"As long as standing in the wind, pig can also fly", because this sentence, how many people are busy looking for the wind, the time, Intel's huge investment to China Drone Manufacturer Yuneec, causing widespread attention, whether no one Will the machine will be the next hot-fried field? In fact, the development of drones has now been in nearly 100 years. It has always been limited by factors such as technology and policies. The speed of drone has been slow and mainly concentrated in military fields. It is true, that is really high. The things, and recent years, benefited from the development of micro-electromechanical control technology, a novel drone product is born, that is, the current four-axis aircraft, and this time During the country, there is also a DIY tide of a four-axis aircraft, and today's love board is to recommend a four-axis flying conservation kit based on the new Tang Electronics.
Not much to say, directly above, let's first look at the four-axis flying control kit of the entire new Tang.
Easy packaging, in-box accessories include a M452 flight control motherboard, a N79E814 remote handle, two SSV7241 2.4G transmit receiving modules, a plate and a NU-Link ME download debugger.
It can be seen that the M452 Flying Control Suite provides a complete four-axis aircraft platform as we expected, and provides some core components, and the components such as motor, rack, electrical tones need us to buy, so The purpose of doing is nothing more than letting players go to DIY as needed.
Look at the new Tang M452 Flying Control Suite.
M452 flying control board
The M452 Flying Control Kit is designed to be very delicate, taking into account the layout on the four-axis rack, the electronic components on the flying board are expanded on the front side of the board. The interface is a DIY along the surrounding of the PCB board, various signal lines.
The main control of the flight control board is a new Tang NumiMRO M452 USB series microcontroller, based on the ARM Cortex-M4 processor, built-in DSP, and floating point arithmetic units, which can be better responsible for flight master function. At the same time, a flying panel is equipped with an electronic compass for judging the direction for a set high air pressure gauge and a stable MPU-6050 6 axis accelerometer / gyroscope.
In this simple explanation of the effects of each sensor in the four-axis:
The main role of the acceleration sensor is to provide a horizontal reference to the four-axis aircraft using gravity effects.
The gyroscope is used to measure the angular velocity, which reflects the change in its own angle.
The main role of electronic compass is to provide a directional reference for the four-axis aircraft to use the groundborn aircraft.
The main controller is specific to M452LG6AE USB, the maximum frequency is 72MHz, and the internal integration of 256KB Flash, 32KB SRAM, including ADC, DAC, PWM, USB2.0 OTG, Timer, Clock, UART, SPI, I2C and other functions.
The hardware system block diagram of the microcontroller is shown below.
Four corners of the flight control board reserve the positioning hole, allowing users to easily select the appropriate rack for secure.
In the DIY of the four-axis aircraft, the respective signal connections of the flight control board are shown below, we can see that in addition to several functional interfaces necessary for four-axis, the flight control board also reserves the Bluetooth serial port and can Access to more sensors Extending IO ports, very practical.
Remote control board
The remote control board of the M452 Flying Control kit is still quite "humorous", the board is directly the prototype of a remote handle, and it is also very easy to operate without the case. As can be seen from the figure below, the circuit of the remote control board is very simple, the main control is based on the new Tang N79E814 microcontroller, which is based on the 8-bit 51-series microcontroller. The function on the remote control board is very simple. Power switch, throttle remote sensing, direction remote sensing, buzzer, mechanical buttons, power indicator, debug interface, etc., meet basic usage requirements.
On the back of the remote control plate, we can see that it is used in the power supply of a dry battery in the remote, where the voltage supply main controller N79E814 is output by LD0 to 3.3V.
2.4GHz transceiver module
The wireless communication method uses the SSV7241 2.4G RF transceiver module of the southern Silicon Valley, there are two, one connected via the SPI signal remote control board, and the other to connect the M452.
If you look closely, you will find that work is indeed a bit rough. According to official introduction, the wireless communication distance between the two modules is about 50 meters.
Split board
The substrate is actually not good, it is only to give the power supply to each electrical tone, and can also be detected at any time by the signal connection of the flight control board in the M452 flight control kit.
NU-Link ME Download Debugger
The NU-Link ME download debugger is one of the new Tang Nu-link Debug Adapter, supports ICP project based on the SWD signal interface, users can use New Tang Numi ICP Programming Tool software for chip firmware updates, and also apply to chip firmware Mass production. And support third-party development tools such as Keil, IAR and other IDE tools.
DIY four-axis aircraft
In order to verify the new Tangfei control kit, the author changed the original four-axis aircraft, all of which used the new Tang M452's suite, as shown in the picture below, the effect looks good, but the rack is not specially selected. If it is fixed with the positioning column on the flight control board, it can only be temporarily fixed with double-sided cubicle.
In the new Tang's official forum, there is the latest Flying Control Firmware Source and Flying Control Parameters AHRS. The author currently sees only the code applied to Keil, the latest version is 1.42.
Download the NU-Link ME to download the debugger to the Five Control Board to download the compiled firmware.
Download is complete, ready to start testing.
After the lock of the flying control board, the throttle rod and the motor turned. (The remote control board can refer to the instructions for the new Tang four-axis kit)
I thought that when all OK, I found that the aircraft was prone to side-rollout, no law, it seems that the default PID parameters provided by Xin Tang is not too matching with my aircraft. At this time, I think of the debugging software AHR adjusted with the new Tang AHR adjusted PID parameters .
Connect the serial port signal pin of the flying control board through the serial port. Open the AHR software and configure the corresponding serial port end.
Select the label of the PID column.
Noun explanation in the above figure:
YAW: Turning Circle
PITCH: Rolling before and after
Roll: Rolling around
Looking at the official introduction, PID is divided into two layers, 9 of the left is the PID of Level (ACC), the right side is the PID of Rate (Gyro), first by Rate P, try to increase the p value to not cause the body In the principle, then adjust the Level P value, then adjust the Level I value, try to increase the I value as the principle of not caused the body's shock, then adjust the Rate I value. The D value is no wind in the indoor, and the wind can be stunned slightly to increase the wind resistance, which does not cause the body oscillation. In addition to the adjustment of the PID parameters, the AHR software also includes parameter settings such as Altitude, VELICITY, CALIBRATION. Some regrets are that the author has not reached the state of the steady flight for a long time, and the body feels some shock. It is prepared to subsequently debug, and there is a result that the adjusted PID parameters will be supplemented here.
summary
Introduced and actually experienced the M452 Flying Control Suite in New Tang, the entire kit mainly based on the M452 Flight Control Board + N79E814 Remote Control Board + Southern Silicon Valley 2.4G SSV7241 wireless transceiver module, with New Tang's information, code, and software tools, etc. Users can easily implement the development and debugging of the board with NU-Link ME, the M452 Flying Control Suite is definitely a very good DIY four-axis aircraft development kit, but the author is recommended to have a certain understanding of the four-axis aircraft. User use, after all, the actual experience, the new Tang flying control kit is not a complete fool-style four-axis aircraft DIY kit, from getting up to want to really achieve stable flight difficulty or not small.
New Tang development board recommended
Oscreen / wearable application - New Tang Numaker TRIO development board evaluation
Positive function - New Tang NUEDU-SDK-M451 learning development kit evaluation
High level - New Tang Nu-LB-M451 development board evaluation
Original declaration: This article is originally created by the panel network, declined!
Our other product:
