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Diagnostic Solutions

Diagnostic Solutions DSI provides a start-to-finish process for diagnostic design, analysis and implementation. Our solutions provide a clear method of analyzing the impact of diagnostics before they are deployed. This allows for informed decision making in deciding where to best place addition effort into improving the diagnostics of a system.

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Influencing IVHM Design for Enhanced Sustainment Capabilities

The utility of the IVHM (Integrated Vehicle Health Management), ISHM (Integrated Systems Health Management), PHM (Prognostics Health Management) or of performing more traditional RCM (Reliability Centered Maintenance) design development processes can be greatly enriched by initially adopting a more inclusive and integrated design development tactic within the design development lifecycle. The use of using eXpress as a “diagnostic engineering” tactical method to design development process will unlock a robust “interdisciplinary diagnostic design data interchange segue” capable of creating and leveraging interdependent design data in a much grander scale.

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Incorporate Multiple Technologies into a Single System Assessment

Many of the ideas and concepts regarding the targeting of an “agile” maintenance strategy for System or the System of Systems (SoS) begin with the formalizing of a unified approach to collectively capture the functionality of the participating designs into a robust integrated systems’ design development and process. But this design development process must be able to fully assess not solely the top-down functional allocation Systems’ Design and Sustainment Requirements (Operational Availability, etc.) but also be fully positioned to assess and validate the functional and failure cause (root cause) propagation from the bottom-up.

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Diagnostic Preparedness for AIA/ASD- S5000F

Dismissing the Benefit of being Diagnostically Proactive?

In viewing various applicable portions of the detail of the proposed IEEE S500F as it currently exists in the public domain, it is still unclear if any data structure is planned to be significantly robust to support the diagnostic engineering activities involved during the collaborative design development lifecycle for large, multi-organizationally Integrated Systems. To dismiss this proactive approach to designing for sustainment in the design development lifecycle can be an unfortunate lost opportunity to establish a collaborative approach to establishing the diagnostic integrity baseline for any complex system or equipment.

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Data Interoperability

In the Design Development paradigm, eXpress has a robust and unique capability that permits it to exchange component attributes, functionality and testing data effectively through its robust and unmatched diagnostic design data capture, organizing and structuring capabilities.

Once captured in eXpress, many lower level designs can be fully brought right into the test environment from the design. Whether this is a capability that is suited for the lab environment to work with common Automatic Test Equipment or later in the field to maximize operational objectives, ISDD leverage data interoperability for test and far beyond!

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Facilitating All Levels of Design Architecture

The eXpress Diagnostics Model is effective for all levels of the design architecture and can be expanded or enriched to facilitate the Diagnostic Design or the Sustainment objectives at any time.
The approach for initiating towards the goal of achieving diagnostic effectiveness for any design begins with identifying where we are in the design development or design support lifecycles, while also considering the diagnostic or sustainment requirements or objectives. The eXpress model captures and extends diagnostic expertise regardless of where we are in the design or sustainment lifecycles and for any sustainment implementation.

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Evaluating PHM as an Integrated Systems Capability

In recent years, military and aerospace programs have dedicated significant resources toward research in prognostics—developing sensors and measurements that they hope will not only improve system readiness, but also reduce the costs of product sustainment. Designed to identify incipient failures at the lowest levels of the system architecture, prognostic sensors are typically the end result of extremely detailed, yet extremely localized, physics-of-failure analyses.

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Data Interoperability throughout Design Development and Sustainment Lifecycle(s)

DSI has focused on design data interoperability for more than thirty years. We realized that, should programs or organizations make an investment into the creation of any data artifacts during the design development or the design sustainment lifecycle(s) they’re covered in either or both lifecycle(s)!

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Predictive Maintenance – Assessment and Alternatives

Predictive Maintenance (PM or “PdM”), in referring to the optimizing of the sustainment approach for a fielded asset, is attempting to facilitate and provide the means to detect and rectify failures of an equipment or system in advance of the failure(s). As such, the approach may consider the development or reliance upon a variety of specialized sensors or maintenance method(s). But determining the diagnostic or prognostic effectiveness of the sensors (BIT location, coverage, diagnostic validation, etc.) is the first step in determining the effectiveness of the sustainment capability for the fielded asset….

