If a ball stopsrolling while a robot is moving, or a ball does not rebound when rolled into a robot, it is a good indication that the ball is trapped.
机器人移动时球停止滚动,或是球滚动撞到机器人身体时没有回弹,这就说明球是被圈住的。
2
If a gyro is used to measure the rate of rotation around the aircraft roll axis, it will measure a non-zero value as long as the aircraft is rolling, but measure zero if the roll stops.