Adaptive vibrating control method based on sailboard flexible deformation measurement

Abstract

The invention provides a adaptive vibrating control method based on sailboard flexible deformation measurement. The adaptive vibrating control method comprises the following steps: (1) acquiring the deformation displacement of the root, the middle part and the end of a sailboard at the current time; (2) acquiring the attitude angular velocity of a spacecraft at the current time and the expected attitude angular velocity; (3) calculating the deviation of the attitude angular velocity based on the attitude information at the current time; (4) determining the adaptive controlling quantity of the spacecraft according to the deviation of the attitude angular velocity calculated in the step (3) and the quantity obtained in the step (1); and (5) controlling the spacecraft based on the proportional controlling quantity, the differential controlling quantity and the adaptive control quantity determined in the step (4); and turning to the step (1) to circularly operate all the steps at the next time, so as to achieve the adaptive vibrating control of the spacecraft based on the sailboard flexible deformation measurement.

Description

technical field [0001] The invention belongs to the field of spacecraft attitude control, and relates to an adaptive vibration control method based on sailboard flexible deformation measurement. Background technique [0002] Modern spacecraft often have flexible appendages with lightweight structures such as large solar panels. The vibration of the flexible appendage during maneuvering at a large angle of attitude brings great difficulty to the stability of the attitude in a short period of time. Therefore, the vibration control of the sailboard during the rapid maneuvering process is a problem that must be solved. In addition, since it is difficult to accurately know the sailboard mode on the ground, the control parameters cannot be set completely in advance. For the situation where the flexible mode of the sailboard is uncertain, the usual method is to obtain the estimated value of the sailboard mode through ground or on-orbit identification, and then design an adaptive ...

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Problems solved by technology

There are three disadvantages in this approach. First, the separation theorem of adaptive control is established by default for such a complex system.

However, this has not been clearly proved; second, the modal identification algorithm is complex, especially for high-order modal systems, which greatly occupies satellite computing resources

Third, although finite element modeling brings certain convenience in calculation, it sacrifices some dynamic characteristics and cannot accurately describe the dynamic process of the sailboard under sudden changes.

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