scholarly journals Hybrid sensor network control of vehicle ride comfort, handling, and safety with semi-active charging suspension

2020 ◽  
Vol 16 (2) ◽  
pp. 155014772090458
Author(s):  
Shaoyi Bei ◽  
Chen Huang ◽  
Bo Li ◽  
Zhiyu Zhang
Keyword(s):  
Sensor Network ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Steering System ◽  
Network Control ◽  
Hybrid Network ◽  
Driving Safety ◽  
Negative Effects ◽  
Pulse Input ◽  
Stable Domain

Semi-active charging suspension has been the highlight in the research of ride comfort, handling, and safety of road vehicles in real time. Adjustable damping shock absorber is the key part of semi-active suspension. Many studies are focused on the control and impacts of automotive ride comfort. However, few of them are about the relationship among the damping of adjustable damping shock absorber, handling stability, and safety. In this article, a full car model based on multi-body dynamics was built, including the steering system, front and rear suspensions, tire, driving controller, and road. And the model was verified by tests. Based on the co-simulation, a controller was built based on hybrid sensor network control. The hybrid network control principle was switched among comfort controller, stability controller, and safety controller, in accordance with working conditions. The design effectively improved ride comfort, handling stability, and driving safety. Finally, a rapid control prototype was built based on dSPACE to conduct a real vehicle test. By comparison of the time response diagram, the results on pulse input and S-shaped road indicate that handling stability and driving safety enter into the stable domain and negative effects are successfully suppressed.

scholarly journals Investigation of the suspension design and ride comfort of an electric mini off-road vehicle

2019 ◽  
Vol 11 (1) ◽  
pp. 168781401882335 ◽  
Author(s):  
Bin Yu ◽  
Zhice Wang ◽  
Guoye Wang ◽  
Jianzhu Zhao ◽  
Liyang Zhou ◽  
...  
Keyword(s):  
Shock Absorber ◽  
Natural Frequencies ◽  
Ride Comfort ◽  
Piecewise Linear ◽  
Damping Ratio ◽  
Road Vehicle ◽  
Pulse Input ◽  
Response Characteristics ◽  
Quarter Car Model ◽  
Damping Characteristics

In view of the little research that has been conducted on the ride comfort of mini vehicles, an electric mini off-road vehicle was designed in this study and a 2 degree-of-freedom quarter car model was established to investigate the ride comfortability. The amplitude-frequency and vibration response characteristics of the suspension were analyzed with the natural frequencies of the front and rear suspensions selected in accordance with the required driving performance. A comprehensive objective function with respect to the safety and comfortability was established, and the damping ratio of the suspension was determined. The damping characteristics of the shock absorber were analyzed to derive an adjustment rule of the suspension damping ratio. The piecewise linear speed characteristics of the shock absorber were subsequently obtained, and suspension-parameter identification and ride comfort tests were conducted. The test results showed that the natural frequencies and damping ratios of the front and rear suspensions were 1.676 and 1.922 Hz, and 0.225 and 0.242, respectively. The results of a pulse input test and D-level road random running test also demonstrated the safety and good ride comfortability of the vehicle.

Integrated control of electric power steering and active suspension systems based on model predictive algorithm

2020 ◽  
pp. 1-21
Author(s):  
Qiang Zhao ◽  
Baoquan Zhu ◽  
Yulong Pei ◽  
Na Wang
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Passive Control ◽  
Ride Comfort ◽  
Steering System ◽  
Integrated Model ◽  
Suspension System ◽  
Driving Safety ◽  
Control Effect ◽  
The Impact

This paper investigates how to control suspension system and steering system to cooperatively ensure their performance. A model predictive controller is designed for their integrated model, which includes three parts: predictive model, rolling optimization and online correction. Repeated online optimization is based on actual output feedback information, real-time consideration of the impact of uncertainties, and timely correction. The simulation results show that the integrated model predictive control effect of steering system and suspension system is better than those of non-integrated passive control and integrated optimal control. The ride comfort, handling stability and driving safety of the vehicle are all improved with the integrated model predictive control.

scholarly journals An Optimal Longitudinal Control Strategy of Platoons Using Improved Particle Swarm Optimization

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Zhizhou Wu ◽  
Zhibo Gao ◽  
Wei Hao ◽  
Jiaqi Ma
Keyword(s):  
Particle Swarm Optimization ◽  
Control Strategy ◽  
Ride Comfort ◽  
Particle Swarm ◽  
Experimental Simulation ◽  
Driving Safety ◽  
Relative Speed ◽  
Longitudinal Control ◽  
Swarm Optimization ◽  
Improved Particle Swarm Optimization

