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Keywords: modeling
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Accepted Manuscript
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control.
Paper No: ALDSC-24-1002
Published Online: June 24, 2024
...@umich.edu Email: moeenrad@umich.edu Email: awtar@umich.edu Dynamics and control Flexible structures Linear systems mechatronics Modeling motion controls vibration control Vibrations ASME Letters in Dynamic Systems and Control. Received January 07, 2024; Accepted manuscript posted May...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2023, 3(4): 041007.
Paper No: ALDSC-23-1057
Published Online: January 2, 2024
...Aleksandr Shkoruta; Bumsoo Park; Sandipan Mishra Reliable process control for the laser powder bed fusion process, especially at the melt pool scale, remains an open challenge. One of the reasons for this is the lack of suitable control-oriented models and associated control design strategies...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2023, 3(4): 041006.
Paper No: ALDSC-23-1050
Published Online: December 8, 2023
... this issue, soft robots often have built-in stiffness tuning mechanisms that allow for controlled increases in stiffness. Additionally, redundant pneumatic manipulators can utilize antagonistic pressure to achieve identical positions under increased stiffness. In this paper, we develop a model to predict...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2023, 3(4): 041001.
Paper No: ALDSC-23-1023
Published Online: December 7, 2023
... loading on the structure. For short beams for which 3D effects become prominent, existing local theories based on two-dimensional (2D) fluid approximations are inadequate to predict the dynamic response. We discuss and compare model predictions in terms of frequency response functions, modal shapes...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2023, 3(4): 041003.
Paper No: ALDSC-23-1034
Published Online: December 7, 2023
... in the presence of disturbances in the model. Unlike gradient-based approaches, the Newton algorithm eliminates the need for the unknown Hessian matrix, allowing for user-assignable convergence rates. The Lyapunov-based switched approach also ensures asymptotic convergence to the optimal set point. Simulation...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. July 2023, 3(3): 031001.
Paper No: ALDSC-23-1038
Published Online: October 25, 2023
... the wafer and an electrostatic chuck (ESC) and an algorithm of the model predictive control (MPC) combined with an observer. The temperatures are measured only at the wafer edge zone and the ESC ceramic plate that are accessible during the process. The observer estimates wafer temperatures of center...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. April 2023, 3(2): 021005.
Paper No: ALDSC-23-1051
Published Online: October 13, 2023
... associated with computer modeling. 1 Paper presented at the 2023 Modeling, Estimation, and Control Conference (MECC 2023), Lake Tahoe, NV, Oct. 2–5. Paper No. MECC2023-124. This research was supported by the Jet Propulsion Laboratory, California Institute of Technology, under a contract...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. April 2023, 3(2): 021002.
Paper No: ALDSC-23-1018
Published Online: October 5, 2023
... both finite element modeling and control-oriented modeling to predict and improve the quality of printed parts. In this paper, we propose a novel control-oriented multi-track melt pool width model that utilizes the superposition principle to account for the complex thermal interactions that occur...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. January 2023, 3(1): 011007.
Paper No: ALDSC-22-1039
Published Online: June 13, 2023
... piezoelectric elastic compliance for PZT s 11 7.68 × 10 −12 m 2 /N Density of PZT ρ 7800 kg/m 3 Considering a Bernoulli beam, the linear and static model of the above piezoelectric bimorph cantilevered actuator can be derived from [ 17 ]: (1) y ( x ) = d u ( x ) ⋅ u...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. January 2023, 3(1): 011004.
Paper No: ALDSC-22-1036
Published Online: March 8, 2023
...Evan Kawamura; Dilmurat Azimov This study aims to analyze three unmanned aerial vehicles’ static and dynamic motor thrust models and to compare them with flight test telemetry motor angular velocity data as ground truth. This comparison determines which model is the most accurate based on the root...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2022, 2(4): 041003.
Paper No: ALDSC-22-1005
Published Online: November 2, 2022
...Manash Chakraborty; Ryan J. Caverly This letter presents a method to model the disturbance environment of a dual-stage hard disk drive (HDD), which is then used to predict the actuator stroke usage (i.e., the range of actuator displacement used) of a closed-loop track-following controller...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. October 2022, 2(4): 040902.
Paper No: ALDSC-22-1025
Published Online: October 19, 2022
... navigation and obstacle avoidance in dynamic environments. The literature on modeling and control of omni-wheel robots usually relies on the kinematic model or simplified kinematic model. Then developing control laws based on these reduced-effect models. In this article, we developed an efficient full...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. July 2022, 2(3): 031004.
Paper No: ALDSC-21-1047
Published Online: March 22, 2022
... conditions, and this may lead to the cavity collapse and degradation of drag reduction. In the present study, a lumped-element model is applied for the analysis of dynamics of the air cavity under a boat hull moving in the presence of sea waves. When the hull accelerates from a low initial speed to a high...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. April 2022, 2(2): 021001.
Paper No: ALDSC-20-1089
Published Online: July 19, 2021
.... Modeling of the melt pool image response to changes in the input laser power is presented. Based on this identified model, a real-time feedback controller is implemented experimentally on a single track and part scales. On a single-track scale, the controller successfully tracks a time-varying melt pool...
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. January 2022, 2(1): 011010.
Paper No: ALDSC-21-1015
Published Online: July 16, 2021
... and experimental results have been presented and compared to the numerical solution of the nonlinear equations of motion. The agreement between theory and experiment is good but points to the limitations of the dipole model for the magnets. A formulation that models the magnets as having physical extent...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. July 2021, 1(3): 031010.
Paper No: ALDSC-20-1061
Published Online: February 23, 2021
...Yumeng Wu; George Chiu This paper proposes an improved model of height profile for drop-on-demand printing of ultraviolet curable ink. Unlike previous model, the proposed model propagates volume and covered area based on height difference between adjacent drops. Height profile is then calculated...