¡Bienvenidos al blog de UEM-Solar UAV!

Este proyecto incluye varias asignaturas del Grado de Aeroespacial de los cursos 2020 - 2021 y 2021- 2022. El objetivo es desarrollar un UAV Solar que pueda volar más de un día. Lo que técnicamente se conoce como un UAV LAHE (Low-Altitude High-Endurance).

Este blog servirá de comunicación y de escaparate del proyecto.

Siendo un punto de potencial colaboración con otras instituciones y empresas.

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First electric calculations Objectives. Obtain the first design of an electric system incorporating the photovoltaic cells and the batteries. Learn what is the current-voltage curve of a solar panel. Learn the main characteristics of the PWM charger and the MPPT charger. Learn the variation of the current-voltage curve with the temperature. Combine these calculations with the André Noth Thesis analysis and check if the actual electric system can support the chosen design. Procedure. Check the provided Excel file  Calculations with the cells and batteries datasheet.  Check the temperature analysis following this document:  Technical Inforrmation Write a report justifying the calculation. Pay special attention to the "Check List" section. We will talk about this task in class. Let's do it! First, batteries. For the report: Check that batteries data from the datasheet is OK in the table.  Include the figure below (or one of better quality... 😉) and draw a block specif...
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Choosing the UAV model (characteristics)

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Let's start working on the selection of the UAV model following this methodology: Task 1.1 - Analysis of the main characteristics. We are going from the work of André Noth in his Doctoral Thesis [3] that we have renamed as  3 -Conceptual_Design_of_Solar_Powered_Airplanes_for_continuous_flight.pdf" ". In chapter three of this Thesis, an analytical method is introduced to determine the viability of a solar UAV. That method is implemented as a MATLAB program, which solves a third-degree polynomial equation to determine design feasibility. The code is comprised in the following files: Main.m, InitParameters.m, EvaluateSolution.m and MinimumPositive.m available in  Deciding the model . The first thing we will do is study both chapter three of the Thesis and the code (see the figure that describes the code below).    In this course 2023 -2024, together with the third-year (junior) students, we decided to build a UAV with a wingspan of b=3m and an aspect ratio of AR = ...
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Defining the power and propulsion subsystems Let's first choose an aircraft configuration. In this our first Solar UAV, we are going to use Sky-Sailor [1] as the basic prototype. Therefore, we need to set its specific wingspan (3.240m) and aspect ratio (12.9) in Noth's MATLAB code. Electric power. For defining the electric power subsystem, we are going to follow this procedure: 1. We need to determine the day duration and maximum intensity for the month of July. 2 Adjust the MATLAB Code for the wingspan and aspect ratio of the plane. 3. Execute MATLAB Code and get all data of the only solution in the table, for "a" equal to 1.00. 4. Now, check that the Electric design (Excel calculations meet the required mass, area, power and energy). Adjust them if required. 4. Select an MPPT device for Lithium batteries from this list  https://genasun.eu/collections/genasun-lithium-mppts  check its MATLAB parameter k_mppt = Weight/Power. A good comparison of the different lithium b...
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