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Design of H∞ proportional-integral thrust controller for ramjet engine

Zorić Nemanja Dušan, Radulović Radoslav Danilo, Jazarević Vladimir Miloš, Petrović Trajko Borivoje

Journal of Theoretical and Applied Mechanics

2020

Vol. 58 nr 4

997--1007

This paper presents the design of a thrust controller for a ramjet engine. The mathematical model for controller synthesis is based on a numerical solution of a set of nonlinear equations. Transfer functions of the engine are found for certain operation points defined by the altitude, Mach number and angle of attack. Local controllers are developed by using H∞ control methodology, finally reduced to proportional-integral (PI) controllers. For gain scheduling, linear interpolation of parameters of the local PI controllers is used. Next, simulations are performed in order to show performances of the presented control algorithm.

Sliding mode speed control for multi-motors system

Bouchiba B., Hazzab A., Glaoui H., Med-Karim F., Bousserhane I. K.

Journal of Automation Mobile Robotics and Intelligent Systems

2010

Vol. 4, No. 3

50-54

Continuous processes in the plastics, textile paper and other industries, require several drives working in synchronism. The aim of this paper is to control speed of the multi motors system, and to maintain a constant mechanical tension between the rollers of the system. Several controllers are considerer, including Proportional-Integral (PI) and sliding-mode control (SMC). Since the PI control method can be applied easily and is widely known, it has an important place in control applications. But this method is insensitive to parameter changes. The advantage of an SMC is its robustness and ability to handle the non-linear behaviour of the system, and is indicated in comparison with traditional proportional-integral (P1) control scheme. Theoretical analysis and simulation results are provided to evaluate the consistency and performances of this control technique (SMC).