An Arduino controls this unusual two-wheel steering e-bike
August twenty fourth, 2022—
James Bruton likes to experiment with uncommon automobile drive methods and configurations to learn how they carry out below the dynamic circumstances of real-world use. Inside combustion engines and driveshafts don’t have a tendency to slot in these autos, so Bruton typically makes use of electrical motors. He normally turns to Arduino to regulate the motors and skim the sensors in his contraptions. That is still true for his latest mission: an odd two-wheel steering e-bike.
Think about a bicycle, however with a rear wheel that additionally steers, and also you’ve acquired a fairly good concept of the idea. However it could be actually laborious to steer each wheels on the identical time, so Bruton got here up with a singular management scheme. The entrance wheel has free steering, like a typical bicycle. The again wheel has lively motor-driven steering. An encoder displays the angle of the entrance steering so the again steering can rotate in response. There are three modes: one which locks the rear wheel to imitate a typical bike, one which matches the rear steering to the entrance, and one which mirrors the rear steering relative to the entrance.
An Arduino Uno board handles all of those capabilities. Each the entrance and rear wheels have hub motors, and the rear wheel has an lively steering motor. The Arduino controls these by means of ESC (digital velocity controller) modules. It spins the 2 hub motors in line with a sign coming from a typical e-bike throttle on the handlebars. Energy comes from a LiPo battery pack. Bruton constructed the bike’s body utilizing a mixture of metal tube and 3D-printed plastic elements, with heavy obligation bearings for the steerer tubes and common bicycle saddle to sit down on.
Bruton reviews that this configuration handles fairly poorly and it in all probability isn’t one thing you’d wish to construct. However that’s okay, as a result of that is simply one other experimental automobile in Bruton’s storage and we’re at all times glad to see these.