A Design of Loop Control Method for Feedforward Power Amplifier

2012 ◽  
Vol 588-589 ◽  
pp. 731-734
Author(s):  
Hua Zhou ◽  
Lu Yu Wang ◽  
Wei Chang
Keyword(s):  
Theoretical Analysis ◽  
Power Amplifier ◽  
Control Method ◽  
Design Method ◽  
System Simulation ◽  
Design System ◽  
Control Methods ◽  
Loop Control ◽  
Analysis And Design ◽  
Signal Cancellation

This letter delivered an analysis and design method of signal cancellation loop for feedforward power amplifier. To begin with the inherent defects of feedforward amplifier, it stated the merits and drawbacks of existing feedforward amplifier loop control methods, then put forward a new signal cancellation loop control method, namely separating amplitude feedback and phase feedback in signal cancellation loop, then advanced the theoretical analysis and calculation. The result of theoretical calculation was in line with the outcome of simulation, which confirmed through ADS (Advanced Design System) simulation. This method has multiple advantages: high feedback convergence rate, readily implementation and high linearity.

The Analysis and Design of Three-Phase Static Inverter Deadband Effect and Harmonic Suppression

2013 ◽  
Vol 575-576 ◽  
pp. 293-296
Author(s):  
Qun Min Yan
Keyword(s):  
Control Method ◽  
Design Method ◽  
Harmonic Suppression ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Analysis And Design ◽  
Three Phase ◽  
Low Pass ◽  
Harmonic Components ◽  
Simulated Analysis

in order to solve the problem of three-phase static inverter output waveform distortion, detailed analyzed of the voltage distortion caused by the deadband effect and the resulting harmonic components. The control method is proposed to set the deadband time combining with the voltage compensation, while in order to improve the inverter output, the converter output to design a trap filter and a low pass filter cascaded filtering circuit. Simulated analysis the entire system though Saber, using the digital chip TMS320F2812 to achieve appropriate compensation strategies, simulation results and experimental results have all proved the effectiveness of the design method.

Meshing analysis and design of rotundity-datum-aperture Hy-Vo silent chain

2008 ◽  
Vol 222 (7) ◽  
pp. 1297-1303 ◽  
Author(s):  
F Meng ◽  
X Liu ◽  
S Xu
Keyword(s):  
Design Method ◽  
Design System ◽  
Analysis And Design ◽  
Vital Importance ◽  
Transmission Properties ◽  
Pressure Angle

The proper meshing design of rotundity-datum-aperture Hy-Vo silent chain and involute sprockets is of vital importance to ensure the favourable transmission properties of the system consisting of the silent chain and involute sprockets. Based on the study of the meshing theory of rotundity-datum-aperture Hy-Vo silent chain and involute sprockets and the rolling cutting theory between sprocket and hob, the meshing design system is built among rotundity-datum-aperture Hy-Vo silent chain, sprocket, and hob, and the resolved expressions are put forward, which may instruct meshing design and calculation of Hy-Vo silent chain and sprocket. The paper also discusses the variation of the equivalent side-heart distance and the effect of the sprocket pressure angle on the meshing between Hy-Vo silent chain and sprocket. The application in real engineering proves that the new design method is scientific and feasible.

Design of Single-Phase Active Power Filter

2013 ◽  
Vol 329 ◽  
pp. 421-425
Author(s):  
Xi Feng Xie ◽  
Li Ling Zheng
Keyword(s):  
Real Time ◽  
Single Phase ◽  
Control Method ◽  
Design Method ◽  
Active Power Filter ◽  
Active Power ◽  
Control Methods ◽  
Experimental Platform ◽  
Power Filter ◽  
Detecting Method

Aiming at the features of complexity, poor real-time and Low-accuracy of single-phase Active Power Filter (APF), and the problem of impossible parallel computation in the traditional DSP software realization, new design method of APF Based on FPGA is proposed, This paper focuses on the study of the harmonic current detecting method and improves control method of compensate current, it builds an experimental platform with FPGA EP1C12Q240C8 as the controller, the experimental results all support the effectiveness and correctness of the control methods and design methods of APF.

