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Mean-square composite-rotating consensus of second-order systems with communication noises
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We study the mean-square composite-rotating consensus problem of second-order multi-agent systems with communication noises, where all agents rotate around a common center and the center of rotation spins around a fixed point simultaneously. Firstly, a time-varying consensus gain is introduced to attenuate to the effect of communication noises. Secondly, sufficient conditions are obtained for achieving the mean-square composite-rotating consensus. Finally, simulations are provided to demonstrate the effectiveness of the proposed algorithm. 相似文献
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针对不确定二阶多智能体系统,研究了其鲁棒最优一致性问题.首先,基于每个智能体所获得的邻居信息,设计了一个使多智能体系统达到一致的控制协议.其次,研究了多智能体系统的最优一致性问题,给出了系统在满足一定性能指标下达到一致的条件.再次,基于该条件,利用Schur补引理和线性矩阵不等式技术,给出了不确定系统达到鲁棒最优一致的条件.最后,通过仿真验证了所得结果的可行性. 相似文献
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爆炸冲击载荷作用下岩石的损伤实验 总被引:6,自引:0,他引:6
基于声波测试原理,利用RSM-SY5智能型声波仪,对某露天矿围岩在爆破冲击荷载作用下产生的损伤进行了现场实验研究。研究结果表明:爆破冲击荷载对距离爆源7 m范围内的岩石会造成损伤破坏,其损伤程度随着岩石与爆源距离的增大而减小;岩体声波速度随着爆破次数的不断增加而逐渐降低,多次爆破对岩石具有损伤累积效应;多次爆破的累积损伤不是单次爆破损伤的简单叠加,具有非线性特性,且距离爆源越近爆破累积损伤效应越明显。 相似文献
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We performed ultra-low temperature thermal conductivity measurements on the single crystal of a new gold-based quasi-two-dimensional superconductor Au Te_2Se_(4/3), which has a superconducting transition temperature Tc = 2.70 K. A negligible residual linear term κ0/T in zero magnetic field is observed, which suggests fully gapped superconducting state.Furthermore, the field dependence of κ0/T is similar to that of the multi-band s-wave superconductor Ba Fe1.9 Ni0.1 As2 at low field. These results reveal multiple nodeless superconducting gaps in this interesting quasi-two-dimensional superconductor with Berezinsky–Kosterlitz–Thouless topological transition. 相似文献
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The subsolidus phase relationships of the system TiO2-NiO-WO3 were investigated, aiming at exploring new potential visible-light active photocatalysis systems. After the solid-state chemistry reaction in air between 1000 and 1150 ℃, X-ray diffraction(XRD) data showed that two binary compounds and three ternary-phase regions were contained in this ternary system. No new ternary compound was discovered under our experiment conditions. None of these phases in this system revealed a remarkable homogeneity range. 相似文献
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Multiband nodeless superconductivity near the charge-density-wave quantum critical point in ZrTe_(3-x)Se_x
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It was found that selenium doping can suppress the charge-density-wave(CDW) order and induce bulk superconductivity in ZrTe_3. The observed superconducting dome suggests the existence of a CDW quantum critical point(QCP) in ZrTe_3-xSex near x ≈ 0.04. To elucidate the superconducting state near the CDW QCP, we measure the thermal conductivity of two ZrTe_(3-x)Se_x single crystals(x = 0.044 and 0.051) down to 80 m K. For both samples, the residual linear term κ_0/T at zero field is negligible, which is a clear evidence for nodeless superconducting gap. Furthermore, the field dependence of κ_0/T manifests a multigap behavior. These results demonstrate multiple nodeless superconducting gaps in ZrTe_(3-x)Se_x,which indicates conventional superconductivity despite of the existence of a CDW QCP. 相似文献
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