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1)  periodic torque ripple
周期性转矩扰动
2)  periodic disturbance
周期性扰动
1.
Influence of periodic disturbance on statistic character of turbulent boundary layer;
周期性扰动对平板湍流边界层统计性质的影响
2.
Artificial periodic disturbances are introduced to the outer field of turbulent boundary layer in an open circular style water channel.
在开口式循环水槽底部湍流边界层外区中引入周期性扰动 ,利用 X型热膜探针对下游扰动进行测量 。
3.
To restrain the influence of the displacement-dependent periodic disturbances,a pseudo derivative feedback with feed-for-ward (PDFF) speed controller and a modified displacement repetitive controller were designed.
为了抑制周期性扰动的影响,设计了伪微分前馈反馈(PDFF)速度控制器和改进型位移重复控制器,并针对时变周期输入信号的跟踪问题,利用Lebesgue平方可积空间转换原理,将t-域时变周期的位移信号转换为θ-域固定周期的位移信号,以实现对时变周期输入信号的精确跟踪。
3)  disturbed periodicity
扰动周期性
4)  periodic disturbances
周期性扰动
1.
To weaken the influences of the position-dependent periodic disturbances and parameter uncertainties, the robust repetitive controller was designed, which associated structure singular value theory (μ theory) with the discrete-time repetitive control theory.
为了削弱周期性扰动及参数变化不确定性的影响,将重复控制和结构奇异值理论(μ理论)相结合,利用线性分式变换(linear fractional transformation,LFT)将鲁棒重复控制问题转换成H∞最优控制问题,采用D-K迭代法设计鲁棒重复控制器(robust repetitive controller,RRC),实现系统的稳定性和鲁棒性,提高系统的跟踪特性。
2.
To weaken the influences of the position-dependent periodic disturbances,the controller was designed to reject the periodic disturbances and track the desired periodic input,which associated PDFF(Pseudo derivative feedback with feed-forward) control on the velocity loop with the modified repetitive control on the position loop.
为了削弱周期性扰动的影响,设计了PDFF(伪微分前馈反馈控制)速度控制器和改进型位移重复控制器来抑制周期性扰动的影响,以实现周期性输入信号的精确跟踪。
5)  periodic blow-suction disturbance
周期性吹吸扰动
1.
The velocity time sequence at different vertical and longitudinal locations in a turbulent boundary layer with periodic blow-suction disturbance is finely measured by IFA-300 constant-temperature anemometer with resolution higher than the frequency that corresponds to Kolmogorov dissipative scale.
用IFA-300热线风速仪以高于对应最小湍流时间尺度的分辨率,精细测量了风洞中施加局部周期性吹吸扰动平板湍流边界层近壁区域不同法向和流向位置的瞬时速度的时间序列信号。
2.
In this paper, the technique of constant temperature anemometry, together with double-hot-wire-sensor probe, is used to carry out experimental study on the turbulent boundary layer, which is controlled by periodic blow-suction disturbance in the low turbulent level wind channel.
本文应用热线测速技术,对风洞中平板湍流边界层壁面施加周期性吹吸扰动进行了试验研究。
6)  periodic disturbances rejection
周期性扰动抑制
补充资料:周期性


周期性
periodicity

  ①事物反复有规律的变化,每一次变化称为一个周期。如生理状态下的心动周期、呼吸周期、月经周期等。②疾病过程中临床症状多次重复出现的规律性。如周期热、溃疡病周期性上腹部疼痛等。
  
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