Device and method for simulating low gravity

Abstract

The invention discloses a device and method for simulating low gravity. The device for simulating low gravity mainly comprises multiple constant-tension control systems and a movable and rotary three-degree-of-freedom comprehensive platform, a control subsystem, a main hanging structure and a multi-hanging-point combined control system, wherein the constant-tension control systems are used for controlling the tension of hanging ropes within the range of the vertical operating stroke according to a command, the multiple constant-tension control systems are connected to the lower portion of the movable and rotary three-degree-of-freedom comprehensive platform and are connected with a simulated low-gravity object through the hanging ropes, the posture parameter of the multiple constant-tension control systems serve as the control information of the movable and rotary three-degree-of-freedom comprehensive platform after being coupled, the main hanging structure is arranged on a servo comprehensive platform, and the multi-hanging-point combined control system calculates the current hanging force values of all hanging points and guarantees that the hanging force meets the set gravity requirement according to the position posture of the simulated low-gravity object, and the hanging force passes through the center of mass of the simulated low-gravity object. According to the low-gravity simulating device, the stress condition of all movable parts of moving mechanisms and the stress condition of the positions where the movable parts are connected can be represented truly so that the device can be adapted to the real-time change of the center of mass.

Description

technical field [0001] The invention relates to a low gravity simulation device and method. Background technique [0002] At present, there are various devices for simulating low-gravity environments, such as devices with landing boxes, aircraft, waters, balloons, and lifting machinery, which apply vertical load-reducing forces to the center of gravity of the test object. Simulators are based on various fixed or geographically mobile systems, the most typical of which are overhead cranes and transport machinery. Existing low-gravity simulators are generally simulators with a certain trajectory along a single direction. A single-point automatic tracking system has been developed for use in special fields, but it cannot meet the low-gravity real-time simulation requirements for each component of multi-component mechanism products. [0003] Low-gravity simulation is required during the ground test of the lunar rover. Usually, the walking system of the lunar rover is a multi-co...

AI Technical Summary

Problems solved by technology

During the test, only the load reduction control of the lunar rover box (single point) was carried out. Due to the complexity of the simulated lunar surface terrain and the disordered change of the center of mass of the moving parts, it was impossible to accurately simulate the wheel pressure of the six wheels during the lunar surface walking process of the lunar rover. , unable to adjust in real time following changes in the internal center of mass of the mechanism components

That is, it is impossible to obtain accurate performance parameters of the lunar rover on the lunar surface

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