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Passive fault-tolerant control method of automotive active suspension

A technology of active suspension and fault-tolerant control, applied in the direction of suspension, elastic suspension, vehicle components, etc.

Inactive Publication Date: 2017-05-17
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively few studies on passive fault-tolerant control research on sensor faults, actuator faults, and considering the uncertainty of suspension parameters in automotive active suspensions.

Method used

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  • Passive fault-tolerant control method of automotive active suspension
  • Passive fault-tolerant control method of automotive active suspension
  • Passive fault-tolerant control method of automotive active suspension

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0188] In Example 1, the state of the active suspension is normal, there is no perturbation, and the front and rear actuators have no fault gain loss. At this time, the passive suspension, H 2 / H ∞ The performance output comparison of the active suspension controlled by state feedback and the active suspension controlled by passive fault tolerance is as follows: Figure 1-6 shown.

example 2

[0189] Example 2, fault 1, active suspension parameter perturbation 20%, gain loss of front and rear actuators are both 0.6. Then the passive suspension, H 2 / H ∞ The performance output comparison of the active suspension controlled by state feedback and the active suspension controlled by passive fault tolerance is as follows: Figure 7-12 shown.

[0190] Simulation result analysis

[0191] For the normal suspension in Example 1, from the time-domain graph of the vertical acceleration of the vehicle body, the active suspension at H 2 / H ∞ The effect of state feedback control and passive fault-tolerant control is better than that of passive suspension, and the optimization effect is significant; the effect of passive fault-tolerant control is better than that of H 2 / H ∞ State Feedback Control. Judging from the frequency response of the vertical acceleration of the vehicle body relative to the road surface input, the optimization effect of the front and rear wheel input...

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Abstract

The invention provides a passive fault-tolerant control method of an automotive active suspension and relates to the technical field of automobile suspension control. The fault pre-considered passive fault-tolerant control method of the automotive active suspension is offline designed by using the active suspension of the automobile as the research object, combining the shortcomings or defects existing during completed fault-free component and part based research by combining current automotive active suspension control based on a fault-tolerant control theory, using the reliability and usage quality improvement of automotive active suspension control and suspension design method optimization as targets, avoiding parameter perturbation and actuator faults of the automotive active suspension and meanwhile considering time-domain hard constraints of a suspension system. The passive fault-tolerant control method can ensure the stability and safety of the active suspension system, and the taking comfort and control stability of an automobile are improved.

Description

technical field [0001] The invention relates to the technical field of automobile suspension control, in particular to a passive fault-tolerant control method of an automobile active suspension. Background technique [0002] Fault-tolerant control is a fault-tolerant technology of the system, that is, when one or more key parts of the system in the working state fail or make errors, the system can automatically detect and diagnose, and can take corresponding measures to ensure that its specified functions or failures are maintained. Technology that maintains its functionality within acceptable limits. According to different fault-tolerant methods, fault-tolerant control can be divided into passive fault-tolerant control and active fault-tolerant control. The starting point of passive fault-tolerant control design is to reduce the dependence of the system on the operation of individual components, even in the case of failure and no correction function, the system can still w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/0185
CPCB60G17/0185B60G2600/08Y02T10/40
Inventor 张丽萍弓栋梁
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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