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Method for optimally controlling magnetorheological damping of random seismic excitation system

A magneto-rheological damping and optimal control technology, applied in adaptive control, general control system, control/regulation system, etc.

Inactive Publication Date: 2011-09-07
TONGJI UNIV
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Problems solved by technology

The traditional deterministic control and design methods of structural behavior can no longer meet the requirements of structural engineering development, and the stochastic control of structural behavior has attracted more and more attention.

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  • Method for optimally controlling magnetorheological damping of random seismic excitation system
  • Method for optimally controlling magnetorheological damping of random seismic excitation system
  • Method for optimally controlling magnetorheological damping of random seismic excitation system

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0028] 1. Basic framework of physical stochastic optimal control

[0029] Examine stochastic dynamical systems:

[0030] Z · = G ( Z , Θ , t ) , Z(t 0 )=Z 0 (1)

[0031] In the formula: is an n-dimensional state vector; is an n-dimensional operator vector; Θ is a joint probability density function p Θ (θ) random parameter vector.

[0032] For the physical quantity of interest X T = { X i } i = 1 m

[0033] X · = H ...

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Abstract

The invention discloses a method for optimally controlling magnetorheological damping of a random seismic excitation system. In the method, the active optimal control design is carried out by adopting a physical random optimal control strategy with the two-step optimizing character according to a control system with a random seismic excitation structure; the active optimal control grain design iscarried out by adopting a second order statistic evaluation criterion of the system to obtain an optimal control law parameter and thus the target active optimal control force for the design of a magnetorheological damping optimal control system is determined; and by adopting the target active optimal control force realized by tracking as a control criterion, the magnetorheological damping optimal control design is carried out by adopting a delimitation Hrovat semi-active random control strategy. In the invention, on the basis of a probability density evolution theory frame, the hedge of describing the classical random optimal control of a power system by using an Ito random differential equation is broken through; and the method opens up a new path for the active random optimal control.

Description

technical field [0001] The invention belongs to the field of earthquake engineering and relates to a method for optimal control of magnetorheological damping of a random earthquake excitation system. Background technique [0002] The seismic loads acting on engineering structures often have obvious randomness in time, space and size, and the mechanical properties of structural materials generally also have randomness. Therefore, the response behavior of engineering structures under earthquakes shows different degrees of randomness. . Traditional deterministic control and design methods of structural behavior can no longer meet the requirements of structural engineering development, and stochastic control of structural behavior has attracted more and more attention. In recent years, there have been several tentative discussions on stochastic optimal control strategies and methods for magnetorheological damping. For example, Dyke et al. proposed a limited linear quadratic Gau...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 彭勇波李杰
Owner TONGJI UNIV
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