Methods and systems for testing coupled hybrid dynamic systems

• US 10,371,601 B2
• Filed: 09/09/2014
• Issued: 08/06/2019
• Est. Priority Date: 09/09/2013
• 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): Kundu, Sujoy K
• Assistant Examiner(s): Dinh, Lynda
• Application Number:
  US14/481,680
• Publication Number:
  US 20150134291A1
• Time in Patent Office: 1,792 Days
• Field of Search: 702113
• CPC Class Codes: G01M 17/00 Testing of vehicles testing fluid tightness G01M3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, G01M5/00; testing alignment of vehicle headlight devices G01M11/06; testing of engines G01M15/00
• 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

Abstract

A test system and method for testing a coupled hybrid dynamic system in simulated motion along a path (242) includes a physical test rig (206) configured to test a physical component (208). A processor (30) is configured with modeled test data (218), a first virtual model portion and a second virtual model portion of the coupled hybrid dynamic system, the first virtual model portion (204), the second virtual model (202) portion and the physical component (80) comprising the coupled hybrid dynamic system. The processor (30) is configured to control the test rig (206) such that the component under test (208) responds to the second virtual model portion (202), that in turn receives a first input (272) comprising the modeled test data (218), a second input (216) being motion of the first virtual model portion (204) of the coupled hybrid dynamic system, a third input (214) being a control mode response from the test rig having (206) the physical component (208) under test and a fourth input (272) comprising guidance controls for the coupled hybrid dynamic system.

Claims

1. A test system for testing a coupled hybrid dynamic system corresponding to a vehicle in simulated motion along a virtual path, the test system comprising:

a physical test rig with at least one actuator configured to test a physical structural component of the vehicle using the at least one actuator;

memory storing;

a first virtual model portion of the coupled hybrid dynamic system;

a second virtual model portion of the coupled hybrid dynamic system,

the first virtual model portion, the second virtual model portion and the physical structural component comprising the coupled hybrid dynamic system, and

wherein the first virtual model portion includes a decoupled vehicle part with constraints acting on the decoupled vehicle part;

data corresponding to a plurality of attachment points defining connections in the coupled hybrid dynamic system; and

a processor coupled to the memory and the physical test rig and configured to derive a drive that when executed by the processor operates the at least one actuator of the physical test rig,

the derived drive corresponding to the first virtual model portion, the second virtual model portion and the physical structural component virtually moving together along the path,

the second virtual model portion receiving

a first input comprising modeled test data,

a second input being motion of the first virtual model portion of the coupled hybrid dynamic system, and

a third input being a response from the physical test rig having the physical structural component under test and

the first virtual model portion receiving

a fourth input comprising guidance controls from a virtual guidance control, and

a fifth input being a response from the physical structural component under test, wherein the derived drive obtained by iteratively applying test drives of the physical test rig until the virtual guidance control for the first virtual model portion is at least negligible when inputs into the first virtual model portion corresponding to the attachment points from a response of the physical test rig to the derived drive properly positions the first virtual model portion to move with the second virtual model portion along the path.

2. The test system of claim 1 wherein the processor is further configured to have guidance control inputs for the second virtual model portion corresponding to a driver of the vehicle.

3. The test system of claim 1 wherein the modeled test data comprises a road upon which the vehicle travels.

4. The test system of claim 1 wherein the guidance inputs for the second virtual model portion are iteratively corrected.

5. The test system of claim 1 wherein the inputs into the first virtual model portion corresponding to the attachment points comprise forces.

6. The test system of claim 1 the first virtual model portion comprises a body of the vehicle and the second virtual model portion comprises a plurality of tire and wheel assemblies.