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落地缓冲过程中下肢的神经控制特性
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作者 赵权 《西安工业大学学报》 CAS 2010年第4期406-408,共3页
针对运动过程中,缓冲的效果取决于下肢的工作特性问题,分析了下肢在落地缓冲过程中的力学性能的神经控制特性、下肢结构的动力传递特性、肌肉工作特性、缓冲频率响应特性,分析了下肢力学结构描述参数(响应时间、相移、关节曲屈角度)... 针对运动过程中,缓冲的效果取决于下肢的工作特性问题,分析了下肢在落地缓冲过程中的力学性能的神经控制特性、下肢结构的动力传递特性、肌肉工作特性、缓冲频率响应特性,分析了下肢力学结构描述参数(响应时间、相移、关节曲屈角度)神经刺激大小关系.通过对测试对象落地缓冲过程中下肢力学性能的神经控制特性进行实验,采用手工起点和计算机插值结合的方法对测试数据进行分析.实验结果表明,测试对象在落地缓冲过程中下肢随着刺激强度增加,缓冲冲量动量比函数趋于常数,后冲冲量动量比函数开始减小。缓冲的谐振峰一般出现于100 Hz以上. 展开更多
关键词 神经控制特性 力学性能 落地缓冲 下肢
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NEURAL NETWORK REALIZATION OF STRUCTURAL VIBRATION CONTROL USING MR DAMPER
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作者 周丽 张志成 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2001年第2期144-150,共7页
Magnetorheological (MR) dampers are one of the most promising new devices for civil infrastructural vibration control applications. However, due to their highly nonlinear dynamic behavior, it is very difficult to obta... Magnetorheological (MR) dampers are one of the most promising new devices for civil infrastructural vibration control applications. However, due to their highly nonlinear dynamic behavior, it is very difficult to obtain of a mathematical model of inverse MR damper that has an explicit relationship between the desired damper force and the command signal (voltage). This force voltage relationship is especially required for the structural vibration control design and simulation using MR dampers. This paper focuses on using a neural network (NN) technique to emulate the inverse MR damper model. The output of the neural network can be used to command the MR damper for generating desired forces. Numerical simulations are also presented to illustrate the effectiveness of this inverse model in semi active vibration control using MR dampers. 展开更多
关键词 magnetorhelogical damper neural networks optimal control inverse dynamics
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