基于C8051F020的温湿度自动控制系统

以微控制器C8051F020为基础,围绕重点场所温湿度控制的需求,提出了一套简单实用的温湿度监控系统的设计实现.该系统能够实时采集周围环境的温度和湿度值,与人工输入值进行比对,做出控制温湿度的相应动作,同时实时显示系统状态.     

喷雾夹角影响柴油机混合气形成与燃烧的CFD研究

运用CFD软件对直喷柴油机燃烧室中的喷雾及燃烧过程进行数值计算,考察了不同喷雾夹角下燃油的雾化过程、射流的发展形态以及近壁面区域浓度场的分布情况,并将计算结果进行了对比分析。结果表明,高速的射流漩涡对混合气的卷吸能力很强,油束末端的滞止区呈现较高的浓度;喷雾夹角过大会使燃油喷溅到燃烧室壁上,过小则活塞顶隙内的空气利用不充分,均对燃烧过程造成不良影响。     

艇用电能质量分析仪中DSP芯片与AD的接口设计

AD73360是美国AD公司生产的专门用于电力数据采集的高性能六路16位AD采集芯片,TMS320F2812为美国TI公司生产的新型DSP芯片。本文简要介绍两种芯片之间的硬件接口方式与软件的实现方法。     

基于TMS320F2812的船用异步电动机直接转矩控制系统

直接转矩控制（DTC）是一种高性能的交流调速控制技术,数字信号处理器（DSP）的飞速发展促进了DTC的数字化。文中介绍了直接转矩控制的基本原理及TMS320F2812 DSP的特点,给出了以TMS320F2812 DSP为核心的异步电动机直接转矩控制系统的设计方案及软硬件的实现,同时对直接转矩控制系统进行了实验和仿真,验证了直接转矩控制技术的优良性能。     

GK1F内燃机车车载微机系统

详细介绍了GK1F内燃机车车载微机系统的硬件软件设计、技术参数、抗干扰措施和根据机车需要增 加的特殊控制功能,通过运用说明该系统的硬件设计可靠,软件设计合理。     

D09-32捣固车卫星小车作业走行后退控制的改进

简要介绍了D09-32捣回车卫星小车作业走行后退控制的现状及缺陷;详细分析了改进其控制的方法:通过引入卫星小车位置信号FID和大车速度信号FlB增加一路电路单独控制卫星小车自动后退,实现当大车后退时卫星小车能完全与大车处于随动状态.     

车辆智能主动安全系统中的超声波测距

详细地介绍了一种由PIC16F876单片机控制的实时超声波测距系统。该系统测量精度高,安全可靠,能实时监测车身侧面与障碍物之间的距离。     

Generalized F distribution model with random parameters for estimating property damage cost in maritime accidents

ABSTRACT

This study develops a generalized F distribution model with random parameters to estimate the ship property damage cost in maritime traffic accidents with 10 years’ shipping accident data in the Fujian waters. Model results show that sinking and capsizing can incur the largest property damage cost, followed by collisions, contact, grounding and fire/explosion. There is a smaller ship property damage cost when the ship is moored or docked. The poor visibility has the least impact on the increment of ship property damage cost. Results reveal that the bigger property damage cost is associated with maritime accidents occurring in the Straits/sea areas and under the strong wind/wave condition and nighttime periods. It is also found that the lookout failure exhibits a bigger effect than the operation error. These results are helpful for policy makers to make efficient strategies for reducing property damage cost in maritime accidents. The developed model is useful for insurance companies in determining the appropriate ship insurance rates.     

基于DSP的列车振动无线测试系统

给出了列车振动无线测试系统的设计方案,详细介绍了其中TMS320F2407 DSP和AD73360接口电路的软硬件设计方法。实践证明,该系统能够准确、快速、方便地在线测得列车运行的振动参数,为保障行车安全提供有效的依据。     

Steady-state steering of a tilting three-wheeled vehicle

The design of a narrow-track enclosed vehicle for urban transport was the subject of the CLEVER project. Due to its narrow track and requirement for car-like controls, an actively controlled tilting system was integrated into the chassis to allow for high lateral accelerations without rolling over. The cornering behaviour of this unique vehicle concept is investigated and compared with the ideal Ackermann response. The steer kinematics of this 1F1T (one front wheel, one wheel tilting) configuration are assessed through the use of a steady-state steering model, with attention focused on how steer parameters such as tilt axis height and inclination can be tuned to provide the required response. A prototype vehicle was designed and built and the results of experimental testing are presented to illustrate the real balancing performance of the combined steering and tilting approach used for the CLEVER vehicle. The experimental results follow the trends demonstrated in the model.