Study on Simulation of Ocean Wave Generation System Based on SIMULINK

2013 ◽  
Vol 300-301 ◽  
pp. 133-139
Author(s):  
Shi Ming Wang ◽  
Jing He
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Axial Flow ◽  
External Input ◽  
Ocean Wave ◽  
Hydraulic Motor ◽  
Generation System ◽  
The Stability ◽  
Conversion Equation ◽  
System Power

Designed a generation system by using ocean wave power for seabed-base detector. The system is mainly composed of an energy conversion device, hydraulic system, power generation system and automatic control system. This paper showed the composition of each subsystem, including the structure of axial flow turbine and the conversion equation of PID control system, hydraulic motor system. The simulation model is established by using SIMULINK block of MATLAB software, gave the results in two different conditions, one have the stability external input and the other don’t meanwhile the hydraulic system will turn to accumulator circuit. The simulation results show that this system can provide stable power output as the real system design reference.

Research of Velocity Stability of Separate Meter in and Separate Meter out Control System for Over-Running Load

2015 ◽  
Vol 727-728 ◽  
pp. 752-756
Author(s):  
Zhong Yi Cao ◽  
Xin Ming Liu ◽  
Wan Rong Wu
Keyword(s):  
Control System ◽  
Simulation Model ◽  
Hydraulic System ◽  
The Novel ◽  
Velocity Control ◽  
Factors Affecting ◽  
Simulation And Experiment ◽  
The Stability

There are some defects in the traditional over-running load hydraulic system, such as velocity control is poor and prone to velocity jitter, etc. In order to improve these weaknesses, the components and work principle of the separate meter in and separate meter out (SMISMO) were introduced and the actuator’s feature were analyzed , the simulation model of hydraulic studied system was built, the factors affecting the stability of the system are discussed in this paper. Simulation and experiment showed that the novel control system possessed higher velocity control precise and good stable characteristics.

Design of the Hydraulic System of Lead Plate Coiling Machine

2014 ◽  
Vol 937 ◽  
pp. 336-340
Author(s):  
Hui Sen ◽  
Rui Bo Yuan ◽  
Rong Li
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Position Control ◽  
Torque Control ◽  
Tension Control ◽  
Hydraulic Motor ◽  
Relief Valve ◽  
Lead Plate ◽  
Hydraulic Servo ◽  
Close Loop Control

This paper mainly introduces the process of lead electrolysis, the structure and working principle of lead plate coiling machine and Its’ parts, coiling machine components. First of all, rewind section hydraulic system adopts a return to the oil throttle speed control, it is stable and can bear a certain change load, can overcome the stage before the tension fluctuation of the impaction to the rotation speed of hydraulic motor. Secondly, speed and tension control system adopt electro-hydraulic servo valve and proportional relief valve are respectively to the drum speed and output torque control,it has high precision and accurate in speed and tension control. contact coiling section use electro hydraulic servo position control system with close loop control to improve the accuracy of position control. Finally, calculate parameters of each working section of hydraulic control system , verify the hydraulic component model and the rationality of the hydraulic circuit.

Power Control Modes and Performance Analysis of Excavator Hydraulic System

2013 ◽  
Vol 427-429 ◽  
pp. 759-762
Author(s):  
Hui Xian Han
Keyword(s):  
Control System ◽  
Power Control ◽  
Hydraulic System ◽  
Fast Response ◽  
Positive Control ◽  
Negative Control ◽  
Control Mode ◽  
Development Direction ◽  
And Performance ◽  
System Power

The article reviews the evolution of excavator hydraulic system power control mode, analyzes the structure and the advantage and disadvantage of main power control system such as throttle control system, negative control system and positive control system. The positive control system has the advantages of little power loss, fast response and high flow matching, which is the better control mode. Finally the paper prospects the development direction of excavator hydraulic system power control mode.

