IMV K2 Manuel utilisateur

Random Vibration Control System

K2Sprint

RANDOM

Instruction Manual

IMV CORPORATION

ULimitation of K2Sprint/RANDOM

･Maximum numbers of usable input channel are ‘2’ channels.

･Option of LIMIT CONTROL can not be added.

Type of Document : Instruction Manual

System Applied : K2/K2Sprint

Software < RANDOM, SOR/ROR > Later than Version 20.1.0

Japanese Edition

Version Date Contents

1.0.0 2004.01.30 First edition

1.0.1 2004.04.02 Correction of a misprint

2.0.0 2004.08.10 Additional descriptions of Simplified Definition, and Level Schedule function.

3.0.0 2005.03.31 Additional description of “Transmissibility display unit”, “Excitation level

mode” in Setup and “Observation freq. can be set within the Reference freq.

range”.

3.0.1 2008.01.18 Correction of a misprint

3.1.0 2008.12.17 Additional description of CSV data file.

6.0.0 2010.10.21 Applied to Windows7

6.1.0 2011.09.26 Additional description of “Minimum value control”

6.2.0 2012.02.29 Additional description of level selection for periodical saving file of Data save

conditions

10.0.0 2013.08.09 Renewal of screen display, modification of the upper limit of the number of

control lines, addition of amplitude probability density to the data to display,

modified description of test files, additional description of input channels and

additional description of operation settings (display config for operation)

13.5.0 2017.06.27 Additional description of ‘Response data save’ in Setup, additional description

of loop check detailed settings

14.0.0 2018.01.31 Additional description of ‘Extended random on random option’, addition of

amplitude probability density analysis

14.1.0 2018.04.27 Additional description of Measured waveform definition

14.3.0 2019.04.19 Additional description of “Safety check”, modified description of Data save

condition, correction of misprints

14.3.1 2019.06.18 Modified description of “High Pass Filter(HPF)”

14.5.0 2019.12.27 Additional description of ‘Soft-Clipping option’ and ‘Aux Output’

20.1.0 2021.01.28 Additional description of ‘Pause before transitioning to "In excitation"’ of

‘Fundamental/Control Condition’ and ‘Reset timer at 0dB’ of ‘Data Save

Condition’.

Additional description of ‘Clear history at operation start’ and ‘Set the data

file name automatically’ of ‘Set up’.

Correction of a misprint.

English Edition

Version Date Contents

1.0.1 2004.04.02 First edition, Correction of a misprint

2.0.0 2004.08.19 Additional descriptions of Simplified Definition, and Level Schedule function.

3.0.0 2005.04.06 Additional description of “Transmissibility display unit”, “Excitation level

mode” in Setup and “Observation freq. can be set within the Reference freq.

range”.

3.0.1 2008.01.18 Correction of a misprint

3.1.0 2010.02.25 Additional description of CSV data file.

6.0.0 2010.11.05 Applied to Windows7

6.1.0 2011.09.26 Additional description of “Minimum value control”

6.2.0 2012.02.29 Additional description of level selection for periodical saving file of Data save

conditions

10.0.0 2013.08.09 Renewal of screen display, modification of the upper limit of the number of

control lines, addition of amplitude probability density to the data to display,

modified description of test files, additional description of input channels and

additional description of operation settings (display config for operation)

13.5.0 2017.10.02 Additional description of ‘Response data save’ in Setup, additional description

of loop check detailed settings

14.0.0 2018.01.31 Additional description of ‘Extended random on random option’, addition of

amplitude probability density analysis

14.1.0 2018.04.27 Additional description of Measured waveform definition

14.3.0 2019.04.19 Additional description of “Safety check”, modified description of Data save

condition, correction of misprints

14.3.1 2019.06.18 Modified description of “High Pass Filter(HPF)”

14.5.0 2019.12.27 Additional description of ‘Soft-Clipping option’ and ‘Aux Output’

20.1.0 2021.01.28 Additional description of ‘Pause before transitioning to "In excitation"’ of

‘Fundamental/Control Condition’ and ‘Reset timer at 0dB’ of ‘Data Save

Condition’.

Additional description of ‘Clear history at operation start’ and ‘Set the data

file name automatically’ of ‘Set up’.

Correction of a misprint.

