基于区域面积权重分配的舰船舱室照明设计

按照船舶照明规范要求,结合舱室内区域平均照度标准,通过计算舱室整体照明光通量,以功能区域面积作为权重因子分配室内总需光通量,从而得到不同区域匹配的所需光通量,最终根据区域内灯光光通量与灯具布置要求确定灯具功率并完成灯具选型。最后,以DIAlux软件为验证工具,通过输入灯具参数和灯具布局信息进行计算,结果证明,本计算方法能满足照明设计的要求。     

开放式网络运动控制系统的研究

结合开放式系统需求,开发了一种开放式网络运动控制系统。采用"NC嵌入PC"结构,采用基于PCI总线的运动控制卡完成实时控制,以Windows为开发平台,利用Winsock控件,完成了开发客户端和控制服务器端的程序设计,实现了基于C/S结构的网络运动控制系统。实验表明,速度曲线中电机实际转速与给定转速波形基本相同,延时很小(4 ms),匀速段速度波动很小(±1%),误差只有±3脉冲,运行平稳没有速度超调,定位准确实时可靠,控制灵活、速度运行宽,具有友好的人机界面接口设计。     

ZGM-113K型中速磨煤机磨辊最佳堆焊周期的选择

内蒙古国华准格尔发电有限责任公司4台330 MW燃煤发电机组采用ZGM-113K型中速磨煤机,对磨煤机磨辊进行定期堆焊后可以重复使用。该公司磨煤机磨辊原堆焊周期为1～2 a,在堆焊周期内存在磨辊磨损量超标等问题。通过建立数据分析模型,观察磨煤机单耗增加的规律,发现磨煤机连续运行5110 h后单耗急剧增加,经过分析论证,认为磨煤机在连续运行5110 h后进行堆焊,经济性较好。     

Estimation of image scale variations in monocular visual odometry systems

Reliable estimation of the vehicle position is the main prerequisite in all autonomous mobile robotic applications. Image‐scale uncertainty in correlation‐based monocular visual odometry systems negatively affects the accuracy of the vehicle motion estimation. This paper presents the development of a new technique and algorithm to estimate image‐scale variations due to camera height fluctuations when the vehicle is driven on uneven terrains or when the height of vehicle from ground changes as a result of changes in load or number of passengers in the vehicle. This technique depends on marking the image frames by two red laser points, as independent reference points, which have a certain distance between them. The image‐scale variations can be estimated by monitoring the variations in the distance between these two reference points. The proposed technique eliminates the need for camera recalibration and the use of sensors to measure the variations of camera height from ground, such as laser range finders and acceleration sensors. The developed system uses a single downward‐facing monocular camera supported by a lighting module and installed underneath the test vehicle to avoid the negative effect of directional sunlight and shadows, which can disturb the correlation. Indoor and outdoor experiments have proven the efficiency of the suggested technique in resolving image‐scale uncertainty and ensuring an image‐scale‐invariant correlation‐based matching, with only less than 5% additional computational time. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Real haptics and its applications

Real haptics has been an unsolved problem since its beginning in the 1940s. After much R&D, including the early works in the United States and other countries, bilateral control designed in the acceleration space is a solution for this issue. The quality of touch and tactile sensation is heavily dependent on the transparency between the master side and the slave side. Robust motion control, which is equivalent to acceleration control, gives high transparency. Real haptics is now a key concept in 21st century where the quality of life should be the basis of our society. Various examples are also given. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

改进滑模控制的轮毂驱动桥稳定性研究

轮毂电机驱动可以极大的简化底盘机械结构,提高车辆的控制精度。首先在Catia软件中建立了11自由度的轮毂驱动车辆模块式模型,然后在MATLAB/Simulink环境下设计了改进型滑模控制的分层控制策略,对上下层控制器进行控制策略分析,提出了融合改进的非线性滑模控制方法,该策略不仅提高了鲁棒性和响应速度,还能有较强的抗干扰能力,最后采用实车对改进型滑模-分层控制策略用J型工况和蛇形工况进行验证。仿真和试验结果表明采用该策略能够显著提高轮毂驱动桥车辆运动的稳定性和动力传递效率。     

DAMS-Ⅳ型智能分布式安全监测系统在三峡船闸的应用

摘要：本文介绍了三峡船闸安全监测自动化系统的总体结构,着重论述了DAMS-IV型智能分布式安全监测系统的现场监测网络结构和系统的功能与性能,为大坝及水工建筑物安全监测自动化系统提供一个方案参考。     

触点竞争的简易判断方法

提出了用动作顺序图来判断电气控制线路中是否存在触点竞争现象的方法。     

Third-order trajectory planning for high accuracy point-to-point motion

This article studies a third-order trajectory planning method for point-to-point motion. All available instances for third-order trajectory planning are first analyzed. To distinguish those, three criteria are presented relying on trajectory characteristics. Following that, a fast preprocessing approach considering the trajectory as a whole is given based on the criteria constructed and system constraints. Also, the time-optimality of the trajectory is obtained. The relevant formulas are derived with the combination of geometrical symmetry of trajectory and area method. As a result, an accurate algorithm and its implementation procedure are proposed. The experimental results show the effectiveness and precision of the proposed method. The presented algorithm has been applied in semiconductor manufacturing equipment successfully. __________ Translated from Journal of Huazhong University of Science and Technology (Natural Science Edition), 2007, 35(12): 58–61 [译自: 华中科技大学学报 (自然科学版)]     

无人值守变电站运动检测算法研究

提出了一种基于比率图像的运动检测算法。针对目前研究普遍使用的差分图像的不足,结合光学知识,得到了比率图像的累计直方图,并根据累计直方图和运动对象在图像中的特点提出了一种可行的阈值分割方法,并与传统Ostu方法的二值化结果比较。最后对该阈值分割方法进行评价。实验及应用结果表明,该算法对于运动物体侵入的异常检测率比较高。