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Spacecraft three-super control robust adaptive multistage cooperation method

A robust self-adaptive, spacecraft technology, applied in aerospace vehicles, spacecraft guidance devices, instruments, etc., can solve problems such as the inability to guarantee the rapidity of state quantity convergence and increase energy consumption.

Active Publication Date: 2020-08-18
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The simple PID control algorithm can only achieve gradual stability of the system, and cannot guarantee the rapidity of state quantity convergence; adding feedforward control can increase the speed of attitude tracking error convergence, but it will additionally arouse the vibration of the flexible attachment, which requires active pointing In the control of the ultra-quiet platform, further feedback control is performed on this part of the vibration to increase additional energy consumption

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  • Spacecraft three-super control robust adaptive multistage cooperation method
  • Spacecraft three-super control robust adaptive multistage cooperation method
  • Spacecraft three-super control robust adaptive multistage cooperation method

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Embodiment

[0146]Since 02 = 2,k 3 =0.8 / 2, p=0.5, adaptive rate parameter Γ=1×10 1 , so that the control bandwidth of the system entering the boundary layer δ is less than 1 / 10 of the bandwidth of the load controller, and the damping ratio of the system is about 2, which can ensure that the system is always fully stable during the tracking control process, and there is no overshoot during the tracking process. Tune.

[0147] The star controller and load controller are used to control the multi-level cooperative attitude of the spacecraft, and the steady-state response of the load after the spacecraft maneuvers 30deg is investigated. Figure 3 ~ Figure 6 The attitude control results of the load in the whole 0-200s under the condition of not using and using multi-level cooperative control are given respectively. After statistics, it is found that the convergence time of load attitude before applying multi-level cooperative control is about 100s, and the three-axis attitude accuracy is 1.1...

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Abstract

The invention relates to a spacecraft three-super control robust adaptive multistage cooperation method, which is suitable for astronomical observation and other large satellite platforms with ultrahigh precision, ultrahigh stability and ultrahigh agility for payload attitudes. Different from a traditional PID control algorithm, the robustness characteristic of sliding mode control on a sliding mode surface and the characteristic that self-adaptive control can estimate parameters on line are combined, and star-active pointing ultra-quiet platform two-stage composite control is carried out. Themulti-stage cooperative control thought comprises the steps that (1) an active pointing ultra-static platform is installed between a load and a spacecraft body, and control parameters of the active pointing ultra-static platform are designed according to the quality characteristics of the spacecraft body and the load; and 2) a star robust adaptive controller considering bandwidth constraints is designed by combining ideas of sliding mode control and adaptive control, so that the star controller can be matched with the active pointing ultra-quiet platform to realize three-override control of the load.

Description

technical field [0001] The invention belongs to the field of spacecraft attitude control, and relates to a multi-stage cooperative control method for a large spacecraft system. Background technique [0002] With the increasing demand for astronomical observation and on-orbit services, the design ideas and practices of contemporary large-scale satellite platforms have undergone revolutionary changes, the complexity of satellite control systems has continued to increase, and the attitude accuracy and stability requirements of satellite payloads are also moving towards individual Therefore, it is necessary to carry out research on new control methods with three-super performance for a class of large-scale satellite platforms to meet the attitude requirements of various payloads in the future. Three Super refers to "ultra-high precision, ultra-high stability, and ultra-agility". [0003] In the current traditional spacecraft control system, there is often a rigid connection bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/24B64G1/10G06F30/15G06F30/20G06F119/14
CPCB64G1/10B64G1/244G06F30/15G06F30/20G06F2119/14
Inventor 姚宁袁利汤亮关新王有懿宗红郭子熙张科备郝仁剑冯骁刘昊龚立纲
Owner BEIJING INST OF CONTROL ENG
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