CONTENS

Chapter 1 Outline of the System........................................................... 1-1

1.1 Specifications .................................................................... 1-1

1.1.1 RANDOM ...................................................................... 1-1

1.1.2 Sine On Random (Option of RANDOM) ........................................... 1-3

1.1.3 Random On Random (Option of RANDOM) ......................................... 1-4

1.1.3.1 Extended Random On Random (Option of Random On Random) ................ 1-5

1.1.4 PSD Limit (Option of RANDOM) ................................................ 1-5

1.1.5 Non Gaussian (Option of RANDOM) ............................................. 1-5

1.1.6 Soft-Clipping (Option of RANDOM) ............................................ 1-6

Chapter 2 Operation System of K2 Application.............................................. 2-1

2.1 Outline ........................................................................... 2-1

2.2 Test File ......................................................................... 2-2

2.3 Test Type ......................................................................... 2-3

Chapter 3 Basic Operation................................................................. 3-1

3.1 Random Test ....................................................................... 3-1

3.2 Simplified Definition ............................................................. 3-22

Chapter 4 Test Definition................................................................. 4-1

4.1 Outline ........................................................................... 4-1

4.2 Fundamental/Control Condition ..................................................... 4-2

4.2.1 Frequency range fmax ........................................................ 4-2

4.2.2 Control frequency lines ..................................................... 4-2

4.2.3 Max. Observation Frequency (Max. Observation Freq.) ......................... 4-3

4.2.4 Controlled variable ......................................................... 4-3

4.2.5 Averaging Parameters ........................................................ 4-4

4.2.6 Equalization Mode ........................................................... 4-5

4.2.7 Loop check .................................................................. 4-5

4.2.7.1 Ambient noise upper limit ............................................. 4-6

4.2.7.2 Transmissibility check value [in initial excitation] .................. 4-6

4.2.7.3 Transmissibility check value [in test operation] ...................... 4-7

4.2.7.4 Overload check value .................................................. 4-7

4.2.8 Test time ................................................................... 4-7

4.2.9 Initial output level ........................................................ 4-7

4.2.10 Level increment ............................................................ 4-8

4.2.11 Auto-start ................................................................. 4-8

4.2.12 Shutdown time .............................................................. 4-8

4.2.13 Level Scheduling ........................................................... 4-9

4.2.13.1 Level ................................................................ 4-10

4.2.13.2 Time ................................................................. 4-10

4.2.13.3 Tolerance Enlarge.................................................... 4-10

4.2.14 Observation freq. can be set within the Reference freq. range .............. 4-11

4.2.15 Pause before transitioning to "In excitation" .............................. 4-11

4.3 Excitation System Setting ......................................................... 4-12

4.3.1 Initial output voltage ...................................................... 4-12

4.3.2 Clipping.................................................................... 4-12

4.3.2.1 Clipping by crest factor.............................................. 4-12

4.3.2.2 Output voltage limit value............................................ 4-13

4.3.2.3 Abort Ratio........................................................... 4-13

4.3.3 High Pass Filter(HPF) ....................................................... 4-14

4.4 Control Reference ................................................................. 4-15

4.4.1 PSD definition .............................................................. 4-15

4.4.1.1 Break Point PSD Definition............................................ 4-16

4.4.1.1.1 Outline ........................................................ 4-16

4.4.1.1.2 Frequency ...................................................... 4-17

4.4.1.1.3 Level .......................................................... 4-17

4.4.1.1.4 Slope .......................................................... 4-18

4.4.1.1.5 rms change ..................................................... 4-18

4.4.1.2 Measured PSD Definition............................................... 4-19

4.4.1.2.1 Outline ........................................................ 4-19

4.4.1.2.2 PSD Data File Load ............................................. 4-20

4.4.1.2.3 PSD Data Processing ............................................ 4-21

4.4.1.2.3.1 LPF (Low Pass Filter) .................................... 4-21

4.4.1.2.3.2 HPF (High Pass Filter) ................................... 4-22

4.4.1.2.3.3 Level Change ............................................. 4-23

4.4.1.2.3.4 rms change ............................................... 4-24

4.4.1.2.4 CSV data file .................................................. 4-24

4.4.1.3 Measured Waveform definition.......................................... 4-25

4.4.1.3.1 Outline ........................................................ 4-25

4.4.1.3.2 Waveform Data File loading ..................................... 4-26

4.4.1.3.3 Data edit ...................................................... 4-29

4.4.1.3.3.1 Filtering ................................................ 4-29

4.4.1.3.3.2 Edging ................................................... 4-31

4.4.1.3.3.3 Scalar calculation ....................................... 4-33

