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.

Responses and Optimization of a PID-Based Speed Regulating System of the Planetary Mixer

2011 ◽  
Vol 418-420 ◽  
pp. 1865-1868
Author(s):  
Ming Jin Yang ◽  
Xi Wen Li ◽  
Zhi Gang Wang ◽  
Tie Lin Shi
Keyword(s):  
Control System ◽  
Open Loop ◽  
Open Loop Control ◽  
Efficient Operation ◽  
Loop Control ◽  
Loop Control System ◽  
Response Optimization ◽  
Close Loop Control ◽  
Close Loop Control System

The performance of speed regulating is very important to the mixing process with safe, efficient operation and high quality of production. Strategies and practices of responses and optimization of a PID-based speed regulating system of a planetary mixer were presented in this paper. Research results show that: by means of the signal constraint function presented by Simulink Response Optimization, optimization PID parameters of the 2-DOF-PID controller can be obtained, and the response of close-loop control system has quite good performance of overshoot, response time, and stability compared with an open-loop control system.

Modeling and Simulation of Brushless DC Motor Adaptive Fuzzy PID Control System for Pure Electric Vehicle

2012 ◽  
Vol 466-467 ◽  
pp. 1339-1343 ◽  
Author(s):  
Shu Song ◽  
Ya Jun Zhang
Keyword(s):  
Control System ◽  
Linear Systems ◽  
Mathematic Model ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Loop Control ◽  
Adaptive Fuzzy ◽  
Loop Control System ◽  
Close Loop Control ◽  
Close Loop Control System

Pure Electric Vehicles (PEV) is an important research direction to solve the problems of auto environment and energy sources. Research double close-loop control system of PEV driven by Brushless Direct Current Motor (BLDCM) has the practical value. Traditional PID controllers have some advantages of being simple, reliable and effective for linear systems, but not for time-varying systems or highly non-linear systems. In order to improve the performances in both steady state and transient state of control system, an Adaptive Fuzzy PID Controller (AFPIDC) can be employed. The dynamic model of PEV and the mathematic model of BLDCM can be analyzed and established. Simulation model of Speed and Current Double Close-Loop Control System are implemented by Matlab7.0/simulink. The simulation results show that the system has rapid response, without static error and overshoot, good performance and strong robustness, high capacity of resisting disturbance.

Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials

2009 ◽  
Vol 147-149 ◽  
pp. 512-517 ◽  
Author(s):  
Ewald Macha ◽  
Jacek Slowik ◽  
Roland Pawliczek
Keyword(s):  
Control System ◽  
Laboratory Tests ◽  
Fatigue Behaviour ◽  
Loop Control ◽  
New Energy ◽  
Loop Control System ◽  
Definition Of ◽  
Close Loop Control ◽  
Close Loop Control System

The paper presents a definition of a new energy based parameter which allows to better describe fatigue proprieties of materials, especially cyclically unstable materials in comparison with the Lagoda-Macha parameter. The proposed parameter distinguishes positive and negative work of external force and depends on the sign of the stresses in paths of strain in materials. It is used in laboratory tests for control of a fatigue process on hydraulic stand. A close-loop control system has been equipped with computer program based on MATLAB/Simulink module.

Quasi-Close Loop Control of NC Machine Tools

2014 ◽  
Vol 1061-1062 ◽  
pp. 927-930
Author(s):  
Qian Qian Wang ◽  
Yi Hui Feng ◽  
Yu Lin Wang
Keyword(s):  
Machine Tools ◽  
Open Loop ◽  
Loop System ◽  
Loop Control ◽  
Loop Control System ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Close Loop Control ◽  
Close Loop Control System ◽  
Control Accuracy

There are some problems existing in open loop system with stepping motor as driving motor, such as lower servo precision, without compensation for step losing of stepping motor and so on. This paper presented a new approach called quasi-close loop control. With the help of the method, the control accuracy will be similar to that of close loop system and can be obtained, and the system will have the same stability as that of open loop system. With MCS-51 single-chip microcomputer as control unit and grating scales for measuring displacement, a quasi-close loop control system was built on NC lathe. The practice shows that the quasi-close loop control system has advantages such as high control accuracy, good stability and high cost performance. It is suited to economical NC machine tools and has wide application prospects.

scholarly journals Development of spin coater with close loop control system using ATMega8535 microcontroller

2016 ◽  
Author(s):  
Iqbal Pratama ◽  
Jajat Yuda Mindara ◽  
Dwindra W. Maulana ◽  
C. Panatarani ◽  
I. Made Joni
Keyword(s):  
Control System ◽  
Loop Control ◽  
Loop Control System ◽  
Close Loop Control ◽  
Close Loop Control System ◽  
Spin Coater

A novel method of bead modeling and control for wire and arc additive manufacturing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shangyong Tang ◽  
Guilan Wang ◽  
Hao Song ◽  
Runsheng Li ◽  
Haiou Zhang
Keyword(s):  
Additive Manufacturing ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Bead Geometry ◽  
Content Type ◽  
Loop Control ◽  
Modeling And Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
And Control

Purpose Modeling and control of bead geometry in wire and arc additive manufacturing is significant as it affects the whole manufacturing process. The purpose of this paper is to establish an efficient model to control the bead geometry with fewer experiments in wire and arc additive manufacturing (WAAM). Design/methodology/approach A multi-sensor system is established to monitor the process parameters and measure the bead geometry information. A dynamic parameters experimental method is proposed for rapid modeling without dozens of experiments. A deep learning method is used for bead modeling and control. To adaptively control the bead geometry in real-time, a closed-loop control system was developed based on the bead model and in situ monitoring. Findings A series of experiments were conducted to train, test and verify the feasibility of the method and system, and the results showed that the proposed method can build the bead model rapidly with high precision, and the closed-loop system can control the forming geometry adaptively. Originality/value The proposed modeling method is novel as the experiment number is reduced. The dynamic parameters experimental method is effective with high precision. The closed-loop control system can control the bead geometry in real-time. The forming accuracy is elevated.

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