共查询到19条相似文献，搜索用时 390 毫秒
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静不稳定控制技术作为现代航空航天、水中兵器主动控制技术,在近些年逐渐成为研究热点。本文针对某静不稳定鱼雷,建立了纵向运动模型,运用最优控制理论设计了俯仰通道三回路过载控制系统,最后对设计出的控制器进行了特征点控制系统仿真。结果说明,三回路过载控制方法能较好地控制静不稳定鱼雷。 相似文献
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针对鱼雷传统技术保障模式单一、效率低、难度大等问题,提出了基于军网的军地一体化远程技术保障系统的设计方案,确定了系统的总体框架,并对网络虚拟仪器、数据仓库、故障诊断、网络安全等关键技术进行了分析。该系统的研究对实现鱼雷远程异地保障和维修消息的互联互通、提高鱼雷技术保障的能力、加快鱼雷装备保障信息化进程具有重要意义。 相似文献
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鱼雷是重要的海军武器装备,在历次海战中发挥了重要的作用,它具有其他武器不可替代的作用,鱼雷所承受的环境要更恶劣,因此对使用的元器件要求更加苛刻,本文介绍了鱼雷对连接器的性能要求,详述了连接器在鱼雷中的应用分布和主要使用类型:焊接圆形连接器、压接圆形连接器。 相似文献
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本文立足装备综合保障的理论基础,结合多年工作实践,对鱼雷综合保障的具体工作,从全系统全寿命角度阐述了其工作内容、方法和程序,以及应把握的问题,探索了鱼雷装备研制管理的新方法,对全面提高装备业务管理,对研制生产质量好、易保障和能顶用鱼雷武器,对促进＂两成两力＂建设具有重要意义。 相似文献
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火箭助飞鱼雷的综合落水散布误差是影响鱼雷发现概率的重要因素,对其进行分析研究有助于客观地评估火箭助飞鱼雷的作战效能。从目标舰船的运动特性和鱼雷水下弹道的分析出发,运用解析法确定鱼雷综合落水散布误差的计算公式,为进一步求解鱼雷的发现概率打下基础。 相似文献
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在介绍装备质量信息的特点和信息系统的内涵及作用的基础上,分析了当前鱼雷装备质量信息收集、分析及管理的现状与存在的问题,指出了和美军的差距,探讨了鱼雷装备全寿命质量动态信息系统的结构,提出的质量信息系统标准化、数据库化、网络化的建议对建设高效的鱼雷装备质量信息系统具有实际的参考意义。 相似文献
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伊朗海军去年在南波斯湾式射超高速鱼雷的消息,引起全世界的关注和美国的不安.尽管伊朗海军没有透露这种鱼雷的具体情况,但有国际传媒指出,这种鱼雷的速度目前世界上只有俄罗斯的＂暴风＂超高速鱼雷才能达到,它实现高速的方法也与＂暴风＂差不多.这样,俄罗斯＂暴风＂超高速鱼雷便成了时下人们最关注的武器之一.＂暴风＂超高速鱼雷在冷战时期开始秘密研制,1977年就投入试用. 相似文献
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A novel adaptive control with σ-modification for uncertain nonlinear systems is proposed in the paper. The application of conventional adaptive control is severely limited by the problems of construction of Lyapunov function and parameter drift because of non-parametric uncertainties. The proposed adaptive control that is on the basis of the immersion and invariance theory and σ-modification can be used to deal with these problems to some extent. It turns out to be a structured design method without requiring a Lyapunov function in the design level and robust to non-parametric uncertainties. Moreover, constrained command filter backstepping is adopted to meet the amplitude and rate constraints on the states and actuators. The uniformly ultimately bounded stability of the closed-loop system has been analyzed by Lyapunov theory with parametric and non-parametric uncertainties of the controlled model. To demonstrate the design flexibility, the method is applied to the position tracking control system design of a mass-damper-spring system and the flight control system design of a scramjet-powered air-breathing hypersonic vehicle. Finally, the effectiveness of the proposed adaptive control method is illustrated by numerical simulations. 相似文献
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介绍一种低成本易兼容的开放式数控机床的控制设计方法，根据该方法设计的数控机床系统所有的功能部件都采用通用的兼容式的数控部件，能够支持通用的数控设备灵活升级或替换，使得所设计的数控机床系统具有良好的兼容性。 相似文献
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A novel control scheme combining disturbance observer technique and back-stepping method is proposed for a class of nonlinear system with multiple mismatched disturbances. The uncertain multiple mismatched disturbances contain not only single harmonic or constant disturbances but also another unexpected nonlinear signal presented as a nonlinear function. The composite adaptive disturbance observers are designed to estimate the disturbances with partial known information. By integrating disturbance observer based control with back-stepping method, a composite controller is designed. Here, the disturbance estimations are introduced into the design of virtual control laws in each step to compensate the mismatched disturbances. Rigorous stability analysis for the closed-loop system is established by direct Lyapunov function method. It is shown that the system output asymptotically converges to zero in spite of existing multiple mismatched disturbances. Finally, a simulation example is applied to demonstrate the effectiveness of the proposed method. 相似文献
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本文应用状态反馈线性化方法对电枢反应非线性进行线性化处理,通过适当的非线性状态变换和输入变换,将速度非线性控制系统综合问题转化为线性系统的综合问题,并采用对系统参数变化及外界扰动具有较强鲁棒性的滑模变结构控制方法,实现了直流电机速度的跟踪控制。 相似文献
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Jian-Xin Xu 《Journal of The Franklin Institute》2012,349(4):1445-1458
In this paper, the sliding mode control (SMC) method is integrated with a nonlinear suboptimal control method based on control Lyapunov function (CLF). According to the system nominal part, a CLF is first constructed in general to facilitate the nonlinear optimal system design and Sontag's formula is used in particular to generate a suboptimal controller. To take system uncertainties into account, the SMC mechanism is designed based on the CLF. By integration, the suboptimal control and SMC are made to function in a complementary manner. When the system state is far away from the equilibrium and the system nominal part is predominant, the nonlinear optimal control part will govern the system response as well as drive the system state approach the equilibrium in an optimal fashion. On the contrary, when approaching the equilibrium such that system perturbations become the main factor, the SMC will take over the control task to warrant the desired robustness property and achieve precise control. 相似文献
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In this paper, the subspace identification based robust fault prediction method which combines optimal track control with adaptive neural network compensation is presented for prediction the fault of unknown nonlinear system. At first, the local approximate linear model based on input-output of unknown system is obtained by subspace identification. The optimal track control is adopted for the approximate model with some unknown uncertainties and external disturbances. An adaptive RBF neural network is added to the track control in order to guarantee the robust tracking ability of the observation system. The effect of the system nonlinearity and the error caused by subspace modeling can be overcome by adaptive tuning of the weights of the RBF neural network online without any requisition of constraint or matching conditions. The stability of the designed closed-loop system is thus proved. A density function estimation method based on state forecasting is then used to judge the fault. The proposed method is applied to fault prediction of model-unknown fighter F-8II of China airforce and the simulation results show that the proposed method can not only predict the fault, but has strong robustness against uncertainties and external disturbances. 相似文献
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CAN总线即控制器局域网总线，特别适合于小型分布式测控系统。本文所述的微机光照控制系统将微机监控技术和现场总线控制技术相结合，构成了一种全分散式微机光照控制系统。该系统的功能强，投资少，可靠性高，便于扩展，有着广阔的应用前景。 相似文献