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Designing for IVHM or any On-Board Health Management

The eXpress diagnostic modeling environment is essential for determining the diagnostic designs’ ability to “Uniquely Isolate” any failures (or loss of function). This capability, designated as “FUI” in eXpress, enables the assessment to determine if the design is able to isolate between the sensor and any of the functions contained on the object that is being sensed.

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BIT Optimization – Validation- Integration

Traditionally, BIT has been assigned to “test” the presence of the proper functioning at various “testing locations or points”. Such test points have often been selected by the designer or the manufacturer based upon their specific expertise or available resources. If a more careful effort was to be required, then the determining of the BIT would require additional tools, technologies, expertise and then additional resources – meaning more cost and time.

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Impact of BIT on HM – ISHM, IVHM and PHM

The eXpress diagnostic modeling environment is essential for determining the diagnostic designs’ ability to “Uniquely Isolate” any failures (or loss of function). This capability, designated as “FUI” in eXpress, enables the assessment to determine if the design is able to isolate between the sensor and any of the functions contained on the object that is being sensed.

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Synchronizing Reliability and Diagnostic Engineering for IVHM

When designing for any diagnostic paradigm or any combinations of diagnostic paradigms, or most specifically when coordinating on-board operational run-time diagnostics (typically performed by Health Monitoring Systems and Health Management Systems by using on-board BIT sensing technologies) with off-board maintenance activities, the eXpress approach will facilitate the coordination, integration and cross-validation of the design assessment products from each design discipline.

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Diagnostic Impact on False Alarms and System Aborts

What is a “False Alarm”?

The definition of a False Alarm, unfortunately is dependent upon your specific perspective. In a very general sense, it is the improper reporting of a failure to the operator of the equipment or system. In addressing the universe of possibilities that could compromise the proper reporting of a failure, DSI has conquered one specific cause and the primary contributor to the experience of False Alarms, which is the “Diagnostic-Induced” False Alarms, or more simply “Diagnostic False Alarms”.

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Impact of BIT on HM- ISHM, IVHM and PHM

System or Vehicle “Health Status” is Reported by BIT

When the Start Up Built-In-Test (SBIT)reports back to the operator, or at the system or fielded product level, it is conveying the operational status, or health status of those specific subsystems that are involved in the proper functioning of the preliminary checkout of that equipment using the SBIT. Ultimately, we’ll need to examine precisely which functions are being examined by the SBIT or any other BIT, while the system or vehicle is operating in that particular state of operation, and as constrained by the functional test coverage by the specific SBIT.

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BIT Optimization- Validation – Integration

BIT Optimization, Validation and Integration

Traditionally, Built-in-Test (BIT) has been assigned to “test” the presence of the proper functioning at various “testing locations or points”. Such test points have often been selected by the designer or the manufacturer based upon their specific expertise or available resources. If a more careful effort was to be required, then the determining of the BIT would require additional tools, technologies, expertise and then additional resources – meaning more cost and time.

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Fault Code Assignment and Management

Within the eXpress and ISDD environment, the assigning and managing of the Fault Codes for the BIT throughout the design development of the IVHM is a rather simple and error-free integrated process. To perform this seamless capability for any IVHM or ISHM implementation, the ancillary eXpress Maintenance Module is required. The approach described below highlights some of the procedural steps to prepare the eXpress model for this additional purpose and benefit.

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Bit Optimization- Validation – Integration

Traditionally, Built-in-Test (BIT) has been assigned to “test” the presence of the proper functioning at various “testing locations or points”. Such test points have often been selected by the designer or the manufacturer based upon their specific expertise or available resources. If a more careful effort was to be required, then the determining of the BIT would require additional tools, technologies, expertise and then additional resources – meaning more cost and time.

Read More

Designing for IVHM or any on-board Health Management

The eXpress diagnostic modeling environment is essential for determining the diagnostic designs’ ability to “Uniquely Isolate” any failures (or loss of function). This capability, designated as “FUI” in eXpress, enables the assessment to determine if the design is able to isolate between the sensor and any of the functions contained on the object that is being sensed.

Read More

Synchronizing Reliability and Diagnostic Engineering

When designing for any diagnostic paradigm or any combinations of diagnostic paradigms, or most specifically when coordinating on-board operational run-time diagnostics (typically performed by Health Monitoring Systems and Health Management Systems by using on-board BIT sensing technologies) with off-board maintenance activities, the eXpress approach will facilitate the coordination, integration and cross-validation of the design assessment products from each design discipline.

Read More

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