Investigation of the stability of periodic motions in a nonlinear automatic control system based on the fast fourier transform

2003 ◽  
Vol 3 ◽  
pp. 297-307
Author(s):  
V.V. Denisov
Keyword(s):  
Fourier Transform ◽  
Control System ◽  
Automatic Control ◽  
Fast Fourier Transform ◽  
Automatic Control System ◽  
Resonance Phenomenon ◽  
Periodic Motions ◽  
Multiply Connected ◽  
Non Linear ◽  
The Stability

An approach to the study of the stability of non-linear multiply connected systems of automatic control by means of a fast Fourier transform and the resonance phenomenon is considered.

scholarly journals A Unified Control Strategy of Distributed Generation for Grid-Connected and Islanded Operation Conditions Using an Artificial Neural Network

2021 ◽  
Vol 13 (11) ◽  
pp. 6388
Author(s):  
Karim M. El-Sharawy ◽  
Hatem Y. Diab ◽  
Mahmoud O. Abdelsalam ◽  
Mostafa I. Marei
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Control System ◽  
Distributed Generation ◽  
Control Strategy ◽  
Current Control ◽  
Operating Conditions ◽  
Pi Controllers ◽  
Artificial Neural ◽  
The Stability

This article presents a control strategy that enables both islanded and grid-tied operations of a three-phase inverter in distributed generation. This distributed generation (DG) is based on a dramatically evolved direct current (DC) source. A unified control strategy is introduced to operate the interface in either the isolated or grid-connected modes. The proposed control system is based on the instantaneous tracking of the active power flow in order to achieve current control in the grid-connected mode and retain the stability of the frequency using phase-locked loop (PLL) circuits at the point of common coupling (PCC), in addition to managing the reactive power supplied to the grid. On the other side, the proposed control system is also based on the instantaneous tracking of the voltage to achieve the voltage control in the standalone mode and retain the stability of the frequency by using another circuit including a special equation (wt = 2πft, f = 50 Hz). This utilization provides the ability to obtain voltage stability across the critical load. One benefit of the proposed control strategy is that the design of the controller remains unconverted for other operating conditions. The simulation results are added to evaluate the performance of the proposed control technology using a different method; the first method used basic proportional integration (PI) controllers, and the second method used adaptive proportional integration (PI) controllers, i.e., an Artificial Neural Network (ANN).

A Study on the Stability of Marine Gas Turbine Generation Module Power System

2012 ◽  
Vol 516-517 ◽  
pp. 1877-1880
Author(s):  
Zhi Tao Wang ◽  
Shu Ying Li ◽  
Xiao Xia Huang ◽  
Tie Lei Li
Keyword(s):  
Energy Storage ◽  
Gas Turbine ◽  
Simulation Models ◽  
Storage Device ◽  
Energy Storage Device ◽  
Generation System ◽  
Heavy Load ◽  
Modular Modeling ◽  
Modular Model ◽  
The Stability

Based on modular modeling idea, the modular model of marine generation system was set by the technology of systematic simulation. One set of simulation models of marine gas turbine generation system was generated. Results show that flywheel energy storage device can enhance the stability of power grid and play a better role in making marine gas turbine generation system stable under heavy load fluctuations.

The Correlation between Time and Frequency Dynamic Performance of Control System

2014 ◽  
Vol 628 ◽  
pp. 186-189
Author(s):  
Meng Xiong Zeng ◽  
Jin Feng Zhao ◽  
Wen Ouyang
Keyword(s):  
Control System ◽  
Performance Index ◽  
Dynamic Performance ◽  
Frequency Domain Analysis ◽  
Practical Significance ◽  
Order System ◽  
Time Frequency ◽  
Performance Indexes ◽  
Quantitative Performance ◽  
The Stability

The control system performance requirement was divided into three parts. They were the stability, rapidity and accuracy. The time-frequency domain analysis in the requirements of three performance were measured through quantitative performance index. The mutual restriction of time-frequency performance and system characteristic parameters of normal second order was discussed. The correlation of system time-frequency performance index was established. The relationship between time-frequency performance indexes in standard two order system was extended to higher order system. The mutually constraining and time-frequency correlation between each performance index was obtained by analysis and calculation. The work had been done above had practical significance to reflect the system dynamic performance in different analytical domains.

Design of Hydraulic Descaling Computer Control System

2014 ◽  
Vol 608-609 ◽  
pp. 19-22
Author(s):  
Ping Xu ◽  
Jian Gang Yi
Keyword(s):  
Control System ◽  
Stability Problem ◽  
Computer Control ◽  
Control Methods ◽  
Computer Control System ◽  
Control Software ◽  
Pressure Water ◽  
Working Principle ◽  
The Stability

Hydraulic descaling system is the key device to ensure the surface quality of billet. However, traditional control methods lead to the stability problem in hydraulic descaling system. To solve the problem, the construction of the hydraulic descaling computer control system is studied, the working principle of the system is analyzed, and the high pressure water bench of hydraulic descaling is designed. Based on it, the corresponding computer control software is developed. The application shows that the designed system is stable in practice, which is helpful for enterprise production.

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