Real time vehicle simulation system

• US 4,952,152 A
• Filed: 06/19/1989
• Issued: 08/28/1990
• Est. Priority Date: 06/19/1989
• Status: Expired due to Term

• Current Assignee: Rockwell Collins Simulation and Training Solutions, LLC
• Original Assignee: Evans & Sutherland Computer Corp. (Elevate Entertainment, Inc.)
• Inventors: Briggs, John A., Haug, Edward J., Deyo, Roderic C.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): Doyle, J. L.
• Application Number:
  US07/368,000
• Time in Patent Office: 435 Days
• Field of Search: 434/69, 434/38, 434/28, 434/62, 434/29, 434/30, 434/37, 434/11, 434/16, 434/26, 358/104, 364/578, 273/311, 273/312, 272/72, 272/73, 272/DIG. 6
• US Class Current: 434/69
• CPC Class Codes: G06F 30/15 Vehicle, aircraft or watercraft design
• CPC Class Codes: G06F 30/23 using finite element methods [FEM] or finite difference methods [FDM]
• CPC Class Codes: G09B 9/05 the view from a vehicle being simulated G09B9/052, G09B9/058 take precedence

Abstract

To accommodate computer graphics delays, the future position and orientation of a simulated vehicle are predicted in an operating sequence by separate coordinated models that are fed data signals indicating the operator'"'"'s control actions. The control actions are extrapolated to provide further data signals. A suspension model and a nonlinear chassis model operate sequentially with a road model to provide one reference-state input to a prediction model. Other inputs to the prediction model are from the drive train and steering extrapolation units controlled by driver inputs.

Claims

1. A system for use by a driver to simulate a vehicle in real time, comprising:

control means actuable to provide control signals representative of control actions for the simulated vehicle;

vehicle simulation model means coupled to receive said control signals and responsive to provide representative positional signals indicative of the positional state of the simulated vehicle;

vehicle prediction model means coupled to receive said control signals and said representative positional signals, said vehicle prediction model means for predicting from said representative positional signals and said control signals to provide predicted positional signals indicative of a future positional state of the simulated vehicle; and

reaction display means responsive to said predicted positional signals for manifesting a positional state of said vehicle to said driver, wherein the future predicted positional signals substantially compensate for the inherent response time delay of said display means.

2. A system according to claim 1 wherein said vehicle simulation model comprises a suspension model unit and a chassis model unit.

3. A system according to claim 2 wherein said vehicle suspension model unit is a nonlinear unit.

4. A system according to claim 2 wherein said chassis model unit is a nonlinear unit.

5. A system according to claim 2 wherein said vehicle simulation model further includes a road model for simulating operating conditions for said vehicle.

6. A system according to claim 1 wherein said vehicle simulation model further includes a road model for simulating operating conditions for said vehicle.

7. A system according to claim 1 wherein said reaction means comprises a display system for manifesting a positional state of said vehicle as a visual scene.

8. A system according to claim 1 wherein said vehicle simulation model means incorporates nonlinear operating elements.

9. A system according to claim 1 wherein said reaction means comprises a graphics display apparatus.

10. A system according to claim 9 wherein said graphics display apparatus comprises a sequential frame display unit to provide a dynamic display.

11. A system according to claim 10 wherein said vehicle prediction model provides predicted positional signals at least four sequential display frames in advance of said position signals.