Most existing longitudinal control strategies for connected and automated vehicles (CAVs) have unclear adaptability without scientific analysis regarding the key parameters of the control algorithm. This paper presents an optimal longitudinal control strategy for a homogeneous CAV platoon. First of all, the CAV platoon models with constant time-headway gap strategy and constant spacing gap strategy were, respectively, established based on the third-order linear vehicle dynamics model. Then, a linear-quadratic optimal controller was designed considering the perspectives of driving safety, efficiency, and ride comfort with three performance indicators including vehicle gap error, relative speed, and desired acceleration. An improved particle swarm optimization algorithm was used to optimize the weighting coefficients for the controller state and control variables. Based on the Matlab/Simulink experimental simulation, the analysis results show that the proposed strategy can significantly reduce the gap error and relative speed and improve the flexibility and initiative of the platoon control strategy compared with the unoptimized strategies. Sensitivity analysis was provided for communication lag and actuator lag in order to prove the applicability and effectiveness of this proposed strategy, which will achieve better distribution of system performance.

Variation in Automotive Shock Absorber Damping Characteristics & amp; Their Effects on Ride Comfort Attribute and Vehicle Yaw Response

2021 ◽  
Author(s):  
Satyaranjan Sahoo ◽  
Eric Pranesh De Reuben ◽  
Deepak BAKSHI ◽  
Hari Krishnan ◽  
Amardeep Singh
Keyword(s):  
Shock Absorber ◽  
Ride Comfort ◽  
Damping Characteristics

Analysis of the energy harvesting potential–based suspension for truck semi-trailer

2018 ◽  
Vol 233 (11) ◽  
pp. 2955-2969 ◽  
Author(s):  
Mohamed AA Abdelkareem ◽  
Mina MS Kaldas ◽  
Mohamed Kamal Ahmed Ali ◽  
Lin Xu
Keyword(s):  
Ride Comfort ◽  
Simulation Analysis ◽  
Conflict Analysis ◽  
Driving Safety ◽  
Dissipated Energy ◽  
Ride Quality ◽  
Surface Model ◽  
Long Distance ◽  
Class C ◽  
The Right

As the articulated trucks are mainly used for long distance transportations, the design of the suspension system became a major concern and a research hotspot not only for ride comfort and driving safety but also for energy consumption. Therefore, the objective of this study is to conduct a comprehensive parametrical–based conflict analysis between the ride comfort and road holding together with the potential power of the shock absorbers. The simulation analysis is performed using a 23 degree-of-freedom full truck semi-trailer mathematical model with random road surface model. The bounce and combined excitation modes for the truck model are applied to present the pro and contra of the simplified and realistic analysis. The bounce mode is applied for a road Class C and truck driving speed of 20 m/s, while the combined mode is performed with the same truck-speed but considering a Class C road for the left track and Class D road for the right track considering the time delay between the truck axles. The truck dynamics including the mean potential power, average dynamic tire load and bounce, and pitch and roll accelerations is comprehensively combined in the conflict analysis–based suspension and driving parameters. The obtained simulation results showed that the articulated truck suspension should be designed considering a realistic excitation condition. In contrast to the bounce mode, under the combined road input, the tractor ride quality and road handling performances are improved when a heavily damped suspension is considered. Furthermore, the otherwise dissipated energy through the damping events can reach an overall value between 2 and 4 kW.

scholarly journals Electronic Control System for Steer by Wire

2021 ◽  
Vol 9 (VI) ◽  
pp. 4161-4166
Author(s):  
Eeshan Ranade
Keyword(s):  
Electric Power ◽  
Engine Performance ◽  
Steering System ◽  
Electric Power System ◽  
Driving Safety ◽  
Steering Wheel ◽  
Hydraulic Systems ◽  
Compact Structure ◽  
Steer By Wire ◽  
Improved Performance

Automobile industry’s focus is on efficiency, safety and performance has resulted in the rapid introduction of electronics in vehicle safety systems and engine management. Mechanical and Hydraulic systems are now gradually being replaced by electronic controllers to achieve the objectives of optimizing power consumption, improving driver convenience, and maximizing driver safety resulting in an overall improved performance and experience. Vehicle steering systems have transitioned from mechanical to hydraulic power to an electric power assisted steering system and now to the state of the art, Steer by Wire (SbW) system. Traditional mechanical systems included a steering wheel, column, gear, rack and pinion and did not support any power steering. The next generation hydraulic systems were more stable, safer and required comparatively lesser effort. Electric or DC motors drove the Electric Power System addressing the drawbacks of the hydraulic systems especially those related to environment and acoustics with the added advantage of a compact structure and power-on-demand engine performance. By-wire steering technologies was originally introduced in the Concord aircraft in 1970s. The SbW is a steering system with no steering column. The mechanical interface between the steering wheel and the wheels is replaced with by-wire electrical connection/electronic actuators. SbW system has significant advantages in terms of driving safety due to the availability of the steering command in electronic form and the removal of the steering shaft, cruising comfort with driving manoeuvring due to no space constraint and favourable to the environment with the non-usage of hydraulic oils.

Sign in / Sign up

Export Citation Format

Share Document