Advanced Materials Research Vols. 816-817

Abstract: This paper presents a novel energy-efficient single-phase permanent magnet synchronous motor with three-phase stator windings which are connected to two external capacitors in series connection, supplied by the single-phase AC power. The positive sequence impedance and negative sequence impedance of the novel single-phase permanent magnet synchronous motor are presented based on the symmetrical component method, the condition for balanced operation is analyzed and the method for determining the requested capacitances is also obtained. The simulation model of the motor is constructed in d-q stationary reference frame. The transient performance of the proposed motor is simulated and the simulation results proved the validity of the proposed motor.

Abstract: This article studies headphone shell injection molding crafts analysis and mold design. According to mold structure crafts characteristics and customer requirements, we find out the best location of plastic injection, rational arrangement of the shunt and reasonable side core-pulling mechanism by using Pro/E, which simplifies mold structure, reduces mold manufacturing cost and provides a strong theoretical basis for the rationality of mold design.

Abstract: The main objective of the research was to study the effect of cryogenic treatment and double tempering on the tool life of HSS profile cutter in machining EN47 Spring Steel cutting tool components. TiAlN coated HSS profile cutters were cryogenically treated at-175 °C and double tempered at 200 °C. Milling exercises were carried out using un-treated and treated and double tempered tools on EN-47 spring steel reamer components at different machining conditions. The treated HSS profile cutter showed 40 % greater tool life than that of the un-treated in machining EN-47 spring steel components for making flutes. FEA for temperature profile of the cutting tools of the treated and non-treated was performed. Tool tip temperature for untreated and treated were found to be 22 °C and 20 °C respectively.

Abstract: N80 waterproof casing is a kind of important equipment in petroleum drilling. In order to analyze the mechanical features of the N80 casing, we used pendulum impact testing machine to test the shock resistance of N80 casing. And we have analyzed and eliminated the errors which may affect the result of the impact test to ensure the reliability. At the same time, it summed up the causes of errors and the methods to avoid and reduce the errors during the pendulum impact test, and analyzed the sample selection method, the chosen of impact surface, the structure as well as the temperature influence, shape and other factors which influenced the measurement results.

Abstract: This article analysis the characteristic of the actual production of the float glass in the tin bath under the environment. The author use the method of dynamic optical measurement to measure the thickness of the glass. The process use semiconductor as the light source and linear array CCD as the censor to get the data at 600°C. By analyzing large amount of dynamic experiment data and the analysis of the measuring equipment, using edge measuring and pixel subdivision technique on the software, the author have several discussions and come up with some compensate steps towards the effect of the accuracy of the system. Within the effective range of the thickness of glass from 2~20mm, the accuracy of dynamic online measurement can reach 5µm; the accuracy of the statics online measurement is less than 1µm.

Abstract: Aiming at the 2.4m×2.4m wind tunnel, this paper introduces the floating suspension system (“FSS”) in the full-mode flutter test, analyzes the impact of the model’s “free” movement to the elastic vibration mode and verifies the control effect of the system to the pitching and rolling movements of the model. Test results show that the FSS system may realize the free movement of the flutter model in five directions other than the axial direction without impacting the elastic vibration mode; FSS system controls through two independent channels, namely, the pitch and the roll; load reduction on the model and the steel wire may be realized by cutting down the pitch and roll angles of the model and the control of FSS to the pitching and rolling movement of the model get guaranteed by selecting appropriate control parameters.

Abstract: For a class of double-loop networked control system with differential sampling periods is studied in this paper. Its mathematical model is set up based on time-delay theory, and its stability conditions are obtained based on Lyapunov-Krasovskii functional and free-weighting matrices approach. On this basis, the design method of the controller to stabilize this networked control system with state feedback is explained. Finally, an example of the inverted pendulum is presented to test the validity and effectiveness of the methods proposed in this paper.

Abstract: Based on the problem of complex wiring, low anti-interference capacity and high cost in wired measurement and control system, we developed and designed a cable parameters acquisition and control system based on ZigBee technology. The system was composed of upper PC, a coordinator node and five data collection nodes, presents the hardware circuit and software design method of the coordinator node based on CC2530, and developed the PC management software based on LabVIEW. By the measurement that five data collection nodes are distributed in the indoor, the actual results show that the system is stable, and high reliability.

Abstract: Artificial climate chamber is a kind of experimental and scientific equipment that can simulate the natural environment. Temperature and humidity are the main control parameters. At present, at home and abroad , most of temperature and humidity control algorithms of the artificial climate chamber belong to single factor control, they all ignoring the coupling problem between temperature and humidity. This process cannot ensure the accuracy of the system, and it is easy to cause system oscillation. Thus, in this paper, we use an algorithm called the feed-forward decoupling to eliminate the coupling between the temperature and humidity through the way of feed-forward compensation, finally we design the temperature and humidity fuzzy controller respectively as the single factor control.

Abstract: Hydraulic system has been used very widely in the modern stage system, through the hydraulic system of the stage, we can realize many function of the stage, such as lifting and revolve, and this makes the effect of the performance even better.[1] But the hydraulic stage system is relatively huge, failure is inevitable, and the causes of system failure are varied. In recent years, the casualties caused by the system are abounding. We can set up the mathematical model, to provide theoretical support for the monitoring and control system in the hydraulic system of the stage.