Advanced Materials Research Vols. 846-847

Abstract: The energy crisis and environmental pollution are two big problems that today's world facing. Solar electric automobile will have great significance for solving the energy crisis and environmental pollution. This article from the main advantages of solar electric vehicles start, elaborated the basic structure, working principle, key technology and the problem need to solve of solar electric vehicle, to provide reference for the future research and development.

Abstract: In this paper, a steering wheel angle and torque acquisition program consisted of a steering wheel angle and torque sensor, 16-bit Σ-A/D converter, SCM and CAN bus chip is described. It describes the A / D conversion, angle and torque values calculation , CAN Communication and host computer acquisition software implementation and other important processes for the method. On this basis, the steering wheel angle and torque data collection realization is finished,and it has operated in the actual vehicle environments. The results show that the system is of high precision, good stability, and it is suitable for driving behavior tests and vehicle handling and stability test.

Abstract: Superheat control of refrigeration system features large time-delay. When the operation conditions change, it is difficult for a traditional PID controller with fixed parameters to achieve ideal control effects. Consider the advantage of traditional PID and generalized predictive control (GPC) algorithm, a new PID algorithm based on GPC is proposed in this paper. After obtaining the system model by using the least square identification, the solution of Diophantine equation is used for the PID parameters, which can change adaptive according to the operation conditions. And the simulation results in the last part of the paper prove the efficiency of strategy.

Abstract: In this article, we analysis the developing situation of Power Fiber To The Home (PFTTH) in abroad. And research the construction situation of FTH in Shenyang to solve the actual problem in FTH construction. This will do a steady spade work for Integration of Three Net and National Electric Net Ltd to build strong intelligent power grid.

Abstract: Let-off system application of computer and electronic technology, may at any time adjust the loom is likely to change in the process of weaving yarn tension and density, thus improve the quality of the fabric. In this paper, based on the study of the function of the let-off motion, let-off servo control system is established the mathematical model of the warp beam unwinding; According to the carbon fiber Angle of multilayer union loom warp tension requirement, design a set of tension compensation device,and established the mathematical model of back rest. Easy and convenient, the whole control system has better reliability and real-time performance.

Abstract: This paper focuses on an active vibration isolator based on voice-coil motor (VCM). The isolator may reduce the vibration in the range from 5 to 100Hz in one DOF which can provide the payloads on a satellite a more stable working environment. A VCM is designed and optimized to provide enough feedback force; the state-space model is established according to the basic governing equations of the VCM. The LQR controller based on a reduced-order observer is designed for an output feedback control system. The vibration isolation system is verified by numerical simulations and experiments in which the VCM is installed between the payload and the excitation bottom, with an accelerometer located on the payload in the vertical direction. Both the simulation and experiment results show that the vibration of the payload is reduced effectively using the voice-coil actuator designed here.

Abstract: Due to the complex structure, high frequency of occurrence of the fault signal and the short cycle, it is difficult to form long lasting identifiable characteristics for intelligent instruments. The traditional fault detected model is difficult to effectively extract short fault signal, and unable to form meaningful fault recognition model, resulting in difficulties in the detection. In order to solve these problems, this paper presents a mining method for fault symptoms of the intelligent instruments based on the neural network model. The method uses the fault characteristic of the intelligent instrument as its basic data, according which to build neural network model in order to realize fault mining. The experiment results show that the proposed method can instantly detect the failure of the intelligent instruments, according to which the treatment can be carried out rapidly and accurately to ensure the performance of the instruments.

Abstract: Due to the difficulty to build accuracy mathematical model, the traditional method has some problems in setting system parameters. At the same time, the deficiency in the system control reduces the reliability and the safety of control system of PLC large mechanical lifting equipments leading to low control quality. In order to solve the problems, this paper presents a PID algorithm and applies it in to the control of PLC large mechanical lifting equipments. The experimental results show that the algorithm effectively realizes the self-tuning of PID parameters and increases the control quality of PLC large mechanical lifting equipments.

Abstract: Traditional algorithms for large-scale water control system need to realize control according to mathematical model which makes the parameters setting difficult. At the same time, certain defects in the control effects reduce the safety and the reliability of the system, thus it is hardly to satisfy the normal operation of the water control system. In order to avoid the defects in traditional algorithms, this paper proposes a design method for large-scale water control system bases on PLC and applies it in the actual control process. The results show that the proposed algorithm can effectively improve the accuracy of the large-scale water control system.

Abstract: Aimed at the disadvantage of conventional ip-iq method based on instantaneous reactive power theory, a novel algorithm is presented in this paper. The detection of reactive current is obtained by voltage and current double closed-loop control based on ip-iq instantaneous value. The method is faced to impact load such as motor load increasing or decreasing suddenly. The good of using closed-loop is to make the load current follow the current issued by SVG in real time. That is to say the real-time following of reactive current is implemented. Simulation results verify the validity of the presented algorithm in the paper.