Concept Of Virtual Devices Research Articles

Robust Energy-Efficient Resource Allocation for IoT-Powered Cyber-Physical-Social Smart Systems With Virtualization

To promote future intelligent systems, a novel cyber-physical-social smart system (CPS3) powered by the Internet of Things is presented in this paper, where wireless network virtualization is adopted to enhance the diversity and the flexibility of the service operation and the system management. Based on the presented system, a robust energy-efficient resource allocation scheme is proposed to guarantee the outage probability requirements of controllers and actuators while realizing the maximization of the system energy efficiency. Different from the existing works, imperfect channel state information is studied for energy-efficient resource allocation in CPS3. To effectively handle the formulated optimization problem, the concept of virtual devices is introduced to equivalently reformulate the original problem. Afterward, the probabilistic mixed problem is approximately transformed into a nonprobabilistic problem though outage probability analyses. After the transformation, the optimization problem can be decomposed into power allocation and channel allocation, where an iterative algorithm for power allocation is adopted to maximize the system energy, and a heuristic greedy algorithm is presented to schedule sensors and actuators on different subchannels based on the obtained power allocation results. Simulation results demonstrate the convergency of the proposed algorithm and the advantages of the proposed scheme.

Experiment automation using digital signal processing methods

Theoretical methods and algorithms of digital signal processing (DSP), as well as certain approaches to practical implementation of the experiments in industrial and laboratory measurements and tests are considered, based on utilization of ZETLab hardware-software complex. An example of real-time evaluating the spatial coordinates for the source of low-intensity vibration (noise disturbance) is provided. The concept of virtual device (VD) serves as the foundation in planning and implementing the experiment; note that the actual hardware components, i.e., seismometers and analog-to-digital converters (ADC), are involved in the process, having PC interface as a certain link among the measurement object, mathematical framework and operator. The suggested method of coordinate evaluation operates according to the logic based on spectrum and correlation analysis of the signals, with subsequent data visualization via reciprocal projection technique.

Virtual Devices and Intelligent Gripper Control in Robotics

SUMMARYThis paper is concerned with the design of intelligent subsystems that interface actuators and sensors to intelligent supervisors for robot work-cells. Benefits of our approach include removal of low level computation and stringent real-time constraints from the superviser, potential for combining and interpreting information from sensor combinations, and provision of a uniform information interface for disparate devices. Our approach to the design and organisation of these subsystems is based on the concept of virtual devices. We demonstrate the applicability of the concept by describing the design and implementation of an intelligent controller for a sensory gripper.