摘要
针对空气悬架系统主动控制中神经辨识器的离线训练问题,利用BP神经网络实现从空气悬架系统非簧载质量振动加速度空间到其动态载荷空间的映射。建立带有空气悬架系统的1/4工程车辆动态模型,通过仿真得出了工程车辆空气悬架系统的非簧载质量振动加速度和动态载荷数据,以空气悬架系统的非簧载质量振动加速度数据作为神经网络的输入,动态载荷数据作为神经网络的输出,训练BP神经网络,并对训练好的BP神经网络进行泛化能力的测试,路面输入采用幅值为0.01m,频率为1rad/s正弦波时,识别误差率在30%以内的点占总数的82.95%;以幅值为0.02m,频率为2rad/s的正弦波作为系统的路面输入,识别误差率在30%以内的点占总数的77.94%。结果表明BP神经网络能够对不同的路面输入具有较好的适应性。
Based on training neuroidentifier in off-line way in active control of air suspension system,BP artificial neural network was applied in the research of identifying dynamic load of air suspension system by vibrant acceleration of under spring mass. A dynamic model of 1/4 engineering vehicle with air suspension system was built. Vibrant acceleration data of under spring mass and dynamic load data of engineering vehicle were acquired by simulation. Vibrant acceleration data of under spring mass were input data of BP neural network,dynamic load data were output data of BP neural network. BP neural network was trained by input and output data of air suspension system. Generalized ability of trained BP neural network was tested. Road input was sine wave that its amplitude was 0.01 m and its frequency was 1 rad/s. The percentage was 82.95% that the ratio of failure identifying points to total points less than 30%. Road input was sine wave that its amplitude was 0.02 m and its frequency was 2 rad/s. The percentage was 77.94% that the ratio of failure identifying points to total points less than 30%. The result indicates that BP neural network can adapt different road inputs.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第3期130-134,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
安徽省高校青年教师资助计划项目(2008jq1144)
关键词
动态载荷
神经网络
信号分析
空气悬架
dynamic loads
neural networks
signal analysis
air suspensions
