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平面内直线度误差最小区域法的完备性研究 被引量:11
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作者 张新宝 张坤 《机械工程学报》 EI CAS CSCD 北大核心 2012年第24期14-18,共5页
针对国家标准GB/T 11336-2004中用于平面内直线度误差最小包容区域评定的极点计算法对有些数据的处理结果不符合最小包容区域的高-低-高或低-高-低原则,即存在不完备性,因此提出定向极点搜索与迭代的评定方法。理论分析和平面内直线度... 针对国家标准GB/T 11336-2004中用于平面内直线度误差最小包容区域评定的极点计算法对有些数据的处理结果不符合最小包容区域的高-低-高或低-高-低原则,即存在不完备性,因此提出定向极点搜索与迭代的评定方法。理论分析和平面内直线度误差数据的处理实例证明本方法完全符合平面内直线度误差评定的最小包容区域的高-低-高或低-高-低原则。数据处理的结果还进一步显示新方法完备性好,评定结果精准、可靠,计算过程绝对收敛、速度也更快,可以克服国家标准GB/T11336-2004中平面内直线度误差评估的极点计算法存在的缺陷。 展开更多
关键词 直线度误差 最小包容区域 极点计算法 定向搜索 迭代
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Improved Consensus Speed for Discrete-Time Multi-agent Systems
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《Journal of Donghua University(English Edition)》 EI CAS 2013年第6期461-465,共5页
The consensus problem of a linear discrete-time multi- agent system with directed communication topologies was investigated. A protocol was designed to solve consensus with an improved convergence speed achieved by de... The consensus problem of a linear discrete-time multi- agent system with directed communication topologies was investigated. A protocol was designed to solve consensus with an improved convergence speed achieved by designing protocol gains. The clo6ed-loop multi.agent system converged to an expected type of consensus function, which was divided into four types: zero, non- zero constant vector, bounded trajectories, and ramp trajectories. An algorithm was further provided to construct the protocol gains, which were determined in terms of a classical pole placement algorithm and a modified algebraic Riccati equation. Finally, an example to illustrate the effectiveness of theoretical results was presented. 展开更多
关键词 discrete-time multi-agent consensus function consensus speed
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