Research on the Designing and Checking Method for Electric Actuator Used on Supersonic Speed Target Cruise Missile

2014 ◽  
Vol 574 ◽  
pp. 633-638
Author(s):  
Dong Xu Zhang ◽  
Jiao Zhang ◽  
Yuan Xiang Liu
Keyword(s):  
Numerical Simulation ◽  
Dynamic Characteristic ◽  
Control Strategy ◽  
Mathematic Model ◽  
Cruise Missile ◽  
Supersonic Speed ◽  
Electric Actuator ◽  
Actual Parameter

According to the control strategy of the supersonic speed target cruise missile and the demand of the actuator, the principle of choosing motor and the method of designing electric actuator were presented. The mathematic model of the electric actuator was built with the actual parameter and the checking method of the dynamic characteristic of the electric actuator was described. With the mathematic model and the actual electric actuator designed, the numerical simulation and the experiment on turret were made. The conclusion showed that the electric actuator designed with the designing and checking method described met the control demand of the target missile.

scholarly journals Strata behavior and control strategy of backfilling collaborate with caving fully-mechanized mining

2020 ◽  
Vol 12 (1) ◽  
pp. 703-717
Author(s):  
Yin Wei ◽  
Wang Jiaqi ◽  
Bai Xiaomin ◽  
Sun Wenjie ◽  
Zhou Zheyuan
Keyword(s):  
Numerical Simulation ◽  
Control Strategy ◽  
Three Dimensional ◽  
Simulation Method ◽  
Mine Pressure ◽  
Hydraulic Support ◽  
Transition Area ◽  
Pressure Concentration ◽  
Strata Behavior ◽  
And Control

AbstractThis article analyzes the technical difficulties in full-section backfill mining and briefly introduces the technical principle and advantages of backfilling combined with caving fully mechanized mining (BCCFM). To reveal the strata behavior law of the BCCFM workface, this work establishes a three-dimensional numerical model and designs a simulation method by dynamically updating the modulus parameter of the filling body. By the analysis of numerical simulation, the following conclusions about strata behavior of the BCCFM workface were drawn. (1) The strata behavior of the BCCFM workface shows significant nonsymmetrical characteristics, and the pressure in the caving section is higher than that in the backfilling section. φ has the greatest influence on the backfilling section and the least influence on the caving section. C has a significant influence on the range of abutment pressure in the backfilling section. (2) There exits the transition area with strong mine pressure of the BCCFM workface. φ and C have significant effect on the degree of pressure concentration but little effect on the influence range of strong mine pressure in the transition area. (3) Under different conditions, the influence range of strong mine pressure is all less than 6 m. This article puts forward a control strategy of mine pressure in the transition area, which is appropriately improving the strength of the transition hydraulic support within the influence range (6 m) in the transition area according to the pressure concentration coefficient. The field measurement value of Ji15-31010 workface was consistent with numerical simulation, which verifies the reliability of control strategy of the BCCFM workface.

scholarly journals Analysis of Atangana–Baleanu fractional-order SEAIR epidemic model with optimal control

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Chernet Tuge Deressa ◽  
Gemechis File Duressa
Keyword(s):  
Numerical Simulation ◽  
Optimal Control ◽  
Fractional Order ◽  
Control Strategy ◽  
Epidemic Model ◽  
Numerical Scheme ◽  
Order Derivative ◽  
Control Analysis ◽  
Fractional Order Derivative ◽  
Fractional Orders

AbstractWe consider a SEAIR epidemic model with Atangana–Baleanu fractional-order derivative. We approximate the solution of the model using the numerical scheme developed by Toufic and Atangana. The numerical simulation corresponding to several fractional orders shows that, as the fractional order reduces from 1, the spread of the endemic grows slower. Optimal control analysis and simulation show that the control strategy designed is operative in reducing the number of cases in different compartments. Moreover, simulating the optimal profile revealed that reducing the fractional-order from 1 leads to the need for quick starting of the application of the designed control strategy at the maximum possible level and maintaining it for the majority of the period of the pandemic.

Modeling and Simulation of Three Phase Photovoltaic Grid-Connected Generation System

2011 ◽  
Vol 347-353 ◽  
pp. 1144-1148
Author(s):  
Jin Yong Lei ◽  
Xu Zhu Dong ◽  
Hong Bin Wu
Keyword(s):  
Control Strategy ◽  
Characteristic Curve ◽  
Mathematic Model ◽  
Photovoltaic Array ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Three Phase ◽  
Loop Feedback ◽  
Power Point ◽  
Feedback Control Strategy

According to the principle of photovoltaic(PV) grid-connected generation, the maximum power point tracking (MPPT) and grid-connected control strategy were presented in this paper. Based on the V-I characteristic curve of photovoltaic array, it built the mathematic model of photovoltaic array and the MPPT algorithm. Through adopting the double-loop feedback control strategy, it achieved the unit power factor control. Lastly, with the example system, it implemented the simulations analysis including the sunlight changing and the temperature changing. The simulation results show that the proposed models and the control strategy are correct.

