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Experimental determination of the liquid influence on an oscillating body
Grešáková, Kristýna ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
Damping and natural frequency of a vibrating body or a system is not easy to estimate during the design phase of~project. If the body is submerged in water, estimating becomes even more complicated. This~work focuses on experimental determination of the liquid influence on an oscillating body. The~presented modal analysis was executed on two bodies when being surrounded by air, but~also when gradually and fully submerged in water using two reservoirs with different dimensions. The collected data was analyzed with a suggested hybrid method, which determined the damping ratio and the natural frequency. Added mass was calculated employing the Ansys software. Part of the presented work focuses on the selection of a suitable time window for the Fourier transform.
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Verification of geometry influence on dynamic properties of immersed body
Černý, Tomáš ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
Immersion of the body into the fluid creates additional effects which must be considered when designing the machines. Additional effects from the fluid influence the dynamic properties of the body. In this work the decrease of the natural frequency and the increase of the damping ratio during the gradual immersion of the body into the fluid are investigated. Diploma thesis is based on an experiment, which is performed on a series of flat strip steel components of various widths. The first three bending and first three torsion shapes of the free-hanging body are examined. Emphasis is placed on the influence of part width. In the next phase of the experiment, the influence of the proximity of the solid wall to the dynamic properties of the cantilever beam is examined. Further, the determination of the added density from the fluid is performed by modal analysis using the ANSYS software.
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Using a Hybrid Method for Control the Storage Capacity of the Dam Reservoir
Pospíšilík, Šimon ; Kozel, Tomáš (referee) ; Menšík, Pavel (advisor)
Bachelor thesis is focused on the selection of a suitable input regional climate model into the Hybrid method for the control of the storage function of water reservoirs. This control method is based on a suitable combination optimization method with the Support vector machines method. Selecting a suitable regional climate model is done by simulating the control of the storage function of water reservoirs Vír I in program Microsoft Exel. The simulation results of the hybrid control method are compared with other control methods. These methods are Adaptive control, Dispatcher graph, and control to Improved outflow.
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Drone localization and navigation in a familiar environment without GNSS
Pintér, Marco ; Janoušek, Jiří (referee) ; Raichl, Petr (advisor)
This thesis is aimed at development of the localization system without using GNSS. The first part describes technologies, enable determination of position in the area. Methods for determining distance between transmitter and receiver are also described. In the next part of the thesis describes ROS communication form with flight controller PixHawk. On the basis of the acquired knowledge is described choosage of preferred technology and method of determination of the distance between transmitter and receiver.
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Drone localization and navigation in a familiar environment without GNSS
Pintér, Marco ; Janoušek, Jiří (referee) ; Raichl, Petr (advisor)
This thesis is aimed at development of the localization system without using GNSS. The first part describes technologies, enable determination of position in the area. Methods for determining distance between transmitter and receiver are also described. In the next part of the thesis describes ROS communication form with flight controller PixHawk. On the basis of the acquired knowledge is described choosage of preferred technology and method of determination of the distance between transmitter and receiver.
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Verification of geometry influence on dynamic properties of immersed body
Černý, Tomáš ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
Immersion of the body into the fluid creates additional effects which must be considered when designing the machines. Additional effects from the fluid influence the dynamic properties of the body. In this work the decrease of the natural frequency and the increase of the damping ratio during the gradual immersion of the body into the fluid are investigated. Diploma thesis is based on an experiment, which is performed on a series of flat strip steel components of various widths. The first three bending and first three torsion shapes of the free-hanging body are examined. Emphasis is placed on the influence of part width. In the next phase of the experiment, the influence of the proximity of the solid wall to the dynamic properties of the cantilever beam is examined. Further, the determination of the added density from the fluid is performed by modal analysis using the ANSYS software.
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Experimental determination of the liquid influence on an oscillating body
Grešáková, Kristýna ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
Damping and natural frequency of a vibrating body or a system is not easy to estimate during the design phase of~project. If the body is submerged in water, estimating becomes even more complicated. This~work focuses on experimental determination of the liquid influence on an oscillating body. The~presented modal analysis was executed on two bodies when being surrounded by air, but~also when gradually and fully submerged in water using two reservoirs with different dimensions. The collected data was analyzed with a suggested hybrid method, which determined the damping ratio and the natural frequency. Added mass was calculated employing the Ansys software. Part of the presented work focuses on the selection of a suitable time window for the Fourier transform.
|
|
|
Using a Hybrid Method for Control the Storage Capacity of the Dam Reservoir
Pospíšilík, Šimon ; Kozel, Tomáš (referee) ; Menšík, Pavel (advisor)
Bachelor thesis is focused on the selection of a suitable input regional climate model into the Hybrid method for the control of the storage function of water reservoirs. This control method is based on a suitable combination optimization method with the Support vector machines method. Selecting a suitable regional climate model is done by simulating the control of the storage function of water reservoirs Vír I in program Microsoft Exel. The simulation results of the hybrid control method are compared with other control methods. These methods are Adaptive control, Dispatcher graph, and control to Improved outflow.
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