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Jonas Talley Thesis 5_6_2026
Embargoed Access, Embargo ends: 07/16/2028
Thesis
Real-Time Control of Micro-Scale Direct Ink Writing (DIW) Using Model-Based Flow Rate Estimation Feedback
Master of Science (MS), Washington State University
2026
Abstract
The ability to precisely control the flow rate of a material extrusion additive manufactur-ing process is critical to prevent defects. Issues such as excess material, bulging, and low final
porosity occur when the flow rate is poorly controlled. As the size of the nozzle decreases,
additional transient effects are experienced due to viscous and compressibility forces, which
leads to less control. This work presents a method for in-situ parameter identification and
flow rate control. A custom 3D Printer with Direct Ink Writing (DIW) capabilities with an
integrated pressure sensor is used to first compress the unknown material, then fit generalized
material models to learn a local solution to compressibility. These parameters are then used
to provide real-time flow rate estimation feedback for control, minimizing the transience of
flow rate changes.
The presented approach opens possibilities to a broader range of materials without need-
ing extensive material characterization before use.
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Details
- Title
- Real-Time Control of Micro-Scale Direct Ink Writing (DIW) Using Model-Based Flow Rate Estimation Feedback
- Creators
- Jonas Talley
- Contributors
- B. Arda Gozen (Advisor)Narasimha Boddeti (Committee Member)Scott Beckman (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Mechanical and Materials Engineering
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Number of pages
- 98
- Identifiers
- 99901393505001842
- Language
- English
- Resource Type
- Thesis