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The "chassis" of the lunar rover, an important prop in the popular sci-fi movie "The Wandering Earth 2", is the six-degree-of-freedom simulation platform, which is manufactured by our company and used in film and television shooting flight simulators.

The six-degree-of-freedom simulation platform, also known as the six-degree-of-freedom Stewart parallel robot, and the Delta robot, which is widely used in industrial automation production in the fields of food, medicine, and electronics, are called two classic configurations of parallel robots. It is composed of computer control system, motor drive system, etc. The bottom platform is fixed on the ground, the top platform is used to support the load, and the middle is connected by an electric cylinder, which can realize six dimensions of the platform, including front and rear, left and right, up and down, front and rear pitching, and left and right rolling. sports. Therefore, Stewart robots are often used in the simulation of scene motions such as earthquakes, ships, and airplanes.

In November 2021, the crew of "The Wandering Earth 2" contacted Quankong Technology and asked if it could produce a six-degree-of-freedom simulation platform with a load of 30 tons within two months, which was unprecedented in China at the time. According to the staff, in order to create a real scene and bring the audience an immersive viewing experience, the crew plans to build a 9-meter-long and 4-meter-wide lunar rover cockpit on a six-degree-of-freedom simulation platform, all made of steel and glass. The total weight is about 30 tons, which is equivalent to three 10-ton trucks fully loaded with goods.

The heavier the load of the 6DOF simulation platform, the greater the test for the safety, reliability and stability of the platform, which involves a large number of algorithms and hardware support. "Compared with a 20-ton platform, the manufacturing difficulty of a 30-ton platform increases exponentially. The platform must not only carry 30 tons of weight, but also be able to quickly, safely and accurately respond to the movement instructions of front and back, left, right, up and down. Once a problem occurs in a certain link , the platform may go out of control or even collapse.”

In the face of new challenges, we spent a month building a static and dynamic model to analyze the change of the central stress point of the platform under the load of 30 tons, and to find feasible theoretical support. After completing the verification, the company came to the shooting site of "The Wandering Earth 2" in Qingdao, China, for on-site construction. On February 15, 2022, the lens of the lunar rover was turned on for trial shooting. After 7 hours of smooth shooting, the platform passed the acceptance at one time.

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