scholarly journals Elasto-kinematics design of an innovative composite material suspension system

2017 ◽  
Vol 8 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Shuang Xu ◽  
Alessandro Ferraris ◽  
Andrea Giancarlo Airale ◽  
Massimiliana Carello
Keyword(s):  
Composite Material ◽  
Hybrid Vehicles ◽  
Suspension System ◽  
Engine Compartment ◽  
Carbon Fiber Reinforce Polymer ◽  
Composites Materials ◽  
Suspension Control ◽  
Personal Transportation ◽  
Transportation Vehicle ◽  
Fiber Reinforce

Abstract. In this paper, a lightweight suspension system for small urban personal transportation vehicle is presented. A CFRP (Carbon fiber reinforce polymer) beam spring has been used to efficiently integrate the functions of suspension control arm and anti-roll bar. Composites materials were chosen to tailor the required behavior of the beam spring and to reduce the weight. Furthermore, larger space for engine compartment has been provided thanks to the compact arrangement of beam suspension components. This suspension could be installed on electric/hybrid vehicles and conventional automobiles.

scholarly journals Design of Magnetic Flux Feedback Controller in Hybrid Suspension System

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Wenqing Zhang ◽  
Jie Li ◽  
Kun Zhang ◽  
Peng Cui
Keyword(s):  
Magnetic Flux ◽  
Feedback Linearization ◽  
Control Algorithm ◽  
Suspension System ◽  
Magnetic Suspension ◽  
Magnetic Flux Density ◽  
Stable Suspension ◽  
State Variable ◽  
Suspension Control ◽  
National University

Hybrid suspension system with permanent magnet and electromagnet consumes little power consumption and can realize larger suspension gap. But realizing stable suspension of hybrid magnet is a tricky problem in the suspension control sphere. Considering from this point, we take magnetic flux signal as a state variable and put this signal back to suspension control system. So we can get the hybrid suspension mathematical model based on magnetic flux signal feedback. By application of MIMO feedback linearization theory, we can further realize linearization of the hybrid suspension system. And then proportion, integral, differentiation, magnetic flux density B (PIDB) controller is designed. Some hybrid suspension experiments have been done on CMS04 magnetic suspension bogie of National University of Defense Technology (NUDT) in China. The experiments denote that the new hybrid suspension control algorithm based on magnetic flux signal feedback designed in this paper has more advantages than traditional position-current double cascade control algorithm. Obviously, the robustness and stability of hybrid suspension system have been enhanced.

scholarly journals Composite Materials and Their Fiber Reinforcement Technology in Aerospace Field

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Kailin Zhou
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Research And Development ◽  
Carbon Fibers ◽  
Fiber Reinforcement ◽  
Space Structures ◽  
Advanced Composite ◽  
Advanced Composite Materials ◽  
Composites Materials ◽  
Definition Of

The need to reduce the overall weight of aeronautical and space structures while preserving or even improving their performances make the research and development in the field of advanced composite materials necessary for the advancement of aerospace technologies. This paper provides an overview of composite materials and their fiber reinforcement technology in aerospace field. We discuss the reasons for aircraft manufacturers and airlines to use composites and illustrate the definition of composite material. Then, we list the advantages and disadvantage of composite materials and cite different fiber reinforcement technologies of carbon fibers, aramid fiber, UHMWPE, etc. At last, we summarize the present and future applications of composites materials in aerospace and other civil fields. A conclusion is drawn that in the future, composite materials are set for their development, while continually decreasing its costs is still an important task.

Test Analysis of a Six-Wheel Hydraulic Active Suspension Control System

2012 ◽  
Vol 591-593 ◽  
pp. 1710-1714
Author(s):  
Wei Chen ◽  
Zhi Yao ◽  
Qing Bo Zhao ◽  
Tong Jian Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Active Suspension ◽  
Hydraulic Cylinder ◽  
Suspension System ◽  
Quantitative Feedback Theory ◽  
Test Analysis ◽  
Suspension Control ◽  
System Robustness ◽  
Road Performance

In order to make the active hydraulic suspension system to adaptive the ground. Taking the asymmetric valve controlled hydraulic cylinder as actuators, a six wheels hydraulic active suspension was designed. It is difficult to analysis of the six wheels system. So this paper established the single wheel’s mathematical model to instead analysis of the whole system, designed QFT (Quantitative Feedback Theory) controller which can be a solution to the system robustness, researched the hydraulic active suspension system. The results show that it is good for tracking performance of the hydraulic cylinder which taking the asymmetric valve controlled as actuators, system responses timely and the controller can meet the controlling requirements. This hydraulic active suspension system can improve off-road performance of engineering vehicles.

