Did you notice that the car “trembled” while turning?
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- #761
- 09 Mar 2018
This happens because in a turn the inner wheels and the outer wheels go a different distance as a result of which they move at a different speed:
On the other hand, both rear wheels are connected to the motor which means they move at the same speed. What seems like trembling to you is actually the effect from the slip of the inner wheel.
To avoid that, cars use a differential (or they have one-wheel drive ). In the next lessons we will focus on these two cases.
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons
Level C1. "Transportation". Robotics with LEGO
This is the fifth level in the Robotics with LEGO curriculum for students in third or fourth grade.
For the first time robots with steering wheels are built in this level. Those robots use one or two drive motors. The work of the differential and its usage in vehicles is explored. Students learn in-depth the working of the light sensor to create better line-following programs. The first two-wheeled motorcycle-robot is built.
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Lesson 1 - Steering chasis
Introduction
In this level we will construct a lot of different vehicles. In the next several lessons we will build cars with various types of drives.
What makes the robots that we've build so far, different from the cars?
One of the differences is that cars have four wheels. The other difference is that cars have on engine/motor while our robots have at least 2 motors. The last important difference is that cars have a steering wheel and turning wheels. Our robots are quite small to have a steering wheel constructions, but we can attach one medium motor for a steering wheel and program the robot.
In todays lesson we will focus more the construction and how it is moving than on the programming.
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