Electronic Stability Program Control Research Articles

Integrated control of electronic stability program and active suspension system using a priority-weighting mechanism

This paper presents a novel vehicle dynamic controller for coordinating the Electronic Stability Program (ESP) and active suspension system (ASS) to improve the directional performance and roll stability of the vehicle. The controller consists of two levels. The upper level is responsible for monitoring system status, determining control objectives, and distributing the active forces. Also, a priority-weighting mechanism is proposed for model predictive control to generate an adaptive multi-objective cost function. Then, the distribution of active forces is obtained by solving a centralized optimization problem. In the lower level, the dynamics of the suspension actuators are taken into consideration in the control of suspension forces for the ASS, and the desired braking forces are achieved through braking torque control for the ESP. The effectiveness of the proposed controller is verified through numerical simulation by using a nonlinear full vehicle model. The simulation results show that the proposed dynamic controller can significantly improve the yaw and roll performance of the vehicle.

Coordinated control of a semi-active suspension system and an electronic stability program on a finite-state basis

Considering the different effective working areas corresponding to respective functions of semi-active suspension systems (SASS) and electronic stability program (ESP) subsystems, the coordinated control of SASS and ESP based on the basis of finite-state is proposed to enhance the vehicle comprehensive performance. On the basis of the parallel connection between the SASS and ESP, an upper coordination controller on the finite-state basis is then combined in series with the SASS and ESP systems. The upper coordination controller identifies the vehicle's main driving conditions and make the strategy amendments to the bottom automotive semi-active suspension and electronic stability program. A SASS with PID control is presented along with an ESP with logic threshold control containing a variable slip rate and direct yaw moment control (DYC). Simulation results demonstrate that the coordinated control of the SASS and ESP on a finite-state basis can effectively improve the vehicle ride comfort and handling stability under multiple conditions.

Research on coordinated control of electronic stability program and active suspension system based on function allocation and multi-objective fuzzy decision

The stabilities of the handling and rollover are the two important performance of the vehicle and play an important role in vehicle safe driving. Focusing on improving the handling and rollover stabilities, a new approach to realize the coordinated control of the electronic stability program and the active suspension system is proposed. The vehicle model including the active suspension system has been built. The distance between vehicle centroid and the front and rear axles is estimated by the forgetting factor recursion least squares method on the basis of the vertical motion of the vehicle. The parameter self-tuning fuzzy proportional–integral–derivative control of the electronic stability program is adopted and the 2-degree-of-freedom vehicle model considering the changes of the distance between vehicle centroid and the front and rear axles is treated as the reference model. The active suspension system controller is designed according to the different functions of the active suspension system in different vehicle status areas. The function allocation controller is also designed using multi-objective fuzzy decision, which is used to realize the allocation control of the active suspension system and electronic stability program. Under the double-lane change conditions, the function allocation control has been simulated based on MATLAB/Simulink software, which results indicate that the function allocation control strategy of electronic stability program and active suspension system can significantly improve the manipulation and rollover stability of the vehicle at a high speed under emergency steering. Finally, the function allocation controller is installed to the active suspension system and electronic stability program hardware-in-loop test platform, and the hardware-in-loop test has been done, which results are consistent with the results of simulation.

Study on electronic stability program control strategy based on the fuzzy logical and genetic optimization method

This article introduces the β phase plane method to determine the stability state of the vehicle and then proposes the electronic stability program fuzzy controller to improve the stability of vehi...

Simulation Study on ESP Fuzzy Control Based on Road Automatic Identification

ESP (Electronic Stability Program) is a kind of active safety device which can comprehensively improve the brake, drive and high speed performance of the automobile. Mastering the key technologies of ESP control system plays an important role in improving the performance of ESP. Vehicle dynamic model and engine model with 9 degrees of freedom of one passenger car were established based on vehicle and tire force analysis. The ESP fuzzy control model based on slip ratio control was established. The optimal slip ratio under different pavements was confirmed by using road recognition method. ESP fuzzy control was realized under MATLAB/Simulink environment. And through the split road simulation prove the validity of the road recognition algorithm, and the effectiveness of the fuzzy control strategy. The simulation and the debugging results indicate that the ESP fuzzy control strategy based on road automatic identification works well, and obviously improves automobile stability under critical situations. And all of these make a good foundation for the further research and development for the ESP integrated control system.

