Method of off-line hybrid system assessment for test monitoring and modification
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Publication Number
US-10061278-B2
Publication Date
2018-08-28
Expiration Date
Abstract
A method and an arrangement of controlling simulation of a coupled hybrid dynamic system comprising a component under test and a virtual model includes driving the physical component under test of the system on a test rig over a period of time to conduct a test by applying an initial test drive signal input to the test rig to generate a test rig response. At least a portion of the test rig response is inputted into the virtual model of the system to obtain a model response of the system. A condition of the physical component under test is assessed during at least a portion of the period of time to conduct the test based on comparing another portion of the test rig response with the model response where an output relating to the assessment is recorded or rendered.
Core Innovation
The invention relates to an off-line/monitoring framework for a coupled hybrid dynamic system test simulation that includes a physical test rig driving a physical component under test and a virtual model of the system less the physical component under test. An interface is defined where the physical component interfaces with the virtual model to form a complete system.
Prior to conducting a test, the framework drives the physical test rig and stores a first portion and a second portion of a test rig response. A first portion of the test rig response is applied to the virtual model, and a response of the virtual model is stored and compared with the first portion of the test rig response, forming a difference used to form a system dynamic response model stored in the storage device.
An initial test drive signal is generated using an inverse of the system dynamic response model. During the test, at least a portion of the test rig response is received into the virtual model and a first model response at the interface is obtained.
The framework assesses a changing condition of the physical component under test during at least a portion of the first period of time by comparing another portion of the first test rig response at the interface with the first model response due to continued application of the test drive signal input. An output corresponding to the changed condition is recorded or rendered, and a new test drive signal is generated from data corresponding to the assessed changes and the first test drive signal for a second period of time subsequent to the first period of time.
Claims Coverage
The partial set includes two independent claims, a system claim and a method claim, defining a coupled hybrid dynamic system simulation/control approach with six inventive features.
Virtual model excluding the physical component with interface defined
Storing a virtual model of the system less the physical component under test and defining an interface where the physical component interfaces with the virtual model to form a complete system.
System dynamic response model from partitioned rig response and response difference
Driving the physical test rig prior to conducting a test to store a first portion and a second portion of a test rig response, applying the first portion to the virtual model, and comparing the virtual model response to the first portion so as to form a difference used to form a system dynamic response model stored in the storage device.
Inverse-based initial test drive signal generation from the system dynamic response model
Generating a first test drive signal using an inverse of the system dynamic response model.
Interface comparison for assessing changing condition and recording/rendering
During the test, comparing another portion of the first test rig response at the interface with the first model response to assess a changing condition of the physical component under test, and recording or rendering an output corresponding to the changed condition.
New test drive signal generation for subsequent test period based on assessed changes
Generating a new test drive signal from data corresponding to the assessed changes in the physical component under test and the first test drive signal for a second period of time subsequent to the first period of time.
Selective new drive signal based on comparing response portions corresponding to changes
Inputting at least a portion of the first test rig response into the virtual model and obtaining a first model response, and generating a new test rig drive signal based selectively on the initial test drive signal and an output of comparing another portion of the first test rig response with the first model response.
Across the independent claims, the core inventive pattern is maintaining a virtual model of the system less the physical component, using partitioned test rig response portions to form a system dynamic response model and difference, generating drive signals using an inverse of that model, and assessing a changing condition via interface response comparison to generate a new test rig drive signal for a subsequent period.
Stated Advantages
Documented Applications
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