A method of the control coefficient range of the unknown system of the parameter

Abstract

The invention relates to a method for determining the control coefficient range of a system with unknown parameters. According to the type of the controlled object, the dynamic equation of the controlled object is determined; and the minimum time constant T of the controlled object is obtained. min ; Select the sampling period T to satisfy the static gain G(0) of the controlled object, and determine its upper bound G max ; Determine the control coefficient β j , the range of the control coefficient given by the present invention can be applied to various control design problems, reduces the difficulty of adjusting the control law in engineering, and has good versatility.

Description

technical field [0001] The invention relates to a method for determining the range of control coefficients of a system with unknown parameters, belonging to the field of aerospace. Background technique [0002] With the gradual development of space technology, the tasks undertaken by spacecraft are becoming more and more complex, which leads to more complex structure and operating environment of spacecraft. Many tasks are completed with flexible attachments. For complex spacecraft with flexible attachments such as large antennas and liquid sloshing, the dynamics are characterized by strong uncertainty and strong nonlinear coupling. For hypersonic vehicles flying in close space, the flight environment is complex, and the aerodynamic coefficients are difficult to measure accurately. These problems lead to uncertainties and even unknown dynamic parameters of the spacecraft. [0003] For systems with unknown parameters, the range of control coefficients is very important for t...

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Problems solved by technology

For hypersonic vehicles flying in close space, the flight environment is complex, and the aerodynamic coefficients are difficult to measure accurately

These problems all lead to uncertainty in the dynamic parameters of the spacecraft, even unknown

[0003] For systems with unknown parameters, the range of control coefficients is very important for the design of control laws, but it is also difficult to determine

In the adaptive control method based on the characteristic model, based on the relationship between the coefficient of the continuous system dynamics discretization equation and the sampling period, the range of the coefficient can be determined by selecting the sampling period, but the range of the control coefficient is difficult to determine, that is, the control The range of coefficients is also one of the difficulties of characteristic model theory

At present, for systems with unknown parameters, there is no method to determine the range of control coefficients

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