2015 , Volume 20, № 3, p.33-45

We address a method for modelling of onboard equipment for the command and the measuring system of the spacecraft. The result of the method is the information and graphical simulation model that represents the specified level of details for the configuration and functions of the onboard equipment. A heuristic approach is used to support the model construction that allows a sequence of model changes in order to simulate the required specifications and functions of the equipment. The model is designed to simulate the operation of a command-measuring system. The command-measuring system is designed for command-measuring control of onboard systems, transmission of telemetric information to Earth control complex, measurement of current navigation parameters of a spacecraft’s orbit. We have formally described the model of a command-measuring system, and also designed the methods and instruments allowing to present its architecture and a configuration of connections. The model’s function rules are explicitly set in the knowledge base of the product. The rules describe the logics for operation of the command-measuring system: transfer of command information to spacecraft’s systems, acceptance and transmission of telemetric information, conditions of the onboard equipment control, choice of interfaces for the equipment. The research is carried out for creation of the “Program-mathematical model of the onboard equipment command and measurement system”. The program includes the tools for model building and simulation. During the simulation it renders the sequence of actions defined for a specific model configuration. The software includes advanced configuration features models, statistical modelling of storage, management simulations, and analyze the results of the model. These functions allow a user to enter a variety of heuristics to analyze design solutions. The program was put into trial operation in the JSC "Academician MF Reshetnev Information Satellite Systems" .