TBTQ1

TETQ1

TINCQ1

NTBLQ1

PCTOP1

VARINC

8

Card:  Field

Variable

Description

Original

Units

Default

Units

Metric Units

Braking/Tractive Force Table Inputs for V1

The control inputs for  vehicle braking/tractive force for vehicle No. 1 are entered as time history tables of Force as a function of time on card(s) 8. The first card for each torque input table is the table header card which describes the size and format for the input Force tables to follow. The inputs can also optionally be specified as % drag.

PLEASE NOTE: If the magnitude of all table inputs are ≤|1.0| , then the inputs are automatically assumed to be %.

Lbs

%

8:1

TBTQ1

Initial time for V1's braking or accelerating inputs.

seconds

8:2

TETQ1

End time for V1's inputs for Vehicle 1.

seconds

8:3

TINCQ1

Time increment for braking or tractive force inputs for V1. One value for Force is input  for each increment, so the size of TINCQ determines the detail with which braking and traction can be described by the mathematical model. 

NOTE: If field 6 (VarInc1, Option Variable increment input) is set=1, then the definition of this variable is for the number of table inputs. Maximum 50.

Seconds

8:4

NTBLQ1

Normally = 0.0. If < 0.0, the program reads in and ignores the torque tables included following card #8.  (This option is to permit de-activating tables without having to delete the data in the tables.)

8:5

PCTOP1

(optional) Set =1.0, to indicate percentage drag lockup specification option. For convenience, an option has been added to m-smac to permit the specification of the drag on the wheels as a percentage (%), where -1.0 is fully locked, 0.0 is free rolling. PLEASE NOTE: If the magnitude of all table inputs are ≤|1.0| , then the inputs are automatically assumed to be %

8:6

VARINC

(default) If=0.0, table is assumed a fixed increment table

(optional) If =1.0, flag to indicate Variable time increment inputs. Field 4 is then used to indicate the number of table inputs.

(optional) If=2.0, flag to indicate Variable time increment inputs AND the 1^st two entries in the table are for pre-impact and post-impact. The 1^st value is applied until impact is detected and then the value is changed to the 2^nd value over the time difference between the two entries.

The Table Header card is followed by tables containing the values for the braking or tractive force for Vehicle No. 1: RF, LF, RR &  LR tires  (and RRR & LRR for trailer option), one set of values per card,  and up to 50 table values.

The format for the tables is as follows:

(n is a sequence number starting at 1)

Time

RF1

LF1

RR1

LR 1

RRR1

LRR1

n

8