Research on dynamic model and control strategy of lead-acid battery

2019 ◽  
Author(s):  
Haowen Luo ◽  
Yu Zhang ◽  
Quan Lu
Keyword(s):  
Dynamic Model ◽  
Control Strategy ◽  
Lead Acid Battery ◽  
And Control ◽  
Lead Acid

Dynamic and Control Strategy of Payload Motion for Deployment System

2012 ◽  
Vol 229-231 ◽  
pp. 2361-2364 ◽  
Author(s):  
Zi Fan Fang ◽  
Bing Fei Xiang ◽  
Qing Song He ◽  
De Xin Wu ◽  
Hua Pan Xiao
Keyword(s):  
Finite Element Method ◽  
Dynamic Model ◽  
Control Strategy ◽  
Wire Rope ◽  
Tension Control ◽  
Analysis Software ◽  
Collaborative Simulation ◽  
Body Dynamics ◽  
Multi Body ◽  
And Control

The dynamic model of wire rope with contact is presented based on finite element method and the flexible multi-body dynamics theory by putting the contact force between the wire rope and drum. The unilateral anti-sway and tension control strategy is put forward, and the dynamic model and collaborative simulation of payload motion for deployment system is modeled by dynamic analysis software RecurDyn and control library Colink. The correctness of the collaborative simulation model and control strategy is validated by analysis and comparison , which lays the foundation for further research on dynamic simulation of virtual prototype in nonlinear and complex mechanical-control system.

Modeling, Analysis, and Control of SLIP Running on Dynamic Platforms

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Amir Iqbal ◽  
Zhu Mao ◽  
Yan Gu
Keyword(s):  
Rigid Body ◽  
Dynamic Model ◽  
Control Strategy ◽  
Initial Conditions ◽  
Legged Locomotion ◽  
Force Model ◽  
Slip Model ◽  
Modeling Analysis ◽  
And Control ◽  
Slip Motion

Abstract The complex dynamic behaviors of legged locomotion on stationary terrain have been extensively analyzed using a simplified dynamic model called the spring-loaded inverted pendulum (SLIP) model. However, legged locomotion on dynamic platforms has not been thoroughly investigated even by using a simplified dynamic model such as SLIP. In this paper, we present the modeling, analysis, and control of a SLIP model running on dynamic platforms. Three types of dynamic platforms are considered: (a) a sinusoidally excited rigid-body platform; (b) a spring-supported rigid-body platform; and (c) an Euler–Bernoulli beam. These platforms capture some important domains of real-world locomotion terrain (e.g., harmonically excited platforms, suspended floors, and bridges). The interaction force model and the equations of motion of the SLIP-platform systems are derived. Numerical simulations of SLIP running on the three types of dynamic platforms reveal that the platform movement can destabilize the SLIP even when the initial conditions of the SLIP motion are within the domain of attraction of its motion on flat, stationary platforms. A simple control strategy that can sustain the forward motion of a SLIP on dynamic platforms is then synthesized. The effectiveness of the proposed control strategy in sustaining SLIP motion on dynamic platforms is validated through simulations.

Dynamic Analysis and Control Research of a 3-DOF Hydraulic Driven Parallel Mechanism

2020 ◽  
Vol 13 (2) ◽  
pp. 156-170
Author(s):  
Bing Zhang ◽  
Saike Jiang ◽  
Ziliang Jiang ◽  
Jiandong Li ◽  
Kehong Zhou ◽  
...  
Keyword(s):  
Control System ◽  
Dynamic Model ◽  
Control Strategy ◽  
Parallel Mechanism ◽  
Control Method ◽  
Simulation Method ◽  
Euler Method ◽  
Parallel Mechanisms ◽  
Rigid Body Dynamic ◽  
And Control

Background: The parallel mechanism is widely used in motion simulators, parallel machine tools, medical equipment and other fields. It has advantages of high rigidity, stable structure and high carrying capacity. However, the control strategy and control method are difficult to study because of the complexity of the parallel mechanism system. Objective: The purpose of this paper was to verify the dynamic model of a hydraulic driven 3-DOF parallel mechanism and propose a compound control strategy to broaden the bandwidth of the control system. Methods: The single rigid body dynamic model of the parallel mechanism was established by the Newton Euler method. The feed forward control strategy based on joint space control with inverse kinematic was designed to improve the bandwidth and control precision. The co-simulation method based on MATLAB / SIMULINK and ADAMS was adopted to verify the dynamics and control strategy. Results: The bandwidth of each degree of freedom in the 3-DOF parallel mechanism was used to expand about 10Hz and the amplitude error was controlled below 5%. Conclusion: Based on the designed dynamic model and composite control strategy, the controlled accuracy of the parallel mechanism is improved and the bandwidth of the control system is broadened. Furthermore, the improvements can be made in aspects of control accuracy and real-time performance to compose more patents on parallel mechanisms.

Modeling and control strategy of HPS electronic ballast considering the dynamic model of the lamp

2011 ◽  
Author(s):  
Andre L. Kirsten ◽  
Jacson Hansen ◽  
Paulo C. V. da Luz ◽  
Cassiano Rech ◽  
Ricardo N. do Prado ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Control Strategy ◽  
Modeling And Control ◽  
Electronic Ballast ◽  
And Control

scholarly journals Analysis of Dynamic Characteristics and Control Strategies of a Solvent Dehydration Distillation Column in a Purified Terephthalic Acid Plant

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 125
Author(s):  
Xiuhui Huang ◽  
Jun Wang ◽  
Zeqiu Li
Keyword(s):  
Sensitivity Analysis ◽  
Dynamic Model ◽  
Control Strategy ◽  
Terephthalic Acid ◽  
Control Strategies ◽  
Plate Temperature ◽  
Dynamic Sensitivity ◽  
Purified Terephthalic Acid ◽  
And Control ◽  
Dynamic Sensitivity Analysis

In this study, a solvent dehydration column of purified terephthalic acid (PTA) plant was used as the research object. Based on a dynamic model of the solvent dehydration column, a dynamic sensitivity analysis of the key parameters was carried out using Aspen Dynamics. After the dynamic model reached stability, the reflux rate, methyl acetate concentration, and reflux temperature of the solvent dehydration column were adjusted and the changes of the key separation indexes under the corresponding disturbance were analyzed. According to the analysis results, a sensitive plate temperature controller was added to carry out the dynamic sensitivity analysis. In addition, the acetic acid (HAc) concentration of the bottom of the column was found to be unstable in the dynamic sensitivity analysis. Considering the HAc concentration controller of the column bottom, two control strategies were designed. By analyzing the dynamic response of the feed flow disturbance under different control strategies, a more suitable control strategy under different conditions was obtained. From this, a reasonable method could be derived to design the control strategy, thereby providing a theoretical basis for further real-time optimization and advanced control of solvent dehydration in a PTA plant.

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