Abstract
A cyber physical system (CPS) is an integration of computers and physical systems. In a CPS, the physical system is integrated with sensing, communication, and computing components. This research aims at constructing a framework for the cyber physical system, including a virtual system as well as a physical system. To demonstrate the capability of the constructed cyber physical system, we designed an experiment platform of a hydrostatic linear stage as the real physical system. Within the virtual system, we constructed the simulation model for each component, which was able to characterize the feature of the physical system. To reduce the complexity, the system model of each component was categorized into four major properties: static, dynamic, tolerancing design, and sensing & controlling. Then, we established the corresponding module to describe each property. The static module included properties, for example, the geometries, materials and loading parameters, while the dynamic module stated the derived dynamic performance of the corresponding static properties. The tolerancing module predicted the final performance after considering manufacturing uncertainty. The sensors, actuators, and controller were included in the fourth module to communicate between the virtual and physical systems. Using the CPS, we predicted the performance of the linear stage while designing, controlling, and maintaining the physical system after manufacturing. We will closely look into the extensibility of the framework; other advanced options may be added in the future.