MIL-STD810G Water Cooled Electromagnetic Vibration Testing Machine

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

Introduction of Product technology and function

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.