Passenger Car Active Braking System: pressure control design and experimental results (Part II)

نویسندگان

  • Antonio Tota
  • Enrico Galvagno
  • Mauro Velardocchia
  • Alessandro Vigliani
چکیده

This paper deals with the design of a brake caliper pressure controller for a conventional ABS/ESC system and the experimental validation of its tracking performances. The analysis of the hydraulic plant, carried out in Part I of this two-part study, is here utilized to develop the control algorithm for ABS digital electro-hydraulic valves. The control strategy is based on a Feedforward (FF) and a Proportional Integral (PI) controller through a Pulse Width Modulation (PWM) with constant frequency and variable Duty Cycle (DC). FF contribution requires modeling the nonlinear open-loop system behavior which has been experimentally identified and described through 2-D maps: the inputs are the DC applied to the electrovalves and the pressure drop across their orifice, while the output is the pressure gradient in the brake caliper. These maps, obtained for inlet and outlet valves, are used to set the FF term. Finally a PI controller is designed to reject external disturbances and compensate for model uncertainties. A brake system test rig, described in Part I, is used for building inverse maps and validating the proposed control logic. Different reference pressure profiles are used to experimentally verify the control tracking performances. Index Terms braking system, pressure control, chassis control system, ABS control unit.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

DEVELOPMENT OF A DC MOTOR ASSISTED HYDRAULIC BRAKING SYSTEM FOR AUTOMOTIVE USE

ABSTRACT: Deceleration or stopping the vehicle without any diving and lateral acceleration is essential to develop an effective braking system. The hydraulic braking system with intelligent braking called Antilock Braking system (ABS) and Electronic Stability Control (ESC) has been introduced.  However, due to the insufficient human effort, the ABS and ESC to some extent, not function well...

متن کامل

Passenger Car Active Braking System: model and experimental validation (Part I)

The paper proposes a method to characterize the dynamic behavior of a normal production hydraulic brake system through experiments on a hardware-in-the-loop (HIL) test bench for both modeling (Part I) and control (Part II) tasks. The activity is relative to analyze, model and control ABS/ESC digital valves, aiming at obtaining reference tracking and disturbance-rejection performance similar to ...

متن کامل

A Model Based Supervision System for the Hydraulics of Passenger Car Braking Systems

This paper presents the design of a model-based supervision and diagnosis system for hydraulic and future electro-hydraulic passenger car braking systems. A state space model of the braking system has been derived, which allows calculation of the individual wheel brake cylinder pressures as well as the amount of brake fluid consumed due to faults in the braking system. Based on this model, a re...

متن کامل

Multi-objective design optimization for crash safety of a vehicle with a viscoelastic body and wide tapered multi-cell energy absorber using DOE method

Due to the extensive use of cars and progresses in the vehicular industries, it has become necessary to design vehicles with higher levels of safety standards. Development of the computer aided design and analysis techniques has enabled employing well-developed commercial finite-element-based crash simulation computer codes, in recent years. The present study is an attempt to optimize behavi...

متن کامل

Model Based Braking Control with Support by Active Steering

Model based feedback control strategies for electrohydraulic braking and active steering systems in passenger cars are considered. Simulation results with a complex vehicle model and measurements from test drives with a real car are shown for brake control. For a μ-split road surface additional drive dynamics control is required like ESP or active front steering (AFS). Therefore, an AFS feedbac...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2017