Stage separation test device and method for balancing gravity

Abstract

The invention provides a stage separation test device and method for balancing gravity. The stage separation test device comprises a lifting beam 1, lifting points 21 and 22, rotation shafts 31 and 32 and lifting tools 41 and 42. The lifting points 21 and 22 are arranged on the lifting beam 1, the distance between both sides of the lifting points 21 and 22 is equal to the distance between both sides of the rotation shafts 31 and 32, the upper ends of the lifting tools 41 and 42 are connected with the lifting points 21 and 22 and vertical to the lifting beam 1, and the lower ends of the lifting tools 41 and 42 are connected with the rotation shafts 31 and 32. The stage separation test method which is realized by adopting the test device comprises the following steps of: overlapping the lifting beam 1 so that the height L of the lifting beam 1 is equal to d / sin2theta and the bearing capacity of the lifting beam 1 meets separation static and dynamic load requirements on separation bodies51 and 52; respectively connecting one ends of the lifting tools 41 and 42 with the lifting points 21 and 22, and extending the other ends of the lifting tools 41 and 42 to the ground; and respectively connecting the other ends of the lifting tools 41 and 42 with the rotation shafts 31 and 32 and adjusting connection points of the lifting tools 41 and 42 with the rotation shafts 31 and 32 so thatthe separation bodies 51 and 52 keep balance under the action of the gravity without rotating around the rotation shafts 31 and 32.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a gravity-balanced inter-stage separation test device and test method. Background technique [0002] During the flight of some aerospace vehicles, in order to reduce the negative load, the separation between the stages is an indispensable step in the flight process. Whether the separation can be completed normally is directly related to the success or failure of the launch of the aircraft. There are two main separation methods currently used, one is cold separation and the other is hot separation. No matter which separation method is selected, when designing the separation system, the separation speed and separation attitude of the separation body are the main design parameters to assess whether the separation system design can meet the requirements. In order to obtain the design parameters of the separation system, methods such as theoretical calculation, flight simulation...

AI Technical Summary

Problems solved by technology

This test method needs to manufacture a small model bomb, and each actuator needs to be scaled proportionally, the test cost is high, and it is not suitable for the initial stage of development

In terms of ground test measurement methods, it is mentioned in the "NWPU Mechanics Experiment Instruction Manual" (http: / / jpkc.nwpu.edu.dn / jp2005 / 04 / XNSY1.htm) that the separation between stages is carried out in the pressure chamber through air flotation. The method of adding pressure to the block to make the separation body float is used for inter-stage separation. Although this method can more realistically simulate the inter-stage separation, the test equipment is complicated, and different pressure chambers and floating blocks need to be designed for different separation bodies. The versatility is not strong, and the test cost is high

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