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一种多指标质量动态控制图及其应用 被引量:6
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作者 王金玉 章红雨 +1 位作者 刘军 潘德惠 《数理统计与管理》 CSSCI 北大核心 2007年第1期101-105,共5页
研究了将多指标在一个图上标示的多指标控制图。提出了三种质量控制限并作了比较。控制上限(UCL)取Hotelling的T2统计量的α/2上侧分位数。预控上限(UPCL)取Hotelling的T2统计量的λα/2上侧分位数。当第k个观测点的T2k值超过UPCL时,则... 研究了将多指标在一个图上标示的多指标控制图。提出了三种质量控制限并作了比较。控制上限(UCL)取Hotelling的T2统计量的α/2上侧分位数。预控上限(UPCL)取Hotelling的T2统计量的λα/2上侧分位数。当第k个观测点的T2k值超过UPCL时,则接下去的抽样区间将缩短,以便及早发现失控状态。对超出控制限的情况下如何确定哪一个质量指标发生异常的问题,提出了一种可靠的分析方法。用这种方法解决了某卷烟厂的烟丝生产过程中的多指标质量控制和管理问题。 展开更多
关键词 多指标 质量控制图 T^2统计量 上侧分位数 预控限 失控分析
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Active disturbance rejection control FCS-MPC strategy based on ESO of PMSM system 被引量:2
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作者 ZHANG Bin WEN Xue LI Kun-qi 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2018年第2期140-147,共8页
In order to improve the control performance of three-phase permanent magnet synchronous motor(PMSM)system,an active disturbance rejection finite control set-mode predictive control(FCS-MPC)strategy based on improved e... In order to improve the control performance of three-phase permanent magnet synchronous motor(PMSM)system,an active disturbance rejection finite control set-mode predictive control(FCS-MPC)strategy based on improved extended state observer(ESO)is proposed in this paper.ESO is designed based on the arc-hyperbolic sine function to obtain estimations of rotating speed and back electromotive force(EMF)term of motor speed.Active disturbance rejection control(ADRC)is applied as speed controller.The proposed FCS-MPC strategy aims to reduce the electromagnetic torque ripple and the complexity and calculation of the algorithm.Compared with the FCS-MPC strategy based on PI controller,the constructed control strategy can guarantee the reliable and stable operation of PMSM system,and has good speed tracking,anti-interference ability and robustness. 展开更多
关键词 extended state observer(ESO) auto disturbance rejection control(ADRC) finite control set-mode predictive control(FCS-MPC) permanent magnet synchronous motor(PMSM) arc-hyperbolic sine function
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Impact of Capacity Parameters on Flexible Inventory Control Decision Model
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作者 WANG Yi LE Meilong 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第S01期124-132,共9页
From the mathematical point of view,the flexible inventory control model is proved in the practical problem application and the rationality of the capacity parameter selection and calculation.The purpose is to activel... From the mathematical point of view,the flexible inventory control model is proved in the practical problem application and the rationality of the capacity parameter selection and calculation.The purpose is to actively respond to demand fluctuations when there is a demand forecast error or a missing part of the demand information,and to avoid the risk of passive variable demand forecasting to set the immutable inventory capacity.At the same time,the game is controlled by the flexible and variable inventory control strategy and the customer’s willingness to demand.The paper mainly studies the influence of the setting of capacity parameters on the booking-limit decision and its benefits under the control of flexible space with variable total capacity.Through the two trends of capacity increase flexibility and capacity reduction flexibility in the flexible inventory control model,the mathematical performance and marginal utility methods are introduced to change the performance of the booking-limit control decision model under different scenarios.The correlation analysis between the capacity limit level and the return under the optimal Bookinglimit decision,and the above two flexibility parameters are obtained. 展开更多
关键词 flexible inventory control capacity parameter booking-limit control decision model revenue management
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Model predictive control of three-level active front-end converter with low switching frequency
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作者 YANG Li WANG Lang-zhu +1 位作者 FENG Bo WANG Hong-lin 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2018年第2期153-159,共7页
In medium voltage-high power(MV-HP)applications,the high switching frequency of power converter will result in unnecessary energy losses,which directly affect efficiency.To resolve this issue,a novel finite control se... In medium voltage-high power(MV-HP)applications,the high switching frequency of power converter will result in unnecessary energy losses,which directly affect efficiency.To resolve this issue,a novel finite control set-model predictive control(FCS-MPC)with low switching frequency for three-level neutral point clamped-active front-end converters(NPC-AFEs)is proposed.With this approach,the prediction model of three-level NPC-AFEs is established inα-βreference frame,and the control objective of low average switching frequency is introduced into a cost function.The proposed method not only achieves the desired control performance under low switching frequency,but also performs the efficient operation for the three-level NPC-AFEs.The simulation results are provided to verify the effectiveness of proposed control scheme. 展开更多
关键词 finite control set-model predictive control(FCS-MPC) three-level neutral point clamped active front-end converters(NPC-AFEs) switching frequency
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FCS-MPC for four-switch three-phase AC-DC converters with DC-link capacitor voltage balancing
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作者 MA Wei-jie ZHANG Bao-ge 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第2期150-156,共7页
Due to the decrease in the number of switches for the four-switch three-phase alternating current-direct current(FSTP AC-DC)converter,it can easily lead to DC-link capacitor voltage imbalance and the system stability ... Due to the decrease in the number of switches for the four-switch three-phase alternating current-direct current(FSTP AC-DC)converter,it can easily lead to DC-link capacitor voltage imbalance and the system stability reduction.In order to solve these problems,a finite control set model predictive control(FCS-MPC)for FSTP AC-DC converters with DC-link capacitor voltage balancing is proposed.In this strategy,in order to facilitate calculation,theαβcoordinate system model is established and all voltage vectors are evaluated by establishing a cost function.During the whole process,phase locked loop(PLL)and complex modulation strategy are not required.In the new established cost function,the additional objective term of suppressing capacitor voltage fluctuation is to eliminate effectively the capacitor voltages oscillations and deviations and improve the system reliability.The simulation results show that the proposed strategy can keep the capacitor voltage balancing and has good dynamic and static performance. 展开更多
关键词 finite control set model predictive control(FCS-MPC) four-switch three-phase alternating current-direct current(FSTP AC-DC)converters cost function capacitor voltage balancing
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Speed sensorless FCS-MPTC based on FOSM-MRAS five-phase permanent magnet synchronous motor
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作者 ZHANG Haiming WANG Yunkun +1 位作者 MIAO Zhongcui WANG Zhihao 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2022年第3期309-319,共11页
For the two-level five-phase permanent magnet synchronous motor(FP-PMSM)drive system,an improved finite-control-set model predictive torque control(MPTC)strategy is adopted to reduce torque ripple and improve the cont... For the two-level five-phase permanent magnet synchronous motor(FP-PMSM)drive system,an improved finite-control-set model predictive torque control(MPTC)strategy is adopted to reduce torque ripple and improve the control performance of the system.The mathematical model of model reference adaptive system(MRAS)of FP-PMSM is derived and a method based on fractional order sliding mode(FOSM)is proposed to construct the model reference adaptive system(FOSMMRAS)to improve the motor speed estimation accuracy and eliminate the sliding mode integral saturation effect.The simulation results show that the FP-PMSM speed sensorless FCS-MPTC system based on FOSM-MRAS has strong robustness,good dynamic performance and static performance,and high reliability. 展开更多
关键词 model reference adaptive system(MRAS) finite-control-set model predictive torque control(FCS-MPTC) fractional order sliding mode(FOSM) speed sensorless five-phase permanent magnet synchronous motor(FP-PMSM)
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