The document summarizes Yanhao Zhu's end of internship presentation at Altair Engineering. It describes the five projects Zhu completed during the internship, including improving MotionSolve documentation and help systems, developing validation methods for graphics classes, testing Nuqa models, improving composite classes, and creating a regular expression converter. It also outlines the skills Zhu acquired in model-based design, CAE software composition, and Python development. Zhu suggests assigning interns a contact for each team and extending internships to allow working on more complex projects involving multiple solvers and optimization techniques.

1. Innovation Intelligence®
End of Internship Presentation
Yanhao Zhu
Software Development Intern
Aug 2, 2016

2. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Overview
• Projects done
• Skills acquired
• Suggestions

3. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Projects Done
1. MotionSolve help system
2. Validation method for graphic classes
3. Nuqa test
4. Composite Class
5. Regular expression convertor

4. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
MotionSolve help system
• Documentation proofread
 Replace deprecated code
 Add missing properties
 Reference manual for Dv,Rv

5. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
MotionSolve help system
• Python inline help system
Class Demo(SolverObject):
a = Double()
b = Bool ()
……
a.addDocString(tr(‘Property a of Demo’))
b.addDocString(tr(‘Property b of Demo’))

6. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
MotionSolve help system
• Tutorial Examples
 Single pendulum
 Bouncing ball
 LuGre composite
 Slotted link

7. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Validation method for graphic classes
• Criterion:
 Pass the validation if the graphic is physically correct and each dimension is
positive
 Send a warning if the graphic is physically correct but at least one dimension
is zero
 Send an error if the the graphic is not physically correct

8. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Validation method for graphic classes
• Test script with pytest
 Issue: cannot distinguish the case where warning is sent
 Solution: Overwrite the Validator class

9. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Nuqa test
• Task: figure out the regression
 Remove the model for which lexicon api doesn’t run
 Generate api_sendoff function calls for comparison
 Issue: minor numerical difference in marker position and orientation

10. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Composite class
• Improve the way that property values are updated
 Replace setChildDataValue with updateChildren
 Retain setChildDataValue for complex model

11. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Composite class
• Convert machinery scripts from mslexicon to msolve
 Run the model with same parameters as in mslexicon for verification
 Demonstrate the ability to change the property value during simulation
Property
value
changed

12. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Regular expression convertor
• Msolve mslexicon class/function comparison
 extract_mslexicon and extract_modelpy to extract information
 compare to generate three list: ‘lexicon_only’, ‘modelpy_only’ and
‘common_different’
 output_file

13. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Regular expression convertor
• Output file:
Section one
Section two
Section three

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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Skills acquired
• MBD projects
• Composition of CAE software
• Hands on python experience as a developer

15. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Suggestions
• Be assigned someone to contact for each team
 Incorrect mesh for complex geometry
• Longer internship
 Interface that calls multiple solvers
 Parallelize the finite difference method in optimization and do some
application

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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Thank you!