Product Introduction:
The anti-sway positioning system utilizes a spreader swing model. Based on data exchange and joint control between a PLC and a frequency converter using Industrial Ethernet, an anti-sway algorithm is developed. An anti-sway operation program is compiled based on this algorithm. The anti-sway control algorithm within the anti-sway function block generates a speed reference curve for the trolley and carriage transmissions and transmits it to the frequency converter. The frequency converter receives the speed reference curve from the anti-sway control unit and controls the motor speed accordingly. After two or more speed reference curves are set, stable operation of the spreader actuator is ensured.
Application Scenarios:
Unmanned systems for coil storage, grab cranes, electromagnetic chuck cranes, and vortex wells.
Technical Parameters:
1.Anti-sway accuracy: ±0.4°
2.Driving target position deviation: ±25mm
3.Communication method: PROFINET / PROFIBUS / RS232 / RS422 / RS485;
4.Eliminate load sway by more than 96%;
5.Advanced technology, practical and reliable, and significant control effect;
6.Can significantly and quickly reduce the sway of the crane load;
7.Eliminate the time waiting for the load to stop swaying, improve the safe operation speed, and improve the use efficiency of the crane.
Features:
1.The anti-sway system fully controls load sway caused by the acceleration and deceleration of the trolley and carriage during crane operation.
2.The anti-sway system's basic principle is to prevent load sway by adjusting the travel speed of the trolley and carriage in real time. The anti-sway system detects the current load rope length and calculates the corresponding speed in real time. This speed is transmitted to the PLC, which then adjusts the set speed of the trolley and carriage to achieve the anti-sway effect.
3.An electronic anti-sway control algorithm utilizes an internal mathematical model to calculate and control the acceleration and deceleration of the trolley and carriage to prevent grab bucket sway.
Angle Detection Methods:
1.Closed-loop detection using infrared markers and angle sensors. This method accurately measures the current load swing angle, correcting for both swing caused by crane movement and external forces.
2.Open-loop detection without infrared markers or angle sensors. This method utilizes the anti-sway controller's internal anti-sway mathematical model, reading the Gray bus and relevant data from the inverter to calculate the current swing angle and then implement anti-sway control. This method achieves excellent anti-sway performance even when the crane is not subject to external forces, making it suitable for indoor cranes.
