However, due to poor working conditions for mine belt conveyor, the uneven load distribution, load fluctuation features, it has its particularity in the process of using and maintenance. 但由于矿用带式输送机工作环境恶劣,载荷分布不均、载荷波动大等特点,所以在使用维护方面又具有其特殊性。
Mixing ventilation is widely used in the traditional catering kitchen, resulting in the serious pollution in cooking fumes, high temperature, unreasonable airflow and high load fluctuation. 传统饮食业厨房采用混合通风技术,存在室内油烟污染严重、室内温度高、气流组织不合理、负荷波动大的特点。
In changeful wind conditions and load fluctuation maximizes the stability of shaft output. 在风力和负载变化的情况下,能最大限度保持机械轴的输出稳定性。
On the basis of mechanics model and formula of single pick, the calculating method of load fluctuation acting on cutting head during swing cutting is achieved. 根据单个截齿受力模型和计算公式,确立了截割头横摆截割时载荷波动的计算方法。
In the new model, the constraint of loading rate of transmission line is included to satisfy the long-term, small uncertain load fluctuation; 在新模型中,引入了线路负载率约束,使得规划后的网络能够适应未来长时小幅度的负荷不确定性波动;
On the basis of mechanical model and formula of single bit, the moment model and load fluctuation model of shearer's drum are built. 根据单个截齿的受力模型和计算公式,建立了采煤机滚筒力矩模型和载荷波动模型。
An identification method based on random load fluctuation has been proposed in this paper and applied in Beijing Shi. 该文提出一种基于随机负荷波动的水轮机模型辨识方法,并应用于北京十三陵抽蓄电站。
By the analysis of pick arrangement parameters influenced on the load acting on cutting head, the strategy is presented to depress the load fluctuation. 其中考虑了滚筒多数及排列模式的选择、制造的可能性及降低载荷波动为目的的截齿排列搭配参数的优选。
The example of multi-objective optimization design shows that load fluctuation and specific energy consumption of cutting head are evidently reduced, which increase working reliability and energy utilization quotiety of roadheader. 优化实例表明,截割头的载荷波动和比能耗得到了明显降低,提高了掘进机的工作可靠性和能量利用率。
Aiming at the unit sizing problem of the combined system, with the constraints of the load fluctuation, equipment performance characteristics and energy and flow balances, presents an optimal design method and establishes a nonlinear mathematical programming model. 针对热电(冷)联产系统的合理配置问题,综合考虑负荷波动、设备性能特性和系统的能流平衡,提出了一种优化设计方法,建立了非线性规划数学模型。
A new nodal static voltage stability index in which the load fluctuation can be considered is proposed. This index can reflect the probability of node static voltage collapse, and then the weak node of power system can be identified. 提出了一种可以考虑负荷波动的节点静态电压稳定指标,该指标可以表示节点静态电压崩溃的概率,进而识别出系统的薄弱节点。
Load fluctuation occurred when switching from single valve to sequential valve operation. 低压调门还常发生卡涩,单阀切顺序阀运行时负荷出现波动。
Valve failure such as valve stem failure due to stem vibration or rotating, load fluctuation, etc. 诸如阀杆振动、转动导致阀杆与阀损坏;
In addition, a method of identifying hydraulic system linear models based on random load fluctuation has been researched. 此外,本文还研究了基于随机负荷波动信号辨识水力系统线性化模型的方法。在水电机组并网运行工况下,随机负荷波动可看作白噪声扰动信号,可为模型辨识提供充分条件。
The energy consumption of the beam pumping unit is proportional to the coefficient of load fluctuation CLF. 游梁式抽油机的耗能量与载荷波动系数CLF成正比。
Comparison of the design with that of LXT 14/ 46 type drum is made. The test data show that the specific energy consumption reduces by 7 97%, the load fluctuation coefficient by 19 8% and the loading efficiency increases by 11 1%. 对LXT14/46型螺旋滚筒进行了对比计算,结果表明:螺旋滚筒的截割比能耗降低了7.97%,载荷波动系数减小了19.8%,装煤效率提高了11.1%。
