Simulation Research on the Basic Platform's Automatic Leveling System Based on SimHydraulics

2013 ◽  
Vol 345 ◽  
pp. 99-103 ◽  
Author(s):  
Yong Qing Chen ◽  
Xin He Xu ◽  
Hua Ling Zhu ◽  
Shi De Ye ◽  
Liang Tao Li
Keyword(s):  
Control System ◽  
Steady State ◽  
System Design ◽  
Simulation Study ◽  
Pid Controller ◽  
System Simulation ◽  
Proportional Valve ◽  
Simulation Research ◽  
Adjustment Time ◽  
Simulation Results

Based on the MATLAB/SimHydraulics toolbox, an automatic leveling system controlled by electro-hydraulic proportional valve was simulated and researched. With the help of Hydraulic components models in the SimHydraulics toolbox, the SimHydraulics Physical Network simulation and the Simulink control system simulation was integrated used, and the Simulink modules powerful numerical processing capability helped to improve the efficiency and accuracy of the system design. The simulation results showed that:The use of SimHydraulics toolbox on the simulation study of automatic leveling system controlled by electro-hydraulic proportional valve is feasible; The adjustment time of the automatic leveling system is short and the steady-state accuracy is high based on the PID controller.

Integral Separation PID Control in the Control of Lye Concentration

2012 ◽  
Vol 627 ◽  
pp. 489-493 ◽  
Author(s):  
Liang Huang ◽  
Shi Hai Zhao ◽  
Lin Cui
Keyword(s):  
Control System ◽  
Pid Control ◽  
Pid Controller ◽  
System Simulation ◽  
Dynamic Performance ◽  
Control Performance ◽  
Integral Separation ◽  
Simulation Results

For the requirements of the lye concentration in the mercerizing process, this article is designed for the control of the lye concentration in the integral separation PID controller, the controller is based on conventional PID control, Integral separation, and further improve the performance of the PID controller, improve the accuracy of the lye concentration control system. Simulation results show that: precise characteristics of the controller's existing conventional PID controller, and integral separation PID control system overshoot, improve the dynamic performance of the control system, enables the system to achieve satisfactory control performance.

Controller Optimization of Quadrotor UAV

2014 ◽  
Vol 709 ◽  
pp. 237-240
Author(s):  
Xin Zhao ◽  
Wei Ping Zhao ◽  
Song Xiang
Keyword(s):  
Genetic Algorithm ◽  
Steady State ◽  
Pid Controller ◽  
System Simulation ◽  
Stability Control ◽  
Control Model ◽  
Lateral Stability ◽  
Control Effect ◽  
Quadrotor Uav ◽  
Simulation Results

Adjusting method of traditional PID controller is complicated. The controller obtained by adjusting method of traditional PID may be not optimal. Therefore, present paper utilized the genetic algorithm to optimize the PID controller parameter of roll channel of quadrotor UAV. According to the feature of lateral stability control model of quadrotor UAV, ascend time of system, steady state error, and weighted overshoot are chosen as objective function. In order to obtain the better control effect, penalty function is used to limit the oscillation of system. Simulation results show that PID controller designed by the genetic algorithm possess the excellent flexibility, adaptability and can produce the better control effect.

Design and Simulation Research of Airborne DC Converter

2011 ◽  
Vol 347-353 ◽  
pp. 314-318 ◽  
Author(s):  
Qun Min Yan
Keyword(s):  
Simulation Model ◽  
System Design ◽  
System Simulation ◽  
Power Conversion ◽  
Functional Requirements ◽  
Working Mechanism ◽  
Simulation Research ◽  
Future Design ◽  
Test Circuit ◽  
Simulation Results

Airborne DC converter is the most important secondary aircraft power conversion equipment, analysis of some Airborne DC-DC converter's working mechanism, according to the actual requirements of the system design the converter main circuit. Meanwhile, calculated the logic test circuit parameters, build a simulation model of Airborne DC converter with the saber software, simulated and tested the system, simulation results show that the system design come to the corresponding functional requirements, and finally optimized the system using the results of simulation, and ultimately make the system more reasonable, for the future design of airborne converter provides a useful reference.

scholarly journals Over/Undervoltage and Undervoltage Shift of Hybrid Islanding Detection Method of Distributed Generation

