Session 6.2: Test Points

Session 6.2 Outline

• 6.2.1: Test Points
• 6.2.2: Accessing a Test Point
• 6.2.3: Test Point Editor
• 6.2.4: Assigning Test Point Sensors
• 6.2.5: Allocate a Sensor Using the SSO
• 6.2.6: Test Point Report

Discussion 6.2.1: Test Points

• Shows Flow Property & Symptoms of an item
• Test Points are only applicable for subsystems & components
• Allows the user to assign Test Point sensors considered in Legacy & Analysis Sensor Sets

Exercise 6.2.2: Accessing a Test Point

1. Open the System Model of the Diesel Engine
2. Right-click on the Injector Pump component
3. Select Test Point from the menu
4. Alternatively, right-click on the Injector Pump in the Project Explorer and select Test Point from the menu

Discussion 6.2.3: Test Point Editor

The editor consists of 5 sections:

1. Details — show the name and description of the test point, total sensors, weight and sensitivity
2. Sensor Details — show the name, probability of detection (POD) and specificity of a selected sensor
3. Sensor Allocation — the main area displaying flow properties and assigned sensors
4. Sensor Library — shows available libraries and sensors
5. Recently Used Sensors — shows a list of the latest sensors allocated from all component test points

Exercise 6.2.4: Assigning Test Point Sensors

1. In the Injector Pump Test Point editor, select the Enable Test Point check box under the Details section
2. Locate Pressure Sensor in New User Library
3. Select and drag the Pressure Sensor and assign it to the Liquid Dynamic Pressure output
4. Right-click the sensor and select Method of Sensing > On-line

Exercise 6.2.5: Allocate a Sensor Using the SSO

Use the previously created Sensor Selection Optimizer (SSO) to automatically allocate the best sensor from the library to the required sensor location:

1. Open the Driveline system model
2. Right-click on the Differential component and select Test Point from the context menu
3. Within the Test Point editor select the Enable Test Point checkbox and then right-click on the Angular Velocity allocation area
4. Select Training SSO from the dialog
5. In the newly opened SSO editor, select the Sensor Pool tab
6. Select the checkboxes for the 3 Angular Velocity Sensors in the Included Sensors Summary section
7. Select the Alternatives Ranking tab and click Calculate
8. Go to the Analysis Results tab — displays a table showing the most to least optimal sensors for the proposed application
9. Select the highest performing sensor (Angular Velocity Sensor 2) and select Apply/Allocate

Discussion 6.2.6: Test Point Report

The Test Point report consists of several sections:

• Overview table — lists components with Test Point sensors assigned
• Sensor Summary table — shows flow properties/symptoms, their assigned sensors, methods of sensing and Probability of Detection
• Symptom Sensor Coverage Details table — lists fault coverage based on assigned symptom sensors
• Sensor Details table — lists vendor and reliability data, dimensions and costs for each sensor
• Sensor Parameters table — lists percentage and numerical parameters for each sensor

Exercise 6.2.6: Test Point Report

1. Select Reports > Report Wizard from the main menu
2. Select Component Test Point Report then Next
3. Select the Injector Pump component from the list
4. Select Next to go through report formatting options
5. Select Generate to generate the report

Session 6.2 Summary

• 6.2.1: Test Points
• 6.2.2: Accessing a Test Point
• 6.2.3: Test Point Editor
• 6.2.4: Assigning Test Point Sensors
• 6.2.5: Allocate a Sensor Using the SSO
• 6.2.6: Test Point Report