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The modelling, simulation and experimental testing of the dynamic responses of an elevator system

机译：电梯系统动力响应的建模，仿真和实验测试

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Vertical vibrations affect passenger comfort during an elevator travel. This work presents the results of a study of vertical vibrations caused by torque ripple generated at the elevator drive system. Tests are performed on a 1:1 roping configuration laboratory model; the acceleration response at the suspended masses and at the drive machine, the machine shaft velocity and the three phase current intensities supplied to the machine are measured during several travels. The machine torque is estimated from the current intensities. A non-stationary model of an elevator is then developed to simulate the acceleration response. The model accommodates the drive system dynamics. The machine parameters are computed by means of the Finite Element Method simulation software FLUX. FLUX computes the amplitudes of the torque ripple and the radial forces at the air-gap. As the torque ripple computed by FLUX is smaller than that torque estimated from the machine currents, the latter is added as a perturbation to the controller generated torque. With respect to the car-counterweight-sheave-ropes assembly a five degree-of-freedom lumped-parameter model (LPM) and a novel distributed-parameter one (DPM) are developed. The elevator dynamics represented by the DPM is described by a partial differential equation set that is discretised by expanding the vertical displacements in terms of the linear stationary mode shapes of a system composed of three masses constrained by the suspension rope. The models are implemented in the MATLAB/Simulink computational environment and the system response is determined through numerical simulation. It is shown that the LPM forms a good approximation of the DPM. The frequency content of the computed and measured accelerations demonstrates that the elevator car vibrates at frequencies generated at the machine, especially when they are close to the system natural frequencies.
机译：垂直振动会影响电梯运行过程中的乘客舒适度。这项工作提出了研究由电梯驱动系统产生的转矩脉动引起的垂直振动的结果。测试是在1：1绳索配置实验室模型上进行的；在几次行程中，测量悬挂质量和驱动机器上的加速度响应，机器轴速度和提供给机器的三相电流强度。电机扭矩是根据电流强度估算的。然后，开发电梯的非平稳模型来模拟加速度响应。该模型可适应驱动系统的动态变化。机器参数通过有限元方法仿真软件FLUX进行计算。 FLUX计算气隙处的转矩脉动和径向力的幅度。由于由FLUX计算出的转矩脉动小于根据电机电流估算出的转矩脉动，因此将电机电流作为扰动添加到控制器产生的转矩中。针对汽车配重滑轮组件，开发了五自由度集总参数模型（LPM）和新型分布参数一（DPM）。 DPM代表的电梯动力学由一个偏微分方程组描述，该偏微分方程组通过根据由悬索约束的三个质量组成的系统的线性固定模态形状扩展垂直位移来离散化。这些模型是在MATLAB / Simulink计算环境中实现的，并且系统响应是通过数值模拟确定的。结果表明，LPM很好地逼近了DPM。计算出的加速度和测量出的加速度的频率成分表明，电梯轿厢以机器产生的频率振动，尤其是当它们接近系统固有频率时。

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