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关键词： 智能拉烟器   飞行器飞行表演   自动控制  

摘要： 目前,大部分的拉烟器需要手动拉烟,且烟带形式单一,在飞行表演中使用限制多,装置加装难度大,且用于小型旋翼无人机的拉烟器研究很少。为了弥补上述缺陷,提高拉烟器的实用性,设计了一种由导气装置、开关装置、生烟装置、控制装置和固定装置组成的智能拉烟器,详细阐述了其机械结构的设计思路,并基于拉烟器设计制作了相应的控制电路。通过半物理仿真验证了拉烟器包括手动拉烟、自动拉烟和智能拉烟等预期功能,优化了现有拉烟器的实用性,扩展了拉烟器的适用范围。

关键词： 小型泵站   大型泵站   直流电动机调速   位置传感器   高速摄影机   实测曲线   自动控制   直流调速系统  

摘要： 开篇:泵站的最高运行能效是否可以准确预测?对于大型泵站,最高运行能效完全可以准确预测且完全可以实现,对于二次供水等小型泵站,则完全可以准确地给出最高运行能效的实测曲线和数据,这是本人对泵站节能工作的看法和信心。一、泵站能效预知技术的研究背景和历程本人第一次完成直流电动机调速项目是在1985年,在中科院攻读硕士学位期间,独立设计完成了一个单片机直流调速系统,用H桥和PWM方式控制直流电动机的转速和方向,通过位置传感器形成闭环,对高速摄影机的焦距进行自动控制。

关键词： Excavator   automatic control   retrofit   accuracy test   remote control  

摘要： Excavators are widely used at various construction sites, and they can significantly reduce difficulties during construction and improve construction efficiency. However, conventional excavators still exhibit many shortcomings. In certain construction environments that require precision, the construction accuracy cannot be guaranteed because excavators usually operate in harsh environments. Hence, they can cause potential life hazards to the drivers in certain situations. To address these issues, an excavator automatic control system is developed via retrofitting, modelling, and designing a control program for an excavator. This system can realise three working modes: manual operation, remote control operation, and automatic operation. A test prototype based on the aforementioned concept is developed and relevant experiments are performed. The results under automatic operation mode show that the automatic control system can move the excavator smoothly along the expected trajectory. The fluctuation in the operation velocity is low, and the positioning error to the target position is within 7 cm. Thus, the system can realise the desired control accuracy and satisfy other task design requirements.

关键词： Antilock braking system (ABS)   Engine control unit (ECU)   Directional control valve (DCV)   Control system   Lyapunov's stability  

摘要： The antilock braking system (ABS) is intended to augment braking effectiveness, maintains understeer and oversteer conditions. The braking system performance is degraded in the case of severe road conditions. The research paper presented the effectiveness of smart hybrid antilock braking system in automobiles. The concept of antilock braking system and manual braking system is anticipated to a single unit to overcome the problem facing in the braking system in vehicles. Lyapunov's theoretical stability approach is used for the system stability. The concept of smart control development is used to solve system complexity and real time issues in different road conditions. Directional Control Valve (DCV) plays very important role in controlling the flow direction of brake oil. The Electronic Control Unit (ECU) is the slip controller for antilock braking system, which takes inputs from brake pedal, speed of all four wheels and various road conditions, processes the accumulated data to generate corresponding PWM signal for the DCVs. The ignition switch and ECU controls the activation and de-activation of directional control valve. The MATLAB/Simulink, 2015 version and experimental analysis using Automation Studio verified the model behavior in both ABS and manual braking mode. The system performance is analyzed during ignition 'ON' and 'OFF' conditions. The comparative study of the ABS mode and manual mode against wheel speed and vehicle speed is predicted in different time intervals. The smart hybrid ABS control provides better response in comparison to conventional braking. It is experimentally proved that the acclaimed antilock braking system reduces the stopping distance in comparison to the manual braking unit.

关键词： PLC   煤矿井下排水   自动控制系统   设计  

摘要： PLC技术是指利用可以编程的存储器对内部的指令进行操作,利用数字或是模拟输入加强控制效果。本文主要从PLC模块着手,就PLC控制体系设计内容、煤矿井下排水自动控制系统设计以及监控原理进行了研究,希望能够以此来进一步发挥出PLC模块对于煤矿井下排水工作的促进作用,最大限度保障煤矿井下生产工作的安全性。

关键词： 脱硝   SCR   氨逃逸   精准喷氨   自动控制  

摘要： 近几年国内各大燃煤电厂均有出现脱硝系统氨逃逸量大、空预器运行堵塞、NOx排放超标等问题,严重影响机组的安全稳定运行。以上问题的出现主要由于机组脱硝系统喷氨不均及局部喷氨过剩造成。由于炉膛管道内部烟气流场分布不均匀,管道截面NOx实际含量不同,单点测量无法真实反映管道内NOx实际含量,就地喷氨控制由各个喷氨管路的手动阀门控制,由于烟道内氮氧化物浓度随着机组运行工况随时变化,各个喷氨管路的喷氨量不能与之相匹配,测量不准确及喷氨手动门无法实际动态调整导致出现局部喷氨量过大或是过低的现象,引起氨逃逸局部增加,氮氧化物浓度超标现象,造成空预器堵塞等问题的发生,因此,脱硝系统精准喷氨改造势在必行。

关键词： PLC技术   电气自动控制   应用探讨  

摘要： 近几年来,我国的科技发展迅猛,推动了技术模式、应用机制等方面的快速发展。它广泛应用于自动化技术中。电力自动化技术在生产和生活中起着举足轻重的作用,这也促使相关部门对其进行集中管理和控制。本文根据PLC在电气自动控制中的实际应用情况探究了其优势性,促进PLC技术在该行业内的进一步发展。

关键词： 自动控制系统   污水处理   应用  

摘要： 水资源是人们赖以生存的宝贵资源,但是现阶段我国水资源的使用现状十分的严峻,其会呈现出一种短缺的使用状态。随着社会经济水平的提升,水资源也受到了一定的污染,这就导致人们能够使用的淡水资源量变得越来越少,因此,必须要及时的进行污水的处理,降低水污染的程度,合理的使用自动控制系统,打破传统污水处理的固化局面。本文主要就自动控制系统在污水处理当中的应用进行分析,发挥出该系统运用的成效,及时的处理水污染的问题。