Having delved into how BLDC motors operate and provided an overview of trapezoidal sensorless control, we can bring it all together in the design of an Arduino ESC shield. This turned out to be much harder than we expected - now we know why no-one does it!
This series of articles was sponsored by PCBWay.
#arduino #shield #ESC #bldcmotor
https://reefwing.medium.com/an-arduino-nano-electronic-speed-controller-esc-part-1-4f65076fb2e4
In Part 9 of our series on "How to write your own Flight Control Software", we describe how to control the ESC and brushless motors to get the desired drone orientation.
Our latest article on "How to write your own Flight Controller Software" is available on Medium. This article covers the Attitude and Heading Reference System (AHRS), IMU Filters and Sensor Fusion. We have released the open source Nexgen AHRS Arduino library to demonstrate these techniques on the Nano 33 BLE.
https://reefwing.medium.com/how-to-write-your-own-flight-controller-software-part-7-64daef8299ee
LiPo batteries are great for drones but you don't want to over discharge them. To allow our Flight Controller to monitor battery capacity we used a non blocking scheduler and packaged our requirements up as an Arduino Library, NexgenTimer.
There are a number of libraries that make working with the LSM9DS1 IMU (Inertial Measurement Unit) easy. In Part 5 of our series on writing your own flight controller software we will focus on the IMU and in particular explain the best ways to convert the gyro rate and accelerometer force data to a roll and pitch angle. The yaw angle is then calculated using the pitch and roll and magnetometer data. This discussion, is in the context of building a drone flight controller based on the Arduino Nano 33 BLE. https://reefwing.medium.com/a59bf9ed8c69
