Structural design of a cartesian coordinate tooth-arrangement robot
Aiming to the problem of time-consuming and low precision of the traditional tooth-arrangement methods, a conception of a professional and miniature Cartesian coordinate type robot for tooth-arrangement was put forward in this paper. Based on the analysis of tooth-arrangement process, the design scheme of tooth-arrangement robot were determined. We also build the whole three-dimensional model of Cartesian coordinate type robot of tooth-arrangement after functional analysis of every function module of tooth-arrangement robot. Finally, the kinematics simulation analysis of robot model using ADAMS is performed, and the results indicates that it is feasible and practical to realize the scheme design and structural design of Cartesian coordinate tooth-arrangement robot.
An electric power monitoring and management system based on wireless sensor network
This paper thus presents an electric power monitoring and management system based on the wireless sensor network (WSN). This system utilizes ADE7755 for electric power measurement, ATmega 48 as the microcontroller (MCU) and Texas Instruments (TI)'s CC1100 for real-time wireless data communication. Moreover, a master-slave polling wireless protocol with trunk relay function is designed to achieve more efficient in functionality. Furthermore, the monitoring node can measure multiple electric parameters including current and voltage besides electric power. This system is cheap, easy to implement, low cost and reliable so it could be applied in the electric power management of residential communities, schools, plants, and street lights.
Computer-Aided System of Virtual Testing of Gas Turbine Engines
The article describes the concept of a virtual lab that includes subsystem of gas turbine engine simulation, subsystem of experiment planning, subsystem of measurement errors simulation, subsystem of simulator identification and others. The basis for virtual lab development is the computer-aided system of thermogasdynamic research and analysis “ASTRA”. The features of gas turbine engine transient modes simulator are described. The principal difference between the simulators of transient and stationary modes of gas turbine engines is that the energy balance of the compressor and turbine becomes not applicable. The computer-aided system of virtual gas turbine engine testing was created using the developed transient modes simulator. This system solves the tasks of operational (throttling, speed, climatic, altitude) characteristics calculation, analysis of transient dynamics and selection of optimal control laws. Besides, the system of virtual gas turbine engine testing is a clear demonstration of gas turbine engine working process and the regularities of engine elements collaboration. The interface of the system of virtual gas turbine engine testing is described in the article and some screenshots of the interface elements are provided. The developed system of virtual gas turbine engine testing provides means for reducing the laboriousness of gas turbine engines testing. Besides, the implementation of this system in the learning process allows the diversification of lab works and therefore improve the quality of training.