无人机PX4学习(1)
时间:2022-12-26 02:30:00
内容源自:PX4飞控用户手册
链接:https://docs.px4.io/master/en/
Basic concepts
Drone: an unmanned "robotic" vehicle that can be remotely or autonomously controlled.
无人机的大脑:autopilot(自动驾驶仪)组成:flight stack(飞行栈) software running on flight controller (hardware)
PX4: a flight stack
QGroundControl: 将PX4加载到飞机控制硬件中,完成各种功能(设置参数、创建任务等)
Flight Controller Board(飞控板):选择适合您的飞机的飞控板。PX4目前可在Linux运行计算机或其他硬件
Sensor: 最小配置:陀螺仪、加计、指南针、气压表GPS(或其它定位系统)、空速传感器(固定翼等)
Outputs (motor, servo, actuators):输出口分为main和 aux ,一般有6到8个口。main用于核心飞行控制,aux一般用于非关键执行器/载荷等。飞行控制输出为PWM/Dshot/One-shot。
Dshot协议介绍https://blog.csdn.net/zhengningwei/article/details/79815281?ops_request_misc=%7B%22request%5Fid%22%3A%22165518363216781818740233%22%2C%22scm%22%3A%2220140713.130102334..%22%7D&request_id=165518363216781818740233&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-79815281-null-null.142^v14^pc_search_result_control_group,157^v14^new_3&utm_term=Dshot&spm=1018.2226.3001.4187
One-shot协议尚未发现
ESCs & Motors:PX无刷电机一般由飞行控制器通过ESC(电调)驱动。
Battery: LiPo battery. Use a Power module or a power management board
Joystick controller(手动操纵杆)
Safety switch:解锁安全开关可启动无人机
Data/Telemetry Radios(数传电台):地面控制站和PX连接,实时监控。
Companion Computer(机载计算机): PX4.机载计算机电缆或WiFi连接
SD cards: 最大容量为32GB,许多功能要求SD卡插入。
Arming and Disarming:PX4定义了三种状态:锁定、预锁定和解锁。只有在需要时才能解锁,还有一些默认设置(在解锁后一定时间内自动锁定),以确保安全。
Flight Modes:自主模式 &手动模式。手动模式也有一些细分模式,但不同型号的配置会有限制。
Safety Settings(安全设置及故障保护):问题一旦开始failsafe代码,如
- low battery
- Remote Control (RC) Loss
- Position Loss (globle position quality is too low)
- Offboard Loss
- DataLink Loss (e.g. loss telemetry connection to GCS)
- Geofence Failsafe (场地限制人为设置)
- ……
Headings & Directions: x y z方向旋转分别称为 roll pitch yaw
即使多旋翼直升机完全对称,也分为方向。制造商经常用颜色来标记。
生词学习:
cargo n.货物
The boat calls at the main port to load its regular cargo of bananas.
船停泊在大港,装载着香蕉的常规货物。
cargo drones n.货物无人驾驶飞机
hardware n.硬件、设备、设备
computer hardware hardware store 五金商品店
telemetry n.遥感技术,遥感勘测
< style="margin-left:0;text-align:justify;">Telemetry is the science of using automatic equipment to make scientific measurements and transmit them by radio to a receiving station.firmware n.固件
peripherals n.外围设备(外设),周边设备
peripheral adj.次要的,附带的,外围的 n.外设
Companies are increasingly eager to contract out peripheral activities like training.
公司越来越渴望把像培训这样的次要活动外包出去。
payload n.有效载荷,有效负荷
payload capability 有效载荷能力
forum n.讨论会,讨论区,论坛
The forum is now open to all budding entrepreneurs.
该论坛现在向所有崭露头角的企业家开放。
novice n.初学者,新手
I’m a completely novice at skiing.
non exhaustively 非详尽的 不完全的 These include (non exhaustively): balabala……
gyroscope n.陀螺仪
barometer n.气压计,气压表
airframe n.机身
output mapping n.输出映射
VTOL vertical take-off and landing 垂直起降的(飞机)(也就是直升机)
ESC Electronic speep controller 电子调速器(电调)
joystick n.操纵杆,控制杆
propeller n.螺旋桨,推进器
tune v.调整,调谐,调频道,(给乐器)调音
This makes it possible to tune parameters while a vehicle is in flight.
bench test n.小型实验 台架实验