Study on Attitude Control of a Cabin-Suspended Catamaran by Using a Double-Loop Control System

2019 ◽  
Author(s):  
Jialin Han ◽  
Sota Kanno ◽  
Akito Mochizuki ◽  
Daisuke Kitazawa ◽  
Teruo Maeda ◽  
...  
Keyword(s):  
Control System ◽  
Attitude Control ◽  
Open Loop ◽  
Bench Test ◽  
Double Loop ◽  
Rotational Angle ◽  
Loop Control ◽  
Small Vessels ◽  
Head Waves ◽  
Loop Control System

Abstract A series of cabin-suspended ships, named Wave Harmonizer, has been developed since 2008. The model ship consists of cabin part, hull part and conjunction part which is mounted in-between the cabin and the hull. The possibility and feasibility of introducing suspensions into small vessels are investigated. Effectiveness evaluations are made in two aspects: motion reduction of the cabin and wave energy harvesting through the oscillating cabin. According to the research results obtained in 2015 and 2016, it was found that the deck of the cabin may bear obvious inclination while weights were loading or unloading from it. Moreover, in relative long waves, the effectiveness of the motion reduction of the skyhook controller was insufficient. To solve those problems, an attitude control strategy is proposed. It is adopted as an outer-loop of the existing controller. Inclination sensors are employed to collect the rotational angle of the cabin in terms of pitch and roll. After finishing the design and construction of the double-loop control system, open loop tests are carried out in dry and wet conditions. The chain mechanism of the ship is investigated. Then a bench test is operated to validate the control concept and performance of the double-loop control system. Finally, tank tests are implemented to examine the inclination reduction of the cabin at regular head waves. In this paper, the development of the double-loop control system is described, experimental results are demonstrated with respect to the heave and pitch motion reduction of the cabin at the condition of with/without the outer control loop. It shows that the inclination reduction at the loading/unloading condition and the walking-on-deck condition are significant. However, in waves the effectiveness is not clearly verified. It suggests that the influence of the apparent gravity on the inclination measurement in waves should be investigated and solutions to accurately detect the inclination of the cabin should be sought.

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.

Research and Design of Control System for a 3-DOF Hybrid Robot

2010 ◽  
Vol 43 ◽  
pp. 207-210 ◽  
Author(s):  
Ju Li ◽  
Hui Ping Shen ◽  
Y.X. Jiang ◽  
Jia Ming Deng ◽  
Shan Shu Liu ◽  
...  
Keyword(s):  
Control System ◽  
Low Cost ◽  
Hybrid Structure ◽  
Open Loop ◽  
The Body ◽  
Step Motor ◽  
Parallel Structure ◽  
Loop Control ◽  
Loop Control System ◽  
Research And Design

This paper studied a novel 3-DOF hybrid robot, and invented a new hybrid structure which was composed of 2-DOF parallel structure and 1-DOF serial structure. The structure of this mechanism was simple, stiffness and positioning accuracy was high. The control system based on ARM micro-controller was a step motor open-loop control system, which features compact and low cost while the control accuracy can be guaranteed. In this paper, the body composition of the robot was described, and its inverse kinematics were derived and further simplified. Hardware and software of the motion control system was designed in detail and experimented through prototype.

The Design of Spraying Manipulator Control System in Mines

2014 ◽  
Vol 602-605 ◽  
pp. 1157-1160
Author(s):  
Mei Yu ◽  
Guo Wei Liu ◽  
Bing Kong
Keyword(s):  
Control System ◽  
Position Control ◽  
Low Cost ◽  
Open Loop ◽  
Open Loop Control ◽  
Mining Equipment ◽  
Loop Control ◽  
Precise Position ◽  
Loop Control System ◽  
Manipulator Control

In view of the present mining spraying manipulator operation is not flexible ,spraying effect is poor, susceptible to interference and other issues, this paper studies and realizes a kind of low cost, strong practicability of spraying manipulator control system. Using S7-200PLC and 2MA860H drive to control the 86BYG250A stepper motor open-loop control system, and the precise position control is realized. By controlling of the x-y axis mine spraying manipulator. Validate the system operation is simple, highly efficient and stable, energy conservation and environmental protection, strong anti-jamming capability, it can be widely used in all kinds of mining equipment.

Experimental Study of Landing Gear Simulation Test-Bed

2014 ◽  
Vol 1030-1032 ◽  
pp. 1181-1184
Author(s):  
Miao Shang ◽  
Guo Min Lin ◽  
Wen Guang Zhang ◽  
Fei Zhou
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Test System ◽  
Open Loop ◽  
Landing Gear ◽  
Test Bed ◽  
Simulation Test ◽  
Loop Control ◽  
System Experiment ◽  
Loop Control System

The basic composition of the landing gear simulator test-bed is discussed; The open loop control system experiment, closed-loop light control system experiment, the closed loop load control system are completed for the test system; The reliability and stability of test-bed system are validated by the experiment; The technical indexes of the landing gear simulation test-bed and the design requirement of electric control system are validated.

A standing wave ultrasonic stepping motor using open-loop control system

Ultrasonics ◽  
2018 ◽  
Vol 82 ◽  
pp. 327-330 ◽  
Author(s):  
Xiaoxiao Dong ◽  
Minqiang Hu ◽  
Long Jin ◽  
Zhike Xu ◽  
Chunrong Jiang
Keyword(s):  
Control System ◽  
Standing Wave ◽  
Open Loop ◽  
Stepping Motor ◽  
Open Loop Control ◽  
Loop Control ◽  
Loop Control System

scholarly journals The research of the pulse oxygen supply based on the fuzzy control technology

2018 ◽  
Vol 189 ◽  
pp. 06012
Author(s):  
Faling Hu ◽  
Tongfeng Niu ◽  
Jun Yao ◽  
Bingyan Cui ◽  
Haoxing Xu ◽  
...  
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Open Loop ◽  
Open Loop Control ◽  
Loop Control ◽  
Fuzzy Control System ◽  
Loop Control System ◽  
Working Principle ◽  
The Stability ◽  
Close Loop Control

According to the working principle of pulse oxygen supplies, we analyze how to realize the control of the oxygen flow by double different valves. a two-dimensional fuzzy control system is proposed to solve the unstable problem, which is brought by the shortcomings of the open-loop control system. We add a new parameter, the rate of the differential pressure signal changes, which contributes to a close –loop control system and increases the stability of the system. The experiments and the data show that the fuzzy control system make the process of breathing much more comfortable and solve the hysteresis and overshoot caused by the open-loop control system. The product reliability has been greatly improved.

Modeling and Simulation of PMSM Double-Loop Control System Based on Matlab/Simulink

2014 ◽  
Vol 602-605 ◽  
pp. 983-988
Author(s):  
Wei Liu
Keyword(s):  
Control System ◽  
Simulation Model ◽  
Functional Module ◽  
Double Loop ◽  
Matlab Simulink ◽  
Loop Control ◽  
Dynamic Tracking ◽  
Structures And Properties ◽  
Loop Control System ◽  
Simulation Results

A double-loop control system simulation model is created in Matlab/Simulink based on mathematical model of PMSM, as well, the structures and properties of each functional module are introduced in detail. The simulation results prove that the model was effective and it had good steady-state and dynamic tracking performance. Finally, experiments were carried out to prove the validity of the simulation model in the development of practical engineering.This model provides an effective auxiliary method for theoretical analysis and engineering design of PMSM double-loop control system.

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