Method and systems for off-line control for simulation of coupled hybrid dynamic systems

• US 9,477,793 B2
• Filed: 04/05/2013
• Issued: 10/25/2016
• Est. Priority Date: 10/02/2008
• Status: Active Grant

• Current Assignee: MTS Systems Corporation (Illinois Tool Works Inc.)
• Original Assignee: MTS Systems Corporation (Illinois Tool Works Inc.)
• Inventors: Fricke, David M.
• Primary Examiner(s): Toatley, Gregory J
• Assistant Examiner(s): DALBO, MICHAEL J
• Application Number:
  US13/857,300
• Publication Number:
  US 20130304441A1
• Time in Patent Office: 1,299 Days
• Field of Search: 702/113
• US Class Current: 1/1
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence
• CPC Class Codes: G01M 17/0074 Details, e.g. roller construction, vehicle restraining devices
• CPC Class Codes: G01M 17/027 using light, e.g. infrared, ultraviolet or holographic techniques
• CPC Class Codes: G01M 17/04 Suspension or damping
• CPC Class Codes: G06F 30/15 Vehicle, aircraft or watercraft design
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

Systems and methods are provided for controlling the simulation of a coupled hybrid dynamic system. A physical test rig configured to drive the physical structure component of the system and to generate a test rig response as a result of applying a test rig drive signal. A processor is configured with a virtual model of a complementary system to the physical structure component. The processor receives the test rig response and generates a response of the complementary system based on a received test rig response. The system can be driven with a random input. The processor compares the test rig response with the response of the complementary system, the difference being used to form a system dynamic response model.

Claims

1. An arrangement for characterizing a coupled hybrid dynamic system, comprising:

a physical test rig configured to drive a physical structural component of the system and to generate a test rig response comprising a first component and a second component as a result of applying a drive signal input to the test rig;

a storage device; and

a processor operable with the storage device to store a virtual model of a complementary system to the physical structural component, the processor configured to drive the physical test rig and store in the storage device a first component of the test rig response and a second component of the test rig response, the processor further configured to apply the first component of the test rig response to the virtual model and store a response of the model to the first component of the test rig response and compare the response of the model to the first component of the test rig response to the second component of the test rig response so as to form a difference, the difference being used by the processor to form a system dynamic response model and store said system dynamic response model in the storage device, to generate a test drive signal using an inverse of the system dynamic response model, and to output the test drive signal to control the physical test rig and test the physical structural component.

2. The arrangement of claim 1 wherein the virtual model comprises a plurality of disembodied assemblies or the virtual model is complementary to a plurality of disembodied physical assemblies.

3. The arrangement of claim 2, wherein the processor is further configured to:

generate the test rig drive signal, receive the test rig response, compare the second component of the test rig response with the model response to generate a simulation process error, and reduce the error using the inverse of the system dynamic response model, iteratively until a difference between the model response and the second component of the test rig response is below a defined threshold.

4. The arrangement of claim 3 wherein the virtual model and physical components together comprise a vehicle.

5. The arrangement of claim 3 wherein the virtual model comprises a plurality of disembodied wheel and tire assemblies or the physical disembodied assemblies each comprise a physical disembodied wheel and tire assembly.

6. The arrangement of claim 3 wherein the virtual model comprises a plurality of disembodied wheel and tire assemblies and the test rig drives spindles or other wheel and tire assembly supports of a vehicle.

7. The arrangement of claim 3 wherein the physical components comprise one disembodied wheel and tire assembly and the physical test rig is configured to drive said one disembodied wheel and tire assembly sequentially so as to obtain data corresponding to two of the physical disembodied physical assemblies.

8. The arrangement of claim 3 wherein the physical components comprise all the plurality of disembodied physical wheel and tire assemblies complementary to the virtual model and the test rig drives all the plurality of disembodied physical wheel and tire assemblies simultaneously.

9. The arrangement of claim 4 wherein the physical components comprise one disembodied physical assembly and the physical test rig is configured to drive said one disembodied physical assembly sequentially so as to obtain data corresponding to two of the physical disembodied physical assemblies.

10. A method of controlling a coupled hybrid dynamic system comprising modeled components in a virtual model and physical components, the method comprising:

controlling a physical test rig to drive the physical structural components and generate a test rig response comprising a first component and a second component as a result of applying a drive signal input to the test rig,

using a processor for generating a model response of the system based on using the first component as an input to the virtual model, for comparing the second component with the model response corresponding to form a difference, and for using the difference to form a system dynamic response model and store system dynamic response model in a storage device;

generating a test drive signal to test the physical structural components using an inverse of the system dynamic response model; and

controlling the physical test rig with the test drive signal to test the physical structural component.

11. The method of claim 10 and wherein the virtual model is a plurality of disembodied assemblies, or the virtual model being complementary to a plurality of disembodied physical assemblies.

12. The method of claim 11, further comprising:

applying a virtual drive, generating the test rig drive signal, receiving the test rig response, generating a model response, comparing the test rig response with the model response to generate a simulation process error, and reducing the error using the inverse of the system dynamic response model, iteratively until a difference between the model response and the test rig response is below a defined threshold.

13. The method of claim 11 wherein the virtual model and physical components together comprise a vehicle.

14. The method of claim 11 wherein the virtual model comprises a plurality of disembodied wheel and tire assemblies or the physical disembodied assemblies each comprise a physical disembodied wheel and tire assembly.

15. The method of claim 11 wherein the virtual model comprises a plurality of disembodied wheel and tire assemblies and controlling the test rig comprises driving spindles or other wheel and tire assembly supports of a vehicle.

16. The method of claim 11 wherein the physical components comprise one disembodied wheel and tire assembly and wherein controlling the physical test rig comprises driving said one disembodied wheel and tire assembly sequentially so as to obtain data corresponding to two of the physical disembodied physical assemblies.

17. The method of claim 11 wherein the physical components comprise all the plurality of disembodied physical wheel and tire assemblies complementary to the virtual model and wherein controlling the physical test rig comprises driving all the plurality of disembodied physical wheel and tire assemblies simultaneously.

18. The method of claim 11 wherein the physical components comprise one disembodied physical assembly and wherein controlling the physical test rig comprises driving said one disembodied physical assembly sequentially so as to obtain data corresponding to two of the physical disembodied physical assemblies.

19. The method of claim 11 wherein the physical components comprise all the plurality of disembodied physical assemblies complementary to the virtual model and wherein controlling the physical test rig comprises driving all the plurality of disembodied physical simultaneously.