweep rate can be set for each sweep event
Initial direction: up, down
Frequency setting: lower limit frequency, lower limit frequency,
start frequency
Resident parameters
Frequency: set the frequency of dwell
Duration: number of sweeps, time
Target spectrum
Resolution: maximum 4096 points
Crossover point: defined by magnitude or slope, the number of
crossover points is not limited
Magnitude: acceleration, velocity, displacement
Slope: constant acceleration, constant velocity, constant
displacement
Tolerance Spectrum: Define the alarm line and interrupt line in dB
or % relative to the target spectrum
Validity check: Automatically check the validity of the defined
intersection points
Peak calculation: automatically calculate the peak value of
displacement, velocity and acceleration.
Engineering Units: Imperial, Metric
Display: Automatically display the reference spectrum with
tolerance limits set according to the reference spectrum.
Crossover point calculation: Automatically calculate the crossover
frequency value of each segment.
Acceleration type: logarithmic, dB
Start test
Starting speed: fast, slow
Initial Drive: User Defined Initial Start Voltage
Maximum Drive Limit: Rising maximum drive voltage for user defined
tests
Test run plan
Test events: sweep, dwell, step
Interrupt checking: off, on
Control loop: open loop, closed loop
Loop: set the start and end of the loop and the number of loops
Pause experiment: set pause time
Store results: screen bitmap, active pane, all panes, automatically
store defined content
Generate test reports: simple report, full report
Run test sequence: switch and run multiple tests in sequence
Manual operation during the test
Run open actions: stop or start a test, pause or resume a test
Level adjustment: increase or decrease the level by manual steps,
and you can also set the level directly
Frequency sweep control: change frequency, increase/decrease
frequency, change sweep direction, manual frequency setting
Sweep direction: change the sweep direction
Run Jump: Manually transfer to the next event in the schedule,
manually transfer to the next schedule
Run control operation: valid or invalid for interrupt detection,
control open-loop or closed-loop
Display operation: add/delete cursor, add/delete window, change
display content or interface report, etc.
Test report: generate WORD/PDF test report
Online status display
Key parameters: current magnitude, peak value of driving voltage,
target and controlled acceleration amplitude
Time: total running time, full scale running time, current scale
time, remaining time
Current status: pause, pre-test, test run, alarm and test
interruption, etc.
safety
Manual interruption: The user can stop the test run through the
"Stop" button on the control panel and the "ABORT" button on the
front panel of the control box. The fastest way is to press "ABORT"
to directly interrupt the test run through hardware.
Vibration table limit values: maximum acceleration, velocity,
displacement.
Test: Continuous automatic open-loop detection, overload
inspection, alarm, interrupt tolerance band inspection, start, stop
and change magnitude at the rate specified by the user, drive
signal limit.
Resonant Vibration Search and Dwell (RSTD)
VCS Resonant Vibration Search and Dwell provides the functions of
resonance search and dwell. The unique tracking algorithm of the
system can quickly and accurately track the resonance vibration
frequency. Harmonic vibration search and dwell includes all indexes
of sinusoidal control, and also includes the following indexes.
Resonance search
Transfer function: any pair of input channels, or a test between an
input channel and a control channel
Search range: user-selectable start and stop frequencies within the
frequency range defined by the reference spectrum
Sweep rate: default scan rate, user-specified dedicated scan rate
Detection criteria: resonance identification based on q value,
transfer function amplitude, or both
Reside
Test mode: two modes: 1) stay while resonant search; 2) after
completing the search, stay according to the stay list, this mode
allows the user to modify the stay list
Dwell mode: fixed frequency dwell, tracking dwell
Fixed frequency dwell time: time, number of cycles; or amplitude
drift rate
Tracking residence criteria: reaching the specified time or number
of cycles; resonance vibration frequency offset (frequency hz or
percentage); resonance amplitude deviation rate (total offset or
offset within a certain period of time)
Test run plan
Resonance search: define and execute resonance search events
Resonant dwell: define and execute dwell events, corresponding to
harmonic vibration search
Search dwell: execute dwell immediately after searching for the
resonance vibration point
Signal display
Search records: the same harmonic vibration search and dwell
related operation records
Dwell list: list all resident frequency points and corresponding
amplitude, phase, q value, etc.