scholarly journals Dynamic Decoupling and Intelligent Optimal PID Controller Tuning of Multivariable Qua-drones

2021 ◽  
Vol 10 (4) ◽  
pp. 228-240
Author(s):  
Prof. Dong Hwa Kim ◽  
Keyword(s):  
Pid Control ◽  
Control Method ◽  
Control Methods ◽  
System Matrix ◽  
Loop Control ◽  
Decoupling Method ◽  
Optimal Response ◽  
Single Loop ◽  
Dynamic Decoupling ◽  
Pid Controller Tuning

This paper deals with dynamic decoupling and its intelligent PID control method of multivariable qua-drone. Up to this time, many sophisticated intelligent algorithms and control methods for drone systems have been mentioned. However, almost many cases have been focusing on single loop control methods and general multivariable systems. Therefore, we cannot guarantee its stability and optimal response by PID control used in multivariable qua-drone. Herein, this paper suggests a novel control method for PID control for multivariable qua-drone. As first step, this paper decouples dynamic of multivariable qua-drone using diagonal method of system matrix and then applies intelligent method PSO and GA to single loop obtained by decoupling method to obtain optimal response.

Displacement vectors control method for orienter ribs during path correction in coiled tubing drilling

2018 ◽  
Vol 233 (10) ◽  
pp. 3531-3546
Author(s):  
Meng Li ◽  
Kanhua Su ◽  
Shuli Hu ◽  
Lifu Wan ◽  
Weiqing Chen
Keyword(s):  
Control Method ◽  
Design Method ◽  
Displacement Vector ◽  
Minimum Energy ◽  
Periodic Variation ◽  
Directional Drilling ◽  
Original Design ◽  
Loop Control ◽  
Coiled Tubing ◽  
Displacement Vectors

The well path easily deviates from the original design trajectory during coiled tubing drilling, which needs to be corrected with an orienter. A three-segment correction trajectory with two arc segments and a line segment is constructed based on the differential geometry principle, and the direction at the target is consistent with the direction of the original borehole. Based on the parameters of the design correction trajectory, a mathematical relationship between trajectory parameters and the displacement vectors of orienter ribs is established by using the vector analysis method. According to the principle of minimum energy, the problem of multisolvability in mathematics is avoided. Then, the control model of the displacement vectors of orienter ribs with the parameters' variation of the designed correction trajectory is established. The similarly periodic variation rule of displacements of orienter ribs with the variation of tool face angle is obtained, and the closed-loop control scheme for correction trajectory while drilling is made. The results of field test show that by using coiled tubing drilling, during the circular arc section of the designed three-segment correction trajectory, the displacement vectors of orienter ribs vary similarly periodically, which is called the directional drilling mode. During drilling in the slanted segment, the displacements of each rib are equal, which is called the keeping drilling mode. The design method of correction trajectory and the displacement vector control method of the orienter ribs are practicable during path correction in coiled tubing drilling, which is helpful to improve the efficiency of coiled tubing drilling.

Optimized Pulse Modulation: A Novel Idea of a Digital Control Method for On/Off Valves

2011 ◽  
Author(s):  
Ingo Schepers ◽  
Daniel Weiler ◽  
Juergen Weber
Keyword(s):  
Digital Control ◽  
Closed Loop ◽  
Control Method ◽  
Closed Loop Control ◽  
The Novel ◽  
Control Methods ◽  
Pulse Control ◽  
Pulse Modulation ◽  
Loop Control ◽  
The Common

This article describes how on/off valves can be used in the closed loop control. After studying different industrial hydraulic applications typical requirements will be compiled. From these requirements a basic on/off valve architecture will be derived. In this article the number of parallel connected on/off valves per control edge is limited to one valve. So the typical digital hydraulics with a high number of parallel connected valves is not considered. The on/off valves could not be controlled like normal directional valves. To control on/off valves digital control methods are common to use. The digital control methods are not optimized for the hydraulic on/off valves, because the origins of the digital control methods will be found in the electrical engineering. The novel idea for the digital control methods is the optimized pulse control which eliminates the disadvantages of the common digital control methods. How the optimized pulse control works is described in this article.

