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Fuzzy sliding mode control guidance law with terminal impact angle and acceleration constraints 被引量:6
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作者 qingchun li Wensheng Zhang +1 位作者 Gang Han Yuan Xie 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第3期664-679,共16页
In this paper, a novel fuzzy sliding mode control(FSMC) guidance law with terminal constraints of miss distance, impact angle and acceleration is presented for a constant speed missile against the stationary or slow... In this paper, a novel fuzzy sliding mode control(FSMC) guidance law with terminal constraints of miss distance, impact angle and acceleration is presented for a constant speed missile against the stationary or slowly moving target. The proposed guidance law combines the sliding mode control algorithm with a fuzzy logic control scheme for the lag-free system and the first-order lag system. Through using Lyapunov stability theory, we prove the sliding surface converges to zero in finite time. Furthermore, considering the uncertain information and system disturbances, the guidance gains are on-line optimized by fuzzy logic technique. Numerical simulations are performed to demonstrate the performance of the FSMC guidance law and the results illustrate the validity and effectiveness of the proposed guidance law. 展开更多
关键词 guidance law sliding mode control fuzzy logic impact angle
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不同品系杜洛克后代商品猪胴体性状的比较分析
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作者 陈鑫 田琛 +8 位作者 姬应来 王建朋 孙晓梅 孙义姗 高若男 和军飞 李清春 卢世豪 黄涛 《猪业科学》 2021年第4期110-112,共3页
为研究不同品系杜洛克作为终端父本对其后代商品猪胴体性状的影响,选取214和108头分别由美系和加系杜洛克公猪配种、出生时间相近(±2 d)和体重相近(35±5 kg)的后代三元商品猪进行育肥饲养,结束饲养后开展屠宰试验,测定背膘厚... 为研究不同品系杜洛克作为终端父本对其后代商品猪胴体性状的影响,选取214和108头分别由美系和加系杜洛克公猪配种、出生时间相近(±2 d)和体重相近(35±5 kg)的后代三元商品猪进行育肥饲养,结束饲养后开展屠宰试验,测定背膘厚度、眼肌厚度、瘦肉率和肋骨数。结果显示:加系杜洛克商品后代的背膘厚度、眼肌厚度显著(P<0.05)高于美系杜洛克后代商品猪;加系杜洛克后代商品猪的瘦肉率、肋骨数显著(P<0.05)低于美系杜洛克。同一品系不同性别间背膘厚度、眼肌厚度、瘦肉率均不显著(P>0.05),加系商品公猪肋骨数极显著低于母猪肋骨数(P<0.01)。结论:美系杜洛克后代商品猪的胴体性状优于加系杜洛克后代商品猪。 展开更多
关键词 杜洛克 品系 肋骨数 胴体性状
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