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提出了一种高精度的对准偏差算法-双池算法。根据这种算法,将暗场对准系统中扫描采集的光电对准信号,通过求出整个扫描曲线的对称点以代替传统的极值点或阈值点,使重复对准精度达0.11μm(3σ)。文中对双池算法的原理、特点及数学表达式进行了详细的论述,并给出了实验结果。 相似文献
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WANG Ji-Ke MAO Ze-Pu BIAN Jian-Ming CAO Guo-Fu CAO Xue-Xiang CHEN Shen-Jian DENG Zi-Yan FU Cheng-Dong GAO Yuan-Ning HE Kang-Lin HE Miao HUA Chun-Fei HUANG Bin HUANG Xing-Tao JI Xiao-Bin LI Fei LI Hai-Bo LI Wei-Dong LIANG Yu-Tie LIU Chun-Xiu LIU Huai-Min LIU Suo LIU Ying-Jie MA Qiu-Mei MA Xiang MAO Ya-Jun MO Xiao-Hu PAN Ming-Hua PANG Cai-Ying PING Rong-Gang QIN Ya-Hong QIU Jin-Fa SUN Sheng-Sen SUN Yong-Zhao WANG Liang-Liang WEN Shuo-Pin WU Ling-Hui XIE Yu-Guang XU Min YAN Liang YOU Zheng-Yun YUAN Chang-Zheng YUAN Ye ZHANG Bing-Yun ZHANG Chang-Chun ZHANG Jian-Yong ZHANG Xue-Yao ZHANG Yao ZHENG Yang-Heng ZHU Ke-Jun ZHU Yong-Sheng ZHU Zhi-Li ZOU Jia-Heng 《中国物理C(英文版)》2009,33(3)
Software alignment is quite important for a tracking detector to reach its ultimate position accuracy and momentum resolution. We developed a new alignment algorithm for the BESⅢ Main Drift Chamber using the Kalman Filter method. Two different types of data which are helix tracks and straight tracks are used to test this algorithm, and the results show that the design and implementation is successful. 相似文献
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LIANG Yu-Tie MAO Ya-Jun YOU Zheng-Yun LI Wei-Dong BIAN Jian-Ming CAO Guo-Fu CAO Xue-Xiang CHEN Shen-Jian DENG Zi-Yan FU Cheng-Dong GAO Yuan-Ning HAN Lei HAN Shao-Qing HE Kang-Lin HE Miao HU Ji-Feng HU Xiao-Wei HUANG Bin HUANG Xing-Tao JIA Lu-Kui JI Xiao-Bin LI Hai-Bo LIU Bei-Jiang LIU Chun-Xiu LIU Huai-Min LIU Ying LIU Yong LUO Tao LU Qi-Wen MA Qiu-Mei MA Xiang MAO Ze-Pu MO Xiao-Hu NING Fei-Peng PING aong-Gang QIU Jin-Fa SONG Wen-Bo SUN Sheng-Sen SUN Xiao-Dong SUN Yong-Zhao TIAN Hao-Lai WANG Ji-Ke WANG Liang-Liang WEN Shuo-Pin WU Ling-Hui WV Zhi XIE Yu-Guang XU Min YAN Jie YAN Liang YAO Jian YUAN Chang-Zheng YUAN Ye ZHANG Chang-Chun ZHANG Jian-Yong ZHANG Lei ZHANG Xue-Yao ZHANG Yao ZHENG Yang-Heng ZHU Yong-Sheng ZOU Jia-Heng 《中国物理C(英文版)》2009,33(7)
Cosmic-ray data of 90 M events have been collected and used for calibration, alignment as well as detector tuning. A special tracking algorithm for the BESⅢ muon counter is developed and verified with Monte-Carlo simulation and then further confirmed with the cosmic-ray data. The obtained strip resolutions are in good agreement with the design values. A new alignment approach for the BESⅢ muon counter is confirmed with the cosmic-ray data and proposed to be used in future analysis of experimental data. 相似文献
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A simple technique for the alignment of a ring resonator is presented. The positional and the directional alignments are obtained by the movements of independent mirrors. The effects of alignment inaccuracies on the performance of a ring resonator are discussed. 相似文献
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本文简单介绍了用于中国2.16米天文望远镜折轴焦点的阶梯光栅分光仪的总体方案,分析了其光学系统的装调要点与步骤,并制订切实可行的装调方案。用最少的辅助工具完成了复杂的光学装调任务。 相似文献
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介绍卡塞格林系统非球面主镜使用三坐标测量仪进行定心装调的方案。系统的主镜口径为300 mm,需要使用结构胶进行胶结固定,选用微应力粘接方法,将胶层粘接应力与热应力变形控制在极小的范围内。利用ZYGO干涉仪获得光学系统的波前信息,将测得的波相差转化为初级像差,根据光学系统失调量与像差的关系对卡塞格林系统进行计算机辅助装调。调试后,系统的RMS值达到0.10,分辨率达到1以内,检测结果表明:该系统的成像质量接近理论衍射分辨率,该方案可以实现快速定心,并且能够满足计算机辅助装调对定心精度的要求。 相似文献
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The dynamic alignment and post-ionization alignment of nitrogen molecules are investigated while considering the effect of tunneling ionization. The effects of tunneling ionization on the angular distribution are calculated when the molecules are irradiated by different laser intensities. The results show that laser intensity directly affects the time and extent of dynamic alignment. Furthermore, the extent of post-ionization alignment is not only determined by laser intensity but also affected by the final extent of dynamic alignment. The post-ionization alignment will dominate during the process of molecular (or molecular ion) rotational alignment for femtosecond laser pulse. The time of tunneling ionization is a significant factor to the final ensemble angular distribution of molecular ions when laser intensity is low. 相似文献
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K.Hara 《中国物理C(英文版)》2010,34(9)
As early physics programs with the ATLAS detector,we present J/ψ and Υ production cross section and spin alignment measurements,and the strategy for the jet energy calibration. 相似文献
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离轴三镜系统计算机辅助装调方法研究 总被引:2,自引:0,他引:2
针对离轴三镜系统光学元件各调整变量之间的关系,提出了一种求解失调量的方法。从分析调整变量之间的关系入手,采用求条件数的方法来判断变量之间的相关程度,去除相关的变量,从而确定出系统的待调整量。计算机模拟表明,只需进行一次迭代求解出的系统待调整量即可满足装调精度要求,调整后整个系统波像差的均方根值(RMS)与理想状态之差小于0.02λ。这种方法是用所确定的调整变量的变化补偿其它相关变量的失调,不仅结果准确、收敛速度快,而且需要调整的自由变量少,大大缩短了装调周期。 相似文献
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给出计算机辅助装调中失调量与像差关系的数学模型,利用Zemax对折轴三反射光学系统进行失调仿真,得到失调数据,再对数据进行分析和处理,求得次镜和三镜的灵敏度矩阵,还对各种初级像差与各装调参量之间的对应关系及该系统的失调特性进行讨论。根据以上分析结果,最终确定了共轴三反射光学系统的装调方案。为了验证方案的可行性,在Zemax中对共轴三反射光学系统人为地加入不同的失调量后,按照确定的装调方案,利用建立的计算机辅助装调数学模型计算出失调量的大小和方向,再根据计算结果对共轴三反射光学系统进行调整,仿真结果和实际装调结果都证明该方案是可行的。 相似文献
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王纪科 毛泽普 边渐鸣 曹国富 曹学香 陈申见 邓子艳 傅成栋 高原宁 何康林 何苗 花春飞 黄彬 黄性涛 季晓斌 李飞 李海波 李卫东 梁羽铁 刘春秀 刘怀民 刘锁 刘英杰 马秋梅 马想 冒亚军 莫晓虎 潘明华 庞彩莹 平荣刚 秦亚红 邱进发 孙胜森 孙永昭 王亮亮 文硕频 伍灵慧 谢宇广 徐敏 严亮 尤郑昀 苑长征 袁野 张炳云 张长春 张建勇 张学尧 张瑶 郑阳恒 朱科军 朱永生 朱志丽 邹佳恒 《中国物理 C》2009,33(3):210-216
Software alignment is quite important for a tracking detector to reach its ultimate position accuracy and momentum resolution. We developed a new alignment algorithm for the BESⅢ Main Drift Chamber using the Kalman Filter method. Two different types of data which are helix tracks and straight tracks are used to test this algorithm, and the results show that the design and implementation is successful. 相似文献
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The two-dimensional automatic alignment system with an optical aperture is developed. The optical aperture with four integrated photodiode cells for feedback control signal is fabricated by MEMS techniques. The translation stage of the system is driven by four shape-memory-alloy positioning actuators to realize two-dimensional (XY-plane) movement. 相似文献
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A novel rapid transfer alignment algorithm for laser strapdown inertial navigation system (SINS) is studied. Transfer alignment have typically relied on velocity measurements from the master SINS as the source of alignment information, but lever arm error must be compensated accurately while velocity information is utilized, all most every quaternion based error model is nonlinear, so nonlinear filtering algorithms are need, suffering from computational complex and large error. Aim at these problems, a novel improved rapid transfer alignment algorithm formulation is presented, applying quaternion to built the process and measurement models, the improvement employs a special manipulation of the measurement equation results in a linear pseudo-measurement equation, thus the classical linear Kalman filter is employed to estimate the state, need not lever arm error compensation, results in the reduce of computational burden. Observability analysis of this new transfer alignment algorithm has been done based on the piece-wise constant system (PWCS) method, results show that the presented algorithm can accomplish the initial alignment task perfectly. A transfer alignment simulation system is also developed for the evaluation and analysis of the presented algorithm, simulation results are confirmed with the theoretical conclusion, which can achieve the transfer alignment accuracy about 1 mrad within 10 s. 相似文献
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There is general agreement that postural alignment is important in optimizing voice function. A number of articles have illuminated the way in which posture, particularly of the cervical spine, is directly related to vocal resonance and pitch control. Despite frequent involvement in muscle training, few speech pathologists have the background in exercise physiology necessary to appreciate the contribution of muscular length-tension relationships to postural alignment. The purpose of this article is to provide voice therapists with information to help them formulate appropriate recommendations for improving postural alignment. This article synthesizes information from the literature regarding the role of muscular length-tension balance in the attainment and maintenance of postural alignment. Important considerations in the assessment of muscle tension and weakness are presented along with advice regarding application to the treatment of voice-disordered patients. Concepts detailed include agonist/antagonist relationships, the biomechanics of stretching, postural assessment, and the relationship between muscle tension and muscle weakness. The role of both stretching and strength-based training is discussed. Specific exercises with emphasis on altering the alignment of the cervical and thoracic spine are presented with suggestions for their use in the clinic. There is growing understanding of the physiology behind recommendations of voice teachers and therapists to maintain optimal alignment. To effectively mediate postural misalignment, clinicians must have knowledge of the length-tension relationships between muscles. This understanding will lead to better interventions for postural alignment. 相似文献