Time Distance – Acc~Dec
Overview: Computes detailed information on the Speed, Distance and Time of an Acceleration-Transition-Deceleration event.
Entry into Module:
This module of the program is normally entered by clicking on the REC-TEC block in the upper left of the REC-TEC Window causing the drop-down menu to appear. Place the cursor on the Time - Distance block and click on Time - Distance (Acc~Dec) on the sub-menu to initiate this module.
Under certain circumstances, the user may choose to use the Files block instead of the drop-down menu approach. Selecting any file with a .ATD extension in the Dialog box accessed from either the Open Single File or Open Multiple Files block opens this module.
Selecting AutoLoad [ON] from either the Setup Menu or the AutoLoad Icon on the upper right side (third line) of the REC-TEC Window automatically loads the scenario that was on the screen when the module was closed, either individually, or when the program was closed. With AutoLoad [OFF] on the main REC-TEC Window, modules will start without loading a file.
This module contains the following data entry blocks within the leftmost frame:
· Speed (Initial) – Speed at start of maneuver
· fa (Acc) – Acceleration factor
· Time (trn) – Transition time
· f (Trn) – Deceleration factor during Transition (rolling resistance)
· f (Dec) – Deceleration factor
· Speed (Final) – Speed at end of maneuver
· Distance (T) – Total Distance of maneuver
Entry of variables in the data boxes is sufficient to generate a solution and causes output information to appear in the Output frame. As the input data is changed, the output data is automatically updated without the need to tell the program to update the output.
The output from this module consists of the repeated input variables plus the times and distances required to complete the maneuver in the distance specified using the input Transition time.
Several Command Buttons appear in a frame located at the lower right corner of the module Window. The Command Buttons allow the user to engage options including the option to Open and Save the data required to generate the scenario shown on the screen at the time the file was saved.
· Open .ATD File – Calls up a Dialog box, which Opens any pre-existing .TDD file and displays the output results.
· Save .ATD File – Calls up a Dialog box, which Saves data on the screen to files with any user-selectable filenames. This is independent of the automatic saving as “LastFile.ATD” of the data at the close of this module or the close of the program.
· Graphics – Toggles the graphics curves for Time (with scales) on the upper half and Distance (with scales) on the lower half of the screen. The right and left scales show the Speed.
· N – This button toggles a graphical number pad on the screen that can be used to enter data into the input boxes without using your keyboard number pad. This may be useful for presentations as data entry can be accomplished using a wired/wireless mouse.
· Iteration / FDA Menu – Calls up a frame that permits the user to input the minimum and maximum values for selected input variables along with the interval for Iteration. If Finite Difference Analysis (FDA) is selected, the resulting analysis computes the uncertainty level for the specified range of the input variables.
For a more in-depth description of Finite Difference Analysis, see the Finite Difference Analysis Section of this Manual – Press [F2] from any Active module of the program.