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Ahut-Delta并联机构改进混沌粒子群算法尺度综合 总被引:2,自引:0,他引:2
针对Ahut-Delta并联机构,提出了一种基于改进混沌粒子群算法的尺度综合方法。首先提出一种改进混沌粒子群算法,即采用混沌立方映射初始化种群,并根据迭代状态指数性调整惯性权重因子,同时进行早熟判断和混沌扰动,迭代获得最优粒子。其次将Ahut-Delta并联机构优化参数转变为粒子维度决策变量,雅可比矩阵的全域均值条件数和全域波动量构建的全域综合性能评价指标在其几何条件约束、传动角约束条件下转换为改进混沌粒子群算法的适应度函数。最终通过改进混沌粒子群算法优化搜索,优化出适应度函数值最小的最优粒子,从而获得Ahut-Delta并联机构在全域运动性能最佳的尺度参数。仿真分析结果表明,所提尺度综合方法具有正确性和有效性。 相似文献
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A method of detecting the signal frequency which is disturbed by the noise based on the autonomous chaotic system is proposed. A signal with noise was added to an autonomous chaotic system, and then a negative feedback was imposed to it. The feedback gain was appropriately adjusted, so as to let the noisy system orbit be a limit cycle. The number of times that the orbit went directly through a plane was calculated by loop phase technology, and the vibration frequency was found according to it. The frequency of system is determined by the frequency of the test signal, yet free from noise, so the frequency of the test signal is the vibration frequency of the system. Simulation results further demonstrate the effectiveness of the method. 相似文献
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为研究水稻不同种植模式对稻瘟病发生影响,通过试验设计、采样设计,以稻瘟病病原菌为研究对象。通过定时捕捉稻瘟病病原菌孢子,并与温度、光照强度、相对湿度、不同试验区间进行研究分析。试验结果表明:孢子量变化与温度、光照强度和相对湿度呈正相关;同一种植模式及布局接壤的试验区孢子量变化间呈显著正相关;研究还发现多样性种植的试验区孢子总量略低于单一种植的试验区孢子总量,说明多样性种植能较好地抑制稻瘟病的发生。同时,利用分形理论研究了整个试验区的分形维,研究表明:分形维为小数,说明整个试验区具有一定的混沌特性。 相似文献
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In this paper,the static stable process of one machine to infinite bus power system under small disturbance was analysed. Based on the related nonlinear swing equations, modern dynamic system theory was applied to the analysis of this static stable proces 相似文献