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

Inventors

Fricke, David M.

Assignees

MTS Systems Corp

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.

Core Innovation

The problem is to characterize a coupled hybrid dynamic system without relying on acquiring prior vehicle data or needing real-time component modeling, while still enabling physical testing of a physical structural component. A coupled hybrid dynamic system includes a physical test rig driving a physical structural component to generate a test rig response having a first component and a second component. A processor uses this two-part response in combination with a stored complementary virtual model to determine how the system behaves dynamically.

The processor stores a virtual model of a complementary system to the physical structural component, applies the first component of the test rig response to the virtual model, and stores a response of the model to the first component of the test rig response. The processor compares the model response to the first component of the test rig response to the second component of the test rig response to form a difference, and uses the difference to form a system dynamic response model.

The processor stores the system dynamic response model and generates a test drive signal using an inverse of the system dynamic response model. The processor outputs the test drive signal to control the physical test rig, and the physical test rig then tests the physical structural component. In embodiments, the virtual model and the physical structural components are described using vehicle modeling with wheel and tire assemblies and multiple disembodied assemblies, where the test rig can drive complementary components sequentially or simultaneously.

Claims Coverage

The document includes two independent claims that cover a coupled hybrid dynamic system using a complementary virtual model, response-component comparison, a system dynamic response model formed from a difference, and an inverse-based test drive signal. The inventive features focus on the split test rig response into first and second components, mapping the first component through the virtual model, comparing to form a difference, forming the system dynamic response model, and using an inverse of that model to generate the test drive signal.

Across both independent claims, characterization/control is achieved by driving a physical structural component to generate a test rig response with first and second response components, applying the first component to a complementary virtual model to generate a model response, comparing model response and second-component response to form a difference used to form and store a system dynamic response model, and generating an inverse-based test drive signal to control the physical test rig for further testing.

Stated Advantages

Documented Applications