I'm using my code to do position control with the Intel drone. First make the drone enter the ofboard mode, and then arm the drone. Then let the drone fly to a certain hight. This is the same code, which worked in my previous tests. Now when the drone is armed, the sound of the rotating motors is strange, just like it's vibrating instead of the fast wind sound which happens when the drone takes off. It's like the motor speed is very slow and the sound is abnormal, and the drone cannot fly up. Is that I set some parameters wrong in QGC so the speed of the motors is limited?