Control Protocol of Finite Dimensional Quantum Systems

An analytic control protocol of two types of finite dimensional quantum systems is proposed. The system can be driven to an arbitrary target state using cosine classical fields in finite cycles. The control parameters which are time periods of interaction between systems and control fields in each cycle are connected with the probability amplitudes of target states via trigonometrical functions and can be determined analytically.     

Control Protocol of Finite Dimensional Quantum Systems

An analytic control protocol of two types of finite dimensional quantum systems is proposed. The system can be driven to an arbitrary target state using cosine classical fields in finite cycles. The control parameters which are time periods of interaction between systems and control fields in each cycle are connected with the probability amplitudes of target states via trigonometrical functions and can be determined analytically.     

自适应控制在HL-2A等离子体电流控制中的应用

研究了一种新型的坚实可靠的自适应控制算法在HL-2A装置等离子体电流控制中的应用,并使用MATLAB进行了计算机仿真。结果表明,该控制方法与典型的PID控制相比,能显著地提高系统的动态响应性能。且具有较好的抗干扰性。     

星光Ⅱ激光装置自动控制系统的研制

星光Ⅱ激光装置是一台能够输出三种波长的高功率钕玻璃激光系统，主要用于ICF基准物理实验。详细介绍了星光Ⅱ激光装置自动控制系统的研制情况，该控制系统对我国新一代高功率固体激光驱动器控制系统的设计具有一定参考价值。     

Local sensing/control or global error sensing/control in structural acoustics: A comparison of two techniques influence over sound power

The active control of radiation from large structures is a difficult, though important practical problem. The major reason for the difficulty is the ‘system’ size, as a large number of sensors and actuators are required for successful implementation, thus making it hard to design a robust, efficient system that integrates all sensors and actuators. This work examines the active attenuation of the global error, sound power, from the point of view of two sensing/control strategies that seek to be generalised; thus are applicable to a wide range of applications and are independent of knowledge of structural dynamics. In each approach the idea is that the required hardware can simply be attached, turned on, and immediately being to attenuate global noise. The two strategies are compared based on the level of attenuation of the global error sound power, the attenuation per total control force, and attenuation per actuator (in a structural-acoustic situation). The first strategy is the collocated-decentralised approach, which is built on measuring and controlling local vibration in an attempt to influence the global acoustic error. An alternative approach, termed the hybrid approach is firstly developed. The approach is termed ‘hybrid’ because it is a mix between a fully ‘centralised’ and ‘decentralised’ approach; but still measuring and controlling the global acoustic error directly. The attenuation of sound power is compared for both strategies on two structural sources; using 16 identically placed velocity sensors and 16 secondary point sources, in simulation in an attempt to suggest efficient sensing and control approaches for the global control of sound radiation from large structural sources.     

状态反馈和参数调整控制离散非线性系统的倍周期分岔和混沌

利用系统的状态反馈和参数调节的方法，有效地实现了离散非线性动力系统的倍周期分岔的延迟控制和混沌吸引子中不稳定周期轨道的控制.同时，通过选择合适的调控参数，可以将系统从一个2n周期轨道控制到2m(m关键词： 状态反馈 参量调节 混沌控制 分岔控制     

Adaptive control of bifurcation and chaos in a time-delayed system

In this paper, the stabilization of a continuous time-delayed system is considered. To control the bifurcation and chaos in a time-delayed system, a parameter perturbation control and a hybrid control are proposed. Then, to ensure the asymptotic stability of the system in the presence of unexpected system parameter changes, the adaptive control idea is introduced, i.e., the perturbation control parameter and the hybrid control parameter are automatically tuned according to the adaptation laws, respectively. The adaptation algorithms are constructed based on the Lyapunov-Krasovskii stability theorem. The adaptive parameter perturbation control and the adaptive hybrid control methods improve the corresponding constant control methods. They have the advantages of increased stability, adaptability to the changes of the system parameters, control cost saving, and simplicity. Numerical simulations for a well-known chaotic time-delayed system are performed to demonstrate the feasibility and superiority of the proposed control methods. Besides, comparison of the two adaptive control methods are made in an experimental study.     

