Dedicated sections: Requirements, Documentation, Mechanics, Electronics, and Software
Please note. You can post Italian, English, German and Spanish language comments. English is the language to prefer.
ALTERNATIVE APPROACH SUGGESTED BY MT: Instead of making a whole redundant servo from scratch. Provide a PCB that reads signals from the receiver and drives two/more standard RC servos, the board have also access to real-time position of the servos (pots?) You find a editable diagram here.
TO CHECK: Redundant gear train by NASA
What if a servo fail?
Reliability is a primary feature of actuators. No matter what vehicle are you using, a fast RC Jet, or a monster RC Car, soon or later you will think about safety 🙂
RC Modellers have tried different solutions to achieve a certain degree of actuators redundancy. Speaking of standard solutions there are a couple of common approaches
- Use two servos on the same control surface
- Use two servos mechanically bonded
![](https://www.basicairdata.eu/wp-content/uploads/2020/01/Elevator-servo-doubler-1024x836.jpg)
Besides the failure of the servo motor, it is also possible that the servo drains a huge current amount, or worst that the power lines are shorted together; let’s call it an electronic failure.
![](https://www.basicairdata.eu/wp-content/uploads/2020/01/hqdefault.jpg)
If a servo short the power lines the voltage to other devices, including radio, will go immediately to 0 V. That will cause a total failure of all the installed servos.
![](https://www.basicairdata.eu/wp-content/uploads/2020/01/647.jpg)
To avoid this later issue it is possible to install commercially available servo interfaces or powerboxes.
So what?
Basic Air Data team is thinking about to release a DIY design of a redundant servo. Anyone is free to join the development! We will update this page as we proceed
Interessant solutions and suggestions
Do you know a good solution, even a commercial solution? Post here your link!
0 Comments