scholarly journals Dynamic Performance Comparison of Two Kalman Filters for Rate Signal Direct Modeling and Differencing Modeling for Combining a MEMS Gyroscope Array to Improve Accuracy

Sensors ◽  
2015 ◽  
Vol 15 (11) ◽  
pp. 27590-27610 ◽  
Author(s):  
Guangmin Yuan ◽  
Weizheng Yuan ◽  
Liang Xue ◽  
Jianbing Xie ◽  
Honglong Chang
Keyword(s):  
Kalman Filters ◽  
Dynamic Performance ◽  
Performance Comparison ◽  
Mems Gyroscope ◽  
Improve Accuracy ◽  
Direct Modeling

scholarly journals Small Signal Modeling and Analysis of a Dual Input Interleaved DC-DC Converter

2020 ◽  
Vol 8 (6) ◽  
pp. 5402-5411
Keyword(s):  
Performance Analysis ◽  
Closed Loop ◽  
Dynamic Performance ◽  
Energy System ◽  
Vital Role ◽  
Performance Comparison ◽  
Small Signal ◽  
Solar Pv ◽  
Modeling And Analysis ◽  
Hybrid Energy

The idea of DC-DC converter with multi-input is yet to attain a vital role in the field of 'hybrid energy system (HES)' integration and electric vehicle applications. So, the analysis of the dynamic behavior of the multi input converters is crucial in designing a proper controller to achieve a stable performance. This paper reports a 'small signal model (SSM)' and the performance analysis of a 'dual-input DC-DC converter (DIC)'. The parasitic resistances of capacitor and inductor are considered in the modelling. The significant transfer function (TF)s are derived with the help of the SSM, and the Bode plots for the TFs have been obtained. The performance analysis shows that the derived TFs allow better closed loop performance of the system. The simulation of the DIC converter in MATLAB/ Simulink® has been carried out and the simulation waveforms are presented. A hardware setup of the DIC converter is fabricated and experimented in the laboratory. The dynamic performance of the DIC is analyzed under the variations in the source and load conditions. The presented converter with a closed loop controller can be used in the applications to formulate a HES with solar-PV, battery, fuel cell, etc. Also the performance comparison of the DIC converter has been performed with other reported converters which shows that the DIC converter has higher efficiency and several other potential merits.

Performance Comparison of Displacement and Speed Control in Electro-Hydrostatic Actuator

2015 ◽  
Vol 779 ◽  
pp. 205-211
Author(s):  
Ji Hai Jiang ◽  
Qiao Liu ◽  
Jun Long Liu ◽  
Zhen Xiu Hou
Keyword(s):  
Dynamic Performance ◽  
Speed Control ◽  
High Gain ◽  
Performance Comparison ◽  
Displacement Control ◽  
Time Zone ◽  
Composite Control ◽  
Small Load ◽  
Actuation Systems

In recent years, power by wire (PBW) technique is developed in the European and American aviation field, and one of its important bases is electro-hydrostatic servo technique. In this paper, speed controlled and displacement controlled electro-hydrostatic actuation systems are modeled and simulated, by comparing their Bode graphics and time-zone respond curves, which shows that displacement control has small load inertia and high gain, so its dynamic performance is better. Thus, conclusion can be drawn that speed-displacement composite control may indeed improve the dynamic performance of electro-hydrostatic actuator.

scholarly journals Reduced sampling rate Kalman filters for carrier phase and frequency offset tracking in 200 Gbps 16 QAM coherent communication system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Srishti Sharma ◽  
Pradeep Kumar Krishnamurthy
Keyword(s):  
Kalman Filters ◽  
Communication Systems ◽  
Dynamic Performance ◽  
Sampling Rate ◽  
Single Step ◽  
Step Change ◽  
Convergence Time ◽  
Estimation Accuracy ◽  
Step Size ◽  
Optic Communication

AbstractWe propose 1 state and 2 state multi-step Kalman filters (MKFs) to estimate and compensate CFO, LPN and NLPN in long-haul coherent fiber-optic communication systems. The proposed filters generate state estimates once every m symbols and therefore operate at a reduced sampling rate compared to conventional KFs that perform symbol by symbol processing. No computations are performed to obtain phase estimates of the intermediate $$m-1$$ m - 1 samples; instead, the present and previous estimates are averaged and used to derotate the intermediate $$m-1$$ m - 1 samples which are then demodulated to recover the transmitted symbols. This reduces the computational load on the receiver DSP. Further, in order to improve estimation accuracy, we adaptively vary the process noise covariance Q. Simulation results of 200 Gbps PDM 16 QAM system over 12 spans shows that the proposed 1 state MKF can reduce the sampling rate requirement by a factor of $$m = 20$$ m = 20 with Q-factor degradation of 1.32 dB compared to single-step KF at linewidth of 100 kHz. The 2 state MKF tracks PN and CFO with a maximum step size of $$m=10$$ m = 10 for a CFO of 100 MHz at linewidth of 100 kHz. We also study the dynamic performance of the proposed algorithms by applying step change to CFO. The 2 state MKF with adaptive Q is able to track a step change of 400 MHz of CFO with $$m = 1$$ m = 1 and 3 with high estimation accuracy but slower convergence time compared to the non-adaptive 2 state MKF. Finally, we study the computational requirements of the proposed MKFs and show that they offer significant reduction in computations compared to single-step KF thus making the proposed filters suitable for hardware implementation.

Properties of Hydraulic Floating Caliper Brake for AGV Car

2014 ◽  
Vol 644-650 ◽  
pp. 33-36
Author(s):  
Ai Ran Li ◽  
Yu Jin Fan ◽  
Teng Han ◽  
Zhe Kun Li ◽  
Pei Lin Zhao ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Dynamic Performance ◽  
Performance Comparison ◽  
System Dynamic ◽  
Hydraulic Pressure ◽  
Electromagnetic Brake ◽  
Braking Performance ◽  
Comparison Test

Existing AGV car’s brakes are electromagnet brakes. Brake overheating causes brake damaged during work time.In this paper ,the hydraulic pressure floating caliper brake is applied to the AGV car . It with electromagnetic brake AGV car for braking performance comparison test, through comparative analysis know that hydraulic floating caliper brakes can not only meet the AGV car’s braking requirements and the system dynamic performance has improved greatly.

scholarly journals Modelling and simulation of ZDC controlled PMSG based wind energy conversion system

2018 ◽  
Vol 7 (1.8) ◽  
pp. 46
Author(s):  
Tripura Pidikiti ◽  
Tulasi Ram Das G
Keyword(s):  
Wind Energy ◽  
Energy Conversion ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dynamic Performance ◽  
Performance Comparison ◽  
Torque Control ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Energy Conversion Systems

This paper presents the comparison of dynamic performance and steady state operation of PMSG wind energy conversion systems with two modulation techniques. Voltage oriented control (VOC) is used for grid-connected converter along with sinusoidal pulse width modulation (SPWM) and Space Vector Modulation (SVM) schemes. The generator is controlled by using zero d- axis current (ZDC) control scheme along with optimal torque control (OTC). Performance comparison with two pulse width modulation schemes through simulation results are presented for 2MW/ 690V/ 9.75Hz Non-Salient Pole PMSG using MATLAB/SIMULINK.

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