The Modeling and Control Study of VSC-MTDC System

2012 ◽  
Vol 516-517 ◽  
pp. 1453-1458 ◽  
Author(s):  
Peng Ye ◽  
Lin Yuan ◽  
Duo Jiao Guan ◽  
Xing Wei Xu ◽  
Kai Yuan Hou
Keyword(s):  
Reactive Power ◽  
Control Strategies ◽  
Local Mode ◽  
Modeling And Control ◽  
Voltage Controller ◽  
Control Scheme ◽  
Dc Voltage Control ◽  
Set Up ◽  
And Control ◽  
The Mathematical Model

VSC-Multi-Terminal Direct Current(VSC-MTDC) system is much more controllable and economic. In this paper, the mathematical model for the VSC-MTDC system is set up. Base on this model, the multi-terminal constant DC voltage control scheme with an offset component was developed for MTDC system in the distribute network. Decoupling linear PI controllers are applied for the independent control of active and reactive power. Constant DC and AC voltage controller is implemented respectively for source side and loads side for the high quality power supply. Simulation results show that the control scheme is very effective. With the proposed control strategies, dynamic process of the system can be controlled effectively. What is more, the control law is not complex and it is in the local mode. All of these merits make the control strategy very practical.

Passive Pneumatic Teleoperation System

2013 ◽  
Author(s):  
Aly Elmasry ◽  
Matthias Liermann
Keyword(s):  
Transmission Lines ◽  
Force Feedback ◽  
Pressure Control ◽  
Modeling And Control ◽  
Extra Effort ◽  
Physical Connection ◽  
Control Scheme ◽  
Set Up ◽  
And Control ◽  
The Mathematical Model

This paper describes the modeling and control of a pneumatic tele-operation scheme, where the connection of master and slave cylinder is realized signal based but also physically via long transmission lines. The system is called passive because of the passive physical connection, which can also serve as a safety fallback solution. The advantage of this scheme is that a limited force feedback is realized with a minimum of extra effort in comparison to a teleportation system without force feedback. The stiffness of the physical connection is enhanced through a cascaded position and pressure control scheme with two proportional valves as actuators for each pneumatic line. The paper presents the mathematical model of the setup, which is used to determine the relative stability of the dynamic system as a function of control parameters. An experimental setup is presented which was set up to validate the system model. For a distance of 5 m between master and slave cylinder a stiffness of 2.4 N/mm could be established.

NEURAL MODELING AND CONTROL OF DYNAMIC SYSTEMS WITH HYSTERESIS

2007 ◽  
Vol 31 (1) ◽  
pp. 127-141
Author(s):  
Yonghong Tan ◽  
Xinlong Zhao
Keyword(s):  
Dynamic Systems ◽  
Control Strategy ◽  
Neural Modeling ◽  
Modeling And Control ◽  
Control Scheme ◽  
The Neural Networks ◽  
Adaptive Control Strategy ◽  
Set Up ◽  
Modeling Strategy ◽  
And Control

A hysteretic operator is proposed to set up an expanded input space so as to transform the multi-valued mapping of hysteresis to a one-to-one mapping so that the neural networks can be applied to model of the behavior of hysteresis. Based on the proposed neural modeling strategy for hysteresis, a pseudo control scheme is developed to handle the control of nonlinear dynamic systems with hysteresis. A neural estimator is constructed to predict the system residual so that it avoids constructing the inverse model of hysteresis. Thus, the control strategy can be used for the case where the output of hysteresis is unmeasurable directly. Then, the corresponding adaptive control strategy is presented. The application of the novel modeling approach to hysteresis in a piezoelectric actuator is illustrated. Then a numerical example of using the proposed control strategy for a nonlinear system with hysteresis is presented.

scholarly journals Comparative Study of the Grid Side Converter’s Control during a Voltage Dip

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Hind Elaimani ◽  
Ahmed Essadki ◽  
Noureddine Elmouhi ◽  
Rachid Chakib
Keyword(s):  
Reactive Power ◽  
Sliding Mode ◽  
Control Strategies ◽  
Modeling And Control ◽  
Wind Energy Conversion ◽  
Voltage Dip ◽  
Doubly Fed ◽  
Grid Side ◽  
Grid Side Converter ◽  
And Control

The modeling and control of a wind energy conversion system based on the Doubly Fed Induction Generator DFIG is the discussed theme in this paper. The purpose of this system was to control active and reactive power converted; this control is ensured thanks to the control of the two converters. The proposed control strategies are controlled by PI regulators and the sliding mode technique. In the present work a comparison of the robustness of the 2 controls of the grid side converter (GSC) during a voltage dip is shown. The simulation is carried out using the Matlab/Simulink software with a 300 kW generator.

scholarly journals Composite adaptive control of a robotic joint for passive deployment applications

2002 ◽  
Vol 216 (3) ◽  
pp. 275-289
Author(s):  
A V C Reedman ◽  
K Bouazza-Marouf
Keyword(s):  
Adaptive Control ◽  
Control Strategies ◽  
Adaptive Controllers ◽  
Control Scheme ◽  
And Control ◽  
The Mathematical Model ◽  
Composite Adaptive Control ◽  
Single Worm ◽  
Adaptive Control Scheme ◽  
Computed Torque

A composite adaptive control scheme for the control of an actively constrained revolute joint with backlash cancellation is presented in this paper. The drive mechanism consists of two motor-driven worms coupled to a single worm wheel. The mathematical model and control strategies are reviewed. This is followed by the derivation of the composite adaptive controllers. Simulation and experimental results show that the composite adaptive control scheme gives an equivalent performance to a computed-torque algorithm without compromising the mechanism's ability to cancel backlash.

