Micro-Mechatronic Engineering

Topic Information

Dear Colleagues,

The 25th International Conference of Fluid Power and Mechatronic Control Engineering (ICFPMCE, https://2024.icfpmce.cn/) will be held on 17-20 July 2024, in China, and will provide a multidisciplinary forum in the fields of hydraulics, mechanics and electrical engineering, ranging from the latest fundamental research to industrial applications. This Topic is expected to include high-quality papers presented at ICFPMCE 2024 regarding micro-mechatronic engineering. Papers that have not been presented at ICFPMCE are also welcome. We invite you to share your novel ideas and achievements by contributing original research articles or comprehensive review papers to this Topic.

Dr. Teng Zhou
Dr. Antonio F. Miguel
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Applied Sciences applsci	2.7	4.5	2011	16.9 Days	CHF 2400	Submit
Electronics electronics	2.9	4.7	2012	15.6 Days	CHF 2400	Submit
Fluids fluids	1.9	2.8	2016	20.7 Days	CHF 1800	Submit
Micromachines micromachines	3.4	4.7	2010	16.1 Days	CHF 2600	Submit
Processes processes	3.5	4.7	2013	13.7 Days	CHF 2400	Submit
Inventions inventions	3.4	5.4	2016	17.4 Days	CHF 1800	Submit

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Published Papers (6 papers)

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All Applied Sciences Electronics Fluids Micromachines Processes Inventions

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16 pages, 6490 KiB  

Open AccessArticle

Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle

by Shurui Zhang, Yong Li, Xudong Wang, Songcai Lu, Yusong Yu and Jun Yang

Micromachines 2024, 15(1), 22; https://doi.org/10.3390/mi15010022 - 22 Dec 2023

Viewed by 740

Abstract

When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster. In this study, the effect of different wall [...] Read more.

When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster. In this study, the effect of different wall temperatures on the rarefied flow and heat transfer in the micro-nozzle is investigated based on the DSMC method. The micro-nozzle structure in this paper has a micro-channel with a large length-to-diameter ratio of 10 and a micro-scale needle valve displacement (maximum needle valve displacement up to 4 μm). This leads to more pronounced multiscale flow characteristics in the micro-nozzle, which is more influenced by the change in wall temperature. At wall temperatures ranging from 100 K to 1000 K, the spatial distribution of local Kn distribution, slip velocity distribution, temperature, and wall heat flux distribution in the micro-nozzle were calculated. The slip flow region is located in the flow channel and transforms into transition flow as the slip velocity reaches approximately 50 m/s. The spatial distribution of the flow pattern is dominated by the wall temperature at small needle valve opening ratios. The higher the wall temperature, the smaller the temperature drop ratio in the low-temperature region inside the micro-nozzle. The results of the study provide a reference for the design of temperature control of micro-nozzles in cold gas micro-thrusters. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)

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16 pages, 14896 KiB  

Open AccessArticle

An Inspection Technique Using Fit Clearance Based on Microscopic Vision in Precision Assembly

by Yawei Li, Yi Luo and Xiaodong Wang

Micromachines 2023, 14(10), 1852; https://doi.org/10.3390/mi14101852 - 27 Sep 2023

Viewed by 763

Abstract

Inspection is a crucial process to ensure product quality. In the precision assembly of an optic-mechanical device, a part with micro multi-section arcs needs to be inspected and assembled into another part. Actually, because of machining errors, including dimensional and geometric shapes, can [...] Read more.

Inspection is a crucial process to ensure product quality. In the precision assembly of an optic-mechanical device, a part with micro multi-section arcs needs to be inspected and assembled into another part. Actually, because of machining errors, including dimensional and geometric shapes, can lead to complex deformation modes for parts with micro multi-section arcs, posing challenges to their inspection. Furthermore, inconsistencies in feature images in microscopic vision may complicate the extraction of the Region of Interest (ROI). To address these issues, this paper proposes an ROI extraction method based on the CAD model for rough positioning of feature points and connected region detection for refinement. Subsequently, based on feature points, the CAD model is used again to obtain the ROI. For inspection purposes, this paper proposes a method suitable for micro multi-section arcs based on assembly fit requirements. Experimental testing was performed on parts with eight-section arcs and mirrors to verify the effectiveness of the proposed method. This method provides a suitable solution for the inspection of micro multi-section arcs in precision assembly with the potential to improve the accuracy of the inspection results. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)

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13 pages, 3419 KiB  

Open AccessArticle

Design and Processing of Gas Turbine Blades Based on Additive Manufacturing Technology

by Xuan Liu, Xingguo Han, Guofu Yin, Xiaohui Song and Lixiu Cui

Micromachines 2023, 14(9), 1675; https://doi.org/10.3390/mi14091675 - 27 Aug 2023

Viewed by 1816

Abstract

Aiming at the problems of the complex shape, difficult three-dimensional (3D) digital modeling and high manufacturing quality requirements of gas turbine blades (GTB), a method of fitting the blade profile line based on a cubic uniform B-spline interpolation function was proposed. Firstly, surface [...] Read more.

