Target attitude cooperative planning method and system of multistage composite control of spacecraft

A target attitude and compound control technology, applied in attitude control, space navigation equipment, space navigation aircraft, etc., can solve the problem of unfavorable load ultra-high stability control, load attitude control periodic error fluctuation, load target attitude and target Problems such as obvious non-smooth characteristics of angular velocity

Active Publication Date: 2018-11-06
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0006] 2. It is difficult to achieve the smoothness of the load target attitude and target angular velocity
Since the star controls the period Δt 1 There is a random error dt in the timing accuracy of , which affects the smoothness of the load target attitude and target angular velocity planning
Using the linear interpol...

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  • Target attitude cooperative planning method and system of multistage composite control of spacecraft
  • Target attitude cooperative planning method and system of multistage composite control of spacecraft
  • Target attitude cooperative planning method and system of multistage composite control of spacecraft

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Embodiment Construction

[0091] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0092] The present invention is a method and system for multi-stage composite control of a target attitude collaborative planning of a spacecraft, which is suitable for space-based astronomical observations, extremely high-resolution earth observations, etc., which require ultra-high-precision pointing control of loads, ultra-high stability, and ultra-agile control requirements. field. The designed spacecraft multi-level composite control system includes the first-level control system of the star and the second-level control system of the payload. The payload and the star are required to track the same target attitude during the large-angle agile maneuvering of the spacecraft. Since the star controls the period Δt 1 and load control period Δt 2 Different (Δt 2 ﹤﹤Δt 1 ), it is necessary to use the interpolation method to calculate the loa...

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Abstract

The invention provides a target attitude cooperative planning method and system of multistage composite control of a spacecraft. A designed spacecraft multistage composite control system comprises a star first-stage control system and a load second-stage control system, and a load and a star are required to track the same target attitude in a wide-angle agile maneuvering process of the spacecraft.The control periods of the star are different, the target attitude of the load within the control period deltat2 is calculated by employing an interpolation method in the condition of knowing the target attitude of a star platform. Firstly, a target attitude thetabr in a next control period deltat1 is calculated through a star attitude planning algorithm; then the load calculates a target attitude thetapr of the load within each deltat2 time by employing a Newton interpolation method in the condition of knowing the target attitude thetabr within the deltat1 time; and in the condition of knowing the target attitudes of the star and the load at each time point, the spacecraft multistage composite control system performs attitude control by employing a star and load two-stage PID controllerso that high-stability control of the optical load of the spacecraft is realized.

Description

technical field [0001] The invention belongs to the field of spacecraft attitude control, and relates to a target attitude collaborative planning method and system for realizing multi-level composite control of spacecraft. Background technique [0002] Spacecraft missions such as space-based astronomical observation and extremely high-resolution earth observation have put forward the "three super" control requirements such as ultra-high-precision pointing, ultra-high stability control, and ultra-agile control of optical loads. Traditional spacecraft are limited by factors such as sensor measurement bandwidth and actuator response bandwidth, and it is difficult to meet the "three super" control requirements of optical loads. To solve this problem, a spacecraft multi-level compound control system based on active pointing ultra-quiet platform came into being. In the multi-level composite control system of the spacecraft, the star and the load are connected through a flexible a...

Claims

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Application Information

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IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 关新汤亮王有懿张科备郝仁剑田科丰
Owner BEIJING INST OF CONTROL ENG
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