Modelling and characteristics of hybrid coupling hydro-pneumatic suspension for a seven-axle vehicle

2020 ◽  
pp. 095440702098321
Author(s):  
Tian Wen-Peng ◽  
Dou Jian-Ming ◽  
Xu Xin-Xin
Keyword(s):  
Ant Colony Algorithm ◽  
Ride Comfort ◽  
Optimal Parameter ◽  
Structural Characteristics ◽  
Coupling Scheme ◽  
Surface Model ◽  
Joint Simulation ◽  
Hybrid Coupling ◽  
Parameter Matching ◽  
Pneumatic Suspension

A hybrid coupling scheme of parallel connection and contralateral cross-linking was proposed based on the characteristics of high centroid position and low rollover threshold on hydro-pneumatic suspension (HPS) for a seven-axle elevated platform vehicle. A dynamic model with 20 DOFs which can comprehensively reflect vehicle coupling vibration including vertical-lateral-longitudinal-transverse and the joint simulation model of Simulink and AMESim were established based on the structural characteristics of the vehicle. Furthermore, the random road surface model linking the wheels was constructed by filter shaping white noise. Based on the model of hybrid coupling HPS, the study of joint simulation and test on the whole vehicle were conducted, and improved ant colony algorithm (IACA) was applied to the multi-objective optimisation study of HPS parameter matching. The comparison between simulation and test data shows that the weighted acceleration PSD curve is in good agreement, and the relative error of weighted acceleration RMS is small, which indicated that the theoretical model was accurate. The results of simulation and testing show that the optimal parameter matching scheme output by IACA can improve vehicle ride comfort and stability to a significant extent.

Hybrid coupling scheme for UMTS and wireless LAN interworking

2007 ◽  
Vol 61 (5) ◽  
pp. 329-336 ◽  
Author(s):  
Jee-Young Song ◽  
Hye Jeong Lee ◽  
Sun-Ho Lee ◽  
Sung-Won Lee ◽  
Dong-Ho Cho
Keyword(s):  
Wireless Lan ◽  
Coupling Scheme ◽  
Hybrid Coupling

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.

Multi-objective optimization for ride comfort of hydro-pneumatic suspension vehicles with mechanical elastic wheel

2018 ◽  
Vol 233 (11) ◽  
pp. 2714-2728 ◽  
Author(s):  
Youqun Zhao ◽  
Han Xu ◽  
Yaoji Deng ◽  
Qiuwei Wang
Keyword(s):  
Root Mean Square ◽  
Ride Comfort ◽  
Mean Square ◽  
Artificial Fish Swarm Algorithm ◽  
Multi Objective ◽  
Elastic Wheel ◽  
Radial Stiffness ◽  
Artificial Fish Swarm ◽  
Pneumatic Suspension ◽  
Mechanical Elastic Wheel

The new mechanical elastic wheel has the following advantages: non-pneumatic, anti-puncture, and explosion-proof. However, the larger radial stiffness is detrimental to vehicle ride comfort. To solve this problem, an integrated design method of hydro-pneumatic suspension matching mechanical elastic wheel is proposed in this paper. First, the nonlinear radial stiffness of mechanical elastic wheel is fitted by static loading experiment. Next, the mathematical model of hydro-pneumatic suspension is derived. Then, a half-car model, integrating hydro-pneumatic suspension and mechanical elastic wheel, is established. Finally, the top two optimization objectives, including vertical centroid acceleration root mean square and pitch acceleration root mean square, are optimized simultaneously, based on the Pareto multi-objective artificial fish swarm algorithm. The obtained results show that the optimization effect of multi-objective artificial fish swarm algorithm is obvious; the two optimization objectives have been optimized significantly. The proposed method that hydro-pneumatic suspension integrated with mechanical elastic wheel gains critical reference value for the design and optimization of vehicle chassis in theory and practice.

A Design Procedure for Asymptotically Optimal Dynamic Compensators

1990 ◽  
Vol 112 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Kiyotaka Shimizu ◽  
Masakazu Suzuki ◽  
Misao Kato
Keyword(s):  
Optimal Parameter ◽  
Design Method ◽  
Design Procedure ◽  
Pole Placement ◽  
Feedback Gain ◽  
Controlled System ◽  
Parameter Matching ◽  
One Step ◽  
Optimal Dynamic ◽  
Optimal Regulator

This paper is concerned with a design method for optimizing dynamic compensators of Pearson’s type. Optimal parameter matrices are obtained by use of a parameter matching technique and an arbitrary pole placement technique. The controlled system has the optimal LQ modes and the modes with arbitrarily quick damping. The presented compensator works as the optimal regulator with observer and performs about the same control as the optimal regulator. And it is designed not in two steps; observer, regulator, but in one step; optimization of output feedback gain without considering any state estimation.

