磁浮轨检车随机振动时域仿真

Time domain simulation of stochastic vibration for maglev track inspection vehicle

为了研究在动态测量过程中磁浮轨检车的随机振动对测量磁浮轨道几何参数精度和测量速度的影响,根据这一特殊车辆的结构特点和运动原理建立了整车振动五自由度模型.由于磁浮轨道不平度与高等级机场路面的相似性,采用了滤波白噪声作为轨道随机不平度输入.在MATLAB/SIMULINK环境中仿真了在磁浮轨道随机路面激励下车辆的时域动态响应,分析了车辆随机振动对采用激光三角法测量位移的精度影响.仿真结果表明车速10 km/h时的测量精度满足实测时所要求的0.1 mm.

A five-degree freedom vibration model of maglev track inspection vehicle was proposed based on the construction characteristics and the principle of motions of this special vehicle for studying how the vehicle stochastic vibration affects the measuring accuracy and measuring speed. Because the stochastic characteristics of the track surface unevenness are identical with those of roads of higher grades like aerodrome, white noise filtration is treated as the input of the vehicle dynamic system and the time dynamic responses of the vehicle are simulated by MATLAB/SIMULINK. The vibration effects on the displacement measuring accuracy by laser triangle method are analyzed. Simulation results indicate that measuring accuracy with the vehicle speed 10 km/h meets the measuring ,accuracy of 0.1 mm as required.