DZZ5型自动气象站多媒体故障排查系统的设计与研发

为更有针对性地进行故障排除工作,文章设计研发了一款多媒体软件平台,嵌入细化后的DZZ5型自动气象站各观测要素的故障排查流程,并在相应故障检测节点中添加文字、图片和操作视频。用户可按照流程逐一进行排查操作,或者搜索关键字查看节点内容。同时提供带有关键字查询功能的故障实例库,供基层装备保障业务人员参考。     

On the feasibility of on-farm biogas-to-electricity conversion: To what extent is solid oxide fuel cells durability a threat to break even the initial investment?

Despite their promising features, adverse economic feasibility still hamper SOFCs wide implementation and this effect is emphasized as long as the system size is reduced. According to previous investigations, the biogas pre-treatment section represents a burden for the economic viability. Aiming at reducing the extent of installation costs in SOFC-based configurations, biogas partial upgrading through CO₂ gas-separation membranes is put forth as innovative solution against reforming. This innovative system concept is expected to make SOFCs more cost-effective, yet resulting feeding gas might cause a quicker SOFC performance decay. Besides solving this trade-off, the economic viability results strongly sensitive to subsidiary electricity prices in force according to the regulatory framework.This paper presents a comparative economic assessment regarding biogas-to-electricity conversion via Solid Oxide fuel cells (SOFCs) and mature technologies as internal combustion engines (ICEs). Results highlighted that, the innovative SOFC system is far more viable than reforming-based one, exhibiting a reasonable payback time, with an adequate subsidized electricity sale price (4 and 5 years for small/medium and large-size plants respectively when subsidy is 0.28 €/kWh), up to 1%_1000h degradation rate. On the other hand, whilst considering a SOFC degradation rate of 0.03%_1000h, the reforming-based system appears feasible only on large-size plants, yet recovering the initial capital expenditure in 9 years. Moreover, once the break-even point is reached, the gain in the net revenue produced by the innovative system is amplified in the event of small-size installation. This allows the possibility to undertake the risk of higher degradation rates (up to 2%_1000h) without jeopardizing the economic profitability. Therefore, in the present regulatory framework and under current capital costs projections, the innovative SOFC system appears as much profitable as ICE mature technology. Such effort in the design of the fuel pre-treatment unit can lever SOFC broad spreading into the market of small biogas producers.     

垃圾焚烧炉炉排风量测量方法的比较研究

自动燃烧控制(ACC)系统是垃圾焚烧自动控制的核心技术。基于ACC系统原理,并结合垃圾焚烧炉在不同场景下的风量测量特点,分析了均速管流量计、双文丘里流量计、热式质量流量计等主流流量计的测量原理和优缺点,为垃圾焚烧发电厂流量计选型提供依据。     

一次盐水精制工艺的优化改造

对一次盐水系统存在的控制瓶颈进行分析,膜法除硝改造后闲置设备的利用和自动控制的综合运用,优化盐水控制系统,减少盐质变化和过碱量变化的因素对盐水质量的影响。     

国内农用拖拉机自动转向系统研究现状

作为精准农业的重要组成部分,农用拖拉机自动转向系统的研究也越来越多。通过对相关文献进行梳理和分析,分别从自动转向系统的两个组成部分(自动转向执行机构和自动转向控制系统)阐述国内农用拖拉机自动转向系统的研究成果,为设计合理的自动转向执行机构和稳定准确的自动转向控制系统提供建议和参考。     

承钢精粉供应模式探索

承钢探索合理的精粉供应模式,解决了原料场地储存能力小,使用精粉矿点多、成分复杂的不利影响。通过精粉分类、前延管理、系统监控等手段,实现了混合料质量稳定,为烧结系统提供质量稳定的混合料。在目前严峻的市场条件下,探索以管理手段代替占用大量资金的传统料场管理模式的可行性。     

立式真空淬火炉自动离合吊具的研制

采用有限元分析方法,对立式真空淬火炉自动离合吊具的结构形式、受力及载荷进行了计算和分析。新型自动离合吊具适用能力强,载荷力大,弥补了原有吊具设备的缺陷和不足,满足了真空淬火炉对吊具的要求。     

基于非线性干扰观测器的自动弹仓终端滑模控制

针对某自动弹仓位置控制过程中的负载变化和不确定性干扰，设计了基于干扰观测器和非奇异快速终端滑模的复合控制策略，建立了自动弹仓的不确定性动力学模型。干扰观测器用于估计系统复合干扰，估计值用于补偿滑模控制器以增强控制器的鲁棒性和抗干扰能力。运用Lyapunov准则证明了系统闭环稳定。所提算法和PID算法的对比实验结果显示，设计的控制律实现了自动弹仓位置的精确控制，具有良好的鲁棒性，有效提高了自动弹仓的定位稳定性。     

基于工业机器人的液压支架导向套柔性制造系统

自动化技术在小批量多品种的产品制造中，存在兼容难、换产时间长、人工干预多等问题，导致生产线难以高效率运行。设计的柔性制造系统，在充分分析了导向套不同结构、不同规格的基础上，以一套六关节机器人和行走地轨作为物流搬运设备，同时负责3台数控设备、自动辊道上料设备、自动堆垛下料设备、翻转机构、打标机构及抽检机构的上下料，并通过使用机器人双工位卡爪、机床六爪卡盘、自动刀补等卡具及技术，实现了一键换产，极大提高了制造系统的柔性。