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为了能及时准确地诊断发动机的传感器和执行机构故障,文章提出了基于一组卡尔曼滤波器信息融合的方法进行故障诊断;首先根据传感器特性设计了一组滤波器用于传感器故障诊断、隔离,每个滤波器针对一个传感器进行设计;其次根据执行机构故障特性设计了一组卡尔曼滤波器进行执行机构偏差估计,从而对执行机构进行故障诊断、隔离;接着给出了传感器、执行机构信息融合的诊断方案;最后分别给传感器、执行机构添加故障进行方案验证,仿真结果得出在传感器或者执行机构任意部件出故障的情况下,该融合方法可以有效地诊断并隔离出有故障的传感器或者执行机构。 相似文献
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徐瑞堂 《南昌大学学报(理科版)》1985,9(2):1
本文概述了应用此仪器进行“新酒老化用微波能设备的微机控制”研制项目的一个实例,它要求酒窑进口温度70℃、出口温度20℃,若偏离此值,则控制执行机构调节微波能设备的电压和槽出口处阀门流量的大小,此仪器的电脑系统只用了数块Z80芯片,执行机构是步进电机。 相似文献
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具有滞后型执行机构的Lurie控制系统的绝对稳定性 总被引:3,自引:0,他引:3
本对于具有滞后型执行机构的Lurie控制系统,构造了一个关于Liqpunov泛函中自由参数的LMI,通过这个LMI的解来构造Liapunov泛函保证系统了的绝对稳定性,最后给出实例说明本方法的有效性。 相似文献
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In remote sensing or laser communication space missions, spacecraft need fast maneuver and fast stabilization in order to accomplish agile imaging and attitude tracking tasks. However, fast attitude maneuvers can easily cause elastic deformations and vibrations in flexible appendages of the spacecraft. This paper focuses on this problem and deals with the combined control of fast attitude maneuver and sta- bilization for large complex spacecraft. The mathematical model of complex spacecraft with flexible appendages and momentum bias actuators on board is presented. Based on the plant model and combined with the feedback controller, modal parameters of the closed-loop system are calculated, and a multiple mode input shaper utilizing the modal information is designed to suppress vibrations. Aiming at reducing vibrations excited by attitude maneuver, a quintic polynomial form rotation path planning is proposed with constraints on the actuators and the angular velocity taken into account. Attitude maneuver simulation results of the control systems with input shaper or path planning in loop are sepa- rately analyzed, and based on the analysis, a combined control strategy is presented with both path planning and input shaper in loop. Simulation results show that the combined control strategy satisfies the complex spacecraft's require- ment of fast maneuver and stabilization with the actuators' torque limitation satisfied at the same time. 相似文献
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激光时序控制系统采用计算机(以下称PLC—k位机)和PLC相结合的方式,如图l所示。整个系统的结构分为三层:系统管理层、PLC控制层、分系统控制层或现场执行机构。系统管理层完成时序控制系统的任务设定、信息显示、状态监测、故障报警、数据处理和通信等功能,由一台工业控制计算机实现。该层与PLC之间通过以太网通讯,遵循TCP/IP协议。PLC控制层直接与各个分系统连接,完成时序控制,是激光时序控制系统的关键。这个层次的PLC模块主要完成数据采集、时序控制等任务。分系统控制层执行指令动作,并把必要的信息反馈给PLC控制层。 相似文献
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With the theory of radiation modes,piezoceramics are used as control actuators in the active control of sound radiation.According to the characteristics of the first four radiation mode shapes,the arrangement of four group of actuators is presented.Theoretical analysis and numerical calculation demonstrate that the four group of actuators can not only reduce the sound power effectively,but also decouple the control equations.While controlling of the sound powers of the first four radiation modes,these actuators can convert the complicated control system with multiple input/output into several simple and independent systems with single input/output. 相似文献
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