道路运输车辆达标车型整车主动安全项目测试简析

道路运输车辆达标车型的实施,有效提升了道路运输车辆的安全性能。文章主要从电子稳定性控制系统、车道偏离预警系统、前向碰撞预警系统、自动紧急制动系统四个整车主动安全测试项目对道路运输车辆达标车型相应标准进行介绍,为道路运输车辆达标车型相关从业人员提供了主动安全整车项目试验参考。     

Wind Generator Stabilization with Doubly-Fed Asynchronous Machine

This paper investigates the function of doubly-fed asynchronous machine(DASM)with emphasis placed on its ability to the stabilization of the power system including wind generators.P(active power)and Q(reactive power)compensation from DASM can be regulated independently through secondary-excitation controlling.Simulation results by power system computer aided design(PSCAD)show that DASM can restore the wind-generator system to a normal operating condition rapidly even following severe transmission-line failures.Comparison studies have also been performed between wind turbine pitch control and proposed method.     

Study and Development of the Biped Ice Skating Robot with Passive Wheels

A new passive wheel type of biped ice-skating robot(BISR)which was able to imitate human skating motion was developed. Firstly, the characteristics of two types of human skating gait were introduced; secondly, after simplifying the kinematical model, the BISR's motion principle was presented; then the construction and control system of BISR were proposed; at last, the skating experiment of the BISR in a symmetric gait mode was conducted and some conclusions were drawn.     

Development of an Autonomous Flight Control System for Small Size Unmanned Helicopter Based on Dynamical Model

It is devoted to the development of an autonomous flight control system for small size unmanned helicopter based on dynamical model. At first, the mathematical model of a small size helicopter is described. After that simple but effective MTCV control algorithm was proposed. The whole flight control algorithm is composed of two parts: orientation controller based on the model for rotation dynamics and a robust position controller for a double integrator. The MTCV block is also used to achieve translation velocity control. To demonstrate the performance of the presented algorithm, simulation results and results achieved in real flight experiments were presented.     

Study on Distributed Motion of Self-Reconfigurable Robot Based on Local Rules

The eigenvector of a module with six adjacent module's state was constructed according to self-reconfigurable robot M-Cubes and the configuration of system was expressed with the eigenvectors of all modules.According to the configuration and motion characteristics of the modules,a 3-dimension motion rule set was provided.The rule sets of each module was run according to eigenvector of the module after the motion direction of system decided and motion rules were selected.At last,the rapid and effective motion and metamorphosis were realized in system.The rule sets are operated on three systems and the distributed motion of system is fully realized.The result of simulation shows that the 3-dimension motion rule sets has perfect applicability and extensibility.The motion steps and communication load of the modules increase with the module number in linear.     

Design for Two-degree-of-freedom PID Regulator Based on Improved Generalized Extremal Optimization Algorithm

A kind of new design method for two-degree-of-freedom(2DOF)PID regulator was presented,in which,a new global search heuristic--improved generalized extremal optimization(GEO)algorithm is applied to the parameter optimization design of 2DOF PID regulator.The simulated results show that very good dynamic response performance of both command tracking and disturbance rejection characteristics can be achieved simultaneously.At the same time,the comparisons of simulation results with the improved GA,the basic GEO and the improved GEO were given.From the comparisons,it is shown that the improved GEO algorithm is competitive in performance with the GA and basic GEO and is an attractive tool to be used in the design of two-degree-of-freedom PID regulator.     

浅谈建筑施工企业工程造价控制的若干方法

对建筑施工企业而言,建设工程项目的成本直接关系到项目的成败,关系到建筑施工企业的发展,同时也是工程竞标的主要因素。阐述了建筑施工企业工程造价控制的一些做法,诸如:合理预测工程项目的成本,抓好工程实施阶段的成本控制和做好工程实施阶段实质性管理工作。由此实现施工管理效益最大化。     

集装箱码头现代化、智能化管理的科学分析

阐述了如何缩短集装箱船舶在港停泊时间,增强码头堆场集装箱的周转能力,提高集装箱船舶的装卸速度等3个方面的见解,提出了一些具体的举措,这些措施对实现集装箱码头现代化、智能化管理起到了重要作用。     

浅谈秦皇岛港煤五期码头设备的管理与维护

介绍了秦皇岛港煤五期工程投入生产以来,在设备管理和保养方面的一些具体方法。指出加强对码头设备维护保养,对提高作业效率和企业竞争力的重要意义。     

短线法节段梁预制和架设施工质量控制技术研究

短线法预制施工和“先简支后连续”的节段拼装架设施工工艺复杂,施工难度高,质量控制难度大,有必要对其施工质量控制关键技术进行深入研究。本文以某高架桥项目为工程依托,对测量、混凝土浇筑、预应力工程、节段梁涂胶、临时张拉几个关键工序进行施工质量控制技术研究,在实际施工中取得了良好的成效,可为今后类似工程的施工提供参考。