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Dynamic analysis method for spacecraft propulsion system based on Modelica model

A propulsion system and analysis method technology, applied in the field of dynamic analysis of spacecraft propulsion system based on Modelica model, can solve modularization, insufficient parameterization, complex and difficult modeling process, low model reusability, versatility and scalability, etc. problem, to reduce the workload of modeling, reduce the difficulty and complexity of construction, and improve the effect of reusability

Inactive Publication Date: 2017-11-17
苏州同元软控信息技术有限公司
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Problems solved by technology

For a large complex coupling system like a propulsion system, this method leads to complex and difficult modeling process, and the developed model has low reusability, versatility and scalability, and is insufficient in terms of modularization and parameterization

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  • Dynamic analysis method for spacecraft propulsion system based on Modelica model
  • Dynamic analysis method for spacecraft propulsion system based on Modelica model
  • Dynamic analysis method for spacecraft propulsion system based on Modelica model

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Embodiment Construction

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] A method for dynamic analysis of spacecraft propulsion system based on Modelica mainly includes the following implementation steps to realize the construction of non-causal propulsion system model library.

[0038]1) Determining the model target: According to the task of dynamic analysis of the spacecraft propulsion system, to determine the target and extended use of the spacecraft propulsion system model, it is necessary to clarify the information that can be obtained through the model and the information that the model does not need to consider.

[0039] 2) Construct a conceptual model: The conceptual model is a schematic block diagram of the propulsion system, which assists in analyzing the principles and mechanisms of the main phenomena of the spacecraft propulsion system, helps engineers fully understand the physical syste...

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Abstract

The invention discloses a dynamic analysis method for a spacecraft propulsion system based on a Modelica model. The method comprises the following steps: 1) determining a model target; 2) constructing a concept model; 3) decomposing a system; 4) building a basic model; 5) designing a connector; 6) establishing an assembly model; 7) building a medium model; 8) building a system model; 9) making simulated analysis. The dynamic analysis method combines a modeling simulation theory of the spacecraft propulsion system with a system Modellica technology and employs a statement method directed at objects to build a dynamic model of the propulsion system. Due to non-causal characteristics, modeling engineers do not need to decouple the propulsion system without assigning input and output variants of the model and the equation solving sequence. During solving, a simulation system can determine the equation solving sequence according to the environment of equation system data flows. Therefore, modeling difficulty and complexity of a dynamic model of the propulsion system are effectively reduced. The reusability and expansibility of the model are improved.

Description

technical field [0001] The invention relates to a dynamic analysis method for a spacecraft propulsion system, in particular to a dynamic analysis method for a spacecraft propulsion system based on a Modelica model. Background technique [0002] Modelica is an open new multi-domain unified modeling language proposed by the international simulation community in 1997. Object-oriented technology and Matlab's numerical and matrix mechanism, so it has extremely powerful modeling functions. Object-oriented and non-causal are the biggest advantages of Modelica language. The object-oriented modeling method has the characteristics of data encapsulation, layering, connection and inheritance, etc. It is easy to reduce the occurrence of errors and realize the reuse of models. The so-called non-causal modeling is to express the model equation in a neutral and natural form, so that there is no need to consider the calculation sequence more, avoiding the tedious derivation of the model ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20Y02T90/00
Inventor 黄磊谢刚杨阳丁吉王为巩朝阳
Owner 苏州同元软控信息技术有限公司
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