Manipulator is a kind of production equipment that can be used to working under various conditions. It is mainly a multi-functional machine that simulates the operation of human hands to produce and process, and people can complete different operations by changing its control program.

Truss manipulator has been paid attention to because of its good effect on industrial production. Because it can replace workers to complete the specified production process together to ensure the production and processing quality in some occasions with poor environmental conditions, it has greatly improved the industrial production efficiency, and has been paid more and more attention by countries, such as "China's production 2025 strategy". Especially in some occasions with radioactivity and strong pollution, more financial and material resources will be invested in the research.

Manipulators can generally be divided into three categories according to the scope of application. Class I independent manipulator, Class II manual manipulator and Class III special manipulator. An independent manipulator can also be called a universal manipulator. An independent manipulator is literally an independent manipulator that does not need manual operation, and it is not attached to the host computer. It also has the function of memory intelligence along with the traditional function of a general manipulator. Manual manipulator is called manipulator for short. It was developed from atomic and military industry, and later developed into the communication profession. During the exploration of the planet, the manipulator is controlled by communication equipment to detect the planet. A professional manipulator is a manipulator specially used for blanking and transmission of factory machine tools. It is generally attached to the automatic production line or production machine tools. Except for a few processes, its operating processes are driven by the main machine and are fixed to serve the main machine.

If press drive method can be divided into hydraulic type, pneumatic type, electric type, mechanical manipulator; It can also be divided into point control and continuous track control manipulator according to the motion track control method.