A digital test method for rocket engine cold swing
A rocket engine and test method technology, which is applied in the field of rocket engine cold swing digital test, can solve the problems of lack of understanding and evaluation, lack of knowledge, etc., and achieve the effect of avoiding heterogeneous model conversion, reasonable steps, and comprehensive projects
Active Publication Date: 2017-12-22
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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Problems solved by technology
[0003] At present, the cold swing test of the existing technology is mainly based on the ground test of the finished product, and there is no necessary means to carry out the test in the early stage of engine design to check whether the pipeline, nozzle, main structure, etc. interfere during the engine cold swing process, so as to correct the design early Program
At the same time, the existing technology lacks effective investigation and evaluation of limit states that cannot be simulated by ground tests
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[0022] The present invention includes following technical solutions:
[0023] A digital test method for the cold swing of a rocket engine, including a digital test method for five swing modes of the rocket engine: circular pendulum, pitch, roll, yaw, and rectangle, and simulates three design states of normal state, limit state, and bottom-out state (For example, using the ProE / Mechanism module) to realize the identification of dynamic interference problems and the extraction of dangerous distances during the rocket engine swing process.
[0024] Rocket engine cold swing digital test method of the present invention is as follows:
[0025] (1) Use the kinematic mechanism assembly module of the CAD design software to correctly install the rocket engine and the servo mechanism (for example, use the Pro / E kinematic mechanism assembly module).
[0026] Taking a single engine driven and controlled by two servo mechanisms A and B as an example, the assembly process between the two is...
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The invention provides a rocket engine cold swing digital test method, comprising: S1, setting simulation environment initialization parameters; S2, constructing a motion mechanism model including a real motion mechanism and state based on a three-dimensional model of the engine, and controlling the rocket engine and the servo mechanism in the software Carry out installation; S3, define the motion equation of the motion mechanism of the rocket engine; S4, start running the digital test of the cold swing according to the motion equation of the engine motion mechanism, and perform dynamic interference check. The whole method of the invention has complete technology, reasonable steps, standardized operation and comprehensive items, verifies the rationality of relevant structural design schemes in the early stage of design, and fully embodies the predictive effect of simulation on physical tests.
Description
technical field [0001] The invention relates to the field of rocket engine tests, in particular to a digital test method for rocket engine cold swing. Background technique [0002] The complex structure of aerospace rocket engines requires a large number of ground tests, among which the engine cold swing test is an important part of structural coordination and must be resolved as early as possible in the development cycle. [0003] At present, the cold swing test of the existing technology is mainly based on the ground test of the finished product, and there is no necessary means to conduct the test in the early stage of engine design to check whether the pipeline, nozzle, main structure, etc. interfere during the engine cold swing process, so as to correct the design early plan. At the same time, the existing technology lacks effective investigation and evaluation of limit states that cannot be simulated by ground tests. Contents of the invention [0004] The technical ...
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IPC IPC(8): G01M15/14
Inventor 李莉王哲聂蓉梅皮赞刘敏李澍郭逸婧赵博
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG