4篇
您的检索式：作者名="Yang Haima"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Self-Collimation for Two-Dimensional Micro-Angle Measurement in Space显示文摘How to measure the two-dimensional attitude angle of space target and achieve stable tracking and aiming has become an important problem. The self-collimation is often measured via one-dimensional motion of the object in space. This paper proposes a micro-angle measurement system based on self-collimation to obtain the two-dimensional angle information of moving objects in space, and a thrice reflecting optical path structure is built to improve the compactness of the system. First, by establishing a posture angle measurement and decomposition model, the two-dimensional deflection angle value of the reflecting mirror is derived from the rotation angle equation;Second, the self-collimating measurement process is simulated to show the relationship between the reflecting mirror rotation angle and the imaging spot distortion of detector;Third, a two-dimensional micro-angle experimental platform is established based on the Position Sensitive Detector(PSD). Finally, nonlinear error of PSD is improved by the cubic spline interpolation method. The case results show a 15% reduction in the angle error. | REN Wenjia LIU Jin YANG Haima HUANG Bo JIAN Yumei | 2021 | Wuhan University Journal of Natural Sciences2021，26，2： | 1 |
| 2 | Rail Flatness and Verticality Measurement System Based on Ruler Model显示文摘Currently,the manual contact rail measurement that was basically adopted in China has low detection efficiency,poor accuracy and poor stability.In order to improve the function of the system,we propose a non-contact measurement method based on the flatness and verticality ruler model.The flatness measurement model was built by employing the string measurement method.In addition,the verticality measurement model was built by the dihedral method to measure the rail comprehensively.By extracting curvature information of feature points,in this system,each laser sensor is used to collect rail profile curves.A large number of three-dimensional point clouds data are generated by the unit quaternion method of coordinate transformation,and the contour curves of the characteristic points of the four laser sensors are matched with the corresponding point sets one to one,and the rail contour splicing is finally completed.The experimental results show that this method has better measurement effect compared with the traditional manual measurement method. | YANG Haima ZOU Xinglin ZHOU Zhendong ZHANG Dawei YANG Yutuan LI Jun QIAN Longping JIANG Shenghua | 2020 | Wuhan University Journal of Natural Sciences2020，25，6： | 0 |
| 3 | An all optical fiber gas sensor of NH3 and CO based on based on the spectral absorption and harmonic detection显示文摘 | Liu Jin Yang Haima Yan Chaochao Song Wanqing | 2014 | International English Education Research2014，，12： | 0 |
| 4 | Harris Hawks Algorithm Incorporating Tuna Swarm Algorithm and Differential Variance Strategy显示文摘Because of the low convergence accuracy of the basic Harris Hawks algorithm,which quickly falls into the local optimal,a Harris Hawks algorithm combining tuna swarm algorithm and differential mutation strategy(TDHHO)is proposed.The escape energy factor of nonlinear periodic energy decline balances the ability of global exploration and regional development.The parabolic foraging approach of the tuna swarm algorithm is introduced to enhance the global exploration ability of the algorithm and accelerate the convergence speed.The difference variation strategy is used to mutate the individual position and calculate the fitness,and the fitness of the original individual position is compared.The greedy technique is used to select the one with better fitness of the objective function,which increases the diversity of the population and improves the possibility of the algorithm jumping out of the local extreme value.The test function tests the TDHHO algorithm,and compared with other optimization algorithms,the experimental results show that the convergence speed and optimization accuracy of the improved Harris Hawks are improved.Finally,the enhanced Harris Hawks algorithm is applied to engineering optimization and wireless sensor networks(WSN)coverage optimization problems,and the feasibility of the TDHHO algorithm in practical application is further verified. | XU Xiaohan YANG Haima ZHENG Heqing LI Jun LIU Jin ZHANG Dawei HUANG Hongxin | 2023 | Wuhan University Journal of Natural Sciences2023，28，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员