A low-complexity preset performance control method for spacecraft attitude tracking

Abstract

The invention discloses a spacecraft attitude tracking low-complexity preset property controlling method. The method includes the following steps: firstly establishing a spacecraft attitude tracking motion model, presetting property index design, conducting non-linear mapping on an attitude tracking controlling model, and finally designing a model-free robust controller. According to the invention, the method can control spacecraft attitude tracking if an inertia matrix is unknown and unknown ambient interferences are contained. Since the designed controller does not rely on specific system model and has strong robustness, the model-free control method has more theoretical significance and high potential in engineering. According to the invention, the controller does not require calculation process with high complexities, such as parameter identification and iteration and optimization, and obviates the need for tedious parameter adjustment, so that the designed controller has low complexity. The low-complexity characteristic of the method enables the controller to conduct online calculation and better meet real-time calculation requirements for spatial tasks in nowadays.

Description

【Technical field】 [0001] The invention belongs to the technical field of spacecraft robust control, and relates to a low-complexity preset performance control method for spacecraft attitude tracking. 【Background technique】 [0002] The spacecraft attitude tracking control system is a kind of nonlinear system with multiple inputs and multiple outputs. The characteristics of strong coupling and strong nonlinearity of this system bring great challenges to the high-precision tracking control of spacecraft attitude. In addition to this, a working spacecraft is inevitably subject to uncertainty and various disturbances. Therefore, the design method of nonlinear controller with good robustness and stability is of great significance. [0003] Around the spacecraft attitude tracking control, many scholars have proposed various effective methods. In general, these methods can be divided into the following two categories: The first category is model-related methods, which are also t...

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Problems solved by technology

[0006] Aiming at the shortcomings of the spacecraft model-dependent attitude tracking control method, which have high requirements on system parameters and cannot guarantee the transient and steady-state performance of the attitude tracking process, the present invention provides a spacecraft attitude tracking low-complexity preset performance The control method tries to design a low-complexity controller without prior knowledge or online identification of system parameters, and at the same time, it can ensure that the transient and steady-state performance of the system when tracking the desired attitude can be designed a priori

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