Test Point

The PHM module allows the user to capture pre-existing (built-in or legacy) sensors

integrated with the system in the form of component and subsystem test points. Test

point sensors are used to detect a symptom or mitigate a failure mode, and should be

captured in the system model to understand the inherent diagnostic capabilities in the

design. By adding a test point sensor, flow properties & symptoms are monitored and

will Not require additional coverage in automated diagnostic analyses.

Allocating Test Point Editor

1. Select (Right-click) a component or subsystem.
2. Select Test Point from the menu.

[Image: ComponentTestPoint.gif]

Details Section

The Details section of the Test Point editor allows the user to view the test point

name, total number of sensors, total sensor weight, and estimated sensor POD

(sensitivity). The user can add a description and enable the component/subsystem test

point to include its response in a sensor coverage analysis. Assigning a sensor to a

test point will prompt the user to select the checkbox to enable the component test

point for its coverage to be included for further sensor analyses. The test point can

also be enabled or disabled manually by selecting (Left-click) the check-box beside

"Enable Component Test".

[Image: CTPDetails.png]

To fill in the Details section of a Test Point:

1. Select the Enable Test Point check-box to include the test point in sensor analyses.
2. Select (Left-click) the Name and Description to fill in these details.
3. Review the Total Sensors/Weight & Component POD fields when sensors are allocated.

Sensor Allocation Section

The Sensor Allocation Section displays sensors assigned to a flow property or

symptom of a component/subsystem. This section is completed by identifying and

assigning the appropriate sensors from the Sensor Library. Sensors assigned to symptoms

impact the coverage of associated functional flows depending on the connections and

failure mode ratios.

[Image: SensorAllocation.png]

To allocate test point sensors:

1. Search the Sensor Library for the appropriate flow/symptom sensor required.
2. Drag the sensor to the nominated flow property/symptom .

Component/Subsystem with test point sensors are indicated on the system model using

the icon:

[Image: CTPIcon.png]

[Image: CTPSystemModel.png]