4.4.1.3.3.4 Data length change ....................................... 4-35

4.4.1.3.4 CSV data file .................................................. 4-38

4.4.2 Tolerance Definition ........................................................ 4-39

4.4.2.1 Tolerance............................................................. 4-40

4.4.2.2 Define the alarm line................................................. 4-40

4.4.2.3 Use the lower limit line.............................................. 4-40

4.4.3 RMS Check ................................................................... 4-41

4.5 Input Channel ..................................................................... 4-42

4.5.1 Outline ..................................................................... 4-42

4.5.2 Input Channel ............................................................... 4-42

4.6 Data Save Condition ............................................................... 4-43

4.6.1 Outline ..................................................................... 4-43

4.6.2 Saving Condition ............................................................ 4-44

4.7 Amplitude probability density analysis............................................. 4-45

4.7.1 Outline ..................................................................... 4-45

4.8 Operation Status .................................................................. 4-46

4.9 Safety check ...................................................................... 4-48

4.9.1 Outline ..................................................................... 4-48

4.10 Aux. Output ...................................................................... 4-50

4.10.1 Outline .................................................................... 4-50

4.10.2 Fundamental Operation Example .............................................. 4-50

Chapter 5 Message and Meanings............................................................ 5-1

5.1 K2 Random Error Message ........................................................... 5-1

Chapter 6 Supplemental Explanation........................................................ 6-1

6.1 Set Up ............................................................................ 6-1

6.2 Manual Operation .................................................................. 6-4

1 - 1

Chapter 1 Outline of the System

1.1 Specifications

1.1.1 RANDOM

(1) Control method : PSD control of the random waveform signal with the Gaussian nature

by using the feed-forward method

(2) Control frequency fmax : Maximum 20 kHz (However, it may be limited by conditions.)

(3) Number of control lines L : Maximum 25600 lines (However, it may be limited by conditions.)

(4) Control dynamic range : More than 94 dB

(5) Loop time : 200 ms（120 DOF, fmax=2000 Hz, L= 400 line）

(6) Input channel

1) Number of channels : Maximum 64

2) Channel type : Control channel / Monitor channel(possible to duplicate)

3) Control response averaging method : Average value control / Maximum value control /

Minimum value control

4) Alarm / Abort : For each input channel, the maximum allowance spectrum data (PSD)

or RMS value can be specified for setting of Alarm / Abort.

5) Limit control function : For each input channel, the maximum allowance spectrum data (PSD)

or/and RMS value can be specified. When the response exceeding

over the specified spectrum can be forecasted to be produced at the

concerning channel, the system controls the concerning spectrum not

to produce the exceeded response over the allowance and continues

the testing operation without stopping (however, the linearity of the

controlled system is assumed for the above forecasting). Optional

function of ‘PSD Limit’ is necessary to execute the operation as in the

above by using PSD data.

(7) Output channel

1) Number of channels : 1

2) Clipping : Voltage value (specifying by σcan also be added.)

(8) Analysis / Display data

1) Reference, Controlled response PSD and Tolerance

2) PSD of each input channel, Waveform data

3) Drive spectrum

4) Transmissibility : Controlled system transmissibility (control response / drive)

Transmissibility between input channel and drive

Transmissibility between input channels (amplitude, phase)

5) PSD for Monitoring, Limit control execution ratio

6) Amplitude probability density of each control channel and drive

1 - 2

(9) Data save : Automatic / Manual

Display data save as CSV format

(10) Control operation information save and use

1) Storing of the test operation time information and continuing of test operation

(Partial execution of the test)

2) Storing the control information (Live data in operation) and continuing of the control

(Prompt mode)

(11) Option : PSD Limit

Sine On Random

Random On Random

Extended Random On Random

Non Gaussian

Soft-Clipping

1 - 3

1.1.2 Sine On Random (Option of RANDOM)

(1) Specification for Broad band

Based on K2/RANDOM (However, ‘(3) Special mention for SOR’ should be referred to.)

(2) Specification for Narrow band

1) Control method : Based on K2/SINE

2) Base narrow band to be defined : 1

3) Number of higher harmonics in base narrow band to be defined : 32

4) Definition of base narrow band

①Base reference components : specify by level and frequency

②Sweep direction : Log sweep / Linear sweep / Sweep hold

③Sweep rate : [octave / min] (Log sweep) / [Hz/sec] (Linear sweep) / [min/Single-

Sweep]

④Specifying of break point : possible

5) Definition of each higher harmonic component

①Specifying of Level (Level ratio) : possible

②Specifying of Frequency (Frequency ratio) : possible

③Specifying of Phase for Output sine waveform : possible

④Specifying of Tolerance : possible

6) Test time : Sweep cycle of narrow band reference / Infinite / Times

7) Sweep hold / Reverse / Skip / Pause of narrow band : possible

8) Specifying of Sweep pause time : possible

9) Specifying of Sweep start frequency : possible

10) Specifying of Upper / Lower sweep frequency : possible

(3) Special mention for SOR

1) Specifying of Test time : based on the test time of narrow band

2) Level scheduling function : impossible

3) Observing by Observation profile and Limit control : Available only in broad band

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