Aiming at the problems of the complex shape, difficult three-dimensional (3D) digital modeling and high manufacturing quality requirements of gas turbine blades (GTB), a method of fitting the blade profile line based on a cubic uniform B-spline interpolation function was proposed. Firstly, surface modeling technology was used to complete the fitting of the blade profile of the GTB, and the 3D model of the GTB was synthesized. Secondly, the processing parameters of the additive manufacturing were set, and the GTB model was printed by fused deposition technology. Then, the rapid investment casting was completed with the printed model as a wax model to obtain the GTB casting. Finally, the blade casting was post-processed and measured, and it was found to meet the requirements of machining accuracy and surface quality. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)

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17 pages, 5536 KiB  

Open AccessArticle

Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

by Mingchao Li, Pengbin Cao, Cong Zhang, Kuan Yan and Yuquan Zhang

Micromachines 2023, 14(8), 1618; https://doi.org/10.3390/mi14081618 - 17 Aug 2023

Viewed by 1068

Abstract

Laser soldering is a crucial soldering technique in the realm of electronic assembly. The temperature of the solder joint is intimately connected with the quality of the solder. This paper introduces an adjustable power upper limit variable-structure Proportional–Integral–Derivative (PID) intelligent control method for [...] Read more.

Laser soldering is a crucial soldering technique in the realm of electronic assembly. The temperature of the solder joint is intimately connected with the quality of the solder. This paper introduces an adjustable power upper limit variable-structure Proportional–Integral–Derivative (PID) intelligent control method for regulating the temperature of the solder joint during laser soldering. Distinct laser power limits are employed for workpieces with varying heat capacities. The solder joint temperature is monitored through an infrared thermometer, which enables closed-loop temperature control via a variable-structure PID algorithm. Residual neural network (ResNet) models are utilized to predict key soldering process parameters. This method has been executed and validated on a practical testing platform. Compared to other laser soldering control techniques, the proposed method demonstrates a low overshoot, rapid dynamic response, and swift adjustment capabilities, effectively enhancing the soldering quality and production efficiency. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)

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16 pages, 1679 KiB  

Open AccessReview

Review of the Flight Control Method of a Bird-like Flapping-Wing Air Vehicle

by Xiaoqing Fang, Yian Wen, Zhida Gao, Kai Gao, Qi Luo, Hui Peng and Ronghua Du

Micromachines 2023, 14(8), 1547; https://doi.org/10.3390/mi14081547 - 31 Jul 2023

Cited by 2 | Viewed by 1810

Abstract

The Bird-like Flapping-wing Air Vehicle (BFAV) is a robotic innovation that emulates the flight patterns of birds. In comparison to fixed-wing and rotary-wing air vehicles, the BFAV offers superior attributes such as stealth, enhanced maneuverability, strong adaptability, and low noise, which render the [...] Read more.

The Bird-like Flapping-wing Air Vehicle (BFAV) is a robotic innovation that emulates the flight patterns of birds. In comparison to fixed-wing and rotary-wing air vehicles, the BFAV offers superior attributes such as stealth, enhanced maneuverability, strong adaptability, and low noise, which render the BFAV a promising prospect for numerous applications. Consequently, it represents a crucial direction of research in the field of air vehicles for the foreseeable future. However, the flapping-wing vehicle is a nonlinear and unsteady system, posing significant challenges for BFAV to achieve autonomous flying since it is difficult to analyze and characterize using traditional methods and aerodynamics. Hence, flight control as a major key for flapping-wing air vehicles to achieve autonomous flight garners considerable attention from scholars. This paper presents an exposition of the flight principles of BFAV, followed by a comprehensive analysis of various significant factors that impact bird flight. Subsequently, a review of the existing literature on flight control in BFAV is conducted, and the flight control of BFAV is categorized into three distinct components: position control, trajectory tracking control, and formation control. Additionally, the latest advancements in control algorithms for each component are deliberated and analyzed. Ultimately, a projection on forthcoming directions of research is presented. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)

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14 pages, 6065 KiB  

Open AccessArticle

Rapid Calibration of Nanoliter per Second Flow Rate by Image Processing Technology

by Jiawei Luo, Cheng Yang and Yan Shen

Micromachines 2023, 14(6), 1189; https://doi.org/10.3390/mi14061189 - 02 Jun 2023

Viewed by 995

Abstract

The need for high-precision microflow control is increasingly evident across various fields. For instance, microsatellites employed in gravitational wave detection require flow supply systems with a high accuracy of up to 0.1 nL/s to achieve on-orbit attitude control and orbit control. However, conventional [...] Read more.

The need for high-precision microflow control is increasingly evident across various fields. For instance, microsatellites employed in gravitational wave detection require flow supply systems with a high accuracy of up to 0.1 nL/s to achieve on-orbit attitude control and orbit control. However, conventional flow sensors are unable to provide the necessary precision in the nanoliter per second range, and thus, alternative methods are required. In this study, we propose the use of image processing technology for rapid microflow calibration. Our method involves capturing images of the droplets at the outlet of the flow supply system to rapidly obtain the flow rate, and we used the gravimetric method to verify the accuracy of our approach. We conducted several microflow calibration experiments within the 1.5 nL/s range and demonstrated that image processing technology can achieve the desired accuracy of 0.1 nL/s while saving more than two-thirds of the time required to obtain the flow rate within an acceptable margin of error compared to the gravimetric method. Our study presents an efficient and innovative approach to addressing the challenges of measuring microflows with high precision, particularly in the nanoliter per second range, and has the potential for widespread applications in various fields. Full article

(This article belongs to the Topic Micro-Mechatronic Engineering)
(This article belongs to the Section E：Engineering and Technology)

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