Design method of optimal control force of LQG controller of automobile active suspension bracket

A technology of active suspension and optimal control, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as failure to meet design requirements, non-optimal design control force, etc.

Inactive Publication Date: 2015-12-16
SHANDONG UNIV OF TECH
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the LQG control force obtained by this method can make the vehicle meet the requirements of the current driving conditions, the designed control force is not optimal
With the rapid development of the vehicle industry and the continuous improvement of vehicle speed,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Design method of optimal control force of LQG controller of automobile active suspension bracket
  • Design method of optimal control force of LQG controller of automobile active suspension bracket
  • Design method of optimal control force of LQG controller of automobile active suspension bracket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] specific implementation plan

[0050] The present invention will be further described in detail through an embodiment below.

[0051] The unsprung mass of a single wheel of a vehicle m 1 = 40kg, sprung mass m 2 =320kg, suspension spring stiffness K 2 =20000N / m, tire stiffness K t =200000N / m, suspension limit travel [f d ]=100mm, acceleration of gravity g=9.8m / s 2 , the spatial cut-off frequency n of filtered white noise road surface 0c =0.011m -1 , the LQG control force of the active suspension to be designed is U a . The vehicle running speed v=72km / h required by the active suspension design of the vehicle is designed for the control force of the LQG controller of the active suspension of the vehicle.

[0052] The design method of the optimal control force of the automobile active suspension LQG controller provided by the example of the present invention, its design flow chart is as follows figure 1 As shown, the 1 / 4 vehicle driving vibration model diagram is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention, which belongs to the technical field of the active suspension bracket, relates to a design method of an optimal control force of an LQG controller of an automobile active suspension bracket. On the basis of a one-quarter vehicle driving vibration model, a ride weighting coefficient optimization design simulink simulation model is constructed by using MATLAB/simulink; and optimization designing is carried out to obtain a ride weighting coefficient and an LQG optimal control force by using pavement unevenness displacement as input excitation, tyre dynamic displacement and suspension dynamic deflection as constraint conditions, and root-mean-square value minimization of vertical vibration acceleration of a vehicle body as a design target. According to examples and simulation verification, with the method, an accurate and reliable LQG optimal control force of the active suspension bracket can be obtained; and a reliable optimal control force design method can be provided for the design and control of the active suspension bracket system. Therefore, the design level and product quality of the active suspension bracket system can be improved; the vehicle riding comfort and driving safety are enhanced; and the product design and testing expenses can be reduced.

Description

technical field [0001] The invention relates to an automobile active suspension, in particular to a design method for an optimal control force of an LQG controller of an automobile active suspension. Background technique [0002] Due to its strong applicability, LQG control has been widely used in active suspension systems. Among them, the determination of the optimal control force is the key to the design of LQG controller for vehicle active suspension. However, according to the available information, the design of the optimal control force of the LQG controller for automotive active suspension at home and abroad is mostly based on the designer's tendency to suspension performance, and the LQG control weighting coefficient is initially determined according to experience, and then through multiple In this simulation, the weighting coefficients are gradually adjusted according to the response until a satisfactory output response is obtained, and then the optimal control force...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G05B13/04
Inventor 周长城于曰伟赵雷雷
Owner SHANDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap