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HVE and HVE-2D Version 7 Available August 1, 2009
(updated August 13, 2009)

Status of Version 7.00
- - Now Available

Scheduled Release Date - - August 1, 2009

Engineering Dynamics Corporation announces the availability of HVE & HVE-2D Version 7. This release is the third update of 2009 and contains many new features and capabilities designed to help safety researchers and accident reconstructionists study real-world issues related to motor vehicle safety. The Summer 2009 edition of the EDC Technical Newsletter introduces the new features in Version 7, including:

Distance Tool - Want to know the distance between two vehicles? Just turn on the Distance Tool and click on the front of one vehicle and the rear of the other. A green sphere appears at the From point, a red sphere appears at the To point and the dialog reports the distance between them. Want to calculate trailer off-tracking? Turn on the Tire Tracks option and the Distance Tool, then zoom in and click on the tracks to display the distance as shown in the image below. You can also directly enter From and To coordinates in the dialog to determine the distance.

Enhancements to EDCRASH - EDCRASH now replaces your old skid-to-stop program with an easy-to-use visual approach. Simply place a vehicle at the start and end of its path and EDCRASH calculates the initial velocity. This new feature takes users beyond the simplistic formula for straight-line skid-to-stop calculations. By placing vehicles at additional locations along the path, EDCRASH also handles a vehicle that spins, travels a curved path and/or rolls out to its final/rest position. EDCRASH can also handle partial braking effects, because the user can assign unbalanced braking and steering conditions at each wheel. The speed may also be corroborated by a trajectory simulation. Try it out! 

Vehicle Wizard - Users can now quickly modify the basic Inertial and Dimensional Properties for a Generic Vehicle as it is added to the Vehicle Editor. The Vehicle Wizard is a new feature located on the Vehicle Information dialog, and is available at the press of a button. The Vehicle Wizard provides an excellent template for quickly assigning vehicle dimensions, weights and weight distribution.

As shown in the Vehicle Wizard dialog to the right, the data are requested in a traditional format (e.g., Wheelbase, Front/Rear Weight Distribution, Weight on Front Axle and Weight on Rear Axle). The user makes the necessary adjustments to the data and then presses OK to update the current vehicle information as it is added to the Vehicle Editor.

While aimed directly at HVE-2D users, all users will find the Vehicle Wizard is a real timesaver!

HVE Driver, Speed Follower Model - SIMON users can now take advantage of this long awaited enhancement to the HVE Driver Model. When assigning target positions for the Path Follower, simply assign a Total Velocity at each position in order to use the Speed Follower. SIMON will then determine the throttle and/or brake applications required to maintain the desired speed. The speed, just like the path, is determined using spline interpolation between target positions and velocities. The parameters that control the Speed Follower are found on the Speed tab in the HVE Driver Controls dialog. The main control parameters (i.e., the parameters that define how quickly the pedals are applied and released) are the Throttle and Brake Correction Rates. A great example of using this new capability is shown in an image from a Passing Maneuver scenario shown below:

Automatic Transmission - The Transmission dialog now not only displays the gear ratios of the transmission, but also a Type selector for Manual or Automatic. If you select Automatic, SIMON automatically determines the correct gear at the start of your simulation according to the user-entered Initial Velocity, then shifts the transmission accordingly. In general, shifting is controlled according to engine speed and throttle position, exactly like a real automatic transmission.

When engine speed exceeds a certain value (typically 80% of maximum engine speed) or the throttle position drops below a certain value (typically 25 to 65% WOT, depending on engine speed) an upshift occurs as indicated by the red line in the Shift Points graph. Alternatively, when engine speed drops below a certain value (typically 20% greater than minimum engine speed) or the throttle position exceeds a certain value (typically 60 to 90% WOT, depending on engine speed) a downshift occurs, as indicated by the green line in the Shift Points graph.

More details regarding the HVE Automatic Transmission model are included in the Summer 2009 Newsletter Technical Session.

New Camera Paradigm - This is awesome! The toolbar now includes a Camera button next to a dropdown list of user-defined camera views. If you manipulate the viewer, the view name changes to Current (Untitled) View. Move around all you want, and when you click on the dropdown list and choose a saved view, you go right to that view. To add views to the list, click the Camera button to use the Set Camera dialog, then edit the desired View From and Look At settings and then Save the view with a descriptive name, such as Ford Driver's View, or Pedestrian Looking at Truck.

Tire Skid Width - When a tire skids, the width of the resulting tire mark naturally depends on the width of the tire. But what if the vehicle is sliding sideways, where the tire slip angle is 90 degrees? The width of the tire mark would then be the length of the contact patch. What if the tire has an inclination angle with respect to the terrain? If the tire is inclined sufficiently, the entire width of the tread surface is no longer in contact with the terrain, so the width of the resulting tire mark is reduced. HVE now takes all of these factors into account when a skidmark is displayed as shown below in the illustrative EDSMAC4 simulation of a spinning vehicle.

Special Introductory Pricing is now being offered for HVE and HVE-2D Version 7. For details, contact EDC Sales or call 503.644.4500.

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