光学消像旋高精度位置控制系统的算法与实现

为了解决周视光电观瞄设备中光学消像旋齿轮传动所带来的误差大、间隙难以控制等不足,本文提出去掉光学消像旋的机械传动,将其变为无机械传动的位置控制系统.结合现代控制理论,在分析了光学消像旋位置控制系统中被控对象模型的基础上,设计以比例-积分-微分控制器为主,非线性控制为辅的融合控制算法.以单片机C8051作为控制核心,编码器作为位置传感器,光电转台方位角度作为控制信号,组成位置控制系统并进行调试、试验测试,测试结果表明其实现的光学消像旋性能优于含有机械传动的光学消像旋性能,最终实现光学消像旋高精度位置控制.     

平流层飞艇通信系统载荷舱热控设计

分析了平流层飞艇通信系统的工作热环境.提出了以被动热控为主,主动热控为辅的载荷舱热控系统设计思路,给出了隔热、等温化、加热和液体循环回路等热控手段的具体设计方法.     

Passive adaptive control of chaos in synchronous reluctance motor

The performance of synchronous reluctance motor (SynRM) degrades due to chaos when its systemic parameters fall into a certain area. To control the undesirable chaos in SynRM, a passive control law is presented in this paper, which transforms the chaotic SynRM into an equivalent passive system. It is proved that the equivalent system can be asymptotically stabilized at the set equilibrium point, namely, chaos in SynRM can be controlled. Moreover, in order to eliminate the influence of undeterministic parameters, an adaptive law is introduced into the designed controller. Computer simulation results show that the proposed controller is very effective and robust against the uncertainties in systemic parameters. The present study may help to maintain the secure operation of industrial servo drive system.     

Passive adaptive control of chaos in synchronous reluctance motor

The performance of synchronous reluctance motor （SynRM） degrades due to chaos when its systemic parameters fall into a certain area. To control the undesirable chaos in SynRM, a passive control law is presented in this paper, which transforms the chaotic SynRM into an equivalent passive system. It is proved that the equivalent system can be asymptotically stabilized at the set equilibrium point, namely, chaos in SynRM can be controlled. Moreover, in order to eliminate the influence of undeterministic parameters, an adaptive law is introduced into the designed controller. Computer simulation results show that the proposed controller is very effective and robust against the uncertainties in systemic parameters. The present study may help to maintain the secure operation of industrial servo drive system.     

一种微小型无人船控制系统设计及航向控制方法研究

无人船在保护海洋环境和开发海洋资源方面具有广泛的应用前景和市场价值。微小型无人船不仅可以用于海洋环境监测,也可以作为海上通信中继平台,在军事应用领域也有其潜在应用价值。本文设计了一种基于ARM的微小型无人船控制系统,同时进行了详细的控制系统硬件设计和软件设计,并通过水池实验结果验证了该控制系统的有效性和实用性。此外,针对无人船航行过程中存在风浪流混合干扰的问题,设计了一种自适应模糊PD航向控制算法,进行了相应的水池试验并与传统PD控制算法进行了对比分析。     

参数不确定永磁同步电机混沌的模糊脉冲控制

通过Takagi-Sugen控制技术和脉冲控制技术,建立了参数不确定永磁同步电机的Takagi-Sugen模糊脉冲控制模型,然后利用矩阵分析和Lyapunov稳定性理论,得到了参数不确定永磁同步电机渐进稳定和指数稳定的充分条件,最后通过实例证实了该结果的正确性,相比传统的控制方法,基于Takagi-Sugen模型的模糊脉冲控制方法具有一定的优越性. 关键词： 混沌控制 模糊控制 脉冲控制 永磁同步电机     

