Guidance Method and Schematic Design for Rendezvous and Docking

2021 ◽  
pp. 157-217
Author(s):  
Yongchun Xie ◽  
Changqing Chen ◽  
Tao Liu ◽  
Min Wang
Keyword(s):  
Rendezvous And Docking ◽  
Schematic Design

Intellectual control system for spacecraft rendezvous and docking based on active optical markers and its laboratory prototyping

2015 ◽  
Vol 21 (2(93)) ◽  
pp. 53-55
Author(s):  
V.B. Taranenko ◽  
◽  
R.A. Lymarenko ◽  
V.A. Topolnikov ◽  
V.A. Yatsenko ◽  
...  
Keyword(s):  
Control System ◽  
Intellectual Control ◽  
Optical Markers ◽  
Rendezvous And Docking

STOCHASTIC MODEL PREDICTIVE CONTROL FOR SPACECRAFT RENDEZVOUS AND DOCKING VIA A DISTRIBUTIONALLY ROBUST OPTIMIZATION APPROACH

2021 ◽  
pp. 1-19
Author(s):  
ZUOXUN LI ◽  
KAI ZHANG
Keyword(s):  
Model Predictive Control ◽  
Stochastic Model ◽  
Robust Optimization ◽  
Predictive Control ◽  
Attitude Control ◽  
Optimization Approach ◽  
Distributionally Robust Optimization ◽  
Distributionally Robust ◽  
Stochastic Model Predictive Control ◽  
Rendezvous And Docking

Abstract A stochastic model predictive control (SMPC) algorithm is developed to solve the problem of three-dimensional spacecraft rendezvous and docking with unbounded disturbance. In particular, we only assume that the mean and variance information of the disturbance is available. In other words, the probability density function of the disturbance distribution is not fully known. Obstacle avoidance is considered during the rendezvous phase. Line-of-sight cone, attitude control bandwidth, and thrust direction constraints are considered during the docking phase. A distributionally robust optimization based algorithm is then proposed by reformulating the SMPC problem into a convex optimization problem. Numerical examples show that the proposed method improves the existing model predictive control based strategy and the robust model predictive control based strategy in the presence of disturbance.

scholarly journals Motion Simulator System for Rendezvous and Docking Based on RTX

2019 ◽  
Vol 563 ◽  
pp. 032017
Author(s):  
Hao Liu ◽  
Dezhu Gong ◽  
Tongling Fu ◽  
Huadong He ◽  
Bo Li
Keyword(s):  
Motion Simulator ◽  
Rendezvous And Docking

CEPC Z-pole polarization design studies

2021 ◽  
pp. 2142003
Author(s):  
Wenhao Xia ◽  
Jie Gao ◽  
Yiwei Wang ◽  
Dou Wang
Keyword(s):  
Beam Energy ◽  
Center Of Mass ◽  
Transverse Polarization ◽  
Beam Polarization ◽  
Energy Measurement ◽  
Design Studies ◽  
Electron Positron ◽  
Polarized Beam ◽  
Different Types ◽  
Schematic Design

In this paper, we give preliminary designs of beam polarization manipulations by inserting three different types of insertions in the Circular Electron–Positron Collider (CEPC) at center-of-mass energies of 91 GeV (Z-pole). With the wigglers in the collider ring, we can obtain 5% transverse polarization in 1.1 h for the precise energy measurement. To overcome depolarization effects as the beam energy rises from 10 GeV to 45.5 GeV in the booster ring, Siberian snakes based on helical magnets are adopted. Finally, for longitudinally polarized beam collisions, a schematic design of spin rotators based on solenoids in the collider ring is studied.

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