Disposable diapers are widely used by individuals with urinary incontinence. Diapers should be checked frequently for elderly, disabled, and hospital patients. Wet diapers that are not changed properly can cause health problems. The importance of electronic devices that provide warning in case of wetness is increasing in health monitoring. A disposable and wearable printed humidity sensor was designed and fabricated to detect wetness. The sensor was printed on polyamide-based taffeta label fabric by the inkjet printing method using specifically formulated PEDOT:PSS-based conductive polymer ink. The sensor sensitivity was tested under different relative humidity levels inside a controlled chamber. The resistance of the sensor decreased from 17.05 ± 0.05 MΩ to 2.09 ± 0.06 MΩ as the relative humidity increased from 35 to 100%, while the moisture value of the fabric increased from 4.8 to 23%. The response and recovery times were 42 s and 82 s. This sensor was integrated into the adult diaper to evaluate wetness. The sensor resistance change comparing to the dry state resistance (15.52 MΩ) was determined as 3.81 MΩ to 13.62 MΩ by dripping 0.1 mL to 100 mL salty water on the diaper. Due to its flexible structure and low-cost printability onto fabric, the wearable printed humidity sensor has the potential to be used as a disposable sensor for healthcare applications, particularly for urinary incontinence and capturing wetness in diapers.

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The vibration parameters of a bi-copter-type unmanned aerial vehicle is optimized by considering operational vibration with payloads. The double electric ducted fan loads, which transmit excitations to the fuselage, are predicted and compared using optimization methods. While the minimum vibration amplitude for stress will be achieved at 7.69 Hz, it will be 9.80 Hz. for minimum deformation without sacrificing safety factor requirement. It ensures sensitive vertical acceleration. It is not seen significant differences on results from screening and genetic algorithm methods. Correlations between frequencies and structural responses are determined. It is observed that the stress and deformation amplitudes of the structure decreases at increasing frequencies up to the next natural frequency. While the highest amplitude is seen at the first frequency, it decreases in increasing modes. The airframe structural model's operational frequency must be 7.69 or 9.80 Hz to achieve sensitive vertical acceleration. Subsequently, it is aimed to develop an autonomous task by the implemented system controlled by various algorithm as a future work.

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In this study; a design to build study has been carried out for a self-balancing bicycle. Also support and rising up systems to bring it the equilibrium position in case of its fall are added. Finite element simulation of the bicycle frame is performed to get its dynamics and structural responses. Finally, an autonomous bicycle frame with self-balancing capability is designed. Self-balancing has been performed by means of a control momentum gyroscope including a single axis gimbal. The performance of the design has been evaluated for varying loading, driving speed and torque conditions. Implementation of this study with control algorithms will be performed as a future work. Bu çalışmada; kendi kendini dengeleyebilen bir bisiklet için bir tasarım çalışması yapılmıştır. Ayrıca düşmesi durumunda denge konumuna getirmek için destek ve kaldırma sistemleri eklenmiştir. Sonlu eleman simülasyonu yapılarak, bisiklet çerçevesinin dinamikleri ve yapısal tepkileri elde edilmiştir. Netice olarak, kendi kendini dengeleme özelliğine sahip otonom bir bisiklet tasarlarımı gerçekleştirilmiştir. Kendinden dengeleme, tek eksenli bir gimbal içeren kontrol torku jiroskopu ile gerçekleştirilmiştir. Tasarımın performansı değişen yükleme, sürüş hızı ve sürüş torku açısından değerlendirilmiştir. Bu çalışmanın kontrol algoritmaları ile uygulanması müteakip çalışma olarak planlanmıştır.