Study on the Present Condition and it’S Key Technique to Prospect of the High Frequency Resonance Transform Using in Electrostatic Dust Separator

2011 ◽  
Vol 65 ◽  
pp. 126-130
Author(s):  
Cun Bing Gui ◽  
Chen Guo ◽  
Yang Liu
Keyword(s):  
High Frequency ◽  
Control Method ◽  
Design Method ◽  
Present Condition ◽  
Mode Analysis ◽  
Analysis And Design ◽  
Frequency Resonance ◽  
Dust Separator ◽  
High Frequency Resonance ◽  
And Control

This text make a detailed introduction and comparative analysis on the type , the work mode, analysis and design method, and control method...etc of the high frequency resonance transform machine to the current electrostatic dust separator and at the same time it also make a tally up the problem that the key wants to work out.

Dynamic Simulation for Grid-Connected Inverters of Distributed Generation Based on DIgSILENT Software

2013 ◽  
Vol 291-294 ◽  
pp. 2042-2046
Author(s):  
Zhang Le Zhao ◽  
You Bing Zhang ◽  
Jun Qi
Keyword(s):  
Distributed Generation ◽  
Control Strategy ◽  
Control Method ◽  
Control Strategies ◽  
Simulation Models ◽  
Double Loop ◽  
Rotating Frame ◽  
Control Methods ◽  
Outer Loop ◽  
Loop Control

This paper introduces some typical control methods for the grid-connected inverters in the distributed generation (DG) systems, the double-loop control strategy is focused on and analyzed in detail. The proposed outer-loop control strategies are summarized. Meanwhile, the inner-loop control method established on dq rotating frame is introduced. The simulation models of the inverters for DG in the DIgSILENT software are introduced, and the simulations for the proposed control strategies are realized.

scholarly journals Analisis dan Perancangan Sistem Informasi Akuntansi Penjualan dan Persediaan

The Winners ◽  
2008 ◽  
Vol 9 (1) ◽  
pp. 88
Author(s):  
Henny Hendarti ◽  
Anton Anton ◽  
Didi Didi ◽  
Mochtar Cakra
Keyword(s):  
System Analysis ◽  
Foreign Currency ◽  
Design Method ◽  
Recording System ◽  
Design System ◽  
Study Analysis ◽  
Literature Study ◽  
Analysis And Design ◽  
Analysis System ◽  
Computerized System

Article purpose was to make computerized system useable for running the company operational and the activity always needs information. The data collecting method were done by literature study, field study, and documentation study. Analysis and design method consisted of four phase, which were investigation system, analysis system, design system, and implementation system. The result from observation was the company needs transaction recording system that computerized so every selling or buying transaction of foreign currency can directly update the inventory. The conclusion is that the up-to-date selling and inventory information can help manager in making decision.

An Efficient Approach for Modeling and Control of a Quadrotor

2016 ◽  
Vol 4 (2) ◽  
pp. 1-16
Author(s):  
Ahmed S. Khusheef
Keyword(s):  
Pid Control ◽  
Control Method ◽  
Mechanical Design ◽  
Loop Control ◽  
Modeling And Control ◽  
Loop Control System ◽  
And Control ◽  
Close Loop Control ◽  
Close Loop Control System ◽  
Made In

 A quadrotor is a four-rotor aircraft capable of vertical take-off and landing, hovering, forward flight, and having great maneuverability. Its platform can be made in a small size make it convenient for indoor applications as well as for outdoor uses. In model there are four input forces that are essentially the thrust provided by each propeller attached to each motor with a fixed angle. The quadrotor is basically considered an unstable system because of the aerodynamic effects; consequently, a close-loop control system is required to achieve stability and autonomy. Such system must enable the quadrotor to reach the desired attitude as fast as possible without any steady state error. In this paper, an optimal controller is designed based on a Proportional Integral Derivative (PID) control method to obtain stability in flying the quadrotor. The dynamic model of this vehicle will be also explained by using Euler-Newton method. The mechanical design was performed along with the design of the controlling algorithm. Matlab Simulink was used to test and analyze the performance of the proposed control strategy. The experimental results on the quadrotor demonstrated the effectiveness of the methodology used.

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