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Analysis of Key Technical Difficulties and Challenge Points of Domestic Heavy-duty AGV
2023-03-29 16:09
Heavy-duty AGVs are mainly used in the production or handling of heavy equipment (cargo), such as construction machinery, automobiles and parts, steel manufacturing, aircraft manufacturing and other industries. In recent years, the demand for heavy-duty AGV in various industries has been increasing, and with the increase of load, the structural design difficulty of heavy-duty AGV increases.
1. Drive technology
Heavy-duty AGV requires AGV drive wheels to have sufficient pressure bearing capacity and drive capacity, and requires multiple drive wheels to work together. The coordinated control between these driving wheels directly determines the overall efficiency of the AGV, and also determines the stability and reliability of the AGV. In addition, it is also necessary to consider that uneven ground may cause some driving wheels to not be in good contact with the ground and cause suspension. It is necessary to design a suitable "suspension" structure according to the actual application to ensure that each driving wheel can make good contact with the ground to provide sufficient driving force.
2.AGV navigation technology
Navigation technology is the key to distinguish AGV from manual driving vehicles. For heavy duty AGV, the reliability of navigation control is particularly important. If the AGV navigation fails, it is very dangerous for the AGV carrying heavy cargo to deviate from the operating track. Therefore, in the heavy-duty AGV navigation technology, it is necessary to adopt a double closed-loop or even multi-closed-loop control method to ensure that the AGV navigation technology is stable and reliable.
3. Outdoor protection technology
In the current application, there are more and more outdoor use scenarios, and it is necessary to consider the impact of rain, snow and sand on the AGV body. In the design of AGV, we should focus on environmental factors such as the reliability of AGV outdoor navigation and the safety of AGV outdoor charging.
4. Non-standard design capability
In the design process of heavy-duty AGV, it is necessary to consider the actual needs of the user site, such as the center of gravity of the workpiece, the size requirements of AGV, the transfer and docking form of goods and other factors. These all determine the success or failure of the project, so the mechanical structure design ability of AGV manufacturers is very high.
5. Technical challenges
Although domestic heavy-duty AGV enterprises have been emerging in the past five years, jointly promoting the rapid development of technology in the whole industry, domestic enterprises are still facing the technical blockade of foreign enterprises to a certain extent. Foreign traditional heavy-duty AGV manufacturers started earlier, in the mechanical and electrical aspects, with independent research and development of patented units to provide overall technical support. In particular, the core controller, through the EtherCAT bus type control, real-time control of multiple drive units, control cycle is very short.
In contrast, the current domestic heavy-duty AGV technology basically uses autonomous controller or Siemens PLC as the main controller, through the CAN bus to control the multi-servo system, the control cycle is longer than foreign technology, and high-performance chips and core controllers are basically subject to foreign technology. We should face this gap directly, which is also the direction of the whole industry. We need to constantly innovate, walk out of a technical route of our own, increase investment in R & D of high-performance controllers, narrow the gap in core technologies, and hold the initiative in our own hands.
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