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@ -1,561 +0,0 @@
### 一.前提知识
##### 数据格式
- IMU线性加速度、角速度、时间戳。
- uwb位置、时间戳。
- LightHouse位置、姿态四元数、时间戳。
- 融合数据:位置、姿态四元数、平面速度、角速度。
##### Lighthouse
在机器人定位系统中,"lighthouse" 通常指的是一种基于光学的定位技术,它广泛应用于虚拟现实 (VR) 系统中例如HTC Vive的定位系统。这种技术被称为“Lighthouse Tracking System”。
**Lighthouse Tracking System 的工作原理**
1. **基站发射信号**
- 系统包括多个基站(通常是两个),它们被放置在房间的不同位置。
- 基站会发射红外激光和同步闪光信号。
2. **激光扫描**
- 基站中的激光会沿水平和垂直方向扫描整个房间。
- 基站发射的激光束以已知的频率和角度扫描。
3. **传感器接收信号**
- 被追踪的物体例如VR头显或控制器上安装了多个红外传感器。
- 当激光束扫过传感器时,传感器会记录激光束到达的时间。
4. **计算位置和方向**
- 激光扫描一个完整的周期需要已知的时间(例如,假设为 T
![image-20240607153755424](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\lighthouse原理1.png)
- 角度到位置的转换
![image-20240607153823884](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\lighthouse原理2.png)
![image-20240607153911054](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\lighthouse原理3.png)
![image-20240613204029743](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\lighthouse原理4.png)
##### 卡尔曼滤波
卡尔曼滤波是一种线性二次估计算法,能够在存在噪声和不确定性的情况下,通过对状态变量的动态估计,得到系统的最优估计。
**卡尔曼滤波的基本步骤**
卡尔曼滤波器的操作过程可以分为两个阶段:预测阶段和更新阶段。
![image-20240613203928033](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\kalman滤波_预测.png)
![image-20240613203954828](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\kalman滤波_更新.png)
### 二.主要源文件
- type.h
**主要功能**:存储定位过程中的各种数据格式。
**示例**
- IMU融合里程计数据结构体
```cpp
struct Imu_odom_pose_data
{
Imu_data imu_data_;
double pose_[3];//位置
double quat_[4];//姿态四元数
double vxy_;//平面速度
double angle_v_;//角速度
Imu_odom_pose_data(){};
Imu_odom_pose_data( Imu_data imu_data,double x,double y,double z, double qw, double qx, double qy, double qz,double vxy, double angle_v):imu_data_(imu_data),pose_{x,y,z},quat_{qw,qx,qy,qz},vxy_(vxy),angle_v_(angle_v){};
};
```
- IMU数据结构体
```cpp
struct Imu_data
{
ros::Time imu_t_;
double a_[3];//线性加速度
double w_[3];//角速度
Imu_data(){};
Imu_data(double ax,double ay,double az, double wx, double wy, double wz)
:a_{ax,ay,az},w_{wz,wy,wz}{};
};
```
- uwb.cpp
**关联头文件**uwb.h
**头文件重要参数**UWB数据对象、互斥锁、基站信息。
**主要功能**初始化一些用于定位的锚点Anchor的位置信息初始化用于定位计算的矩阵通过串口读取UWB设备的数据对读取到的距离数据进行校正去除高度差的影响利用校正后的距离数据和预设的锚点位置计算目标点的二维平面坐标。
**UWB定位算法原理**
UWB超宽带定位算法主要通过测量目标点到多个已知位置的锚点的距离利用几何方法来计算目标点的位置
![image-20240606145817153](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\uwb定位原理1.png)
![image-20240606145837783](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\uwb定位原理2.png)
![image-20240606145941659](D:\robotkernal-uestc\Code\MowingRobot\pibot_ros\ros_ws\src\upbot_location\Note\Images\uwb定位原理3.png)
**4.矩阵表示:**
$$
A=\begin{pmatrix}
2(x_2 - x_1)& 2(y_2 - y_1) \\
2(x_3 - x_1)& 2(y_3 - y_1)
\end{pmatrix}
\\
B=\begin{pmatrix}
d_2^2 - d_1^2 + x_1^2 - x_2^2 + y_1^2 - y_2^2\\
d_3^2 - d_1^2 + x_1^2 - x_3^2 + y_1^2 - y_3^2
\end{pmatrix}
\\
A\begin{pmatrix}
x\\
y
\end{pmatrix}=B
$$
**主要函数**
##### 1. `Uwb::Uwb()`
- **作用**: UWB类的构造函数用于初始化一些变量和矩阵。
- **步骤:**
根据UWB定位算法中目标点的距离差方程来初始化系数矩阵A以便后续计算目标点坐标。
```cpp
for(int i=0; i<2; i++)
{
