In this chapter, it is presented a utilization of a novel tool for symbolic regression, which is analytic programming, for the purpose of the synthesis of a new feedback control law. This new synthesized chaotic controller secures the fully stabilization of selected discrete chaotic systems, which is the two-dimensional Lozi map. The paper consists of the descriptions of analytic programming as well as selected chaotic system, used heuristic and cost function design. For experimentation, Self-Organizing Migrating Algorithm (SOMA) and Differential evolution (DE) were used. Two selected experiments are detailed described.

关键词：分析编程；符号回归；混沌控制

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An unprecedented challenge of the new generation launch vehicle control is its four parallel strap-on engines are oscillateable by the servomechanism. It increases the manoeuvrability of the vehicle and the control complexity simultaneously. The chapter investigates actuator failure compensation for new generation launch vehicle control. A control reconfiguration scheme of fault-tolerant control is developed to enhance the reliability of launch vehicle attitude control systems and prevent the control invalidation caused by the deadlock of the oscillating actuator, based on the congruity of the composite moment before and after the failure happens. This reconfiguration scheme is capable of utilizing the remaining control authority to achieve the desired performance in the presence of deadlock at certain detectable angle occurring in one or several actuators at unknown time instants.

关键词：启动车辆；容错性；控制重配置；姿态跟踪

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为了改善柴油机瞬态加载过程中燃烧与排放性能恶化的问题,在一台增压中冷柴油机上,利用瞬态测控系统,试验研究了先快后慢的多段加载策略,探索不同的加载停滞时间对柴油机θCA10,θCA50,烟度和CO,NOx等排放物的影响规律。试验结果表明:与匀速加载策略相比,加载停滞时间越长,排放性能越好,烟度和CO峰值最大分别降低20.8%和38.32%,但NOx略有增加;在第二段加载过程中θCA10和θCA50延后程度降低;加载过程后期缸内空燃比下降趋势更加缓和。

关键词：增压柴油机；瞬态工况；加载策略；排放；燃烧相位

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针对一台车用天然气发动机排气能量的变化规律,建立了带回热器有机朗肯循环系统,对比分析了采用纯工质R245fa和非共沸混合工质R416A时,带回热器有机朗肯循环系统的净输出功率、热效率、效率和单位工质能量输出密度。结果表明,采用非共沸混合工质R416A时上述各项性能指标均优于采用纯工质R245fa。最后,构建了天然气发动机-带回热器有机朗肯循环联合系统,采用非共沸混合工质R416A,分析了联合系统的热效率。结果表明,加装带回热器有机朗肯循环系统后,发动机热效率最大可提高7%。

关键词：天然气发动机；余热回收；有机朗肯循环；非共沸混合工质

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The terminal sliding mode (TSM) control method has become a hot topic in recent years due to its special merit on finite-time convergence and good robustness. One critical issue is how to balance the singularity of control law and the fast convergence of closed-loop system. The chapter reviews the research history of the singularity and introduces the recent advance on nonsingular and fast terminal sliding mode (NFTSM) control method. The synthesis of NFTSM controller synthesis is based on a newly proposed nonsingular fast terminal function and a terminal attrac-tor with nonnegative exponential coefficient. Both theoretical analyses and computer simulations have proved its effectiveness under the condition that plant uncertainties are bounded.

关键词：终端滑模；控制方式；非负指数系数

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In the paper a robust Model Predictive Control structure for speed regulation of a drive system with an elastic transmission is proposed. A methodology for robust design based on suitable selection of the explicit form of MPC which enables the drive's safety and physical limitations to be directly incorporated into control synthesis is presented. The simulation results show that the controller is very effective in regulating load speed for a wide-range of the changes of the load side inertia. The simulation studies are confirmed through a variety of experimental tests.

关键词：鲁棒模型；预测；控制器

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Security is an important aspect of modern information management systems. The crucial role of security in this systems demands the use of tools and applications that are thoroughly validated and verified. However, the testing phase is an effort consuming activity that requires reliable supporting tools for speeding up this costly stage. Access control systems, based on the integration of new and existing tools are available in the Service Development Environment (SDE). We introduce an Access Control Testing toolchain (ACT) for designing and testing access control policies that includes the following features: (ⅰ) the graphical specification of an access control model and its translation into an XACML policy; (ⅱ) the derivation of test cases and their execution against the XACML policy; (ⅲ) the assessment of compliance between the XACML policy execution and the access control model. In addition, we illustrate the use of the ACT toolchain on a case study.

关键词：安全性；控制器；信息化管理系统

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为了有效控制柴油机NOx排放量,采用等体积浸渍法制备了一系列不同组合含量的钨基催化剂及掺杂不同过渡金属M的改性催化剂M-V2O5-WO3/TiO2(其中M可以是Ni,Zr,Fe,Cu),分别对两类催化剂进行了SCR脱硝活性测试,并进一步用XRD,TEM和NH3-TPD对催化剂进行了表征。研究表明,催化剂掺杂金属Zr时的催化效率较高,在低温(150℃)时也有较高的活性。催化剂活性增加的原因可能是掺杂金属Zr加强了V,W及载体TiO2的分散性,提高氧化还原能力和表面酸性,从而促进SCR性能。

关键词：氮氧化物；选择性催化还原；浸渍法；钒钨金属氧化物；催化剂

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为抑制不确定参数汽车制动器的制动噪声,基于区间分析理论,将响应面法与优化技术相结合,提出了一种降低系统复模态负阻尼比以提高汽车制动器稳定性的优化方法。该方法采用拉丁超立方试验设计在设计变量和不确定参数构成的混合空间内采样,建立了包含不确定参数的制动器系统复模态负阻尼比的响应面近似模型;以系统结构参数为设计变量,以最小化系统复模态负阻尼比为优化目标,利用基于区间分析的不确定性优化方法对响应面近似模型进行优化。对某型车的浮钳盘式制动器的优化结果表明,采用该方法对汽车制动器进行优化,能在整个使用周期内有效减小制动器不稳定模态的负阻尼比,从而提高制动器的稳定性。

关键词：制动噪声；不确定性；区间分析；优化

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In the present investigation novel needle-processed S2-glass laminates are fabricated and several key failure modes are characterized. Double cantilever beam testing shows that mode I fracture toughness improves up to 270% compared to non-needled baseline material. In-plane compressive strength of needled material improves by up to 475%. In plane tensile strength shows mixed results, improving by 6% for moderate volume fractions of through- thickness reinforcement (TTR) and decreasing by 6% at larger volume fractions. Double lap shear tests show that interlaminar shear strength improves as much as 17% for TTR inserted at 45 relative to the laminate plane. X-ray micro- computed tomography (micro-CT) is used to investigate the unique 3D microstructure resulting from the needling process for 90 TTR samples. The micro-CT reconstructions show that the dimensions of the disturbances of the inplane fabric are significantly smaller than those imparted by the conventional tufting or stitching processes at each penetration site. Micro-CT reveals that some penetration sites are aggregates of closely spaced neighbors, resulting from the lack of precise spatial control with the needling process used in the present research. At these aggregate locations the in-plane disturbances are roughly equal in size to those from tufting/stitching.

关键词：表征；复合材料；抗压强度；层间

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