Space systems. Simulation requirements for control system

2013 ◽  
Keyword(s):  
Control System ◽  
Space Systems ◽  
Systems Simulation

scholarly journals Design, Ground Testing and On-Orbit Performance of a Sun Sensor Based on COTS Photodiodes for the UPMSat-2 Satellite

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4905
Author(s):  
Angel Porras-Hermoso ◽  
Daniel Alfonso-Corcuera ◽  
Javier Piqueras ◽  
Elena Roibás-Millán ◽  
Javier Cubas ◽  
...  
Keyword(s):  
Control System ◽  
Attitude Control ◽  
Response Curve ◽  
The Sun ◽  
Space Systems ◽  
Attitude Control System ◽  
Ground Testing ◽  
Sun Sensor ◽  
Early Results ◽  
Red Leds

This paper presents the development of the UPMSat-2 sun sensor, from the design to on-orbit operation. It also includes the testing of the instrument, one of the most important tasks that needs to be performed to operate a sensor with precision. The UPMSat-2 solar sensor has been designed, tested, and manufactured at the Universidad Politécnica de Madrid (UPM) using 3D printing and COTS (photodiodes). The work described in this paper was carried out by students and teachers of the Master in Space Systems (Máster Universitario en Sistemas Espaciales—MUSE). The solar sensor is composed of six photodiodes that are divided into two sets; each set is held and oriented on the satellite by its corresponding support printed in Delrin. The paper describes the choice of components, the electrical diagram, and the manufacture of the supports. The methodology followed to obtain the response curve of each photodiode is simple and inexpensive, as it requires a limited number of instruments and tools. The selected irradiance source was a set of red LEDs and halogen instead of an AM0 spectrum irradiance simulator. Some early results from the UPMSat-2 mission have been analyzed in the present paper. Data from magnetometers and the attitude control system have been used to validate the data obtained from the sun sensor. The results indicate a good performance of the sensors during flight, in accordance with the data from the ground tests.

Perfect control for right-invertible Grünwald-Letnikov plants – an innovative approach to practical implementation

2019 ◽  
Vol 22 (2) ◽  
pp. 424-443 ◽  
Author(s):  
Wojciech Przemysław Hunek
Keyword(s):  
Fractional Order ◽  
Control Algorithm ◽  
Mimo System ◽  
Practical Implementation ◽  
Space Systems ◽  
Order Model ◽  
Integer Order ◽  
Fractional Order Model ◽  
State Space Systems ◽  
Systems Simulation

Abstract A new perfect control algorithm dedicated to fractional-order right-invertible systems, i.e. plants with a greater number of input than output variables, is presented in this paper. It is shown that such a control strategy can be particularly applied with regard to practical tasks. Henceforth, the Grünwald-Letnikov difference operator Δα of an assumed order α can be truncated without loss of generality. For that reason, the so-called pole-free perfect control formula can be used to minimize the essential drawback of the Grünwald-Letnikov approach engaged, so as to define the intriguing issue regarding the robust perfect control for non-integer-order right-invertible LTI discrete-time state-space systems. Simulation examples show that the presented method can compete with a classical stable-pole one, for which the actual systems described by a fractional-order model often correspond with an inconvenient asymptotic perfect control solution given by the unlimited original operator Δα. In the end, the possibility of employing of author’s nonunique right inverses dedicated to nonsquare MIMO system matrices is demonstrated, thus giving rise to the introduction of a new powerful tool for robustification of non-integer-order closed-loop perfect control plants as well.

Innovative Teaching Research on the Course of Intelligent Control System and Simulation

2013 ◽  
Vol 709 ◽  
pp. 441-444
Author(s):  
Zhao Yang Yang ◽  
Jie Chen ◽  
Pan Wang
Keyword(s):  
Control System ◽  
Control Systems ◽  
Intelligent Control ◽  
Teaching Model ◽  
Innovative Teaching ◽  
Teaching System ◽  
Intelligent Control System ◽  
Teaching Research ◽  
Systems Simulation ◽  
And Control

Innovative teaching research on the teaching system of intelligent control and control systems simulation is developed: based on the principle of methodological integration, a teaching model in classroom with seminars is established; an intelligent teaching software system is developed for effectively supporting the teaching.

scholarly journals THE EXPERIENCE OF "MATLAB 6.0"® USE IN THE SIMULATION OF THE PULSE-PHASE CONTROL SYSTEM OF THE THYRISTOR VOLTAGE REGULATOR WITH THE ACTIVE-INDUCTIVE LOAD

2014 ◽  
pp. 76-81
Author(s):  
Abdelaziz Hamzaoui ◽  
Artem Melikhov ◽  
Vadim Tsukanov ◽  
Yuriy Kolokolov
Keyword(s):  
Control System ◽  
Dynamic Systems ◽  
Structural Model ◽  
Phase Control ◽  
Voltage Regulator ◽  
Inductive Load ◽  
Special Instrument ◽  
Pulse Phase ◽  
Systems Simulation

The paper is dedicated to the realization of the structural model of the pulse-phase control system (PPCS) of the thyristor voltage regulator (TVR) with an active-inductive (RL) load in the medium of "MATLAB 6.0" ® Describing the possibilities of "MATLAB 6.0" ® in the dynamic systems simulation, some problems connected with the use of special instrument means, included in structure of Toolbox Simulink Library, are examined.

scholarly journals Parametric Schedulability Analysis of a Launcher Flight Control System under Reactivity Constraints*

2021 ◽  
Vol 182 (1) ◽  
pp. 31-67
Author(s):  
Étienne André ◽  
Emmanuel Coquard ◽  
Laurent Fribourg ◽  
Jawher Jerray ◽  
David Lesens
Keyword(s):  
Control System ◽  
Flight Control ◽  
Formal Model ◽  
Schedulability Analysis ◽  
Model Parameters ◽  
Space Systems ◽  
Model Checker ◽  
Development Cost ◽  
Flight Control System ◽  
Space Launcher

The next generation of space systems will have to achieve more and more complex missions. In order to master the development cost and duration of such systems, an alternative to a manual design is to automatically synthesize the main parameters of the system. In this paper, we present an approach for the specific case of the scheduling of the flight control of a space launcher. The approach requires two successive steps: (1) the formalization of the problem to be solved in a parametric formal model and (2) the synthesis of the model parameters with a tool. We first describe the problem of the scheduling of a launcher flight control, then we show how this problem can be formalized with parametric stopwatch automata; we then present the results computed by the parametric timed model checker IMITATOR. We enhance our model by taking into consideration the time for switching context, and we compare the results to those obtained by other tools classically used in scheduling.

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