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Users Manual for Program TRC_STRIX_TRACK  

Table of Contents

Introduction

Program trc_strix_track transforms files recorded by the STRIX-recording car into files written in TRAX-format. The format of the STRIX-recordings shall be of type SRA.

Calculation procedure

• Read column number 7 in the STRIX-file, and add an X-axis starting at 0(zero).
• And the value 1435 to the gauge.
• Filter the gauge by a lowpass filter at 1.5 [m] cut-off wave length.

• Read column number 11 and 14 in the STRIX-file containing the long wave vertical errors for the left and right side respectively.
• Add X-axis to the vertical errors starting at 0(zero).
• Calculate the average value of the two sides.
• Change sign of the vertical average value.
• Shift vertical irregularities 255 [m] forward, in order to make them in phase with gauge irregularities.
• Filter the vertical irregularities by a lowpass filter at 1.5 [m] cut-off wave length.

• Read column number 8 in the STRIX-file containing the cant irregularities.
• Add X-axis to the vertical errors starting at 0(zero).
• Shift the irregularities 63.25 [m] forward, in order to make them in phase with gauge irregularities.
• Filter the cant irregularities by a highpass filter at 50 [m] cut-off wave length.
• Filter the cant irregularities by a lowpass filter at 1.5 [m] cut-off wave length.

• Read column number 18 and 21 in the STRIX-file containing the long wave lateral errors for the left and right side respectively.
• Add X-axis to the lateral errors starting at 0(zero).
• Calculate the average value of the two sides.
• Change sign of the lateral average value.
• Shift lateral irregularities 255 [m] forward, in order to make them in phase with gauge irregularities.
• Filter the curvature irregularities by a lowpass filter at 100 [m] cut-off wave length.
• Calculate lateral track irregularities due to designed curvature of the track.
• Remove lateral track irregularities due to designed curvature from the long wave lateral errors.
• Filter the lateral irregularities by a highpass filter at 200 [m] cut-off wave length.
• Filter the lateral irregularities by a lowpass filter at 1.5 [m] cut-off wave length.

• Read column number 15 in the STRIX-file containing the curvature.
• Add X-axis to the vertical errors starting at 0(zero).
• Shift the curvature 66.5 [m] forward, in order to make it in phase with gauge irregularities.
• Filter the curvature by a lowpass filter at 100 [m] cut-off wave length.
• Write the result to file ucat_work/1R_track.

• Read column number 8 in the STRIX-file containing the cant irregularities.
• Add X-axis to the vertical errors starting at 0(zero).
• Shift the irregularities 63.25 [m] forward, in order to make them in phase with gauge irregularities.
• Filter the cant irregularities by a lowpass filter at 50 [m] cut-off wave length.
• Divide the irregularities by 1500, in order to obtain the cant angle in radians.
• Write the result to file ucat_work/fi_track.

• Divide the lowpass filtered cant irregularities by 2.
• Write the result to file ucat_work/z_track.

Input data

Input data is read in free format, valid separators between the input values are <space>, <comma>, <tab>, <equal sign> or <carriage return>. The commands can be written both in lower and upper case letters. The operation of the program is controlled by the commands described below; some of the commands also need arguments.

INFIL

STRIX-file in SRA-format.
Declared = Character*132    Default = Blank

UTFIL

Result file written in TRAX_WDESIGN-format.
Declared = Character*132    Default = trc_strix_track_UTFIL.trax_wdesign

VEHICLE_DIRECTION

Definition of leading end of the vehicle.
Declared = Character*1    Default = A

REMOVE_UCAT_WORK

Command which controls if the working directory "ucat_work" should be removed or not after the calculation.
Declared = Character*4    Default = 'NO'

XSTART_KM

Defines the first kilometer from where the translation shall begin. Valid values can be obtained from program trc_strix_test.
Declared = Real*4    Default = 0

XSTART_M

Defines the meter within the first kilometer from where the translation shall begin. Valid values can be obtained from program trc_strix_test.
Declared = Real*4    Default = 0

XSTART_UTFIL

Defines the meter where the output file shall begin.
XSTART_UTFIL must not be bigger than 1.e5 or less than -1.e5, because program trc_strix_track is written in single precision.
Declared = Real*4    Default = XSTART_KM*1000 + XSTART_M

XSTOP_KM

Defines the last kilometer where the translation shall end. Valid values can be obtained from program trc_strix_test.
Declared = Real*4    Default = 1000

XSTOP_M

Defines the meter within the last kilometer where the translation shall end. Valid values can be obtained from program trc_strix_test.
Declared = Real*4    Default = 0

Example of an input data file

Following example: Master.trc_strix_trackf can be used as a master file:

                                                        
 ##                                                     
 ##      Input data for program trc_strix_track         
 ##                                                     
   INFIL = 85251257.sra                                 
 #                                                      
   VEHICLE_DIRECTION= A                                 
 #                                                      
   REMOVE_UCAT_WORK= yes                                
 #                                                      
   XSTART_KM= 1   XSTART_M= 808                         
   XSTOP_KM = 3   XSTOP_M =  60                         
 #                                                      
   UTFIL = 85251257.trax                                
 # XSTART_UTFIL= 0