Aiming at the semi-active control problem of interconnected air suspension, an mode switching strategy is designed based on variation law comprehensive indexes under different modes. Considering parameter uncertainties in process model linearization, a vehicle suspension considering proposed robust theory. Based BP neural network method, mapping relationship between spring force and volume esta...

The topic of this paper is the design and analysis of a control system for a semi-active suspension in a 2-wheel vehicle. The control system is implemented via a semi-active electro-hydraulic damper located on the rear suspension of a hypersport-class motorbike. The entire design and analysis procedure is outlined: the semi-active damper is analyzed and characterized; a wide range of control st...

This paper is devoted to the design of a decentralized optimal batch LQ state observer for state estimation of large-scale interconnected systems, well suited for implementation on a sensor network. The here-proposed approach relies on both the use of an augmented Lagrangian formulation and a price-decomposition-coordination algorithm. The state estimation of an openchannel hydraulic system ill...

Hydraulic cements develop mechanical strength and low permeability as a result of hydration, which involves chemical reactions between water and the anhydrous compounds present in the cement. Solid hydration products form both at the surfaces of the cement particles and in the pore space by nucleation and aggregation. As a result, the solid phase becomes highly connected and the material transf...

Available hydropneumatic suspension simulation test benches have insufficient loading accuracy and limited functionality rendering them unsuitable for performance testing of heavy vehicles with this type suspension. Therefore, a multi-functional compound bench was designed that used an electro-hydraulic proportional control technique. A mathematical model established to describe the hydraulic s...

The hydraulic active suspension systems have certain nonlinear and time-varying behaviors. It is difficult to establish an appropriate dynamic model for model-based controller design. Here a novel neural network based sliding mode control is proposed by combining the advantages of the adaptive, radial basis function neural network and sliding mode control strategies to release the model informa...

The use of fractional differentiation in vehicle suspension design has many interests. This paper presents a hydropneumatic suspensions design method based on fractional differentiation. Once an hydraulic structure has been chosen for the suspension, it is possible to calculate the values of all technological parameters, so that the suspension force deflection transfer function is a band-limite...

This paper describes the analysis of a novel isotropic suspension designed for use in a Micro Electro Mechanical System (MEMS) z-axis angular gyroscope. The suspension, consisting of six concentric interconnected rings rigidly attached to an anchored frame, supports a resonating proof mass whose line of oscillation precesses in the presence of rotation induced Coriolis force. The paper demonstr...

In this paper, the development of a semiactive suspension control of quarter car model using fuzzy-based controller has been done. The quarter car model to be used here can be described as a nonlinear two degrees of freedom system which is subject to excitation from different road profile. The semi-active control is designed as the fuzzy control inferred by using two single input rule fuzzy mod...