柔性关节机器人全局渐近稳定PID算法控制

"小误差放大,大误差饱和"函数能够提高柔性关节机器人位置的控制品质。利用这一函数,提出了比例-非线性微分加实时重力补偿(P-ND+)位置控制算法。应用Lyapunov稳定性理论和La Salles不变性原理证明了闭环系统的全局渐近稳定性。通过仿真,采用P-ND+算法能使机械臂和关节的稳定时间从1s减小到0.2s左右,结果表明该算法比传统算法响应速度更快,验证了提出的非线性控制(P-ND+)相对于传统的线性(PD+)控制具有更好的控制品质。     

Minimum energy control and optimal-satisfactory control of Boolean control network

In the literatures, to transfer the Boolean control network from the initial state to the desired state, the expenditure of energy has been rarely considered. Motivated by this, this Letter investigates the minimum energy control and optimal-satisfactory control of Boolean control network. Based on the semi-tensor product of matrices and Floyd?s algorithm, minimum energy, constrained minimum energy and optimal-satisfactory control design for Boolean control network are given respectively. A numerical example is presented to illustrate the efficiency of the obtained results.     

Feedback control strategies for the Liu chaotic system

This Letter proposed three strategies of the dislocated feedback control, enhancing feedback control and speed feedback control of the Liu chaotic system to its unstable equilibrium points. It is found that the coefficients of enhancing feedback control and speed feedback control are smaller than those of ordinary feedback control, so, the complexity and cost of the system control are reduced. Theoretical analysis and numerical simulation are given, revealing the effectiveness of these strategies.     

基于飞行器网络控制系统的多速率控制器设计

为了减少网络环境中的时延和数据包丢失对飞行器网络控制器系统的影响,设计了一种具有多速率的保性能控制器设计方法;多速率是指在具有多通道数据传输的系统中,各通道所需控制输入的频率不完全相同;在存在时延和丢包的情况下,利用增广技术对飞行器控制系统在整个循环周期内建立离散模型,此时为了使多速率控制方法更加有效,先基于此模型在控制器输入端构造一个预测器,根据预测器的输出为整个系统设计一个具有多控制速率的动态输出反馈控制器;然后给出并证明保性能控制器的存在条件和求解方法;最后通过某飞行器网络控制系统的数值算例验证了所提方法的有效性。     

Adaptive fuzzy nonlinear inversion-based control for uncertain chaotic systems

<正>This paper presents a robust output feedback control method for uncertain chaotic systems,which comprises a nonlinear inversion-based controller with a fuzzy robust compensator.The proposed controller eliminates the unknown nonlinear function by using a fuzzy system,whose inputs are not the state variables but feedback error signals.The underlying stability analysis as well as parameter update law design are carried out by using the Lyapunov-based technique.The proposed method indicates that the nonlinear inversion-based control approach can also be applied to uncertain chaotic systems.Theoretical results are illustrated through two simulation examples.     

自适应光学中的控制算法设计与仿真

对自适应光学系统中的控制算法设计进行了整体研究。首先对自适应光学系统各模块的物理特性进行了分析,并在此基础上建立了系统整体的数学模型。针对传统处理含有纯滞后环节系统近似方法的不足,文章采用直接求解系统传递函数幅频和相频解析函数的方法来对系统特性进行分析,通过比较系统的开环特性、闭环特性、误差和噪声传递特性等对三种控制方法（积分控制、PI控制和Smith控制）的控制品质进行了分析。分析和仿真结果表明,Smith控制方法对自适应光学系统能够达到较好的控制效果,为实际系统的设计提供了理论指导。     

压缩系统喘振主动控制方式的数值分析

本文在压缩系统非定常流动理论基础上，用经典控制理论中的PID控制方法和非线性控制理论中的逆系统方法对多种喘振主动控制方式进行了数值分析，对比了不同控制方法、控制参数和结构参数对控制效果的影响，给出了喘振主动控制系统设计的参考准则。