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...

Cost of energy per unit of goods or services may evolve as a key differentiator of economic growth. The debt of nations will be re-structured. Corporations, big or small, may not escape from managing their energy supply chains or their carbon footprints. Energy supply chains may disrupt traditional physical and financial value networks so much so that different business models with quite divers...

In this paper, the problem of driving angular position of a direct current servomotor system with unmodeled wide backlash nonlinearity is addressed. In order to tackle this problem, a control scheme based on an adaptive super twisting algorithm is proposed. In order to implement the proposed controller, information about angular velocity is estimated by means of a robust differentiator. Based o...

The problem of designing sliding-mode observers for systems with unknown inputs is considered when the so-called observer matching condition is not satisfied. This condition severely restricts the applicability of sliding-mode observers. To circumvent the observer matching condition, thereby broadening the class of systems for which sliding-mode observers can be constructed, a possible method i...

Octopamine is a biogenic amine that is widespread in the insect nervous system (Evans, 1978; Dymond & Evans, 1979). In the locust, it potentiates the amplitude and increases the rate of relaxation of tension, in the extensor tibiae muscle of a hindleg, induced by the stimulation of the slow excitatory motoneurone (SETi) (1979) determined relaxation rates by graphical analysis of the data; a pro...

This paper investigates the analysis and design of digital single-loop voltage-controller for grid-forming voltage source converters with LC-filters. Inspired by structure diagram passive damping method, virtual resistance concept based on only capacitor feedback is used to realize active without need any current sensor, reducing thus system costs. It revealed from controller closed-loop that i...

In this letter we present a technique for the implementation of Nth-order ultrafast temporal differentiators. This technique is based on two oppositely chirped fiber Bragg gratings in which the grating profile maps the spectral response of the Nth-order differentiator. Examples of 1(st), 2(nd), and 4(th) order differentiators are designed and numerically simulated.