A.mat[i][0] = -2*(this->AnchorPos[0][0]-this->AnchorPos[i+1][0]);
A.mat[i][1] = -2*(this->AnchorPos[0][1]-this->AnchorPos[i+1][1]);
}
```
##### 2. `Run()`
```c++
void Uwb::Run()
```
- **作用**: 通过一个无限循环不断调用`Serread()`函数来读取串口数据。
##### 3. `Serread()`
```c++
void Uwb::Serread()
```
- **作用**: 用于从UWB设备读取数据并进行距离校正和位置计算。
- **函数过程:**
- 这个函数的主要工作包括:
- 初始化串口通信参数并读取数据。
```cpp
boost::asio::io_service io;
boost::asio::serial_port serial(io, "/dev/uwb");
//设置串口路径
serial.set_option(boost::asio::serial_port_base::baud_rate(115200));// 设置波特率
serial.set_option(boost::asio::serial_port_base::character_size(8));// 设置数据位
serial.set_option(boost::asio::serial_port_base::parity(boost::asio::serial_port_base::parity::none));// 设置校验位
serial.set_option(boost::asio::serial_port_base::stop_bits(boost::asio::serial_port_base::stop_bits::one));// 设置停止位
uint8_t tmpdata[9];
size_t bytesRead = boost::asio::read(serial, boost::asio::buffer(tmpdata, 9));// 读取串口数据
```
- 解析和校正读取到的距离数据。
```cpp
this->uwb_data_.uwb_t_ = ros::Time::now();
// for (int i=0;i< bytesRead;i++)
// {
// std::cout << std::hex<<static_cast<int>(tmpdata[i]) << " ";
// }
// std::cout << std::endl;
memcpy(&this->d[0], &tmpdata[3], sizeof(uint16_t));
memcpy(&this->d[1], &tmpdata[5], sizeof(uint16_t));
memcpy(&this->d[2], &tmpdata[7], sizeof(uint16_t));
// std::cout << "d:" << d[0] << " " << d[1] << " " << d[2] << std::endl;
if(abs(d[0]) > 2000 || abs(d[1]) > 2000 || abs(d[2]) > 2000) {
return;
}
for(int i=0; i<3; i++)
{
this->d[i] = sqrt(this->d[i] * this->d[i] - (AnchorPos[i][2] - CARHEIGHT) * (AnchorPos[i][2] - CARHEIGHT));//对距离进行校正,去除高度差影响,即目标点到锚点的水平距离(不考虑Z后续计算目标点坐标只需求X,Y)
}
//通过多项式校正原始测量距离的非线性误差。
d[0] = ((((4.9083e-07 * d[0]) - 4.6166e-04) * d[0]) + 1.0789) * d[0] + 5.4539;
d[1] = ((((-4.1679e-07 * d[1]) + 5.0999e-04) * d[1]) + 0.7930) * d[1] + 29.8296;
d[2] = ((((2.3514e-07 * d[2]) - 1.8277e-04) * d[2]) + 0.9935) * d[2] + 9.8852;
std::cout << "d:" << d[0] << " " << d[1] << " " << d[2] << std::endl;
```
- 利用校正后的距离数据和线性方程组求解目标点的二维坐标。
```cpp
for(int i=0; i<2; i++)
{
b.mat[i][0] = (this->d[0]*this->d[0]-this->d[i+1]*this->d[i+1])\
-(this->AnchorPos[0][0]*this->AnchorPos[0][0]-this->AnchorPos[i+1][0]*this->AnchorPos[i+1][0])\
-(this->AnchorPos[0][1]*this->AnchorPos[0][1]-this->AnchorPos[i+1][1]*this->AnchorPos[i+1][1]);
}
Mat AT=~A;
uwbPos=(AT*A)%AT*b;
this->uwb_data_.x_ = uwbPos.mat[0][0];
this->uwb_data_.y_ = uwbPos.mat[1][0];
```
- Mat.cpp
**关联头文件:**Mat.h
**主要功能**:实现了一个矩阵类 `Mat`,以及各种矩阵操作函数。这些函数包括矩阵的初始化、基本运算(加减乘除)、矩阵变换(转置)、高斯消元法求解线性方程组、矩阵的行列操作、以及一些向量操作。
**主要函数:**
- 矩阵求解(高斯消元法)
```cpp
Mat operator /(Mat a, Mat b) {
int x, xb;
for (x = 0; x < b.n; x++) {
double s = 0;
int p = x;
double sxb;
for (xb = x; xb < b.n; xb++) {
sxb = fabs(b.mat[x][xb]);
if (sxb > s) {
p = xb;
s = sxb;
}
}
if (x != p) {
a.ColExchange(x, p);
b.ColExchange(x, p);
}
double k = 1 / b.mat[x][x];
a.ColMul(x, k);
b.ColMul(x, k);
for (xb = 0; xb < b.n; xb++) {
if (xb != x) {
k = (-b.mat[x][xb]);
a.ColAdd(xb, x, k);
