I often watch the flight video on MK's website. The stability of the four-axis flight is really good. It is really cool. In the end, I couldn't resist the temptation. Under the impulse, I decided to do it myself. Collecting information from the Internet, everything starts from 0. After several months of stop-and-go, we have completed the design of brushless ESC, four-axis rack, multi-channel remote control, IMU module and flight control board. It’s small and fruitful, and it’s announced to communicate with everyone to make progress.
Due to the limitation of the level, only the MCU of the 51 architecture is familiar and used, and all modules of the system are based on the C8051F. However, the principles and control theories involved in the four axes are the same principle. I hope that the children's shoes will be enlightened and guided. Thank you! ! !
1. Two hard drives bought from the old stalls
2. It took a lot of effort, and finally transformed a screwdriver for the mobile phone, and got it.
The rack is intended to be equipped with the existing electric straight tail pipe and the pipe base with the hard disk. The motor uses the new Sida 2212 KV930, and the two positive and negative counters use the German EPP1045 with good reputation.
3. Fix the seat of the straight tail pipe, so expensive.
4. Fixed the seat of the straight tail pipe, so expensive.
5. And the motor and tail tube of the hand are combined.
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6. 4 motor mounts for external machining
7. The main part of the body is completed
8. A powerful tool for processing racks
9.EPP1045
10. One positive and one reverse
11. Compared with the positive paddle of 3 yuan on the market
12. Fix the two-bladed paddle with the original paddle protector of the motor
13. Solder the banana head, feel the weight is not small, leave a shadow before dismantling
14. Motor mounting and fixing method
15. Overall structure of the rack
16. Head-up angle, very stylish
17. The whole machine completes the rendering
Ok, the rack is complete. Next is the transformation time of the remote control, bought a cheap and large FT06-C, ready to change the 6-pass to 8-way, add two proportional channels, and equipped with LCD screen for display control Related parameters. The controlled tuner is still reserved, and the PPM encoder board is replaced by the whole.
18. Ready to take the toss of the world to fly 6C control
19.FT06-C internal structure
20. Add an LCD screen at this position
21. Call back the template, save this province ¥¥
22. The hook knife specially bought for the board
23. It took more than an hour to get it!
24. Remove the original PPM board controlled by FT06-C
25. Below the position, very punctual :)
26. This position of FT06-C can just put in a 5110 screen.
27. LCD board PCB
28. Expected results
29.PPM control board is welded
30. Look at the back. The bottom power supply is misplaced when being factory-made
31. Newly arrived 5110LCD screen
32. I did not pay attention to the wiring, and reversed the direction of the LCD:-(
33. The LCD screen is lit successfully
34. How is the effect :)
35. Install the right potentiometer
36. Right
37. Install the left potentiometer
38. Left
39. Connection of liquid crystal and potentiometer
40. Two potentiometers added
41. The knob is installed.
42. Increased potentiometer knob height
43. Engineering mode, calibration rocker neutral point
44. When working, the PPM effective value of the first 6 channels is displayed.
45. Output the measured 8-channel PPM waveform from the receiver
46. ​​Test flight test in G3.5
The aerial photography must pay attention to safety, and the loss of the aerial camera is large. On the one hand, on the other hand, if the aerial camera falls and falls, it may cause serious danger to people. Compared with helicopters, there are many mechanical parts, many fault points, large paddles, large overall weight, multi-axis aerials, many propellers, and few mechanical parts. Most of them are controlled by electronic equipment. "There is airflow between the propellers. Under high-frequency vibration, the propellers are inevitably broken. Then the "propeller" situation will occur. The broken oars will fly out and have almost no damage with the leaves. However, the aircraft will lose balance and cause falling. Machine. If the "shooting paddle" is found at a higher altitude, the throttle can be pushed immediately, and the speed of the aircraft can be reduced due to the force.
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