The Optimal Structure Design of Mold in Powder Injection Molding Based on the Numerical Simulation

2009 ◽  
Vol 16-19 ◽  
pp. 55-59
Author(s):  
Zhen Xing Zheng ◽  
Wei Xia ◽  
Yuan Biao Wu
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Injection Molding ◽  
Mathematic Model ◽  
Structure Design ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Green Is ◽  
Clamp Force

The quality of the green and the shaping efficiency are affected by the mold structure during the course of powder injection molding (PIM). Based on the numerical simulation, the mathematic model for the optimal design of the gating and runner system in PIM mould is constructed. The method is testified by the Moldflow software and the experiment. From the result, it is suggested that the clamp force and the shape cycle are clearly decreased, the green is densified and the samples’ density error of the green is decreased after the optimal design of the mold structure. Furthermore, the number of trial mold is reduced and the shape efficiency is improved.

scholarly journals Lateral control strategy for a hypersonic cruise missile

2017 ◽  
Vol 14 (2) ◽  
pp. 172988141769914 ◽  
Author(s):  
Yonghua Fan ◽  
Pengpeng Yan ◽  
Hongyang Xu ◽  
Fan Wang
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Controller Design ◽  
Roll Angle ◽  
Cruise Missile ◽  
Lateral Motion ◽  
Lateral Control ◽  
Optimal Control Method ◽  
Multiple Input ◽  
Combined Control

Hypersonic cruise missile always adopts the configuration of waverider body with the restraint of scramjet. As a result, the lateral motion exhibits serious coupling, and the controller design of the lateral lateral system cannot be conducted separately for yaw channel and roll channel. A multiple input and multiple output optimal control method with integrators is presented to design the lateral combined control system for hypersonic cruise missile. A hypersonic cruise missile lateral model is linearized as a multiple input and multiple output plant, which is coupled by kinematics and fin deflection between yaw and roll. In lateral combined controller, the integrators are augmented, respectively, into the loop of roll angle and lateral overload to ensure that the commands are tracked with zero steady-state error. Through simulation, the proposed controller demonstrates good performance in tracking the command of roll angle and lateral overload.

scholarly journals Extremum Seeking Based Fault-Tolerant Cooperative Control for Multiagent Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Fu Jiang ◽  
Xiaoyong Zhang ◽  
Wentao Yu ◽  
Heng Li ◽  
Jun Peng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fault Detection ◽  
Multiagent Systems ◽  
Control Strategy ◽  
Cooperative Control ◽  
Fault Tolerant ◽  
Extremum Seeking ◽  
Unknown Input ◽  
Fault Parameter ◽  
Unknown Input Observers

We propose a novel fault-tolerant cooperative control strategy for multiagent systems. A set of unknown input observers for each agent are constructed for fault detection. Then a real-time adaptive extremum seeking algorithm is utilized for adaptive approximation of fault parameter. We prove that the consensus can be still reached by regulating the interconnection weights and changing the connection topology of the fault agent. A numerical simulation example is given to illustrate the feasibility and effectiveness of the proposed method.

PID Control for Magnetorheological Elastomer Absorber with Impact Load

2011 ◽  
Vol 121-126 ◽  
pp. 1734-1738 ◽  
Author(s):  
Jie Fu ◽  
Miao Yu ◽  
Zhi Wei Xing
Keyword(s):  
Numerical Simulation ◽  
Mechanical Property ◽  
Mathematical Model ◽  
Control Strategy ◽  
Pid Control ◽  
Pid Controller ◽  
Impact Load ◽  
Variable Stiffness ◽  
Impact Testing ◽  
Magnetorheological Elastomer

In this paper, a semi-active impact control system, which consists of a new Magnetorehological elastomer (MRE) absorber with variable stiffness, is proposed and its vibration control with impact load is investigated. An impact testing platform is established and mechanical property of fabricated MRE is tested. Based on Newton’s law the appropriate mathematical model of MRE absorber system is established. PID controller for MRE absorber system is designed to reduce the effect of impact load. Finally, the effectiveness of control strategy is verified by numerical simulation.

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