scholarly journals Integrated DVB-X2 Receiver Architecture with Common Acceleration Engine

2019 ◽  
Vol 9 (19) ◽  
pp. 3983
Author(s):  
Youn-Sung Lee ◽  
Joongjin Kook
Keyword(s):  
Entire System ◽  
Laboratory Setting ◽  
Channel Decoding ◽  
Operating Modes ◽  
Clock Speed ◽  
Receiver Architecture ◽  
Technical Issues ◽  
Integrated Architecture ◽  
Multi Mode ◽  
Test Scenarios

This paper proposes an integrated DVB-X2 receiver architecture to support multi-mode broadcasting standards such as DVB-T2, DVB-C2, and DVB-S2 in a single platform. The entire system consists of a tuner block, a H/W-based receiver engine, a frame processor, and an A/V decoder. Specifically, an integrated architecture to solve key design and technical issues such as reducing the complexity of the receiver, efficiently accessing the H/W-based receiver engine, and simplifying an OFDM demodulator is proposed. The H/W-based receiver engine for DVB-X2 demodulation and channel decoding functions is implemented in two FPGA devices. The frame processor is implemented with 256 MB memory and a DSP operating at a clock speed of 1.0 GHz. To verify functionalities of the proposed DVB-X2 receiver, various test scenarios were considered in the laboratory setting. In particular, the proposed system was tested under various operating modes, as specified in standards such as DVB-T2, DVB-C2, and DVB-S2, and demonstrated successful operations in all test scenarios.

Investigation of flexible multi-mode harmonic vibration for the automatic washing process

2008 ◽  
Vol 222 (12) ◽  
pp. 2373-2384
Author(s):  
J-L Kuo ◽  
T-Y Wang
Keyword(s):  
Automatic Process ◽  
Vibration Modes ◽  
Blade Angle ◽  
Sinusoidal Vibration ◽  
Automatic Process Control ◽  
Flexible Control ◽  
Operating Modes ◽  
Washing Process ◽  
Mode Vibration ◽  
Multi Mode

This article discusses multi-mode vibration for the vibration motor in the washing process. Sinusoidal vibration modes for the speed servo command are carefully designed for flexible control. Different kinds of operating modes for possible automatic process control are provided. Three basic and five extended vibration modes for different operations are proposed. Simulation and experimental results will be compared to verify the formulation. To make the washing process more flexible, various servo commands are provided to be reconfigurable for the required vibration motion. Differing from the conventional approach of mechanically regulating the blade angle of the vibration motor, multi-mode vibration developed by the software approach is successfully proposed. It is easier for the washing process to be electrically regulated instead of it being a mechanical operation only. It is believed that this article will be beneficial for the application of an automatic washing process of the washing machine.

scholarly journals The condition for the maximum of the generalized power function in the problem of forming a multi-mode control law with limitation

2020 ◽  
Vol 210 ◽  
pp. 01003
Author(s):  
Andrey Kostoglotov ◽  
Sergey Lazarenko ◽  
Alexander Agapov ◽  
Zoya Lyashchenko
Keyword(s):  
Power Function ◽  
Control Law ◽  
Lagrange Equations ◽  
Control Laws ◽  
Operating Modes ◽  
Wide Range ◽  
Switching Line ◽  
Frequent Switching ◽  
Multi Mode ◽  
Accuracy Of Approximation

A quasi-optimal control law is developed based on the condition for the maxi-mum of the generalized power function taking into account the stationarity of the Hamiltonian on the switching line for control objects that can be represented by the Lagrange equations of the second kind. The comparative analysis is carried out based on the mathematical simulation using the optimal nonlinear control laws with respect to several criteria. We found that the modes of the proposed control law provide high accuracy of approximation to the optimal performance laws and the Fuller laws, reducing energy costs for control by eliminating more frequent switching. The choice of the parameters of the developed control law makes it possible to implement a wide range of both nonlinear and linear operating modes, which allows to classify the obtained control law as multimode law.