The relations of the load fluctuation and the ripple waveform of output voltage is discussed. 设定各种负载变化,讨论了负载变化与电源输出电压波动的关系,并进行了仿真。
The results show that load fluctuation has an important effect on engine power performance and the engine performance indexes determined by conventional static testing method can't indicate its actual working performance. 结果表明,负荷波动对发动机的动力性能有着重大的影响,按照传统的静态试验方法所确定的发动机的性能指标不能说明其实际作业性能。
With the line resistance ignored, the Q-U characteristic curves of load and provision ends are analyzed in a simple power system and the influence of load fluctuation on them. 为此,在忽略线路电阻的前提下,首先在单机单负荷的简单系统中,分析了负荷侧与供电侧的Q-U特性曲线,并研究了负荷扰动对Q-U特性曲线的影响。
A design method of a robust rotational velocity controller of water hydraulic servomotor was presented for the uncertain parameters and the load fluctuation. 针对液压伺服马达的参数不确定性以及负载转矩脉动等问题,提出了一种鲁棒转速控制器的设计方法。
By the analysis of pick arrangement parameters influenced on the load acting on cutting head, the strategy is presented to depress the load fluctuation. And the mathematic model of optimal design for pick arrangement parameters based on minimum load fluctuation is built. 通过分析截齿排列参数对截割头载荷的影响,提出了降低载荷波动的策略,建立了基于载荷波动最小的截割头截齿排列参数优化设计数学模型。
The fundamental component of zero sequence voltage after switch-off was selected as the stator fault feature, which could effectively avoid the influence of the supply unbalance and load fluctuation and directly reflect the asymmetry in the stator. 选取断电后零序电压的基波分量作为定子故障特征,可有效避免电源不平衡和负荷波动的影响,直接反映电机定子的不对称度。
The load rate, load fluctuation rate and actual distribution of the torque moments of partial spindle of the mill have been analyzed. 分析了三辊劳特式轧机的负荷率、负荷波动率水平及分轴扭矩的分配实况。
For icing blade, propose individual pitch control strategy to reduce the load fluctuation. 对于叶片结冰的情况,提出了利用独立变桨距控制策略来减小载荷的波动。
The model on the basis of the principle of the arc thermal superimposed load fluctuation components to reflect the electric arc furnace grid harmonics, voltage fluctuations and three-phase imbalance. 该模型在电弧热学原理的基础上叠加了负荷波动成分,能够同时反映电弧炉对电网的谐波、电压波动及三相不平衡等影响。
Point out using the flywheel energy storage to reduce the large impact of the high load fluctuation to the power generator. 本文通过对飞轮储能系统的研究,提出对燃气轮机发电机组在大负荷波动情况下,采用飞轮储能装置进行平稳,以减小大负荷波动对发电机组的冲击作用。
The simulation results show that the power network stability can be enhanced, and the impact of the high load fluctuation can be reduced effectively by the application of the flywheel energy storage system. 仿真结果表明应用飞轮储能装置,能够增强电网稳定性,对船舶燃气轮机发电系统应对大负荷波动时,起到更好的平稳作用。
Energy storage can be used as the means to improve the system stability, regulate the frequency and compensate the load fluctuation. 储能技术也可作为提高系统运行稳定性、调整频率、补偿负荷波动的一种手段。
If load fluctuation is flat, transformer operation mode could be switched based on economic operation region; otherwise, the optimization method of transformer economic operation during a period of time is described based on short-term load forecast. 针对负荷波动不大的变电站可以依据经济运行区间切换变压器的运行方式;对负荷波动较大的情况,描述了一种基于短期负荷预测的一段时间内变压器经济运行优化方法。
There is a certain similarity between the photovoltaic output and the load fluctuation. 光伏发电输出功率与日负荷波动具有一定的相似性。