b.ColAdd(xb, x, k);
}
}
}
return a;
}
Mat operator %(Mat a, Mat b) {
int x, xb;
for (x = 0; x < a.m; x++) {
double s = 0;
int p = x;
double sxb;
for (xb = x; xb < a.m; xb++) {
sxb = fabs(a.mat[xb][x]);
if (sxb > s) {
p = xb;
s = sxb;
}
}
if (x != p) {
a.RowExchange(x, p);
b.RowExchange(x, p);
}
double k = 1 / a.mat[x][x];
a.RowMul(x, k);
b.RowMul(x, k);
for (xb = 0; xb < a.m; xb++) {
if (xb != x) {
k = (-a.mat[xb][x]);
a.RowAdd(xb, x, k);
b.RowAdd(xb, x, k);
}
}
}
return b;
}
```
重载了 `/``%` 运算符,用于求解矩阵方程 `AX = B``XA = B`,使用高斯消元法。
- 矩阵行列操作
```cpp
void Mat::RowExchange(int a, int b) {
double s[MAT_MAX];
int ncpy = n * sizeof(double);
memcpy(s, mat[a], ncpy);
memcpy(mat[a], mat[b], ncpy);
memcpy(mat[b], s, ncpy);
}
void Mat::RowMul(int a, double k) {
int y;
for (y = 0; y < n; y++) {
mat[a][y] = mat[a][y] * k;
}
}
void Mat::RowAdd(int a, int b, double k) {
int y;
for (y = 0; y < n; y++) {
mat[a][y] = mat[a][y] + mat[b][y] * k;
}
}
void Mat::ColExchange(int a, int b) {
double s;
int x;
for (x = 0; x < m; x++) {
s = mat[x][a];
mat[x][a] = mat[x][b];
mat[x][b] = s;
}
}
void Mat::ColMul(int a, double k) {
int x;
for (x = 0; x < m; x++) {
mat[x][a] = mat[x][a] * k;
}
}
void Mat::ColAdd(int a, int b, double k) {
int x;
for (x = 0; x < m; x++) {
mat[x][a] = mat[x][a] + mat[x][b] * k;
}
}
```
实现了矩阵的行交换、行乘标量、行加倍数、列交换、列乘标量、列加倍数等操作。
- read_sensor_data.cpp
**关联头文件:**read_sensor_data.h
**头文件重要参数:**里程计消息以及 IMU 消息指针、 IMU 数据订阅器和里程计数据订阅器。
**主要功能**读取IMU和里程计传感器的数据。
**主要函数:**
**IMU回调函数**
```cpp
void Read_sensor_data::imu_call_back(const ImuConstPtr& imu) {
Imu_data d1 = Imu_data(imu->linear_acceleration.x, imu->linear_acceleration.y, imu->linear_acceleration.z,
imu->angular_velocity.x, imu->angular_velocity.y, imu->angular_velocity.z);
}
```
这是一个IMU数据的回调函数当接收到IMU传感器的数据时调用。
- `const ImuConstPtr& imu`IMU数据的常量指针引用。
- 函数内部将IMU数据提取并传递给`Imu_data`对象`d1`。
**里程计回调函数**
```cpp
void Read_sensor_data::odom_call_back(const OdomConstPtr& odom) {
Odom_data d1 = Odom_data(odom->pose.pose.position.x, odom->pose.pose.position.y, odom->pose.pose.position.z,
odom->pose.pose.orientation.w, odom->pose.pose.orientation.x, odom->pose.pose.orientation.y, odom->pose.pose.orientation.z,
odom->header.stamp, odom->twist.twist.linear.x, odom->twist.twist.linear.y, odom->twist.twist.angular.z);
}
```
这是一个里程计数据的回调函数,当接收到里程计传感器的数据时调用。
- `const OdomConstPtr& odom`:里程计数据的常量指针引用。
- 函数内部将里程计数据提取并传递给`Odom_data`对象`d1`。
**运行函数**
```cpp
void Read_sensor_data::Run(int argc, char* argv[]) {
ros::init(argc, argv, "imu_odom");
// 创建一个节点句柄
ros::NodeHandle nh;
//imu_sub_ = nh.subscribe<std_msgs::String>("imu/data_raw", 1000, this->imu_call_back);
//odom_sub_ = nh.subscribe("odom", 1000, odom_call_back);
ros::spin();
}
```
这是类的主函数负责初始化ROS节点并订阅传感器话题。
- `int argc, char* argv[]`传递给ROS初始化函数的参数。
- `ros::init(argc, argv, "imu_odom")`初始化ROS节点节点名称为`imu_odom`。
- `ros::NodeHandle nh`创建一个节点句柄用于与ROS系统交互。
- `imu_sub_`和`odom_sub_`分别订阅IMU和里程计数据的话题被注释掉的代码行
- `ros::spin()`进入ROS循环等待回调函数的调用。
