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Keywords = work environment (WEN)

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19 pages, 5515 KB  
Article
Design, Simulation and High Precision Tracking Control of a Piezoelectric Optical Stabilization Platform
by Yonggang Yan, Can Cui, Jianjun Cui, Fuming Zhang, Kai Chen, Junjie Huang, Hang Xie and Dengpan Zhang
Micromachines 2026, 17(1), 87; https://doi.org/10.3390/mi17010087 - 8 Jan 2026
Viewed by 592
Abstract
Optical image stabilization (OIS) is crucial for improving airborne opto-electronic imaging performance under dynamic conditions. This study presents a two-dimensional piezoelectric-driven OIS platform capable of compensating linear image shift errors. A motion platform integrating a bridge amplification mechanism and right-angle guiding beams was [...] Read more.
Optical image stabilization (OIS) is crucial for improving airborne opto-electronic imaging performance under dynamic conditions. This study presents a two-dimensional piezoelectric-driven OIS platform capable of compensating linear image shift errors. A motion platform integrating a bridge amplification mechanism and right-angle guiding beams was developed, and its theoretical model was validated through finite element analysis (FEA). To enhance the platform’s repeatability, the hysteresis of the piezoelectric actuator was described using the Bouc-Wen model, and was optimized using a Hybrid Genetic Algorithm and Particle Swarm Optimization (HGAPSO). Experimental results demonstrated that the platform achieves a workspace of 53.92 μm × 53.76 μm, a motion resolution of 30 nm, a maximum coupling error of 2.28%, and a first-order resonant frequency of 356.69 Hz. A composite controller incorporating HGAPSO attained submicron tracking accuracy, with errors of 0.43 μm and 0.47 μm along the X and Y axes, respectively. Strong agreement among theoretical analysis, FEA, and experimental results confirms the platform’s precision and effectiveness meeting the requirements of the OIS. This work provides valuable guidance for the development of high-frequency OIS systems in highly dynamic operational environments. Full article
(This article belongs to the Section A1: Optical MEMS and Photonic Microsystems)
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18 pages, 1346 KB  
Article
Factors Impacting Occupational Safety among Women Engineers
by Nadia Abdelhamid Abdelmegeed Abdelwahed and Bahadur Ali Soomro
Safety 2023, 9(2), 38; https://doi.org/10.3390/safety9020038 - 1 Jun 2023
Cited by 4 | Viewed by 4597
Abstract
On the one hand, in the present era, construction companies are one of Egypt’s fastest-growing industries and provide significant economic returns. On the other hand, construction industries significantly put individuals in danger of accidental death. In this study, the researchers examined the factors [...] Read more.
On the one hand, in the present era, construction companies are one of Egypt’s fastest-growing industries and provide significant economic returns. On the other hand, construction industries significantly put individuals in danger of accidental death. In this study, the researchers examined the factors that affect Occupational Safety (OCS) measures among women engineers working in Egypt’s construction industries. This is a quantitative study that used cross-sectional data, and the researchers used 376 usable samples. By applying Structural Equation Modeling (SEM), this study’s findings demonstrate that the Work Environment (WEN), Personal Protection (PP), Training and Education of Safety Skills (TESS), Familiarity with Safety Regulations (FSR) and Safety Commitment (SCT) influence OCS. This study’s findings will help policymakers and planners design effective safety policies on construction sites. This study’s findings about adopting precautionary and safety measures will help reduce the death rates on Egypt’s construction sites. Finally, particularly in developing countries, this study’s findings will contribute to the health and safety and environment and health literature. Full article
(This article belongs to the Special Issue Women’s Issues in Safety)
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