Simulation Analysis of Firing Dynamics on a New Heavy Machine Gun

2014 ◽  
Vol 574 ◽  
pp. 32-35 ◽  
Author(s):  
Zhi Teng Fan ◽  
Rui Lin Wang ◽  
Tao Li
Keyword(s):  
Boundary Conditions ◽  
Structural Optimization ◽  
Test Data ◽  
Simulation Analysis ◽  
Structural Characteristics ◽  
Prototype Model ◽  
Dynamics Model ◽  
Movement Characteristic ◽  
Parameter Matching ◽  
Heavy Machine

In order to study the automation dynamics of a certain type of Heavy Machine Gun, a virtual prototype model is established based on analysing the structural characteristics and movement principle. The dynamics model is created by ADAMS, including determining the boundary conditions of shooter and soil. The movement characteristic of bolt in rounds of continuous firing is analysed. Choosing the velocity of bolt as checkout targets, analysing the simulation result and test data comparatively, the feasibility of model is confirmation. So the foundation of further movement analysing, parameter matching and structural optimization about the rifle is laid.

scholarly journals Multidataset Study of Optimal Parameter and Uncertainty Estimation of a Land Surface Model with Bayesian Stochastic Inversion and Multicriteria Method

2004 ◽  
Vol 43 (10) ◽  
pp. 1477-1497 ◽  
Author(s):  
Youlong Xia ◽  
Mrinal K. Sen ◽  
Charles S. Jackson ◽  
Paul L. Stoffa
Keyword(s):  
Land Surface ◽  
Root Zone ◽  
Model Simulation ◽  
Optimal Parameter ◽  
Land Surface Model ◽  
Heat Fluxes ◽  
Surface Model ◽  
Optimal Parameters ◽  
Stochastic Inversion ◽  
The Impact

Abstract This study evaluates the ability of Bayesian stochastic inversion (BSI) and multicriteria (MC) methods to search for the optimal parameter sets of the Chameleon Surface Model (CHASM) using prescribed forcing to simulate observed sensible and latent heat fluxes from seven measurement sites representative of six biomes including temperate coniferous forests, tropical forests, temperate and tropical grasslands, temperate crops, and semiarid grasslands. Calibration results with the BSI and MC show that estimated optimal values are very similar for the important parameters that are specific to the CHASM model. The model simulations based on estimated optimal parameter sets perform much better than the default parameter sets. Cross-validations for two tropical forest sites show that the calibrated parameters for one site can be transferred to another site within the same biome. The uncertainties of optimal parameters are obtained through BSI, which estimates a multidimensional posterior probability density function (PPD). Marginal PPD analyses show that nonoptimal choices of stomatal resistance would contribute most to model simulation errors at all sites, followed by ground and vegetation roughness length at six of seven sites. The impact of initial root-zone soil moisture and nonmosaic approach on estimation of optimal parameters and their uncertainties is discussed.

scholarly journals Effect of operating conditions on a heavy truck ride comfort with hydro-pneumatic suspension system

2021 ◽  
Vol 304 ◽  
pp. 02011
Author(s):  
Le Xuan Long ◽  
Dang Viet Ha ◽  
Le Van Quynh ◽  
Bui Van Cuong ◽  
Vu Thanh Niem
Keyword(s):  
Ride Comfort ◽  
Surface Condition ◽  
Operating Conditions ◽  
Dump Truck ◽  
Vibration Model ◽  
Pneumatic Suspension ◽  
Heavy Truck ◽  
Set Up ◽  
Mining Dump Truck ◽  
Vehicle Vibration Model

The purpose of this paper is to analyze the performance of the hydro-pneumatic suspension system (HPSs) of a mining dump truck on ride comfort under operating conditions. To achieve goals, a 3-D full-vehicle vibration model of a mining dump truck with 10 degrees of freedom is set up to analyze the effects. A nonlinear mathematical model is set up based on the nonlinear characteristics of the HPSs to determine their vertical force which is connected with a 3-D full-vehicle vibration model. The effects of operating conditions on a heavy truck ride comfort are respectively analyzed through the values of the root mean square of acceleration responses of the vertical cab, pitch and roll angles of cab (awc, awphi and awteta). The analysis results indicate that the survey conditions have a great influence on vehicle ride comfort. Especially, the values of awc, awphi and awteta with the poor road surface condition respectively reduce by 43.1%, 45.9% and 61.8% compared to the very poor road surface condition at vehicle speed of 30 km/h and full load.

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