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Manop Yingram ◽  
Suttichai Premrudeepreechacharn
Keyword(s):  
Control System ◽  
Distributed Generation ◽  
Hybrid Method ◽  
Detection Method ◽  
System Simulation ◽  
Detection Methods ◽  
Islanding Detection ◽  
Active Method ◽  
Passive Method ◽  
Simulation Results

The mainly used local islanding detection methods may be classified as active and passive methods. Passive methods do not perturb the system but they have larger nondetection zones, whereas active methods have smaller nondetection zones but they perturb the system. In this paper, a new hybrid method is proposed to solve this problem. An over/undervoltage (passive method) has been used to initiate an undervoltage shift (active method), which changes the undervoltage shift of inverter, when the passive method cannot have a clear discrimination between islanding and other events in the system. Simulation results on MATLAB/SIMULINK show that over/undervoltage and undervoltage shifts of hybrid islanding detection method are very effective because they can determine anti-islanding condition very fast.ΔP/P>38.41% could determine anti-islanding condition within 0.04 s;ΔP/P<-24.39% could determine anti-islanding condition within 0.04 s;-24.39%≤ΔP/P≤ 38.41% could determine anti-islanding condition within 0.08 s. This method perturbed the system, only in the case of-24.39% ≤ΔP/P ≤38.41% at which the control system of inverter injected a signal of undervoltage shift as necessary to check if the occurrence condition was an islanding condition or not.

Integrated Aircraft Modeling Research for Accurate Flight Control System Design

2013 ◽  
Vol 791-793 ◽  
pp. 658-662
Author(s):  
Chao Zhang ◽  
Yi Nan Liu ◽  
Jian Hui Xu
Keyword(s):  
Control System ◽  
System Design ◽  
Flight Control ◽  
Time Delays ◽  
Flight Dynamics ◽  
Control System Design ◽  
Control Law ◽  
Flight Control System ◽  
Aircraft Model ◽  
Simulation Results

In order to realize accurate flight control system design and simulation, an integrated scheme of aircraft model which consists of flight dynamics, fly-by-wire (FBW) platform and flight environment is proposed. Flight environment includes gravity, wind, and atmosphere. And the actuator and sensors such as gyroscope and accelerometer models are considered in the FBW platform. All parts of the integrated model are closely connected and interacted with each other. Simulation results confirm the effectiveness of the integrated aircraft model and also indicate that the (Flight Control Law) FCL must be designed with robustness to sensor noise and time delays with the FBW platform in addition to the required robustness to model uncertainty in flight dynamics.

Constant Palstance Control of Combine Cylinder Based On Nonlinear PID

2012 ◽  
Vol 241-244 ◽  
pp. 1164-1167
Author(s):  
Ming Biao Yu ◽  
De An Zhao ◽  
Jun Zhang
Keyword(s):  
Control System ◽  
Pid Controller ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Control Environment ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Nonlinear Pid Controller ◽  
Simulation Results

Considering that the threshing cylinder palstance system has characteristics of nonlinear, time-delay, what’s more the control environment is very complex and multi-disturbance; this paper presented the method of nonlinear PID to control the cylinder palstance. Firstly, The paper analyzes characteristics of the model of the threshing cylinder palstance system .Then the nonlinear PID controller is designed, and with the threshing cylinder palstance system constitute a closed-loop control system. Finally, simulation results show the effectiveness and feasibility of the proposed method.

Based on Analysis of Fast Simulation Algorithm for Multi-Objective BVR Attacking Fire Control System

2014 ◽  
Vol 898 ◽  
pp. 900-903
Author(s):  
Yi Guo Ji ◽  
Zhong Xiang Tao ◽  
Cui Chen ◽  
Zhi Huan Lan ◽  
Chun Yan Tian
Keyword(s):  
Control System ◽  
System Design ◽  
Continuous Improvement ◽  
Control System Design ◽  
Simulation Algorithm ◽  
Fast Simulation ◽  
Fire Control ◽  
Multi Objective ◽  
Combat Aircraft ◽  
Simulation Results

With the continuous improvement of fire control system functions to further improve the performance of missile weapons, combat aircraft requires BVR combat capability, multi-objective BVRAC will be the next major form of combat and trends. This article will fast simulation algorithm is applied to multi-target attack fire control system design, we propose a multi-target attack BVR fire control system design. Simulation results show that: the design of high precision, calculation speed, fully meet the requirements of real-time speed and airborne weapons systems.

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