Product development with LinoPro (Part 3): The design phase

18.06.2020 - Max Hoehle

The aim of the design phase is to determine the optimal overall design and to define the product design based on the fundamental solution that has been developed so far. In an iterative process, the building structure is structured from a rough design and released for detailed construction. The individual parts and components are pre-dimensioned in a functional model ready for production.

< 2nd step: The feasibility analysis

 

The design requires many corrective steps, not least because of the large number of dependencies to be taken into account, and thus represents the greatest effort within the construction process Examples of dependencies that are often contradictory include: safety and technical requirements, material selection and material properties, applicable manufacturing processes, tolerances, assembly options, available standard parts, aesthetic design, total costs of material and production , total weight as well as maintenance and repair. This inevitably leads to compromise solutions.

 

The resulting draft of the overall assembly was used to dimension the drone, taking into account aerodynamically optimized rotor spacing and payload positioning optimized by means of a center of gravity calculation. When designing the individual assemblies, the focus was also placed on reliability, safety and maintenance. For example, only high-quality components that have already been tried and tested in practice were selected for the drive unit and control. The modular design is a great advantage both during assembly and in the event of service or maintenance. For example, the fully equipped arm for the motor mount can be changed within just 10 minutes if necessary.

This led to the definition of the following structure:

  • Main frame (consisting of top and bottom plate)

    • based on commercially available 5mm CFRP plates

    • 4 x 5000mAh LiPo (Lithium Polymer) batteries

    • Camera for positioning

    • Control electronics with GPS sensors and radio module

  • Arm with motor mount (Ø32mm hollow tube with 1mm wall thickness)

  • Landing Gear

    • 4 electrically height-adjustable feet

    • Ø24mm and Ø26mm CFRP tubes

    • landing skids made of aluminum

  • Unit of Buoyancy

    • 2 brushless Tiger motors type MN3520 KV400 per arm

    • 15 inch rotor blades

  • transport unit

    • Plastic transport box

    • 2 x 2 folding aluminum arms

  • aerodynamically optimized cover for the main frame and arms

Further information about our CAD services and experience in construction can also be found here . Talk to us, the construction office from LinoPro will be happy to help you.

> 4th step: The construction phase

 

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