The Optimization Research on Vehicle ESP Control Strategy

Electronic Stability Program (ESP) is an advanced initiative system for car security. As an integration of subsystems such as ABS, TCS, ESC, etc., this new control system is designed to accurately manipulate the dynamics behaviors of vehicles under critical adhesive conditions, allowing maximum cooperation of vehicles responses to the driver's operation within physical limits. This research has firstly established a dynamical model of an entire vehicle as the controlled object in this study of ESP. Then, the paper moved on to the design of ESP control algorithm strategy, discussing the selection problem of which wheels should the longitudinal control force apply to, and finally proposing an effective improvement on operational stability control of ESP system.

Coordinated Control of Electronic Stability Program and Active Front Steering

Abstract In this paper, the coordinated control system is proposed to improve vehicle handling and stability by coordinating control of Electronic Stability Program (ESP) and Active Front Steering (AFS). Firstly, we calculated the target yawing moment required to keep the vehicle stable according to PID control of the yaw-rate. Secondly, we proposed a fuzzy method to control Electronic Stability Program and Active Front Steering, then we used genetic algorithm to optimize the control rule to ensure the correctness and accuracy of the control rule. The performance of the integrated control system is evaluated by Computer simulations at two different running condition, we compared the performance of the integrated system with other situations such as only AFS control, only ESP control and no control. The results show that the method proposed in this paper is able to improve the driving dynamics and steering stability of the vehicle effectively.

Study on ESP Control Principle of Light Off-road Vehicle Based on Brake / Drive Integrated Control

Set up the dynamic model of light off-road vehicle, including body dynamics model, wheel model, engine model, and so on. For light off-road vehicle, project the electronic stability program (ESP) stability control principle based on the integrated control of brake and drive, the ASR engine control principle based on the PID control and the ASR differential brake intervention control principle. Based on the Matlab/Simulink, establish the dynamic simulation model of the ESP control system for the Beijing JEEP2500 light off-road vehicle. Using the simulation model, we respectively simulate and analyse the vehicle performance of low engine throttle opening control, ASR control and ESP control when the vehicle straight runs and turns on the bisectional road. The study results indicate that the proposed ESP control principle can obviously improve the comprehensive driving performances of light off-road vehicle, including the driving stability under different conditions. Language: en

Hydraulic Control Unit Modeling of Electronic Stability Program Based on AMESim

Hydraulic Control Unit(HCU) is the actuator for braking force distribution of Electronic Stability Program(ESP), the modeling and simulation of HCU have significant impact for ESP control logic research. According to the research on scheme of HCU hydraulic system, HCU model is establishes based on AMESim, and calibrates the property parameters of hydraulic component. A test platform for ESP system research is built. By comparison of results between test and simulation, the HCU model can well describe the property of HCU of test car environment, provide accurate actuator model for ESP development simulation and ESP pressure estimation algorithm.

Simulation Research on Layered Coordinated Control of Automotive ESP and ASS

Layered coordinated control models of automotive electronic stability program(ESP) and active suspension system(ASS) are built and adaptive fuzzy control of ESP is adopted, for which the controller is designed on the basis of state observer.The controller of ASS is designed by using optimal control theory of stochastic linear quadratic, and layered coordinated controller is designed.The coordinated controller calculates the weighted values of lower controllers by linear weight function.Matlab/Simulink simulation results indicate that the layered coordinated control strategy can improve the driving stability and comfort well.Coordinated controller, ESP controller and vehicle model are built in Labview system.Combined with ASS which is developed independently and actuator of ESP, hardware-in-the-loop simulation is carried out.The results are consistent with Matlab simulation results.