Performance of different Formation control methods between Multiple Spacecraft with local part communications

With the development of network and distributed computing, many applications of multi vehicle system have become possible, and motion transformation can be realized. In multi vehicle coordination, the interaction between information exchange topology and control plays an important role. Different formation control methods have different performance. Thus, in order to figure out which method is suitable for multiple spacecraft, the author simulated the signal unstable environment in space to test the robustness and consensus speed of the following three methods. The author use Bearing-only Formation Control, A leader–follower Formation Control and Affine Formation Control to test their performance with local part communications. The author use matlab and simulink to analog communication process of multiple spacecraft. Finally, the author find Affine Formation Control’s performance is the best. It has the best robustness and the fast consensus speed but more energy and signal paths to communicate.

REVITALISASI KOMUNIKASI ANALOG DI KOMUNITAS KELUARGA MUDA INDONESIA

Handwritting into book is the most ancient form of analog communication and a means of remote communication that was first present in human life. However, just like any other communication product, writing on books (journaling) slowly begins to be eroded by technology dermination. The culture of analog writing shifts to typing. The decline in interest analog writing is seen from the results of research and regulations in some countries that no longer require the younger generation to have certain skills of writing. In fact, analog writing activities are scientifically proven to be mentally healthy. The situation in Indonesia is slightly different from the presence of the government that requires handwritten classes for elementary children, and the growing writing market in young family communities. Journaling in the millenial mother community is a process to get a more conscious lifestyle. This research aims to understand the revitalization process of an analog communication to remain favored by people who have become accustomed to consuming communication information technology. Through the Case Study it was found that journaling as analog communication is able to maintain its existence because of the revitalization of ideas through interdisciplinary and multidisciplinary collaboration in the scope of communication science.

A new 4-D hyperchaotic hidden attractor system: Its dynamics, coexisting attractors, synchronization and microcontroller implementation

In this paper, a simple 4-dimensional hyperchaotic system is introduced. The proposed system has no equilibria points, so it admits hidden attractor which is an interesting feature of chaotic systems. Another interesting feature of the proposed system is the coexisting of attractors where it shows periodic and chaotic coexisting attractors. After introducing the system, the system is analyzed dynamically using numerical and theoretical techniques. In this analysis, Lyapunov exponents and bifurcation diagrams have been used to investigate chaotic and hyperchaotic nature, the ranges of system parameters for different behaviors and the route for chaos and coexisting attractors regions. In the next part of our work, a synchronization control system for two identical systems is designed. The design procedure uses a combination of simple synergetic control with adaptive updating laws to identify the unknown parameters derived basing on Lyapunov theorem. Microcontroller (MCU) based hardware implementation system is proposed and tested by using MATLAB as a display side. As an application, the designed synchronization system is used as a secure analog communication system. The designed MCU system with MATLAB Simulation is used to validate the designed synchronization and secure communication systems and excellent results have been obtained.

JAWARA Application: Does Digital Guide Feel Like Analog Communication Based Guide?

This study examined the differences between analog communication models played by human tour guides versus digital communications aided by digital guides called JAWARA applications in the guidance of the botanical garden. This study examined whether digital guide feels like a guide that communicating analogously, and observed the changes in the way they are guiding and whether it also impacts the cultural change from analog to digital. The theoretical framework used is interpersonal communication theory versus complexity theory based on communication models in digital media. Furthermore, this study is conducted from the cultural context and digital culture by descriptive qualitative research method. The primary data source is the interview with JAWARA admin and application developer. Results showed that the guidance communication model in the botanical garden underwent significant changes with the presence of JAWARA digital guide applications. These changes occur due to the analog and digital guidance communication models have different characteristics. However, the presence of digital guides has not been able to replace the analog guide completely because digital guides have not felt like analog (human) guides. However, the presence of digital guide applications brings changes to the cultural context, which was previously analogous as a whole, will gradually be displaced by the presence of digital culture and then mixed.

AUTOMATIC DEVICE FOR REAL–TIME SWITCHING TO RESERVE RADIO CHANNEL

Guaranteed delivery of information via communication channels remains an urgent task for a number of industries. However, automatic transition to the reserve for analog communication channels requires non‑standard solutions. In the proposed device, the decision on switching to the reserve is made on the basis of spectral analysis of signals transmitted via the main and backup communication channels. A wired communication channel is considered as the main channel, and a wireless broadband access channel is used as a backup channel. The signal transmitted over the wireless broadband access is taken as a reference because it is of high quality and which we can influence when building a network. The spectrum of analog signals is calculated on the basis of the fast Fourier transform, the implementation of which is carried out in the analog signal block based on the STM‑32 microcontroller. The device provides a transition to the reserve in real time.