Unmanned aerial vehicle (UAV) is a kind of unmanned aerial vehicle which has power, can be controlled, can carry a variety of mission equipment and can be reused. Nowadays, civil consumer UAVs are more and more loved by people. There are so many UAV brands on the market that it hurts to see them. It’s better to make an aircraft by yourself. The following small series will introduce you to the six axis aircraft production tutorial.
Idea: at present, the mainstream unmanned aerial vehicles in the market are four and six axes. Considering the needs of aerial photography, stability and wind resistance in the future, it is decided to use the six axes. The rack adopts DJI brand; Flight control must be used well. I don’t want to blow up the aircraft. I also use DJI naza-m and GPS; The original E300 power package is relatively stable but weak. 2216 810kv motor and 30A opto electric regulation are used, and 1045 propeller is used to increase power output; Tiantianfei 8-channel remote controller plus 9-way reception; One TCB 3S 5200 / 2200 battery; Invincible 190fpv multipurpose tripod; And b6ac balanced charging, T-plug expansion board, led heading light belt and other supporting parts.
Process: electrical assembly is relatively simple for a person with liberal arts background but strong hands-on ability. It should be noted that the idea of each step paves the way for the next procedure. During the welding of the banana head of the motor, the heat shrinkable pipe package was too long, resulting in excessive compression of the wire when installing the upper arm. Only fennel blistering was asked to help remove and repack it. Other parts are basically not reworked, and can be assembled in strict accordance with the assembly requirements of each part. It should be noted that the difficulty of the whole process is that the installation of remote control and main control programs seems simple, but in fact, there are too many debugging needs, and mistakes may occur if you are careless.
————This is all the accessories
————2216 motor needs to weld banana head by yourself
————Self made simple welding table, pay attention to the length of heat shrinkable pipe
————Base plate welding
————Use glue stick to seal the welding point
————The boom and motor shall be numbered respectively, and the positive and negative rotation directions shall not be wrong
————Install the motor
————Secure with screw glue
————Because of my wrist discomfort, fennel blisters in the installation arm
————The fuselage is basically assembled, and the circular object is GPS with directivity
————Receiver at the bottom, incoming line to flight control
————Fennel is bubbling
————Invincible 190 landing gear, need to be assembled
————Customized led heading light belt
————Night navigation effect
————After all the assembly is completed, the aerial pan tilt is required
The first test run was on the night of assembly, in the street behind the community, with dense buildings. As the GPS was not calibrated, the lever tumbled, a paddle clamp was lost and a set of paddles were discarded. While waiting for the paddle clip express, it was found that the naza-m Lite main control hardware adopted was no different from V2. Then it was studied to brush in the V2 4.02 firmware and re connect the power. It was found that star search was indeed faster, which laid a foundation for OSD and three-axis PTZ in the later stage.
About 4 days after the second test flight, the V2 firmware was preheated at 2.5 ring green space. After power on, the V2 firmware was preheated for about two minutes. Then the compass was calibrated horizontally and vertically, and the 50% throttle took off smoothly. Because the power kit was slightly stronger than the original, the operation sensitivity seemed to be greater. Except that there was no response when flying to the right side, everything was normal. It can be suspected that the problem was in the remote control setting. The LED flashed red in about 5 minutes. It was suspected that the satellite signal was lost and the oil collection dropped quickly.
The location of the third test flight was selected in the open area of a block. The preheating, star search and proofreading were very smooth. 2200mAh battery test flight, fine tuning was smooth in all aspects, the return position was correct in GPS attitude mode, there was a red light in about 5 minutes, and landed. It is found that the battery is hot and the motor is slightly hot, which are acceptable. After 3 minutes of rest, change to 5200mAh to test the large-scale performance and flight time. Draw a circle with a radius of 50m. I don’t know much about intelligent direction control. I’ll study it later. It is found that there will be a small offset in the left and right steering, and it will automatically return to the right after the intervention of GPS. The flight test sensitivity was increased by 10, which felt just right. Finally, after about 11 minutes, the voltage drops to the second level warning value and returns to drop. I found a lot of this situation in my homework. It is inferred that the level of IMU was not correct during proofreading. Fortunately, there was a simple level and it was corrected again.
The fourth test flight will be carried out the next day. Try the four-way operation after climbing more than 100 meters vertically, everything is perfect. So far, the whole project has come to an end.
Conclusion: DIY of unmanned aerial vehicles is generally not difficult. It requires certain electrical hands-on ability and software debugging technology, and more patience and meticulous.