- lighthouse.cpp
**关联头文件:**lighthouse.h
**头文件重要参数:**lighthouse数据对象、读写锁。
**主要功能**通过UDP接收位置信息并处理这些数据真值数据
**主要函数:**
1构造函数`Lighthouse::Lighthouse()`
- **功能**:初始化`Lighthouse`对象创建UDP套接字并将其绑定到指定端口。
- **步骤:**
1. 输出启动信息。
2. 创建UDP套接字。如果创建失败则输出错误信息并返回。
3. 设置套接字地址结构`udpAddress`,指定协议族为`AF_INET`,地址为`INADDR_ANY`,端口为`PORT`。
4. 将套接字绑定到地址。如果绑定失败,输出错误信息并关闭套接字。
2运行函数`void Lighthouse::Run()`
- **功能**:启动一个无限循环,在该循环中调用`UDPRead`函数以读取UDP数据。
- **步骤:**
1. 进入无限循环,调用`UDPRead`函数。
3读取UDP数据函数`void Lighthouse::UDPRead()`
- **功能**从UDP套接字接收数据并解析这些数据以提取位置信息和方向信息。
- **步骤:**
1. 定义一个缓冲区`buffer`以存储接收到的数据。
2. 使用`recvfrom`函数从UDP套接字接收数据。如果接收失败输出错误信息并返回。
3. 将接收到的数据转换为字符串格式。
4. 解析数据字符串提取位置信息x, y, z和方向信息qx, qy, qz。固定`qw`为1.0。
5. 使用互斥锁`mMutexLighthouse`保护对共享数据的访问,更新`data`成员变量。
6. 打印接收到的消息(注释掉的部分)。
- align.cpp
**关联头文件:**align.h
**头文件重要参数:**用于接收IMU、里程计数据的话题订阅器、用于融合多传感器数据的中间矩阵、存储最终融合结果的数据对象。
**主要功能**实现基于IMU惯性测量单元和UWB超宽带数据的融合用于机器人位姿位置和方向的估计和同步。
**主要函数:**
1. `Align::Run()`
该函数是主处理循环,负责初始化订阅者,读取数据,进行数据处理和融合,并将结果保存到文件中。
- **初始化数据接收时间**
```c++
imuDataRxTime = ros::Time::now();
uwbDataRxTime = ros::Time::now();
```
- **订阅IMU和里程计数据**
```c++
imu_sub_ = nh_.subscribe("raw_imu", 10, &Align::imuCB, this);
odom_imu_sub_ = nh_.subscribe("odom_imu_ekf", 10, &Align::odom_imuCB, this);
```
- **打开文件保存数据**
```c++
std::ofstream outfile("/home/firefly/pibot_ros/ros_ws/src/upbot_location/data.txt", std::ofstream::out);
```
- **初始化卡尔曼滤波所需的矩阵**
```cpp
Mat prevPos(2, 1, 0);
Mat deltaPos(2, 1, 0);
Mat predPos(2, 1, 0);
Mat R(2, 2, 1);
Mat Q(2, 2 ,1);
Q = Q * 0.00001;
Mat P(2, 2, 0);
Mat F(2, 2, 1);
Mat Kg(2, 2, 0);
Mat Z(2, 2, 0);
```
- **设置初始位置**
```cpp
uwbStartPos.mat[0][0] = 9;
uwbStartPos.mat[1][0] = 0;
```
- **进入主循环,处理数据** 在主循环中不断检查IMU和UWB数据是否更新进行数据融合并通过卡尔曼滤波器计算机器人的同步位置。
```cpp
while(1) {
if(imuDataRxTime != imu_odom_.imu_data_.imu_t_) {
// 处理IMU数据
}
if (uwbDataRxTime != uwb_->uwb_data_.uwb_t_) {
// 处理UWB数据
}
}
```
2. `Align::imuCB(const pibot_msgs::RawImu& imu)`
该函数是IMU数据的回调函数用于接收和处理IMU数据。
- 更新IMU数据
```cpp
imu_odom_.imu_data_.imu_t_ = imu.header.stamp;
imu_odom_.imu_data_.a_[0] = imu.raw_linear_acceleration.x;
imu_odom_.imu_data_.a_[1] = imu.raw_linear_acceleration.y;
imu_odom_.imu_data_.a_[2] = imu.raw_linear_acceleration.z;
imu_odom_.imu_data_.w_[0] = imu.raw_angular_velocity.x;
imu_odom_.imu_data_.w_[1] = imu.raw_angular_velocity.y;
imu_odom_.imu_data_.w_[2] = imu.raw_angular_velocity.z;
```
3. `Align::odom_imuCB(const nav_msgs::Odometry& odom)`
该函数是IMU里程计数据的回调函数用于接收和处理融合后的IMU里程计数据。
- 更新里程计数据
```cpp
cppodom_tmp_ = odom.header.stamp;
imu_odom_.pose_[0] = odom.pose.pose.position.x;
imu_odom_.pose_[1] = odom.pose.pose.position.y;
imu_odom_.pose_[2] = odom.pose.pose.position.z;
imu_odom_.quat_[0] = odom.pose.pose.orientation.x;
imu_odom_.quat_[1] = odom.pose.pose.orientation.y;
imu_odom_.quat_[2] = odom.pose.pose.orientation.z;
imu_odom_.quat_[3] = odom.pose.pose.orientation.w;
imu_odom_.vxy_ = odom.twist.twist.linear.x;
imu_odom_.angle_v_ = odom.twist.twist.angular.z;
```

