Sliding Variable Structure Control for Attitude of Moving-Mass Hypersonic Vehicles

2013 ◽  
Vol 325-326 ◽  
pp. 1225-1228
Author(s):  
Yu Kun Wang ◽  
Zhen Zhang ◽  
Jian Qin Mao
Keyword(s):  
Dynamic Model ◽  
Variable Structure ◽  
Reasonable Assumption ◽  
Moving Mass ◽  
Structure Control ◽  
Time Scale Separation ◽  
Separation Theory ◽  
Coupling System ◽  
Time Simulation ◽  
Attitude Dynamic

The moving-mass hypersonic attitude dynamic model is a strong nonlinear, multivariable, and strong coupling system. Based on the reasonable assumption, a simplified dynamic model is given. According to the time-scale separation theory, a sliding variable structure controller is designed and implemented for the tracking control of angular velocity and angle at the same time. Simulation results demonstrate the effectiveness of controller.

Synchronization Control of Space Voltage Vector Controlled Multi-PMSM Based on Adjacent Cross-Coupling

2011 ◽  
Vol 383-390 ◽  
pp. 6931-6937 ◽  
Author(s):  
Yong Zhang ◽  
Hua Deng ◽  
Yi Zhang
Keyword(s):  
Permanent Magnet Synchronous Motor ◽  
Cross Coupling ◽  
Variable Structure ◽  
Structure Control ◽  
Speed Controller ◽  
Coupling System ◽  
Coupling Strategy ◽  
Space Voltage Vector ◽  
Integral Sliding Surface ◽  
Exponential Reaching Law

In this paper permanent magnet synchronous motor (PMSM) which is a multi-variable, nonlinear and high coupling system has a good performance adopting the strategy of field-oriented control (FOC) and space vector PWM (SVPWM). Furthermore, multi-PMSM synchronous driving system is established on employing adjacent cross-coupling strategy (ACC). In addition, a variable structure control with an integral sliding surface and exponential reaching law is designed for speed controller. Comparing with traditional PI controlled multi-PMSM system the results illustrate the effectiveness of the proposed control.

Modeling and Variable Structure Control of Autonomous Underwater Vehicles with Moving Mass

2011 ◽  
Vol 130-134 ◽  
pp. 1963-1967 ◽  
Author(s):  
E Zhao ◽  
Bao Wei Song
Keyword(s):  
Control System ◽  
Control Method ◽  
Sliding Mode ◽  
Autonomous Underwater Vehicles ◽  
Tracking Error ◽  
Variable Structure Control ◽  
Variable Structure ◽  
Moving Mass ◽  
Structure Control ◽  
Moving Mass Control

In order to solve the problem of general fins and rudders being lower at low moving speed, the moving mass technical is applied onto AUV, thus to radically solve the weakness of control method with fin and rudder. The space dynamics model of moving mass control is created for AUV. And based on this, the moving mass control system is designed with the sliding mode variable structure control method so as to ensure system tracking error zero convergence. By controlling the moving mass movement with moving mass control system, the attitude of AVU is previously controlled. And simulation result proves that moving mass control system will control the AUV attitude angle precisely and rapidly.

Variable Structure Control for Moving Mass Actuated Reentry Vehicles

2013 ◽  
Vol 303-306 ◽  
pp. 1228-1233
Author(s):  
Man Yao
Keyword(s):  
Control Method ◽  
Variable Structure Control ◽  
Variable Structure ◽  
Dynamic Equations ◽  
Moving Mass ◽  
Channel Stability ◽  
Reentry Vehicle ◽  
Structure Control ◽  
Linear Dynamic ◽  
Longitudinal Plane

Dynamic equations of an axisymmetric moving mass actuated reentry vehicle, which was in the state of tri-channel stability, were derived in this paper, and the linear dynamic equations in longitudinal plane were obtained. Then variable structure control method was applied to control the moving mass actuated reentry vehicle. The simulation results indicate that the controller is of satisfactory performances in the nonlinear system.

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