Multi-Mode Switching Control for HSA/EHA Hybrid Actuation System

2014 ◽  
Vol 494-495 ◽  
pp. 1088-1093 ◽  
Author(s):  
Li Li Guo ◽  
Li Ming Yu ◽  
Yang Lu ◽  
Dian Liang Fan
Keyword(s):  
Control System ◽  
Switching Control ◽  
Mode Switching ◽  
Operating Modes ◽  
Actuation System ◽  
Acceleration Feedback ◽  
Servo Actuator ◽  
Feedback Correction ◽  
Hybrid Actuation ◽  
Multi Mode

According to the switch transients problem existing in the Hybrid Actuation System (HAS), a multi-mode switching control system was proposed. This control system, based on the system feedback correction theory, can cater to the demands of dynamic characteristics and switch transients. To start with, the mathematical model of HAS was established on the basic of HASs operating principle, and the HAS is composed of Hydraulic Servo Actuator (HSA) and Electro-Hydrostatic Actuator (EHA). Further, the different operating modes controller are hammered out by employed the PID feedback correction control, and the acceleration feedback controller is added to the switched system to decreasing the switch transients. Finally, simulation results demonstrate the system is precise in tracking displacement signal, and it is validity of mitigating the switch transients by used method of feedback correction.

Synthesis of a Quasi-Optimal Multi-Mode Control Law Based on the Condition of the Maximum of the Function of the Generalized Power and the Principle of Release

2020 ◽  
pp. 29-35
Author(s):  
Sergey V. Lazarenko ◽  
Andrey A. Kostoglotov ◽  
Alexander A. Agapov ◽  
Zoya V. Lyaschenko
Keyword(s):  
High Accuracy ◽  
Control Law ◽  
Lagrange Equations ◽  
Operating Modes ◽  
Wide Range ◽  
Switching Line ◽  
Frequent Switching ◽  
Linear And Nonlinear ◽  
Multi Mode ◽  
Accuracy Of Approximation

A quasi-optimal multimode control law is developed on the basis of the condition for the maximum of the function of generalized power, taking into account the principle of exemption for control objects that can be represented by Lagrange equations of the second kind. A comparative analysis of the obtained solution was carried out on the basis of mathematical modeling. It is found that the modes of the proposed control law provide a high accuracy of approximation to the optimal speed laws and Fuller's laws with the possibility of eliminating more frequent switching. The developed control law by changing the switching line makes it possible to implement a wide range of linear and nonlinear operating modes, which allows the resulting control law to be classified as multimode.

Multi-mode light microscopy of microtubule assembly dynamics and chromosome movement in vivo and In vitro

1996 ◽  
Vol 54 ◽  
pp. 730-731
Author(s):  
E. D. Salmon ◽  
J. C. Waters ◽  
C. Waterman-Storer
Keyword(s):  
Imaging System ◽  
Ccd Camera ◽  
Transmitted Light ◽  
Microtubule Assembly ◽  
Live Cells ◽  
Optical Efficiency ◽  
Multiple Band ◽  
Multi Mode

We have developed a multi-mode digital imaging system which acquires images with a cooled CCD camera (Figure 1). A multiple band pass dichromatic mirror and robotically controlled filter wheels provide wavelength selection for epi-fluorescence. Shutters select illumination either by epi-fluorescence or by transmitted light for phase contrast or DIC. Many of our experiments involve investigations of spindle assembly dynamics and chromosome movements in live cells or unfixed reconstituted preparations in vitro in which photodamage and phototoxicity are major concerns. As a consequence, a major factor in the design was optical efficiency: achieving the highest image quality with the least number of illumination photons. This principle applies to both epi-fluorescence and transmitted light imaging modes. In living cells and extracts, microtubules are visualized using X-rhodamine labeled tubulin. Photoactivation of C2CF-fluorescein labeled tubulin is used to locally mark microtubules in studies of microtubule dynamics and translocation. Chromosomes are labeled with DAPI or Hoechst DNA intercalating dyes.

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