With the rapid development of industrial manufacturing technology, the automation and intelligence level of production factories in various industries is increasing. Various industrial robots such as robotic arms, collaborative robots, mobile robots, and composite robots are gradually becoming standard equipment for smart factories. Robotic arms replace manual labor in most production automation processes, greatly improving production efficiency and productivity, while composite robots achieve automatic logistics docking and circulation in various links, truly realizing unmanned production.

Since the outbreak of the epidemic, the application of composite robots has been increasingly valued. On the front line of epidemic prevention and control, robots have taken on auxiliary medical care, food delivery, temperature measurement and disinfection, etc., improving efficiency and reducing the possibility of cross infection. In the recent resumption of work and production, enterprises with high levels of automation and intelligence have been less affected by the "labor shortage". The value of industrial robots in industrial manufacturing, logistics and distribution, catering and retail, security patrol, rehabilitation and medical fields has been further highlighted. It can be said that industrial robots will play an increasingly important role in the future transformation of old and new kinetic energy in China.

For traditional industrial robot arms, due to the fixed position of the body, the operating range is limited, and due to the size of the arm span, the motion radius is restricted. Many companies have begun to try to match and assemble robotic arms with mobile robots to create "composite robots" that can handle more work processes and can handle more tasks, with the intention of freeing up the workspace of robotic arms and allowing them to reach places that were previously inaccessible, in order to meet the requirements of flexible production in workshop automation equipment.

Composite robot is a new type of robot that has both hand and foot functions. In the past world of robotics, typical industrial robots were called robotic arms. Intelligent mobile robots are used to replace the functions of human legs and feet to move and control direction. The composite robot combines the advantages of both, using both hands and feet together to combine the two functions.

However, traditional industrial robot arms are not suitable as the "hand" of composite robots due to their bulky body, heavy load on autonomous mobile robots, excessive leg rigidity, and low safety. Therefore, we have considered using collaborative robots to replace industrial robot arms as this "hand".

Compared to traditional industrial robots, composite robots have much smaller loads, but they are inexpensive and easy to use. More importantly, they have strong adaptability, flexibility, and high security. Compared with industrial robots that have been developed for decades, composite robots can directly cooperate with production site workers, ensuring safety, improving automation and work efficiency. At present, many well-known composite robot brands from both domestic and foreign countries have emerged.