Rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method of ESC

An adaptive fuzzy, speed estimation technology, applied in the direction of adaptive control, automatic steering control components, general control systems, etc., can solve the problems of uncertainty, speed change of steering pump, etc., to reduce chattering phenomenon and ensure global gradual progress. The effect of stability

Active Publication Date: 2015-12-02
东台城东科技创业园管理有限公司
View PDF7 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, during the steering process, due to the uncertainty of the E-ECHPS system (such as engine speed fluctuations) and external disturbances (such as random forces on the road surface, side wind), it is transformed into steering pump speed fluctuations and steering wheel angle / torque Jumping, causing the jitter of the ESC control current, resulting in changes in the rotation speed of the steering pump
Therefore, the uncertainty of the system itself and external interference become the main problems of E-ECHPS system control.

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
  • Rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method of ESC
  • Rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method of ESC
  • Rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method of ESC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention will be described in detail below with reference to the accompanying drawings.

[0056] Such as figure 1 As shown, when the engine is at idle speed, the output flow of the steering pump reaches the maximum value, so that the HPS can provide sufficient steering assistance when the vehicle is turning in situ to meet the requirements of steering portability. As the driving speed of the vehicle increases, the rotation speed of the steering pump increases accordingly. figure 1 It can be seen that the theoretical flow Q of the steering pump P and actual flow Q L The difference (that is, the overflow flow) is constantly expanding, which means that the energy wasted by the steering pump is constantly increasing.

[0057] Such as figure 2 As shown, the electromagnetic slip clutch (ESC) is composed of an inner rotor and an outer rotor, wherein a three-phase winding is embedded in the outer rotor, and an excitation winding is embedded in the inner rotor....

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 discloses a rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method of an ESC, and belongs to the field of automobile hydraulic power assisted steering systems. The control method includes the following steps: 1, an outer rotor of the ESC is connected with an engine, an inner rotor of the ESC is connected with a steering pump, and an ESC type electronic control hydraulic steering system is built; 2, a rotating speed signal of the steering pump in the ESC type electric control hydraulic steering system is collected through an ECU; 3, an ESC dynamic equation is built based on the rotating speed in the step 2, wherein a mathematical model of the ESC under the d-q axis is built; and 4, based on the mathematical model in the step 3, a rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode controller is designed. According to the rotating-speed-estimation-based self-adaptive fuzzy and sliding-mode control method, the beneficial effects of self-adaptive fuzzy control and fuzzy sliding-mode control are adopted, satisfied system responses are generated through a dynamic self-adaptive law, interference is obviously eliminated, and buffeting is reduced.

Description

technical field [0001] The invention belongs to the field of automobile hydraulic power steering systems, in particular to an adaptive fuzzy sliding mode control based on speed estimation. Background technique [0002] At present, heavy-duty vehicles (large passenger cars, large trucks, semi-trailer tractors, etc.) generally adopt a hydraulic power steering system (HPS) with a single power assist characteristic. / h), the steering wheel's feedback to the driver's road feeling is obviously weakened, and the driver will feel the vehicle "fluttering", leading to nervousness and misoperation, directly affecting the handling stability and driving safety of the vehicle. The statistical results of the driving process of the car show that more than 80% of the mileage (or time) of the vehicle is in a non-steering state, but the steering pump of the HPS is always running under the direct drive of the engine. The greater the energy loss, the more engine power is wasted. [0003] Elect...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00G05B13/04B62D123/00
Inventor 江浩斌尧骏
Owner 东台城东科技创业园管理有限公司
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