Active suspension system control method based on beneficial disturbance, coupling and nonlinearity

A technology of active suspension and control method, applied in elastic suspension, suspension, transportation and packaging, etc., can solve the problems of system parameter/model uncertainty, incomplete state coupling, no control method, etc., to achieve good tracking Control performance and stability performance, improve robustness, eliminate the effect of state coupling effects

Pending Publication Date: 2022-08-09
景兴建
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In summary, the existing control methods mentioned above are not perfect in solving the uncertainties of system parameters / models, state coupling and inherent nonlinear factors, and there is no control method that can solve these problems at the same time

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  • Active suspension system control method based on beneficial disturbance, coupling and nonlinearity
  • Active suspension system control method based on beneficial disturbance, coupling and nonlinearity
  • Active suspension system control method based on beneficial disturbance, coupling and nonlinearity

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Embodiment 1

[0066] This embodiment provides an energy-saving and robust control method for an active suspension system based on beneficial disturbance, coupling and nonlinearity. Different from existing control methods, this embodiment considers robustness, disturbance, inherent nonlinear factors, For problems such as state coupling effect and energy consumption, make full use of nonlinear stiffness and damping effects to construct a bionic nonlinear reference model, and accurately estimate the set including parameter uncertainty, unmodeled dynamic uncertainty and external disturbance through fuzzy disturbance observer. Disturbance; design state coupling effect index and disturbance effect index, and judge the influence of state coupling and disturbance factors; finally, Lyapunov theorem is used to ensure the asymptotic stability of active suspension system. It has good transient response characteristics and significant energy saving effect.

[0067] Specifically include the following ste...

Embodiment 2

[0247] This embodiment provides an active suspension system control system based on beneficial disturbance, coupling and nonlinearity, including:

[0248] a model building module configured to construct a bionic nonlinear reference model of the active suspension system, using the output of the bionic nonlinear reference model as a desired trajectory;

[0249] a disturbance estimation module configured to construct a fuzzy disturbance observer to estimate ensemble disturbances in the biomimetic nonlinear reference model;

[0250] The tracking control module is configured to define a state coupling effect index and a disturbance effect index, and judge whether the state coupling and ensemble disturbance in the bionic nonlinear reference model are beneficial according to the two effect indexes, thereby constructing a tracking considering the beneficial state coupling and the beneficial disturbance A controller to cause the suspension travel of the active suspension system to foll...

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Abstract

The invention discloses an active suspension system control method based on beneficial disturbance, coupling and nonlinearity, and the method comprises the steps: constructing a bionic nonlinear reference model of an active suspension system, and taking the output of the bionic nonlinear reference model as an expected trajectory; constructing a fuzzy disturbance observer to estimate set disturbance in the bionic nonlinear reference model; and defining a state coupling effect index and a disturbance effect index, and judging whether state coupling and set disturbance in the bionic nonlinear reference model are beneficial according to the two effect indexes so as to construct a tracking controller considering beneficial state coupling and beneficial disturbance, so that the suspension stroke of the active suspension system tracks an expected trajectory. On the basis of evaluating potential influences of state coupling, disturbance and nonlinear factors on the system, a robust tracking control method is designed, only negative influences of the coupling, disturbance and nonlinear factors are restrained, positive influences are reserved, and influences of disturbance, state coupling and inherent nonlinearity of the system are effectively dealt with.

Description

technical field [0001] The invention relates to the technical field of active suspension system tracking control, in particular to an active suspension system control method based on beneficial disturbance, coupling and nonlinearity. Background technique [0002] As one of the key components of the vehicle chassis, the vehicle suspension system has an important impact on the ride comfort, stability and road handling of the vehicle. Compared with traditional suspension systems, active suspension systems have better vibration isolation performance when the vehicle encounters irregular road surfaces. Therefore, for the active suspension system, researchers have designed a series of control methods to improve the performance of the suspension system, mainly including linear control methods and nonlinear control methods. [0003] Active suspension systems have the following common problems in practical applications, such as unavoidable disturbances (parameter uncertainty, uncert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/015B60G17/018
CPCB60G17/015B60G17/0182B60G2600/182B60G2800/91Y02T90/00
Inventor 景兴建张梦华
Owner 景兴建
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