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A quadcopter, also known as a quadrotor, is a multirotor helicopter that is lifted and propelled by four rotors.

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considered a non-holonomic system considering the fact that it cannot move freely compared to a quadcopter that is holonomic. I found this information from: What's the difference between a holonomic and a …
asked May 15 '16 by user123456098
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2answers
Good day, I am working on an autonomous flight controller for a quadcopter ('X' configuration) using only angles as inputs for the setpoints used in a single loop PID controller running at 200Hz … (PID Implementation is Here: Quadcopter PID Controller: Derivative on Measurement / Removing the Derivative Kick). For now I am trying to get the quadcopter to stabilize at a setpoint of 0 degrees. The …
asked Feb 2 '16 by user123456098
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Good day I am currently implementing an autonomous quadcopter with stereo vision using raspberry Pi. One (Let's call this Pi_1) is responsible for stereo vision the other is responsible for motor …
asked Jan 20 '16 by user123456098
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Good day, I am currently creating an autonomous quadcopter using a cascading PID controller specifically a P-PID controller using angle as setpoints for the outer loop and angular velocities for the … to move the battery backwards to compensate however due to the constraints of the DJI F450 frame it is still front heavy. In a PID controller for an asymmetrical quadcopter, the I-gain is responsible …
asked Feb 25 '16 by user123456098
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about is that when I was able to reach a 200Hz (0.00419ms) loop rate, when adding a D gain, the quadcopter seems to dampen the movements in a non continous manner. This was not the case when my algorithm …
asked Jan 26 '16 by user123456098
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Good day, I would like to ask why is it that when I add the Yaw control to my PID controller for each motor. The quadcopter refuses to take off or maintain its altitude. I am curently using a … quadcopter to be able to lift itself. The PID parameters for the Altitude Sensor is tuned with the other controllers active (Pitch and Roll). Possible Problem Limiter algorithm A possible problem is that …
asked Apr 14 '16 by user123456098
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Good day, I would like to ask how is it possible to use an ultrasonic sensor for altitude hold in a quadcopter if the sampling rate of the Ultrasonic sensor (HC-SR04) is only 20Hz before incurring …
asked Mar 2 '16 by user123456098
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Good day, Introduction I am currently working on an autonomous quadcopter project. I have currently implemented a cascaded PID controller consisting of two loops. The inner rate loop takes the …
asked May 26 '16 by user123456098
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1answer
Good Day, I am working on an autonomous quadcopter. May I ask if there is a significant difference if my control loop dropped from 500Hz to 460Hz due to added lines of code that would require …
asked Jul 25 '16 by user123456098
2
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its orientation immediately after turning few degrees (4-5 deg). However, it does not do so in a consitent manner. It also overcorrects. The reason behind my doubt is because the quadcopter doesn't …
asked Dec 11 '15 by user123456098
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I am currently implementing an autonomous quadcopter which I recently got flying and which was stable, but is unable to correct itself in the presence of significant external disturbances. I assume … , there is still the existence of a negative acceleration (eg. -0.0034). I computed the gravitational offset by setting the quadcopter to be still on a flat surface then collecting 20,000 samples from …
asked Mar 20 '16 by user123456098
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Good day, I have been reading papers about position integration from accelerometer readings. I have consulted this paper from freescale on how that is achievable and this article regarding leaky int …
asked May 3 '16 by user123456098
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jerkiness of my quadcopter and found the culprit which is the frequency at which my loop excecutes which is only about 14Hz. The minimum requirement for a quadcopter is 100-200hz. It is similar to … the issue he faces here Raspberry Pi quadcopter thrashes at high speeds He said that he was able to increase his sampling rate from 66hz to 200hz by increasing the i2c baudrate. I am confused on how …
asked Jan 17 '16 by user123456098
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Good day, I had been recently reading up more on PID controllers and stumbled upon something called integral wind up. I am currently working on an autonomous quadcopter concentrating at the moment … on PID tuning. I noticed that even with the setpoint of zero degrees reached in this video, the quadcopter would still occasionally overshoot a bit: https://youtu.be/XD8WgVFfEsM Here is the …
asked Feb 13 '16 by user123456098
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Good day, I have just finished tuning the Pitch and Roll PID's. I did this by setting the throttle such that the quad is weightless. I did the tuning of each axes separately. I would just like to ask …
asked Mar 4 '16 by user123456098

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