Algerian Journal of Engineering Research



The Algerian Journal of Engineering Research The Algerian Journal of Engineering research is an English language peer–reviewed halfyearly publication of original research and reviews articles dealing with fundamental and applied research and innovation in the field of Engineering and related areas. Thus theoretical, interpretative or experiment high quality papers are welcomed. The Algerian Journal of Engineering research is issued and published by Salah Boubnider University of Constantine in collaboration with a local and is edited by a local and an international group of eminent researchers. Papers previously published elsewhere cannot be accepted for the journal. The acceptance for publication lies with the editors and is based on the recommendations of at least two ad hoc referees, and of the editorial board, if necessary







Satellite Attitude Control Based Adaptive sliding Mode Method

Benmansour Jalal Eddine, 

Résumé: This paper proposes an adaptive sliding-mode controller design for a three-axis stabilized rigid satellite attitude system with uncertain disturbances. The rigid satellite attitude control systems can be described by the dynamic equations and kinematic equations. This method combined sliding mode control and an adaptive algorithm, which is used to estimate the disturbances uncertainties. Tracking performance is guaranteed, as well as the stability of closed-loop attitude control systems is analysed by using Lyapunov approach stability, the simulations results demonstrate the effectiveness of the proposed control method.

Mots clés: Adaptive controller ; Attitude control ; Rigid spacecraft ; Sliding mode

Optimization in production of yogurt enriched with phenolic compounds of carob pulp (Ceratonia siliqua L.) by experiment plan

Benchikh Yassine,  Djellas Iliès Kadda,  Mohellebi Nassima, 

Résumé: The present work concerned the enriching of a homemade yogurt with the phenolic compounds of the carob pulp (Ceratonia siliqua L.) and the optimization of its production by following, particularly, the pH and the viscosity. For this, a central composite plan was chosen, fixing the volume of the added aqueous carob extract (VACE) and the incubation time. These are the two influencing factors of the production of yogurt. The extraction of phenolic compounds (CP) was achieved by decoction. The CP contents and the antioxidant activity (AA) of the obtained extract were 1.71 ± 0.01 g GAE (Gallic Acid Equivalent) / 100 g DM (Dry Matter) and 79.4 ± 0.01%, respectively. From this extract, 3 VACE of 150, 300, and 450 mL were adjusted to 1 L of milk for the production of yogurt and a sample was left as a control. The optimal conditions to produce a yogurt enriched with phenolic compounds were 446.55 mL for the VACE and 6.95 h for the incubation time. According to the obtained results there was 0.99 g GAE of phenolic compounds in a liter of processed yogurt.

Mots clés: carob pulp extract ; yogurt ; phenolic compounds ; optimization ; central composite plan