THE STUDY OF THE AUTOMATIC SYSTEM FOR THE SEALED COCKPITS AIRFLOW REGULATION USING INDIRECTLY ACTION AIRFLOW REGULATORS
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
The paper presents the mathematical model of an automatic system for the sealed cabin airflow regulation using indirectly action airflow regulator. The goal of this Automatic Regulation System (ARS) is to constantly provide a certain pressure in the cabin, accordingly to the altitude. After deducing the equations of the system and the state equations that characterize it, the authors of the paper have simulated the system in Matlab/Simulink medium in order to analyze the ARS’s dynamic characteristics; thus, using a Matlab/Simulink model and a Matlab program, time characteristics representing the time variation of the non-dimensional cabin pressure, time variations of the non-dimensional displacement of the sensitive element and time variation of the non-dimensional regulator surface have been obtained. One highlights the disturbances that act on the system and the transfer functions which express the response of this system to these disturbances and one makes assessments regarding these disturbances’ influence upon stabilization of the cabin pressure. The originality of this work is the obtaining of the system’s mathematical model and the analysis of its dynamic behavior (the obtaining of the transfer functions, poles, zeros, stability’s analysis, response of the system to one or two inputs and so on). The duration of the transient regime is about 18 seconds. In general this transient regime isn’t a good one, but, in this case, this transient regime’s duration is good because the system of pressure’s regulation is a slow system (the pressure’s regulation must not be done very quickly). The system is stable (the step responses of it proves this fact).
Authors and Affiliations
Romulus LUNGU, Mihai LUNGU
Keywords
Related Articles
- EP ID EP113441
- DOI -
- Views 131
- Downloads 0
Graphical User Interface to Extrapolate the Ideal Covering Factor of the Polar Step
This paper treats some aspects of the geometrical design of salient synchronous generator, used in railway traction. It focus on the transformation of given experimental data curves into polynomial based regression model...
MODELLING OF ELECTROMECHANICAL CONVERTERS OF TRACTION USED ON ELECTRIC LOCOMOTIVES
The paper begins by presenting basic electrical diagrams of the main types of electric locomotives (with chopper and DC motors or with rectifiers and DC motors or with VVVF and induction motors IM or with self-controlled...
Modelling and Synthesis of Printed Circuit Boards Testing Systems based on Timed Hard Petri Nets
This paper presents a synthesis method for delay time evaluation in the printed circuit boards based on Timed Hard Petri Nets. For the specification and modeling of the delay time evaluation system, Timed Synchronous Pet...
Synthesis of the PID Algorithm for Control the Thermal Regime in the 3D Printer
In this paper it is described the automatic system for formation the small pieces from polymer, based on the principle of thermoplastic extrusion and it is proposed the graph – analytical algorithm for identification the...
“OPEN-ENDED LABORATORY” METHOD APPLIED IN THE CONCEPTION OF A TEST BENCH TO SIMULATE A DIESEL - ELECTRIC TRANSMISION
This paper describes the application of a creative method (open-ended laboratory) in a research team work, to create an experimental bench which could be used, with various objectives, in the study of Electrical Machines...