Amplitude graph: transfer function amplitude vs. Frequency
variation curve
Phase diagram: the curve of transfer function phase versus
frequency
Safety
Manual interruption: The user can stop the test run through the
"Stop" button on the control panel and the "ABORT" button on the
front panel of the control box. The fastest way is to press "ABORT"
to directly interrupt the test run through hardware.
Vibration table limit values: maximum acceleration, velocity,
displacement.
Test: Continuous automatic open-loop detection, overload
inspection, alarm, interrupt tolerance band inspection, start, stop
and change magnitude at the rate specified by the user, drive
signal limit.
Typical Shock Control
The typical shock control provides the shock test function of the
classic shock waveform, adopts the adaptive control algorithm based
on the transfer function, can quickly respond to the nonlinearity
of the system and the change of the dynamic load, and has strong
system adaptability and high control precision.
Control method
Equalization method: transfer function
Control loop: adaptive control based on transfer function update,
which can quickly respond to the nonlinearity of the system and the
change of dynamic load
Control performance
Dynamic range: 90dB
Pulse definition
Pulse type: half sine, front peak sawtooth, back peak sawtooth,
triangle, rectangle, trapezoid, haversine.
Pulse duration: 0.5~3000ms
Pulse amplitude: the user can input the pulse amplitude according
to the needs
Frequency range: 0~18750 Hz
Unit: imperial, metric
Pulse compensation
Compensation method: front and rear pulse compensation, front pulse
compensation, post pulse compensation
Compensation waveform: half sine, rectangular, rectangular harmonic
Pre-pulse amplitude: 1~100%
After pulse amplitude: 1~100%
Tolerance
Type: MIL-STD810G, IEC60068227, GJB150A, ISO standard, user-defined
interrupt control limit.
Control parameters
Operation mode: manual, automatic
Control channel: single channel control, weighted control
Pulse Interval: Defines the time interval between two pulses
Average: 1~10
Pre-test
Pre-test level: 0.1~100%
Starting speed: fast, slow
Initial Drive: User Defined Initial Start Voltage
Maximum drive limit: User defined maximum drive voltage for
pre-test
Test Plan Run
Test events: magnitude and number of pulses
Interrupt checking: off, on
Control loop: open loop, closed loop
Store results: screen bitmap, active pane, all panes, automatically
store defined content
Generate test reports: simple report, full report
Pause experiment: set pause time
Loop: set the start and end of the loop and the number of loops
Pulse polarity: forward, reverse
Safety
Open loop detection: automatic detection of control loop open loop
Input signal: input channel open loop, overload check
Line interruption check: Automatically check the number of
out-of-tolerance lines and compare with the allowable value, the
line interruption rate is 0~1
Tolerance: MIL-STD810 (US military standard), ISO standard,
user-defined interrupt control limit.
Interrupt button: interrupt test run directly via hardware
Shaker Limits: Maximum Acceleration, Velocity, Displacement
Drive signal limit: limit the peak value of the drive signal
Open-loop sensitivity: insensitive, normal, sensitive.
Manual operation during the test
Run open actions: stop or start a test, pause or resume a test
Magnitude adjustment: manually step to increase or decrease the
magnitude, directly set the magnitude
Run Jump: Manually adjust to the next event in the schedule
Run control operation: valid or invalid for interrupt detection,
control open-loop or closed-loop
Display operation: add/delete cursor, add/delete window, change
display content or interface report, etc.
Test report: generate WORD/PDF test report
Shock pulse: output shock pulse manually, change pulse polarity
Online status display
Key parameters: current magnitude, peak value of drive voltage,
target and controlled acceleration peak value and RMS value
Time: the number of output pulses, the number of remaining pulses,
the number of current level pulses, the number of full level pulses
Current status: pause, pre-test, test run, alarm and test
interruption, etc.
