A composite control scheme for attitude maneuvering and elastic mode stabilization of flexible spacecraft with measurable output feedback

2009 ◽  
Vol 13 (2-3) ◽  
pp. 81-91 ◽  
Author(s):  
Qinglei Hu
Keyword(s):  
Output Feedback ◽  
Flexible Spacecraft ◽  
Elastic Mode ◽  
Composite Control ◽  
Control Scheme ◽  
Composite Control Scheme ◽  
Mode Stabilization

Research on the Composite Control Scheme for the Stabilized Loop of Inertial Stabilized Platform

2014 ◽  
Vol 621 ◽  
pp. 209-214
Author(s):  
Hong Bo Liao ◽  
Shi Xun Fan ◽  
Mo Hei ◽  
Da Peng Fan
Keyword(s):  
Control Structure ◽  
Control Method ◽  
Friction Torque ◽  
Experimental Setup ◽  
Sensor Noise ◽  
Composite Control ◽  
Control Scheme ◽  
Stabilized Platform ◽  
Composite Control Scheme ◽  
Peak Value

A composite control scheme is proposed to solve the problems of friction toque and carrier disturbance lag in the stabilized loop of inertial stabilized platform. Based on analysis of composite control structure, the performance of single rate loop, double rate loop and composite control in the inhibition of carrier disturbance, friction torque and sensor noise are compared. In order to further verify the composite control method, an experimental setup is built. The experimental results show that: when the disturbance is 1deg-1Hz sinusoidal signal, the peak value of residual error of the single rate loop is 0.055 deg, the double rate loop is 0.031deg, and the composite control is the 0.0188deg, so the performance of isolation carrier disturbance of platform is effectively improved.

scholarly journals A Look-Up Table Based Fractional Order Composite Controller Synthesis Method for the PMSM Speed Servo System

2022 ◽  
Vol 6 (1) ◽  
pp. 47
Author(s):  
Weijia Zheng ◽  
Runquan Huang ◽  
Ying Luo ◽  
YangQuan Chen ◽  
Xiaohong Wang ◽  
...  
Keyword(s):  
Fractional Order ◽  
Synthesis Method ◽  
Differential Evolution Algorithm ◽  
Servo System ◽  
Step Response ◽  
Parametric Uncertainties ◽  
Composite Control ◽  
Look Up Table ◽  
Control Scheme ◽  
Composite Control Scheme

Considering the performance requirements in actual applications, a look-up table based fractional order composite control scheme for the permanent magnet synchronous motor speed servo system is proposed. Firstly, an extended state observer based compensation scheme was adopted to suppress the motor parametric uncertainties and convert the speed servo plant into a double-integrator model. Then, a fractional order proportional-derivative (PDμ) controller was adopted as the speed controller to provide the optimal step response performance for the servo system. A universal look-up table was established to estimate the derivative order of the PDμ controller, according to the optimal samples collected by an improved differential evolution algorithm. With the look-up table, the optimal PDμ controller can be tuned analytically. Simulation and experimental results show that the servo system using the composite control scheme can achieve optimal tracking performance and has robustness to the motor parametric uncertainties and disturbance torques.

Extended state observer–based output feedback control for spacecraft pose tracking with control input saturation

2021 ◽  
pp. 095441002110177
Author(s):  
Kejie Gong ◽  
Ying Liao ◽  
Yafei Mei
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Finite Time ◽  
Output Feedback Control ◽  
State Observer ◽  
Extended State Observer ◽  
Control Input ◽  
Extended State ◽  
Pose Tracking ◽  
Control Scheme

This article proposed an extended state observer (ESO)–based output feedback control scheme for rigid spacecraft pose tracking without velocity feedback, which accounts for inertial uncertainties, external disturbances, and control input constraints. In this research, the 6-DOF tracking error dynamics is described by the exponential coordinates on SE(3). A novel continuous finite-time ESO is proposed to estimate the velocity information and the compound disturbance, and the estimations are utilized in the control law design. The ESO ensures a finite-time uniform ultimately bounded stability of the observation states, which is proved utilizing the homogeneity method. A non-singular finite-time terminal sliding mode controller based on super-twisting technology is proposed, which would drive spacecraft tracking the desired states. The other two observer-based controllers are also proposed for comparison. The superiorities of the proposed control scheme are demonstrated by theory analyses and numerical simulations.

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