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排序方式: 共有92条查询结果,搜索用时 140 毫秒
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为解决传统巷道内空调通风系统存在的信息采集准确率较低,性能较差、抗震巷道环境难以改善等问题,提出设计一种新的抗震巷道内空调通风系统。先将系统的整体架构划分为采集层、控制层和监管层三部分,以主控制器为核心,对系统各执行组件做出正确地判断,并对各组件进行统一化控制,完成系统的硬件设计;创建中心服务器信息处理过程,设定风机运行指令,主动采集风速等环境信息,获取实际环境状态,将设定值与实际值进行对比,依据对比结果判断风机是否正常运行,实现系统软件功能的开发。实验结果表明,在不同的震级条件下,该系统能够有效改善抗震巷道环境,系统的信息采集准确率高达85%左右,充分验证了该系统的优越性。 相似文献
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详述数字电极的系统构成、电路结构、通信协议和其他关键技术。该系统的通信网络结构基于RS-485现场总线,通过环境测试和台站试验,发现数字电极技术适用于多极距电阻率系统。 相似文献
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针对多频激电仪中接收机对发送机和控制器无法进行智能远程控制的现状,开发了一套基于GPRS的多频激电仪远程测控系统.该系统由通信模块、上位机和下位机组成.通信模块由3块插入SIM卡的DTU组成,它通过短信方式完成远程数据传输功能,实现上位机和下位机之间的数据通信.上位机作为本系统的主动站,负责发起连接,对下位机进行状态监测和功能控制.下位机作为从动站,等待上位机的连接,并执行上位机的各种控制命令,在发生紧急事件的时候能主动向上位机报警.3个模块在该系统中相互协调,共同完成系统的各项功能.试验表明,该控制系统能够正常工作,在野外工作时能降低劳动强度,提高工作效率. 相似文献
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Development of a hybrid simulation controller for full‐scale experimental investigation of seismic retrofits for soft‐story woodframe buildings 下载免费PDF全文
Xiaoyun Shao Weichiang Pang Chelsea Griffith Ershad Ziaei John van de Lindt 《地震工程与结构动力学》2016,45(8):1233-1249
Hybrid simulations of a full‐scale soft‐story woodframe building specimen with various retrofits were carried out as part of the Network for Earthquake Engineering Simulation Research project – NEES‐Soft: seismic risk reduction for soft‐story woodframe buildings. The test structure in the hybrid simulation was a three‐story woodframe building that was divided into a numerical substructure of the first story with various retrofits and a full‐scale physical substructure of the upper two stories. Four long‐stroke actuators, two at the second floor and two at the roof diaphragm, were attached to the physical substructure to impose the simulated seismic responses including both translation and in‐plane rotation. Challenges associated with this first implementation of a full‐scale hybrid simulation on a woodframe building were identified. This paper presents the development and validation of a scalable and robust hybrid simulation controller for efficient test site deployment. The development consisted of three incremental validation phases ranging from small‐scale, mid‐scale, to full‐scale tests conducted at three laboratories. Experimental setup, procedure, and results of each phase of the controller development are discussed, demonstrating the effectiveness and efficiency of the incremental controller development approach for large‐scale hybrid simulation programs with complex test setup. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Fuzzy logic controller (FLC) performance is greatly dependent on its inference rules. In most cases, the more rules being applied to an FLC, the accuracy of the control action is enhanced. Nevertheless, a large set of rules requires more computation time. As a result, an FLC implementation requires fast and high performance processors. This paper describes a simplified control scheme to design a fuzzy logic controller (FLC) for an underwater vehicle namely, deep submergence rescue vehicle (DSRV). The proposed method, known as the single input fuzzy logic controller (SIFLC), reduces the conventional two-input FLC (CFLC) to a single input FLC. The SIFLC offers significant reduction in rule inferences and simplifies the tuning process of control parameters. The performance of the proposed controller is validated via simulation by using the marine systems simulator (MSS) on the Matlab/Simulink® platform. During simulation, the DSRV is subjected to ocean wave disturbances. The results indicate that the SIFLC, Mamdani and Sugeno type CFLC give identical response to the same input sets. However, an SIFLC requires very minimum tuning effort and its execution time is in the orders of two magnitudes less than CFLC. 相似文献
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Gian Paolo Cimellaro 《地震工程与工程振动(英文版)》2009,8(4):607-616
This paper presents an approach for the optimal design of a new retrofi t technique called weakening and damping that is valid for civil engineering inelastic structures.An alternative design methodology is developed with respect to the existing ones that is able to determine the locations and the magnitude of weakening and/or softening of structural elements and adding damping while insuring structural stability.An optimal polynomial controller that is a summation of polynomials in nonlinear states is used... 相似文献
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