Multiprocessor real-time simulation platform

Abstract

The present invention relates to a multi-processor satellite real-time simulation platform which consists of three or more than three ARM processors, and two or more than two DSP processors with an FPGA as an intermediate memory. The ARM1 is used as the computer of the simulation satellite control center; the ARM2 is used in the space environment of the simulation satellite; the ARM3 is used for the kinetic calculation of the satellite; the DSP1 is used for completing the calculation of a sensor model; the DSP2 is used for completing the calculation of an actuating mechanism; the ARM1 sends data to the DSP1 so as to acquire instructions; the DSP1 sends the acquired data instructions to the ARM2 and the ARM3, fetches relevant data from the FPGA, and transmits the data to the ARM1; the ARM1 completes the calculation according to the read data, and acquires the corresponding attitude orbital parameters; if the parameters satisfy the requirements, the satellite enters the normal mode; if the parameters do not satisfy the requirements, the ARM1 sends control instructions to the DSP2 so as to control the actuating mechanism; the DSP2 transmits the corresponding data to the ARM2 and the ARM3 through the FPGA after completing the calculation, until the attitude orbit can satisfy the corresponding requirements. The platform simplifies the complexity of the system, lowers the difficulty of the simulation, and improves the real-time performance of the simulation.

Description

technical field [0001] The invention is a simulation platform for satellite dynamics, in particular a multi-processor real-time simulation platform. Background technique [0002] Satellite dynamic simulation technology is a method used for scientific research as an experiment. Satellite simulation is divided into three types: mathematical simulation, semi-physical simulation, and full-physical simulation, among which the simulation of satellite control system is particularly important. Mathematical simulation is to test the mathematical model of the system on the computer. The mathematical simulation of the satellite control system is usually combined with the computer-aided analysis of the control system to complete the time domain simulation of satellite orbit dynamics and satellite attitude dynamics and the frequency domain analysis of the control system. [0003] The satellite mathematical simulation mainly includes the following contents: (1) The space environment mode...

AI Technical Summary

Problems solved by technology

Due to some uncertain factors and insufficient real-time performance of the system itself, the entire simulation will be uncertain. If the VxWorks real-time operating system is used, the same simulation cost will increase

Sometimes in order to simulate the corresponding space environment, dozens of computers have to be used to work for more than ten days at the same time, which causes a waste of resources on the one hand, and takes too much time on the other; at the same time, PCs are used to realize satellite system simulation, most of which are based on PCI In this way, the bandwidth and transmission rate of the PCI bus are the bottleneck of the entire control system in data transmission. Therefore, on this basis, a multi-processor real-time simulation platform is proposed, which is very necessary for satellite dynamic simulation, and is the future A trend of satellite development is necessary. The embedded system integrating various advantages of ARM technology, DSP technology and FPGA technology at the same time is the only technical way to break through the bottleneck of PC simulation in satellite dynamic simulation. It can not only greatly improve satellite performance. Simulation accuracy, and also provide reliable basis and support for future satellite processor selection

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