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Closed-loop online harmonic vibration estimation in DC electric motor systems

机译:直流电动机系统闭环在线谐波振动估计

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摘要

In this article, an active vibration control technique for direct-current electric motors subjected to harmonic mechanical load torque is introduced. Formulae to compute uncertain parameters of amplitude, frequency and phase angle of harmonic torque disturbances for angular velocity reference trajectory tracking are proposed. Vibrating torque disturbances are actively suppressed by the control voltage input. Mathematical modelling based on vibrating systems is adopted for purposes of online parameter estimation of oscillating signals. In this fashion, accurate estimation can be performed using measurements of the output signal only. Online parameter estimation is extended for a class of controllable dynamical engineering systems subjected to harmonic disturbances. Formulae for closed-loop online parameter estimation of harmonic vibrations on differentially flat linear dynamical systems of n degrees of freedom for efficient tracking of desired time-varying motion reference profiles are then presented. Analytical and numerical results prove that proposed formulae can be used to accurately determine the parameters of unknown harmonic vibrations, which is an excellent feature for high-efficiency active vibration control strategies.
机译:在本文中,引入了对经过谐波机械负载扭矩的直流电动机的主动振动控制技术。提出了计算角速度参考轨迹跟踪的幅度,谐波扭矩干扰幅度的不确定参数的公式。通过控制电压输入主动地抑制振动扭矩扰动。采用了基于振动系统的数学建模,用于振荡信号的在线参数估计。以这种方式,可以使用仅输出信号的测量来执行精确的估计。为一类经过谐波干扰的一类可控动态工程系统扩展了在线参数估计。然后呈现用于有效跟踪所需的时变运动参考曲线的N级自由度的差平线性动力系统的闭环在线参数估计的公式。分析和数值结果证明,所提出的公式可用于精确地确定未知谐波振动的参数,这是高效率主动振动控制策略的优异特征。

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