A Study for the Screen Door Motor System Driving Stiffness of Dynamic Load Condition

<p>Underground laboratories, due to their unique location, are facilities with high research and educational potential. Development of old mine chambers or setting up of new mining panels designed strictly for research and educational purpose may contribute to the development of new mining technologies. One of the initiatives aimed to enhance of the underground space usage in Europe is BSUIN project conducted in the framework of INTERREG Baltic Sea Region program. At the moment there is only one underground laboratory designed fully for research and development purposes i.e. Experimental Mine Barbara lead by Central Mining Institute of Poland. But still, there are several dozen active underground mines working in Poland. Unfortunately, the large scale of the mined-out area contributes to the generation of relatively high seismicity around mining regions. Due to safety reasons management of Polish underground mines in most cases do not allow to build such a facility like underground laboratories in close vicinity of active mining works.</p><p>Within this paper, the prototype of an underground laboratory affected by additional seismic load was prepared in condition of Polish underground copper mine. Changes in total displacement and stresses around newly created chambers with use of FEM-based numerical modelling were determined. In result possibility of setting up of underground facility under dynamic load condition was determined.</p>

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Robustness Analysis of PID-Cuckoo Search Algorithm to Voltage Control in Three Phase of Synchronous Generator with Dynamic Load Condition

2018 International Electronics Symposium on Engineering Technology and Applications (IES-ETA) ◽

10.1109/elecsym.2018.8615486 ◽

2018 ◽

Cited By ~ 1

Author(s):

Moh. Zaenal Efendi ◽

Farid Dwi Murdianto ◽

Hayat Nur Baweani

Keyword(s):

Dynamic Load ◽

Search Algorithm ◽

Robustness Analysis ◽

Load Condition ◽

Voltage Control ◽

Synchronous Generator ◽

Cuckoo Search ◽

Cuckoo Search Algorithm ◽

Three Phase

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Optimal Capacitor Placement in Radial Distribution Feeders Using Fuzzy-Differential Evolution for Dynamic Load Condition

Journal of The Institution of Engineers (India) Series B ◽

10.1007/s40031-014-0157-1 ◽

2014 ◽

Vol 96 (4) ◽

pp. 363-370 ◽

Cited By ~ 3

Author(s):

S. M. Kannan ◽

P. Renuga ◽

S. Kalyani ◽

E. Muthukumaran

Keyword(s):

Differential Evolution ◽

Radial Distribution ◽

Dynamic Load ◽

Load Condition ◽

Capacitor Placement ◽

Optimal Capacitor Placement

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Adaptive Trajectory Tracking Control of Nanopositioning Stage Under Dynamic Load Condition

Volume 12: Micro and Nano Systems, Parts A and B ◽

10.1115/imece2009-12548 ◽

2009 ◽

Author(s):

Mohammad Sheikh Sofla ◽

Seyed Mehdi Rezaei ◽

Mohammad Zareinejad

Keyword(s):

Trajectory Tracking ◽

Dynamic Load ◽

Tracking Control ◽

Nonlinear Function ◽

Load Condition ◽

Piezoelectric Actuators ◽

Trajectory Tracking Control ◽

Control Approach ◽

Practical Applications ◽

Hysteresis Nonlinearity

Piezoelectric actuators (PEAs) are frequently used in a wide variety of micromanipulation systems. However their accuracy is limited due to hysteresis nonlinearity. Also investigation of the fundamental properties of the piezoceramics depicts that external mechanical loads cause inclination in hysteresis loop which can deteriorate tracking performance furthermore. A novel modeling and control approach is proposed in this paper, for precision trajectory tracking control of piezoelectric actuators under dynamic load condition. First the hysteresis nonlinear function based on Bouc-Wen hysteresis model is approximated by a Taylor series expansion. Then an adaptive trajectory tracking control is proposed based on the backstepping method using the developed mathematical model. The asymptotical stability in displacement tracking and robustness to the dynamic load disturbance can be provided using the proposed control approach. Experimental results are illustrated to verify the efficiency of the proposed method for practical applications.

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Harmonic Mitigation in Electric Railway Systems Using Improved Model Predictive Control

Energies ◽

10.3390/en14072012 ◽

2021 ◽

Vol 14 (7) ◽

pp. 2012

Author(s):

Chakrit Panpean ◽

Kongpol Areerak ◽

Phonsit Santiprapan ◽

Kongpan Areerak ◽

Seang Shen Yeoh

Keyword(s):

Model Predictive Control ◽

Power Quality ◽

Predictive Control ◽

Dynamic Load ◽

High Speed ◽

Load Condition ◽

Synchronous Detection ◽

Harmonic Current ◽

Ieee Standard ◽

Electric Railway

An electric multiple unit (EMU) high-speed train is the dynamic load that degrades the power quality in an electric railway system. Therefore, a power quality improvement system using an active power filter (APF) must be considered. Due to the oscillating load current in the dynamic load condition, a fast and accurate harmonic current-tracking performance is required. As such, this paper proposes the design of a model predictive control (MPC) since the minimization of cost function in the MPC process can suitably determine APF switching states. The design technique of MPC is based on the APF mathematical model. This controller was designed to compensate the time delay in the digital control. Moreover, the synchronous detection (SD) method applied the reference current calculations, as shown in this paper. To verify the proposed MPC, the overall control of APF was implemented on a eZdsp F28335 board by using the hardware-in-the-loop technique. The testing results indicated that the proposed MPC can provide a fast and accurate harmonic current-tracking response compared with the proportional-integral controller. In the load changing condition, the MPC was still effective in providing a good result after compensation. The percentage of total harmonic distortion, the percentage current unbalance factor, and the power factor would also be kept within the IEEE Standard 519 and IEEE Standard 1459.

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Research on Deformation Characteristics and Control Technology of Soft Rock Roadway under Dynamic Disturbance

Shock and Vibration ◽

10.1155/2021/6625233 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Chuan-Wei Zang ◽

Yang Chen ◽

Miao Chen ◽

Hong-Mo Zhu ◽

Chen-Ming Qu ◽

...

Keyword(s):

Numerical Simulation ◽

Coal Mine ◽

Dynamic Load ◽

Static Load ◽

Load Condition ◽

Soft Rock ◽

Propagation Distance ◽

Long Term Stability ◽

Load Intensity ◽

And Control

In the mining process of an underground coal mine, the dynamic load often causes great damage to the roadway and affects the normal mining of coal mine. In this paper, the deformation of surrounding rocks under static load and different disturbance intensities is studied by numerical simulation. The results show that under the same static load condition, the greater the dynamic load strength is, the more obvious the roadway roof displacement subsidence is. With the increase in dynamic load propagation distance, the amplitude of the dynamic load waveform decreases gradually. Under the same disturbance load intensity, the variation of roadway displacement with different disturbance load frequencies is studied. According to the influence of dynamic load on the deformation of the roadway, a combined support plan of shotcrete anchor net and reinforcement anchor cable is proposed. Finally, the rationality of the optimized support scheme is verified by numerical simulation and field results. The results show that the combined support scheme can effectively increase the strength of the broken soft rock and reduce the deformation of the surrounding rock. At the same time, it releases the expansion energy generated by the mutual compression and deformation of the rock layers, effectively maintaining the long-term stability of the roadway.

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