Theoretical Considerations on Fibre Reinforced Composites Thermal Conductivity Uncertainties

2015 ◽  
Vol 1128 ◽  
pp. 171-177
Author(s):  
Tudor Mihai Simionescu ◽  
Alina Adriana Minea
Keyword(s):  
Thermal Conductivity ◽  
Composite Material ◽  
Engineering System ◽  
Thermal Expansion Coefficients ◽  
Theoretical Approaches ◽  
Composites Materials ◽  
Expansion Coefficients ◽  
Theoretical Considerations ◽  
Fibre Reinforced Composites ◽  
Properties Of Composites

Thermal conductivity of composites is anisotropic in nature and data about thermal conductivity of resin facilitates to reduce stresses related to shrinkage of composites during cure and mismatch in thermal expansion coefficients. Before conducting experiments to determine thermal conductivity of various composites, knowledge about effect of different parameters influencing thermal conductivity is essential. The increasing use of composites, for various applications, emphasizes its importance/significance in the thermal property analysis of an engineering system. Published literature is rich with investigations of mechanical properties of composites, but fewer publications are focused on thermal properties. Several publications addressing different theoretical approaches for predicting thermal conductivity of composite materials have been noted. Various theoretical approaches are used to yield the thermal conductivity of a composite material so that the heat flow in anisotropic composite material in any direction can be estimated. In this paper few models will be considered and a theoretical study on thermal conductivity uncertainties will be conducted and discussed. The results identified the need and importance of carrying out further investigations on thermal behavior of composites materials.

Performance Evaluation of Spring for the Vehicle Suspension System Using the Nonlinear Finite Element Method

2014 ◽  
Vol 635-637 ◽  
pp. 594-597
Author(s):  
Byeong Soo Kim ◽  
Byung Young Moon ◽  
Sung Kwan Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Material ◽  
Suspension System ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Air Spring ◽  
Rubber Sleeve ◽  
The Impact ◽  
Element Method

Air spring is used for the suspension system and it affects the vehicle stability and riding comfort by improving the impact-relief, braking, and cornering performance. Air Spring is comprised of the upper plate, lower plate, and rubber sleeve. Rubber sleeve is the composite material, which is made up of combination of rubber and Nylon, and the characteristics are changed according to the shape of rubber-sleeve, the angle of reinforcement cord. In this study, the distribution of internal stresses and the deformation of rubber composite material are analyzed through the nonlinear finite element method. The result showed that the internal maximum stresses and deformations about the changes of cord angle caused the more the Young's modulus decrease, the more maximum stress reduced.

scholarly journals Deep desulfurization performance of thiophene with deep eutectic solvents loaded carbon nanotube composites

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Yue Liu ◽  
Jiaojiao Xue ◽  
Xin Zhou ◽  
Yingna Cui ◽  
Jingmei Yin
Keyword(s):  
Composite Material ◽  
Chemical Properties ◽  
Oxidation Mechanism ◽  
Deep Eutectic Solvents ◽  
Fuel Oil ◽  
Desulfurization Rate ◽  
Composites Materials ◽  
Deep Desulfurization ◽  
Physico Chemical ◽  
Nanotube Composites

One source of air pollution is the combustion of sulfur compounds in fuel oil. Reducing sulfur content in fuel oil has become a hot issue demanding timely solutions. Using ionic liquids and deep eutectic solvents (DESs) to remove sulfides in fuel oil has achieved good results presently. However, since DESs are liquid and their transportation and separation are inconvenient, a new way is proposed that the DESs are loaded on the carbon nanotubes (CNTs) with large specific surface area and good chemical stability. A series of composites materials (DESs/CNTs) were prepared. Finally, they are applied to the removal of sulfides in fuel oil. This loading method, which imparts introduced unique physico-chemical properties of the DESs to the carrier materials, preserves both advantages while overcoming some of the problems with DESs. The interaction between DESs and CNTs is mutual promotion. Therefore, this study has important theoretical significance and industrial application value. Under optimal conditions, when the reagent ChCl/p-TsOH (1 : 2) was loaded on multi-walled CNTs (OD = 30–60 nm) to prepare the composite material (ChCl/p-TsOH)/CNTs, the single desulfurization rate of the composite material was 95.8%. Finally, the catalytic/oxidation mechanism was studied systematically and this work would provide a green route for the desulfurization of fuels.

scholarly journals Preparation of Energetic Composites Materials via Sol-Gel

2021 ◽  
Vol 2133 (1) ◽  
pp. 012001
Author(s):  
Baoqiong Guo ◽  
Xiaoan Wei ◽  
Binbin Wang
Keyword(s):  
Composite Material ◽  
Sol Gel ◽  
Decomposition Reaction ◽  
High Energy ◽  
Time Curve ◽  
Cellulose Structure ◽  
Composites Materials ◽  
Ft Ir ◽  
Drying Technology ◽  
Energetic Composites

Abstract In this research, nitrocellulose / magnesium borohydride nanomaterials (NC / Mg(BHx)y) nanoenergetic composite materials are synthesized through sol-gel method and the freeze-drying technology. Among them, nitrocellulose (NC) is used as a gel matrix to load Mg(BHx)y particles. Scanning electron microscopy (SEM) results show that Mg(BHx)y is embedded and uniformly dispersed in the NC matrix. The particle size of the high-energy composite material is about 2 μm. The results of FT-IR showed that the hydrogen storage alloy was successfully loaded around the NC without destroying the cellulose structure. The composite material decomposition reaction (Temperature-Time) curve is obtained through the adiabatic accelerated calorimeter (ES-ARC) test.

Behavior Analysis of a Ship Structure Made out of Composite Materials

2017 ◽  
Vol 1143 ◽  
pp. 127-132
Author(s):  
Adrian Presura ◽  
Ionel Chirica ◽  
Elena Felicia Beznea
Keyword(s):  
Composite Material ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Natural Frequencies ◽  
Material Selection ◽  
Wave Loads ◽  
Rule Based ◽  
Ship Structure ◽  
Composites Materials ◽  
Resonance Frequencies

. In this paper a parametric static and torsion analysis on a catamaran ship structure made out of composites materials is performed. The best solution for material selection is based on specific criteria for certain analysis. For dynamic analysis, the main criteria is to obtain the structure natural frequencies in a range, far from the resonance frequencies produced by the ship propulsion installation, wave loads etc. For static analysis the comparative criteria is to obtain the lowest weight of structure for the same strength. Also, buckling item is other criteria for comparative analysis. The comparative analysis is performed between rule based scantling structure and a FEM based structure for a composite material twin hull deck, in order to reduce the total hull weight. Material used for ship deck structure of the analyzed ship is e-glass polyester.

Application of Magnetic Flux Feedback Control in Hybrid Suspension System

2013 ◽  
Vol 709 ◽  
pp. 273-280
Author(s):  
Wen Qing Zhang ◽  
Jie Li ◽  
Kun Zhang ◽  
Peng Cui
Keyword(s):  
Magnetic Flux ◽  
Feedback Linearization ◽  
Control Algorithm ◽  
Suspension System ◽  
Magnetic Suspension ◽  
Magnetic Flux Density ◽  
State Variable ◽  
Suspension Control ◽  
Defense Technology ◽  
National University

Hybrid suspension system with permanent-magnet and electromagnet consumes little power consumption, and can realize larger suspension gap. We took magnetic flux signal as a state variable, and put this signal back to suspension control system. So we got the hybrid suspension mathematical model based on magnetic flux signal feedback. With application of MIMO feedback linearization theory, we can realize linearization of the hybrid suspension system. Then PIDB (proportion, integral, differentiation, magnetic flux density B) controller was designed. Some hybrid suspension experiments had been done on CMS04 magnetic suspension bogie of NUDT (National University of Defense Technology) in China. The experiment results denote that hybrid suspension control algorithm based on magnetic flux signal feedback designed has more advantages than traditional position-current double cascade control algorithm. Obviously the robustness and stability of hybrid suspension system have been enhanced.

Sign in / Sign up

Export Citation Format

Share Document