| 引用本文: | 陈梁栋，陈文峰，吕明久，杨军，尹维帅. WLFMCW雷达旋翼转速快速估计方法[J]. 雷达科学与技术, 2018, 16(2): 187-196.[点击复制] |
| CHEN Liangdong, CHEN Wenfeng, LYU Mingjiu, YANG Jun, YIN Weishuai. Fast Estimation of Rotor Speed Based on WLFMCW[J]. Radar Science and Technology, 2018, 16(2): 187-196.[点击复制] |
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| 摘要: |
| 针对用于脉冲体制雷达的旋翼转速估计方法不能完全应用至宽带线性调频连续波(WLFMCW)的问题，提出了一种基于WLFMCW的直升机旋翼转速快速估计方法。首先，建立了WLFMCW旋翼目标回波模型，并对回波特点进行了分析。然后，在微动特征骨架曲线上通过搜索相邻峰值的相位差来计算图像周期。最后，基于图像最小熵原理，对旋翼叶片搜索成像并估计出旋翼叶片个数，通过图像周期、旋翼叶片个数、旋翼转速三者的关系估计出旋翼转速。仿真结果验证了所提方法的可行性和有效性。 |
| 关键词: 线性调频 连续波雷达 微动 转速估计 旋翼成像 |
| DOI：10.3969/j.issn.1672-2337.2018.02.012 |
| 分类号:TN958.95 |
| 基金项目:国家自然科学基金(No.61671469) |
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| Fast Estimation of Rotor Speed Based on WLFMCW |
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CHEN Liangdong, CHEN Wenfeng, LYU Mingjiu, YANG Jun, YIN Weishuai
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1.Air Force Early Warning Academy, Wuhan 430019, China;2.Unit 93986 of PLA, Hetian 848000, China
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| Abstract: |
| The rotor speed estimation methods which are used for pulse radar cannot be fully applied to wideband linear frequency modulation continuous wave (WLFMCW) radar. For this problem, this paper puts forward a fast method to estimate helicopter rotor speed based on WLFMCW radar. Firstly, the rotor target model is constructed and the echo characteristics of WLFMCW radar are analyzed. Secondly, the image cycle is calculated by searching the adjacent phase difference based on the micro-motion characteristic skeleton curves. Finally, the number of blades is estimated based on the minimum entropy. The rotor speed can be estimated through the relationship among image cycle, blade number, and rotor speed. The simulation results verify the feasibility and effectiveness of the proposed method. |
| Key words: linear frequency modulation continuous wave radar micro motion rotation speed estimation rotor imaging |