Study on VSC-HVDC Connecting to Passive Network and Its Control Strategies

2014 ◽  
Vol 960-961 ◽  
pp. 1371-1375
Author(s):  
Wei Dong Qu ◽  
Jian Wen Ren ◽  
Xian Chao Liu
Keyword(s):  
Control Strategies ◽  
Simulation Models ◽  
Dc Voltage ◽  
Hvdc System ◽  
Simulink Simulation ◽  
Voltage Controller ◽  
Passive Power ◽  
Passive Network ◽  
Set Up ◽  
The Mathematical Model

The mathematical model VSC-HVDC system in dq reference frame is derived.For the VSC-HVDC system of transmitting power to passive network ,a constant DC voltage is used in the rectifier-side;a constant AC voltage controller is used in the inverter-side.Digital simulation models are set up by MATLAB/Simulink. Simulation results verify that VSC-HVDC has a independent control of active and passive power,and demonstrates superiority of transmitting active and passive power simultaneously when connecting to passive network.

Three-Phase Induction Motor Modeling and Control Based on the EL Equation

2012 ◽  
Vol 622-623 ◽  
pp. 1917-1921
Author(s):  
Hao Xiang ◽  
Jiu He Wang ◽  
Yu Ling Ma ◽  
Dong Ying Yang
Keyword(s):  
Induction Motor ◽  
System Simulation ◽  
Two Phase ◽  
Modeling And Control ◽  
Three Phase ◽  
Simulation Results ◽  
Stator Flux ◽  
Set Up ◽  
And Control ◽  
The Mathematical Model

The Euler-Lagrange (EL) model of the three-phase induction motor is set up based on the mathematical model of the three-phase induction motor in the two-phase static coordinate. The passivity and dissipativity of the three-phase induction motor are studied by EL model. Based on the passivity of induction motor, the passivity-based controller of system is designed with the method of damping injection under the conditions of the stator flux oriented.The system simulation model of the three-phase induction motor is established under MATLAB/Simulink environment. The Simulation results show that the passivity-based controller designed with the method of damping injection under the conditions of the stator flux orientedis feasible.

Dynamic Modeling and Control Techniques for a Quadrotor

2019 ◽  
pp. 20-66
Author(s):  
Heba Elkholy ◽  
Maki K. Habib
Keyword(s):  
Pid Controller ◽  
Degrees Of Freedom ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Simulation Environment ◽  
Modeling And Control ◽  
Controller Gain ◽  
Aerial Vehicle ◽  
And Control ◽  
The Mathematical Model

This chapter presents the detailed dynamic model of a Vertical Take-Off and Landing (VTOL) type Unmanned Aerial Vehicle (UAV) known as the quadrotor. The mathematical model is derived based on Newton Euler formalism. This is followed by the development of a simulation environment on which the developed model is verified. Four control algorithms are developed to control the quadrotor's degrees of freedom: a linear PID controller, Gain Scheduling-based PID controller, nonlinear Sliding Mode, and Backstepping controllers. The performances of these controllers are compared through the developed simulation environment in terms of their dynamic performance, stability, and the effect of possible disturbances.

Dynamics modeling and control of active track tensioning system for tracked vehicle

2019 ◽  
Vol 26 (11-12) ◽  
pp. 989-1000
Author(s):  
Pingxin Wang ◽  
Xiaoting Rui ◽  
Hailong Yu ◽  
Bo Li
Keyword(s):  
Control Strategies ◽  
Stable Range ◽  
Dynamics Modeling ◽  
Modeling And Control ◽  
Flow Equations ◽  
Ground Pressure ◽  
Coupling System ◽  
Hydraulic Mechanism ◽  
And Control ◽  
Peak Value

Track assemblies are widely used to reduce vehicles’ ground pressure and improve their off-road performance. During off-road, the track tension has a significant effect on the performance of the crawler driving system. Previous control strategies only make use of the motions of partial road wheels. This paper develops a logical improvement to govern the motion of the track tensioner by using all road wheels. First, a dynamic model of the hydraulic-mechanism coupling system is established using the transfer matrix method for multibody systems and pressure-flow equations. Then, in order to get the angle of the idler arm, a modeling method of wheel envelope perimeter is developed, which is based on the locations of all wheels. Simulation results indicate that the control system maintains the wheel envelope perimeter almost constant while road wheels swing and decrease the possibility of peel-off and breakage of the track. It alleviates the track repeated stretch and keeps the tension in a stable range to reduce the fatigue damage. The control strategy can effectively reduce the peak value of the upper track tension during a vehicle passing through obstacles. This study suggests that the active track tensioning system can be implemented to improve the driving properties of tracked vehicles.

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