研究目的
Investigating the preheating temperature control problem in 3D printers based on the selective laser sintering (SLS) technology to ensure the exponential stability of the temperature profile to a desired setpoint.
研究成果
The backstepping-based controller effectively tracks the desired temperature setpoint in 3D printers using SLS technology, showing promise for industrial implementation. Future directions include avoiding overshooting and enhancing robustness with integral action.
研究不足
The model does not account for the unmodeled dynamics of the embedded power electronics in the preheating laser, leading to discrepancies in the transitory response. Future work includes developing sufficient conditions to avoid overshooting and incorporating an integral action for improved robustness.
1：Experimental Design and Method Selection:
The study uses a temporal sequence of one-dimensional partial differential equations (PDEs) to describe the heat transfer during the preheating process. The backstepping method is employed for control design.
2：Sample Selection and Data Sources:
The physical properties of polyamide 12 are used, with simulations and experimental data from a prototype.
3：List of Experimental Equipment and Materials:
A CO2 laser tube, water chiller, polyamide 12 powder, and an infrared sensor thermoMETER CS, Micro-Epsilon for temperature measurement.
4：Experimental Procedures and Operational Workflow:
The control system is implemented on a computer with LabVIEW-based software executing the backstepping control system.
5：Data Analysis Methods:
The exponential stability of the estimation error in the L2 norm is analyzed through numerical simulations and experimental results.
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