'Simulated flight' simulation method used for detecting rocket control system

Abstract

The invention discloses a 'simulated flight' simulation method used for detecting a rocket control system, comprising the following steps: firstly, resolving a dynamic and dynamitic model of six freedom degrees of a rocket body by using a control system and generating a flight control instruction; secondly, converting the flight control instruction into a driving signal by virtue of the control system, wherein the driving signal is used for driving a servo actuator, and the servo actuator and a modality excitation set jointly act, so that the rocket body shakes; and thirdly, passing back characteristic information of the rocket body into the step one, and forming a data closed loop. The simulation method disclosed by the invention can simulate an elastic shaking characteristic difficult inaccurate modeling by introducing a real rocket body, influence of the characteristic on flight quality is further tested, and success rate of a flight test is improved; and a real flight test productis adopted for simulation, development and production work of a simulated product is eliminated, and inconsistency of the simulated product with a flight product is avoided.

Description

technical field [0001] The invention relates to the field of design and test of a rocket control system, in particular to a "simulated flight" simulation method for testing a rocket control system. Background technique [0002] The simulation test is used to test the reliability and matching of the software and hardware of the control system. The two most important indicators of the simulation test are "similarity" and "real-time performance". "Similarity" requires that the simulation test object, data-driven process, core mathematical model and real operating mechanism maintain a high degree of fidelity; "real-time" refers to maintaining the consistency of time and space, and advancing according to the objective occurrence process under the real natural time scale Simulation, strict real-time simulation has higher reality than sub-real-time and super-real-time; [0003] In the traditional development process of launch vehicles, simulation tests mainly include two types: ma...

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Problems solved by technology

[0007] In order to solve the above problems, the present invention provides a "simulated flight" simulation method for detecting the rocket control system; by closing the elastic sway characteristics of the rocket body into the simulation test process, the actual data of the rocket elastic sway is mainly , to avoid the problem of inaccurate modeling; and use the comparative analysis method to verify the mathematical model of theoretical calculation; it can realize the consistency between the simulation test and the real flight of each stand-alone product; reduce the cost of the simulation test equipment and improve the simulation test. Equipment reusability

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