Applied Mechanics and Materials Vol. 387

Abstract: In order to give full play to the airport for civil aviation security performance of the machinery and equipment, improve military efficiency as the goal, the whole life cycle of the product, a set of evaluation criteria and the guidelines by using mathematical methods to quantify, the establishment of a mechanicalinnovative design program evaluation preferred method and model.

Abstract: In this paper, bionic design of the sled motor body has been introduced on the basis of the main structural features of sled motor. The bionic design included the body design and color design. The theories of the law of formal beauty for the shape and color collocation have been rationally analyzed. And the conclusion has been achieved that there is one process from sensibility to rationality in the bionic model design and color design. It is also the design process, rule and pattern of the abstract form in bionic design.

Abstract: A type of direct current controlled static reactive power compensator (DSTATCOM) used for improvement of voltage quality in low-medium distribution network is introduced. The main circuit of DSTATCOM consists of VSI-SPWM voltage source inverter. The extraction of reference current and the tracking control of compensator current are realized in synchronous reference frame. The function of DSTATCOM to mitigate voltage sag and flicker is presented in this paper and the control mode of DSTATCOM is discussed in detail. The function of DSTATCOM to mitigate voltage sag and flicker under different control mode is simulated with MATLAB. The simulation results shows that the current control mode is suitable for mitigating voltage flicker and the voltage control mode is suitable for mitigating voltage sag.

Abstract: This paper targets on the study of the motion control system for greenhouse robots, and researches into the realization of the linear track control algorithm on robots motion control, demonstrating the feasibility and stability constraint of the algorithms. The author also analyzes the impact of different control parameters on the moving tracks through simulation, then applies the algorithm to the actual robot-controlling, and has designed an effective controlling system for mobile greenhouse robots based on gyroscopes and photoelectric encoder.

Abstract: Static Frequency Converter (SFC) is the key control device of reversible pump storage unit. By inputting a variable frequent current to the corresponding stator windings, the SFC can steadily start the synchronous motor. In this process, rotor position detecting accuracy comes to be the key point, but at the ultra-low speed period, the motors terminal voltage is too low to accurate sampling and is also vulnerable to the interference, which brings risks to the variable frequency starting. In this paper, two initial rotor position detection methods are compared, one is based on the voltage vector, and the other is based on adapt flux observer. At last, a 300MW/15.75kV pump storage unit with a 6 pulses SFC are built on the RTDS platform to exam the control strategy.

Abstract: In this paper, based on the research of the tea intelligent crank technology parameter, we could control the temperature of the tea with the method of controlling the heating resistor through the MCU .We have designed a set of computer control system to provide a basis for the tea production automation in the future.

Abstract: The precision plug tray seeder is mainly used to implement precision seeding, and it is the key equipment to accomplish the goal of mechanized and automated seedling in the greenhouse. The plug seedlings planter can greatly improve the productivity of labor and reduce labor intensity at the same time. The seed metering device is the core component of precision plug tray planter. Its performance directly influences the production, the sowing quality and the cost. The purpose of this paper is to introduce the study of the plug seedlings planter for domestic and abroad, and particularly Introduce three typical seeder (plate-typeneedle-likeroller-type). Keywords:Seeder;Seed Metering Device;Plug Seedlings;Greenhouse.

Abstract: This paper introduces foreign airborne guiding ammunition automatic testing equipment development history and current situation, analyzed our Army airborne guiding ammunition automatic testing equipment development and existing problems, putting forward my Army Airborne guiding ammunition testing equipment development proposal.

Abstract: Based on the electric vehicle steering and speed models, this paper discussed the control problems of the electric vehicle steering and speed systems. Firstly, the electric vehicle speed control system is designed using the fuzzy PID controller. Then the electric vehicle steering controller is a fuzzy controller. Due to the coupled effect of speed in the steering control system, designing a fuzzy decoupling controller, reducing the coupled effect of speed, in order to control the system of steering model and speed model independently, and to achieve the purpose of decoupling. Finally, the result of simulation proves that no matter how speed changes, steering control system still has good tracking performance with decoupling controller. The systemic robustness is much stronger and it also enhances the utility of the control system.

Abstract: In this paper, a new two-level cooperative control system is proposed for the vehicles steering antilock braking stability fields. The architecture is composed with the execution layer with anti-lock brake control system and the cooperation layer developed on a new cooperative error model. It is quite feasible because of its analytical form. Finally, the stability and the validity of the control algorithm are validated by simulation results.