Aerospace Cyber-physicai Systems Analysis And Design Methods

Cyber-physical systems is a multidimensional complex systems that integrates physical process, calculation process and control process. It can achieve real-time sensing, dynamic control and information services of large engineering systems, has important and broad application prospects. Lunar rover’s cyber-physical systems involves wide range of areas, such as Mechanical, electronic, control, communications, computing, mechanics, physics and so on. Because of that it must be abstracted, analysised, designed, modeled and simulated by a unified description language. And because it relates to many aspects of hardware and software, two tools must be used to modeling and analysis for hardware and software. Modelica that is a multi-domain modeling language and AADL that has a strong ability to describe embedded software can complete the expansion, analysis and modeling of the lunar rover’s cyber-physical systems.The article analysis the discrete, continuous of cyber-physical systems, lunar rover’s body structure, body parts, the system function and kinematic. It defines the lunar rover’s cyber-physical systems is a multi-field, multi-level, large and complex systems. Then when comes to physical processes modeling it proposes the significance and some deficiencies of physical modeling, and the chief deficiency is that universal simulation tool is difficult to adapt to different physical systems modeling, this leads to the next generation of multi-field unified modeling language Modelica, it can fix the deficiency. Then use Modelica to expanse and analysis lunar rover’s cyber-physical systems, including lunar rover’s frame, wheels, cantilever and robotic arm. In the physical details of the analysis is complete, the software modeling part of lunar rover’s cyber-physical systems uses the AADL on design and modeling. The whole system is split into measurement systems, control systems, perform system three subsystems, and each subsystem is maked a reasonable modeling, given details of modeling and modeling components. Data exchange between the various subsystems also provides a good interface. Finally, the paper explains how the Modelica and AADL complement each other to complete the expansion and analysis of the lunar rover’s cyber-physical systems.