共查询到20条相似文献,搜索用时 31 毫秒
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基于ZigBee的塔机群控无线通信系统实验研究 总被引:1,自引:0,他引:1
建立了基于ZigBee技术的塔机群无线通信系统,通过性能测试获得了无线模块实际工作参数,进行理论计算、环境分析及数据分析,实现了塔机群监控系统的无线通信,为塔机机群监控和信息管理开创了新的方向. 相似文献
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为了研究无线网络控制系统在不同网络负载下时延对系统性能的影响,首先根据无线网络负载状态对网络时延进行分析,给出系统的数学模型,并结合网络负载状态对系统模型作了分析,然后给出了控制器性能指标,利用DLQR(离散线性二次最优设计)方法优化控制器,并就时延对控制性能的影响进行了分析,实现了通过对网络负载状态的调节使系统控制器性能达到最优。最后应用数学模型,通过仿真验证了该研究方法和结果的有效性。 相似文献
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简要概述了加强群塔集中管理的必要性以及通用无线分组业务(general packet radio service,GPRS)的应用现状;通过群塔系统的特点分析,提出基于GPRS的群塔数据无线传输方案,解决了工地监控中心与远程群塔集中管理中心的通信问题;然后从软硬件两方面完成基于GPRS技术的群塔数据传输终端设计,并且对基于GPRS网络的无线数据传输系统进行调试,根据调试结果对软件进行了修改完善,最终实现了数据的可靠传输. 相似文献
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力矩控制广泛应用于汽车起重机、轮胎起重机、铁路轨道起重机、履带起重机、塔式起重机、门座起重机和高空作业车等机械设备,该设计是基于现代物联网的基本技术手段,通过其实现设备动态的接入,可完成局域范围内的数据交换,满足有限距离的通讯需要,并可以通过无线网络连接成大系统,各终端设备与服务器之间的数据交互。文中介绍了基于ZigBee与GPRS技术的力矩控制终端系统设计,经实际检验,系统工作可靠,可广泛应用于工业、农业、交通、物流、电力、水利、环保等行业的相关设备的力矩控制。 相似文献
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Hyun Cheol Cho M. Sami Fadali Young Jin Lee Kwon Soon Lee 《Journal of Mechanical Science and Technology》2006,20(5):591-601
In this paper, we present a new control methodology for perturbed crane systems. Nonlinear crane systems are transformed to
linear models by feedback linearization. An inverse dynamic equation is applied to compute the system PD control force. The
PD control parameters are selected based on a nominal model and are therefore suboptimal for a perturbed system. To achieve
the desired performance despite model perturbations, we construct a neural network auxiliary controller to compensate for
modeling errors and disturbances. The overall control input is the sum of the nominal PD control and the neural auxiliary
control. The neural network is iteratively trained with a perturbed system until acceptable performance is attained. We apply
the proposed control scheme to 2- and 3-degree-of-freedom (D.O.F.) crane systems, with known bounds on the payload mass. The
effectiveness of the control approach is numerically demonstrated through computer simulation experiments. 相似文献
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为解决无线网络控制系统中传输模型的问题,建立了无线网络传输中网络延时和数据丢包之间的数学模型,为无线网络控制器的设计提供了充分的无线网络特性,可以将网络实时仿真技术应用到对无线网络控制系统的研究中,提出了用基于Matlab/Simu—link的网络仿真工具箱TmeTime构建一个无线网络的仿真模型。该仿真模型中的节点可自由移动,且有干扰节点,采用了AODV路由协议进行路由的自主选择,以实现两个节点之间互相通信。然后通过仿真,记录下两节点之间发送、接收数据的时间。结果表明,该模型可以模拟无线网络控制系统中传感器、控制器和执行器之间的通信,可以作为研究无线网络控制传输模型的仿真模型。 相似文献
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随着建筑行业的发展,近年来塔机安全事故时有发生,给人们的生命财产造成很大损失,所以有必要研究塔机全参数实时在线监控仪。该文讨论了基于GPRS网络搭建塔机监控仪系统的实现方案,具体采用AVRMega系列单片机,主从MCU双核协作的工作方式;而软件系统基于MFC连接池、线程池灵活设计方案实现数据传输的实时性,ADO接口支持多种结构数据库的连接,该文讨论的方案已在国内某家塔机制造商得到了应用。 相似文献
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The novel trajectory tracking control strategies for trilateral teleoperation systems with Dual-master/Single-slave robot manipulators under communication constant time delays are proposed in this article. By incorporating this design technique into the neural network (NN) based adaptive control framework, two controllers are designed for the trilateral teleoperation systems in free motion. First, with acceleration measurements, an adaptive controller under the synchronization variables containing the position and velocity error is constructed to guarantee the position and velocity tracking errors between the trilateral teleoperation systems asymptotically converge to zero. Second, without acceleration measurements, an adaptive controller under the new synchronization variables is presented such that the trilateral teleoperation systems can obtain the same trajectory tracking performance as the first controller. Third, in term of establishing suitable Lyapunov–Krasovskii functionals, the asymptotic tracking performances of the trilateral teleoperation systems can be derived independent of the communication constant time delays. Moreover, these two controllers are obtained without the knowledge of upper bounds of the NN approximation errors, respectively. Finally, simulation results are presented to demonstrate the validity of the proposed methods. 相似文献
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Many hydraulic components have non-linearities to some extent. These non-linearities often cause time delays, thus degrading the performance of hydraulic control systems and making it difficult to model them. This paper proposes a new vibration isolation control algorithm that eliminates the need for sophisticated modeling of a hydraulic system. The algorithm is a hybrid-type control scheme consisting of a liner controller and a heterosynaptic neural network controller. Using this control scheme, simulations and experiments were performed for 1 and 2 degrees of freedom vibration isolation. The hybrid-type controller can isolate the vibration significantly better than can the linear controller. Also, from the weight values of the heterosynaptic neural network, a second-order equivalent differential model of the hydraulic control system can be obtained, which provides useful information such as the stability and the characteristics of the control system. 相似文献
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利用ZigBee建立塔机群无线数据传输系统,分析对数据传输有影响的几种因素,进行丢包率和稳定性测试实验,获得不同台数塔机下的发送周期值,确定多台塔机群无线数据传输时的最优发送周期.实验研究可为基于ZigBee的无线数据传输技术在多台塔机监控系统的应用提供借鉴. 相似文献
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为了提高塔机的工作效率及塔机操作人员的安全系数,在保证稳定安全的前提下,作者研究了自动平衡遥控塔式起重机.论文介绍了自动平衡遥控塔式起重机的工作原理,以及塔机无线遥控的工作原理和构成.经过实验验证,该自动平衡遥控塔式起重机有很好的推广应用价值. 相似文献
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提出一种基于无线局域网的塔机群监控技术,研究监控系统的组成、工作原理,设计塔机群的无线局域网通信系统,建立通信模型,通过实验验证基于无线局域网的塔机群通信系统的可行性。 相似文献
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A new linear quadratic regulation (LQ) control plus a proportional (P) control system is proposed for the level regulation in an industrial coke fractionation tower. The process is first stabilized using a P controller and then a subsequent LQ controller is designed for the P control system. The P control system is modeled as a generalized first order plus dead time (FOPDT) process using step-response test and the LQ-P controller is designed through a new state space structure. Performance in terms of regulatory and servo issues were investigated. Simulation results showed that the proposed method is more robust and improves performance than traditional model predictive control. 相似文献
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