This subroutine defines a user - defined differential equation.
|
Language type |
SubRoutine |
|
FORTRAN |
differential_usub (time,upar,npar,jflag,iflag,result) |
|
C/C++ |
differential_usub (double time, double upar[], int npar, int jflag, int iflag, double result) |
Parameter information
|
Variable Name |
Size |
Description |
|
time |
double |
Current simulation time of RecurDyn/Solver. |
|
upar |
double[30] |
Parameters defined by the user. The maximum size of array is 30. |
|
npar |
int |
Number of user parameters. |
|
jflag |
int |
When RecurDyn/Solver evaluates Jacobian, the flag is true. Otherwise, the flag is false. |
|
iflag |
int |
When RecurDyn/Solver makes its initial call to this routine, the flag is true. Otherwise, the flag is false |
|
result |
double |
Returned force and one-dimensional variable |
Example
Figure 1 Moter model using a Differential Equation User Subroutine as Motion
Note
If the user wants to run this model using a user subroutine, the user can refer it in the directory (<install dir>/Help/usub/**).