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Detailed explanation and practice of comprehensive absolute positioning movement instructions

Jan 23, 2024 am 08:12 AM
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Detailed explanation and practice of comprehensive absolute positioning movement instructions

Comprehensive analysis and example drills of absolute positioning motion instructions

Absolute positioning motion is a very common function for controlling robots in the field of industrial automation. By specifying the specific position of the robot in the work space, precise fixed-point movement is achieved to complete various complex operating tasks. This article will comprehensively analyze the principles and implementation methods of absolute positioning motion, and provide detailed code examples for readers to practice and learn.

The principle of absolute positioning movement
In industrial robots, absolute positioning movement refers to controlling the end effector of the robot to move to a predefined target position. This target position can be preset in the robot controller's program, or it can be specified in real time through an external input device. The robot obtains the current position information of the end effector through sensors and encoders, then calculates the movement path to the target position, and controls each joint of the robot to move according to the predetermined path.

Method to achieve absolute positioning movement
In the robot control system, the following steps are mainly used to achieve absolute positioning movement:

  1. Set the target position: Set the target position in the control system Determine the target position of the robot's end effector. This target position is usually provided by an external input device (such as a teaching box or programming interface), or can be set directly in the controller.
  2. Get the current position: The robot obtains the current position information of the end effector through devices such as sensors and encoders. This information is usually expressed in the form of coordinates, such as Cartesian coordinates or joint coordinates.
  3. Calculate the motion path: Calculate the motion path through the inverse kinematics algorithm based on the target position and the current position. The inverse kinematics algorithm calculates the angle or position that each joint should move based on the robot's joint motion range and constraints, as well as the target position of the end effector. This calculation process is relatively complex and usually requires the help of mathematical models and computer algorithms.
  4. Control joint movement: Based on the calculated joint position or angle, control the joints of the robot to move along a predetermined path. This process is usually implemented by the controller sending instructions to the robot's drive and servo controller.

Code example of absolute positioning movement
The following is a simple code example that demonstrates how to implement a robot program based on absolute positioning movement through C language:

#include <iostream>
#include <robot_api.h>

int main() {
    // 创建机器人控制对象
    RobotController robot;

    // 设置目标位置
    double target_x = 100.0;
    double target_y = 50.0;
    double target_z = 200.0;

    // 获取当前位置
    double current_x = robot.getCurrentPositionX();
    double current_y = robot.getCurrentPositionY();
    double current_z = robot.getCurrentPositionZ();

    // 计算运动路径
    double distance = sqrt(pow(target_x - current_x, 2) + pow(target_y - current_y, 2) + pow(target_z - current_z, 2));
    double velocity = 10.0;  // 设置移动速度
    double time = distance / velocity;

    // 控制关节运动
    robot.moveAbsolute(target_x, target_y, target_z, time);

    return 0;
}

In In this example, we first create a robot control object and then set the target position (target_x, target_y, target_z). Next, obtain the current position by calling the getCurrentPositionX(), getCurrentPositionY(), and getCurrentPositionZ() functions of the robot control object. Then, by calculating the distance and moving speed between the two points, the time it takes for the robot to move is calculated. Finally, the absolute positioning movement of the robot is realized by calling the moveAbsolute() function of the robot control object.

Summary
Absolute positioning movement plays an important role in the field of industrial automation and can realize precise point-determining movement of robots. This article comprehensively analyzes the principles and implementation methods of absolute positioning motion, and provides a C language code example for readers to practice and learn. I hope this article can help readers apply absolute positioning motion technology in the field of industrial automation.

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