Measurement of optical magnitude response based on double-sideband modulation

2014 ◽  
Vol 39 (21) ◽  
pp. 6174 ◽  
Author(s):  
Ting Qing ◽  
Min Xue ◽  
Menghao Huang ◽  
Shilong Pan
Keyword(s):  
Magnitude Response

Optimal design of fractional order low pass Butterworth filter with accurate magnitude response

2018 ◽  
Vol 72 ◽  
pp. 96-114 ◽  
Author(s):  
Shibendu Mahata ◽  
Suman Kumar Saha ◽  
Rajib Kar ◽  
Durbadal Mandal
Keyword(s):  
Optimal Design ◽  
Fractional Order ◽  
Magnitude Response ◽  
Butterworth Filter ◽  
Low Pass

scholarly journals PID Controller Based Nelder Mead Algorithm for Electric Furnace System with Disturbance

1970 ◽  
Vol 10 (1) ◽  
pp. 71-79
Author(s):  
Vunlop Sinlapakun ◽  
Wudhichai Assawinchaichote
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Electric Furnace ◽  
Pid Controller ◽  
Direct Synthesis ◽  
Optimization Procedure ◽  
Temperature Control System ◽  
Magnitude Response ◽  
Furnace Temperature ◽  
Traditional Methods

This paper presents a design of PID controller for furnace temperature control system with disturbance. Currently, PID controller has been used to operate in electric furnace temperature control system because its structure is simpler compared to others. However, the issue of tuning and designing PID controller adaptively and efficiently is still open. This paper presents an improved PID controller efficiency from tuning by Nelder Mead method. The parameters of PID controller shall be obtained from the Nelder Mead optimization procedure. Errors between desired magnitude response and actual magnitude response are calculated by using the Integral of Absolute Error (IAE). The proposed Nelder Mead based PID design method is simpler, more efficient and effective than the existing traditional methods included Ziegler Nichols, Cohen-Coon and Direct Synthesis. Simulation result shows that the performance of PID controller using this proposed method is better than traditional methods and resistant to disturbance.

scholarly journals Design of multiplierless comb compensators with magnitude response synthesized as sinewave functions

2020 ◽  
Vol 33 (1) ◽  
pp. 1-14
Author(s):  
Gordana Jovanovic-Dolecek
Keyword(s):  
Design Parameters ◽  
Magnitude Response ◽  
Decimation Filter ◽  
Factor Design

This paper presents a research on design of multiplierless comb compensators with magnitude response synthesized as sinewave functions. First, it is elaborated the importance of comb decimation filter and why we need its compensator. In continuation are presented some favorable characteristics of comb compensator. The compensators, with magnitude characteristic synthesized as sinewave functions fulfill those favorable characteristics. Next, are described some most important results on design of compensators with sinewave-based magnitude responses including single and cascaded sinewave-based functions. In all designs are presented the overall corresponding magnitude responses and the zooms in the passband. The parameters of design generally depend only on number of cascaded combs and generally do not depend on decimation factor. Design parameters are presented in tables along with the corresponding required number of adders.

scholarly journals Improved Performance of M-Class PMUs Based on a Magnitude Compensation Model for Wide Frequency Deviations

Mathematics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1361
Author(s):  
Jose Roberto Razo-Hernandez ◽  
Ismael Urbina-Salas ◽  
Guillermo Tapia-Tinoco ◽  
Juan Pablo Amezquita-Sanchez ◽  
Martin Valtierra-Rodriguez ◽  
...  
Keyword(s):  
Power Systems ◽  
Frequency Range ◽  
Magnitude Response ◽  
Modulation And Demodulation ◽  
Variable Function ◽  
Low Pass ◽  
Measurement Units ◽  
Phasor Estimation ◽  
Improved Performance ◽  
Reporting Rates

Phasor measurement units (PMUs) are important elements in power systems to monitor and know the real network condition. In order to regulate the performance of PMUs, the IEEE Std. C37.118.1 stablishes two classes—P and M, where the phasor estimation is carried out using a quadrature oscillator and a low-pass (LP) filter for modulation and demodulation, respectively. The LP filter plays the most important role since it determines the accuracy, response time and rejection capability of both harmonics and aliased signals. In this regard and by considering that the M-class filters are used for more accurate measurements, the IEEE Std. presents different M-class filters for different reporting rates (when a result is given). However, they can degrade their performance under frequency deviations if the LP frequency response is not properly considered. In this work, a unified model for magnitude compensation under frequency deviations for all the M-class filters is proposed, providing the necessary values of compensation to improve their performance. The model considers the magnitude response of the M-class filters for different reporting rates, a normalized frequency range based on frequency dilation and a fitted two-variable function. The effectiveness of the proposal is verified using both static and dynamic conditions for frequency deviations. Besides that, a real-time simulator to generate test signals is also used to validate the proposed methodology.

Sign in / Sign up

Export Citation Format

Share Document