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@ -25,31 +25,30 @@ namespace uwb_slam{
imu_odom_StartPos.Init(2, 1, 0); imu_odom_StartPos.Init(2, 1, 0);
Rotate.Init(2,2,0); Rotate.Init(2,2,0);
uwbStartPos.Init(2,1,0); uwbStartPos.Init(2,1,0);
};//初始化多个mat };
void Run();//主运行函数 void Run();
void imuCB(const pibot_msgs::RawImu& imu);//在接收到IMU数据时调用处理IMU数据 void imuCB(const pibot_msgs::RawImu& imu);
void odom_imuCB(const nav_msgs::Odometry& odom);//在接收到里程计数据时调用,处理里程计数据 void odom_imuCB(const nav_msgs::Odometry& odom);
public: public:
ros::NodeHandle nh_; ros::NodeHandle nh_;
ros::Subscriber imu_sub_;//imu订阅者 ros::Subscriber imu_sub_;
ros::Subscriber odom_imu_sub_;//odom订阅者 ros::Subscriber odom_imu_sub_;
Imu_odom_pose_data imu_odom_;//用于存储IMU和里程计数据的结构体实例。 Imu_odom_pose_data imu_odom_;
Uwb_data uwb_data_;//用于存储UWB数据的结构体实例。 Uwb_data uwb_data_;
ros::Time imuDataRxTime, uwbDataRxTime, odomDataRxTime;//用于记录IMU、UWB和里程计数据接收时间的ROS时间对象。 ros::Time imuDataRxTime, uwbDataRxTime, odomDataRxTime;
Mat imu_odom_StartPos; Mat imu_odom_StartPos;
Mat imu_odomPos; Mat imu_odomPos;
Mat uwbPos; Mat uwbPos;
Mat syncPos;//同步位置通过卡尔曼滤波得到的最优位置估计结合IMU和UWB数据 Mat syncPos;
Mat Rotate; Mat Rotate;
Mat uwbStartPos; Mat uwbStartPos;
//自定义矩阵类 Mat 的实例,用于存储和计算位置、旋转等信息。 double qx, qy, qz, qw;
double qx, qy, qz, qw;//表示旋转 ros::Time odom_tmp_ ;
ros::Time odom_tmp_ ;//存储临时的里程计时间。
bool write_data_ = false; bool write_data_ = false;
cv::Mat img1; cv::Mat img1;
std::queue<std::pair<Imu_odom_pose_data,Uwb_data>> data_queue;//队列用于存储IMU和UWB数据对。 std::queue<std::pair<Imu_odom_pose_data,Uwb_data>> data_queue;
std::shared_ptr<uwb_slam::Uwb> uwb_;//指向 Uwb 类实例的智能指针用于处理UWB数据。 std::shared_ptr<uwb_slam::Uwb> uwb_;
std::shared_ptr<uwb_slam::Lighthouse> lighthouse_; std::shared_ptr<uwb_slam::Lighthouse> lighthouse_;
}; };
}; };

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@ -7,8 +7,8 @@ namespace uwb_slam{
struct Imu_data struct Imu_data
{ {
ros::Time imu_t_; ros::Time imu_t_;
double a_[3];//线性加速度 double a_[3];
double w_[3];//角速度 double w_[3];
Imu_data(){}; Imu_data(){};
Imu_data(double ax,double ay,double az, double wx, double wy, double wz) Imu_data(double ax,double ay,double az, double wx, double wy, double wz)
:a_{ax,ay,az},w_{wz,wy,wz}{}; :a_{ax,ay,az},w_{wz,wy,wz}{};
@ -19,10 +19,10 @@ struct Imu_data
struct Imu_odom_pose_data struct Imu_odom_pose_data
{ {
Imu_data imu_data_; Imu_data imu_data_;
double pose_[3];//位置 double pose_[3];
double quat_[4];//姿态四元数 double quat_[4];
double vxy_;//平面速度 double vxy_;
double angle_v_;//角速度 double angle_v_;
Imu_odom_pose_data(){}; Imu_odom_pose_data(){};
Imu_odom_pose_data( Imu_data imu_data,double x,double y,double z, double qw, double qx, double qy, double qz,double vxy, double angle_v):imu_data_(imu_data),pose_{x,y,z},quat_{qw,qx,qy,qz},vxy_(vxy),angle_v_(angle_v){}; Imu_odom_pose_data( Imu_data imu_data,double x,double y,double z, double qw, double qx, double qy, double qz,double vxy, double angle_v):imu_data_(imu_data),pose_{x,y,z},quat_{qw,qx,qy,qz},vxy_(vxy),angle_v_(angle_v){};
}; };
@ -45,7 +45,7 @@ struct Imu_odom_pose_data
struct Uwb_data struct Uwb_data
{ {
float x_,y_;//位置信息 float x_,y_;
ros::Time uwb_t_; ros::Time uwb_t_;
Uwb_data(){}; Uwb_data(){};
Uwb_data(float x,float y,float t):x_(x),y_(y),uwb_t_(t){}; Uwb_data(float x,float y,float t):x_(x),y_(y),uwb_t_(t){};
@ -53,8 +53,8 @@ struct Uwb_data
struct LightHouseData struct LightHouseData
{ {
float x_,y_,z_;//位置 float x_,y_,z_;
float qw_,qx_,qy_,qz_;//四元数 float qw_,qx_,qy_,qz_;
ros::Time lighthouse_t_; ros::Time lighthouse_t_;
LightHouseData(){}; LightHouseData(){};
LightHouseData(float x,float y,float z, float qw, float qx, float qy, float qz, float t): LightHouseData(float x,float y,float z, float qw, float qx, float qy, float qz, float t):

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@ -47,7 +47,7 @@ void Mat::Init(int setm,int setn,int kind)
{ {
memset(mat,0,MAT_MAX*MAT_MAX*sizeof(double)); memset(mat,0,MAT_MAX*MAT_MAX*sizeof(double));
} }
//单位矩阵
if(kind==1) if(kind==1)
{ {
int x; int x;
@ -116,7 +116,6 @@ Mat operator /(Mat a,double k)
{ {
return (1/k)*a; return (1/k)*a;
} }
//矩阵乘法
Mat operator *(Mat a,Mat b) Mat operator *(Mat a,Mat b)
{ {
Mat c(a.m,b.n,-1); Mat c(a.m,b.n,-1);
@ -182,7 +181,7 @@ Mat operator ~(Mat a)
} }
//求解AX = B
Mat operator /(Mat a,Mat b) Mat operator /(Mat a,Mat b)
{ {
//高斯消元法 //高斯消元法
@ -230,7 +229,7 @@ Mat operator /(Mat a,Mat b)
return a; return a;
} }
//求解XA = B
Mat operator %(Mat a,Mat b) Mat operator %(Mat a,Mat b)
{ {
//高斯消元法 //高斯消元法
@ -349,7 +348,7 @@ double Mat::absvec()
{ {
return sqrt(Sqrt()); return sqrt(Sqrt());
} }
//向量叉积
Mat operator ^(Mat a, Mat b) Mat operator ^(Mat a, Mat b)
{ {
double ax=a.mat[0][0]; double ax=a.mat[0][0];

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@ -26,16 +26,16 @@ namespace uwb_slam{
std::cout<<"file can not open"<<std::endl; std::cout<<"file can not open"<<std::endl;
} }
Mat prevPos(2, 1, 0);//之前的矩阵 Mat prevPos(2, 1, 0);
Mat deltaPos(2, 1, 0);//当前位置与之前位置的差值 Mat deltaPos(2, 1, 0);
Mat predPos(2, 1, 0);//预测的位置 Mat predPos(2, 1, 0);
Mat R(2, 2, 1);//测量噪声协方差矩阵 Mat R(2, 2, 1);
Mat Q(2, 2 ,1);//过程噪声协方差矩阵 Mat Q(2, 2 ,1);
Q = Q * 0.00001;// Q = Q * 0.00001;
Mat P(2, 2, 0);//估计误差协方差矩阵 Mat P(2, 2, 0);
Mat F(2, 2, 1);//状态转移矩阵 Mat F(2, 2, 1);
Mat Kg(2, 2, 0);//卡尔曼增益矩阵 Mat Kg(2, 2, 0);
Mat Z(2, 2, 0);//测量值矩阵 Mat Z(2, 2, 0);
uwbStartPos.mat[0][0]=9; uwbStartPos.mat[0][0]=9;
uwbStartPos.mat[1][0]=0; uwbStartPos.mat[1][0]=0;
@ -52,32 +52,27 @@ namespace uwb_slam{
// } else if (key3 == 'e') { // } else if (key3 == 'e') {
// printFlag = 0; // printFlag = 0;
// } // }
//检查IMU数据是否更新
if(imuDataRxTime!=imu_odom_.imu_data_.imu_t_){ if(imuDataRxTime!=imu_odom_.imu_data_.imu_t_){
// std::cout << "imu received" << std::endl; // std::cout << "imu received" << std::endl;
//更新IMU位置
imu_odomPos.mat[0][0] = imu_odom_.pose_[0] * 100; imu_odomPos.mat[0][0] = imu_odom_.pose_[0] * 100;
imu_odomPos.mat[1][0] = imu_odom_.pose_[1] * 100; imu_odomPos.mat[1][0] = imu_odom_.pose_[1] * 100;
qx = imu_odom_.quat_[0]; qx = imu_odom_.quat_[0];
qy = imu_odom_.quat_[1]; qy = imu_odom_.quat_[1];
qz = imu_odom_.quat_[2]; qz = imu_odom_.quat_[2];
qw = imu_odom_.quat_[3]; qw = imu_odom_.quat_[3];
yaw = -atan2(2*(qw*qz+qx*qy),1-2*(qy*qy+qz*qz));//机器人的航向角 yaw = -atan2(2*(qw*qz+qx*qy),1-2*(qy*qy+qz*qz));
//std::cout<<"yaw:"<<yaw<<std::endl; //std::cout<<"yaw:"<<yaw<<std::endl;
if (imuStartFlag == 1 && imu_odomPos.mat[0][0] != 0 && imu_odomPos.mat[1][0] != 0) { if (imuStartFlag == 1 && imu_odomPos.mat[0][0] != 0 && imu_odomPos.mat[1][0] != 0) {
imuStartyaw = yaw-PI/2; imuStartyaw = yaw-PI/2;
imu_odom_StartPos = imu_odomPos; imu_odom_StartPos = imu_odomPos;
imuStartFlag = 0; imuStartFlag = 0;
}//记录初始航向角和初始位置 }
//std::cout << imu_odom_StartPos.mat[0][0] << " " << imu_odom_StartPos.mat[1][0] << std::endl; //std::cout << imu_odom_StartPos.mat[0][0] << " " << imu_odom_StartPos.mat[1][0] << std::endl;
yaw = yaw - imuStartyaw; yaw = yaw - imuStartyaw;
imu_odomPos = imu_odomPos - imu_odom_StartPos; imu_odomPos = imu_odomPos - imu_odom_StartPos;
//调整yaw角以考虑初始偏移并更新相对于初始位置的相对位置
deltaPos = imu_odomPos - prevPos; deltaPos = imu_odomPos - prevPos;
prevPos = imu_odomPos; prevPos = imu_odomPos;
//计算位置变化更新prevPOS
//检查UWB数据是否更新
if (uwbDataRxTime != uwb_->uwb_data_.uwb_t_) { if (uwbDataRxTime != uwb_->uwb_data_.uwb_t_) {
// std::cout << "uwb received" << std::endl; // std::cout << "uwb received" << std::endl;
@ -88,17 +83,16 @@ namespace uwb_slam{
uwbPos.mat[0][0] = uwb_->uwb_data_.x_; uwbPos.mat[0][0] = uwb_->uwb_data_.x_;
uwbPos.mat[1][0] = uwb_->uwb_data_.y_; uwbPos.mat[1][0] = uwb_->uwb_data_.y_;
//更新uwb初始位置
// uwbPos = uwbPos - Rotate * uwbStartPos; // uwbPos = uwbPos - Rotate * uwbStartPos;
predPos = F * syncPos + deltaPos;//预测下一个位置 predPos = F * syncPos + deltaPos;
Z = H * uwbPos; Z = H * uwbPos;
P = F * P * (~F) + Q; P = F * P * (~F) + Q;
Kg = P * (~H) / (H * P * (~H) + R); Kg = P * (~H) / (H * P * (~H) + R);
syncPos = predPos + Kg * (Z - H * predPos); syncPos = predPos + Kg * (Z - H * predPos);
P = (I - Kg * H) * P; P = (I - Kg * H) * P;
uwbDataRxTime = uwb_->uwb_data_.uwb_t_; uwbDataRxTime = uwb_->uwb_data_.uwb_t_;
//如果uwb更新使用卡尔曼滤波算法进行状态预测和更新
} else { } else {
syncPos = syncPos + deltaPos; syncPos = syncPos + deltaPos;
} }

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@ -16,7 +16,7 @@ namespace uwb_slam{
std::cout << "Creating UDP socket sucess. " << std::endl; std::cout << "Creating UDP socket sucess. " << std::endl;
// 设置套接字地址结构 // 设置套接字地址结构
sockaddr_in udpAddress;//存储UDP套接字的地址信息 sockaddr_in udpAddress;
std::memset(&udpAddress, 0, sizeof(udpAddress)); std::memset(&udpAddress, 0, sizeof(udpAddress));
udpAddress.sin_family = AF_INET; udpAddress.sin_family = AF_INET;
udpAddress.sin_addr.s_addr = htonl(INADDR_ANY); udpAddress.sin_addr.s_addr = htonl(INADDR_ANY);
@ -42,7 +42,7 @@ namespace uwb_slam{
void Lighthouse::UDPRead(){ void Lighthouse::UDPRead(){
char buffer[1024]; char buffer[1024];
ssize_t bytesRead = recvfrom(UdpSocket, buffer, sizeof(buffer), 0, nullptr, nullptr);//系统调用函数从指定UDP接收数据 ssize_t bytesRead = recvfrom(UdpSocket, buffer, sizeof(buffer), 0, nullptr, nullptr);
if (bytesRead == -1) { if (bytesRead == -1) {
std::cerr << "Error receiving data." << std::endl; std::cerr << "Error receiving data." << std::endl;
return; return;

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@ -21,10 +21,9 @@ namespace uwb_slam{
std::cout<<std::endl; std::cout<<std::endl;
} }
A.Init(2,2,0);//线性方程组中的系数矩阵 A.Init(2,2,0);
b.Init(2,1,0); b.Init(2,1,0);
uwbPos.Init(2,1,0); uwbPos.Init(2,1,0);
//根据UWB定位算法中目标点的距离差方程
for(int i=0; i<2; i++) for(int i=0; i<2; i++)
{ {
A.mat[i][0] = -2*(this->AnchorPos[0][0]-this->AnchorPos[i+1][0]); A.mat[i][0] = -2*(this->AnchorPos[0][0]-this->AnchorPos[i+1][0]);
@ -88,7 +87,7 @@ namespace uwb_slam{
} }
for(int i=0; i<3; i++) for(int i=0; i<3; i++)
{ {
this->d[i] = sqrt(this->d[i] * this->d[i] - (AnchorPos[i][2] - CARHEIGHT) * (AnchorPos[i][2] - CARHEIGHT));//对距离进行校正,去除高度差影响,即目标点到锚点的水平距离 this->d[i] = sqrt(this->d[i] * this->d[i] - (AnchorPos[i][2] - CARHEIGHT) * (AnchorPos[i][2] - CARHEIGHT));
} }
d[0] = ((((4.9083e-07 * d[0]) - 4.6166e-04) * d[0]) + 1.0789) * d[0] + 5.4539; d[0] = ((((4.9083e-07 * d[0]) - 4.6166e-04) * d[0]) + 1.0789) * d[0] + 5.4539;
d[1] = ((((-4.1679e-07 * d[1]) + 5.0999e-04) * d[1]) + 0.7930) * d[1] + 29.8296; d[1] = ((((-4.1679e-07 * d[1]) + 5.0999e-04) * d[1]) + 0.7930) * d[1] + 29.8296;

0
Code/MowingRobot/pibot_ros/runBringUp.sh Executable file → Normal file
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0
Code/MowingRobot/pibot_ros/runCarLocation.sh Executable file → Normal file
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Code/MowingRobot/pibot_ros/runRoomExplorationClient.sh Executable file → Normal file
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Code/MowingRobot/pibot_ros/runRoomExplorationServer.sh Executable file → Normal file
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@ -1,4 +0,0 @@
# make sure that .gitignore, .travis.yml,... are not part of a
# source-package generated via 'git archive'
.git* export-ignore
/.* export-ignore

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@ -1,2 +0,0 @@
# Build directory (recommended location)
build/

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@ -1,16 +0,0 @@
sudo: false
language: cpp
compiler:
- gcc
- clang
addons:
apt:
packages:
- libusb-1.0-0-dev
- libjpeg-dev
before_script:
- mkdir build
- cd build
- cmake ..
script:
- make

0
Code/MowingRobot/pibot_ros/third_party/libuvc/src/ctrl-gen.py vendored Executable file → Normal file
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@ -1 +0,0 @@
/usr/local/lib/libopencv_highgui.so

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@ -0,0 +1 @@
/usr/local/lib/libopencv_highgui.so

0
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