2015 Electric Race Quadcopter Trial Progress Poster

AL缳冤

2015 Electric Race Quadcopter Trial Progress Poster [Copy link]

Senior year, senior year, senior year... My exam scores were not high during school, so I didn't get into graduate school, and I was not allowed to take the postgraduate entrance examination, so I concentrated on my graduation project. I participated in two electrical competitions and one aviation competition, but I only won the second prize in the provincial competition this year, a frequency meter. I am interested in quadcopters, and I plan to use this year's (2015) topic as the topic of my graduation project. I will post the process here. My personal ability is limited, and it may take a long time to work on it. I hope everyone can give me more advice.

人民币的幻想

Support the OP, come on :)

飞鸿浩劫

“Graduate school entrance exams are not allowed” and there is such a rule?

AL缳冤

The college has some stuff left over from the electronic competitions in recent years, a bunch of development kits, 51, boards, wires, etc. It just so happens that the teacher I follow is in charge of these items. I originally thought that I could take them to play with by talking to the teacher, but later I found that there were not many quadcopter stuff in it, and most of them had to be bought by myself. First, I got a new Sidda ESC and a new Sidda 2212 motor, as well as the development board provided by Renesas in the 2013 electronic competition, RL78 or R5F100LEA. I heard that the new Sidda ESC is not easy to drive, so I came back to learn first.

nmg

Welcome to share

AL缳冤

Feihong Haojie posted on 2015-11-20 15:07 “Not allowed to take the postgraduate entrance examination”, there is still such a rule?

National defense students, only

AL缳冤

I'll post the project first. I've already returned the ESC of Xinxida to the teacher. I fiddled with it for a few days to get the motor running. The principle of the program is very simple. Set a Multiple PWM output with a frequency of 50Hz (cycle 20ms), one master, four slaves, and the duty cycle of the slaves is 3%. Because I saw a sentence saying that the high level is about 0.7ms (duty cycle 3.5%) when the throttle is minimum, and the maximum throttle does not exceed 1.6ms (8%). So I first added a duty cycle of 3%, which is lower than the minimum throttle of 3.5%, and accumulated it 800 times. Each time, the four TDRs were added by 1. After adding, the duty cycle was 5% (regarding the calculation of this, RL78 comes with a 32M crystal oscillator, and each machine cycle is 16 crystal oscillator cycles = 16/32m = 0.5us, so the value of TDR00 in timer.h is 39999, and TDR01, 02, 03, and 04 are all 1200, adding 800 is 2000, which is exactly 5%). The output pins of the four PWM signals are 40/39/21/3 respectively. I am too lazy to solder the reset. When using an oscilloscope to detect the waveform, I first hook it on the pin, and then power it on. You can clearly see that the duty cycle has soared all the way (of course, it is not much). I have a question. When using the for loop to delay, I don’t understand how much each execution can be delayed. Can the master answer me? It’s simple, don’t spray...

AL缳冤

http://download.csdn.net/download/u014686532/7279505 I modified it based on this. There are a lot of low-key experts on CSDN. If you infringe, please delete. . .

AL缳冤

That's all about the ESCs of Xinxida. Next, I bought F450 frame, Tiandifei 7 remote control receiver, flight controller, 3S battery, balance charger, and 4 Hoying 30A ESCs (I felt like a rich guy all of a sudden). Hoying ESCs are really easy to use. After unpacking, connecting the receiver and motor, it whirred to 0.0 as soon as I pushed the throttle. Now, I almost understand ESCs. As for the various powerful functions of Hoying, I will study them slowly in the future. I've been playing with mpu6050 these two days. I'll share my results when I have them.

nmg

AL缳怨 posted on 2015-11-20 22:57 That’s all about the new Xida ESCs. Next I bought an F450 frame, a Tiandifei 7 RC receiver, a flight controller, 3S batteries, a balance charger, and 4 Haoying 30A ESCs...

I’m posting this in the upper floor, so it’s not easy for people to notice it.

nmg

It is recommended that the host post it in multiple posts, serial style

nmg

AL缳怨 posted on 2015-11-20 20:58 National defense students, that's all

The national defense students in our school seem to be asked to take the postgraduate entrance examination

epsonlq138

May I ask which school the OP is from? I am also tall, rich and handsome~ Looking for communication

zb495203317

The original poster, I have a very similar experience to yours! I am a senior in college, and I am also working on a quadcopter recently. I am planning to try the tracking one. Please share your experience~

在远方

I'm a newbie here to watch. I'm going to be a junior soon, and I'm a second-rate undergraduate majoring in physics, but I'm more interested in this~~~

THS3201

How is the host doing now? :time: