نشریه صنایع الکترونیک
پیاپی 1 (بهار 1389)

One of the most important concepts in constant target tracking of different equipment Which have inertical bodies viewed from a moving platforms is their picture stabilization. In this paper a new method for cinematic equations resolving is presented in which the angular errors are obtained to correct body movement and to optimize the constant tracking.which uses specific view.fur ther more of using identification system In determining of dynamic model of meters for designing the controller and dead zone reduction are applied such that the steady state error is minimized and the rise time is reduced and the wine sliding is decreased. Practical results at the gyroscope (experimental type) show good performance of the system.

In this article we consider data-dependent rotation (DDR) as a vectorial boolean function and show that all its component functions are algebraic degree k+1 where 2k is the bit-length of its operands. Besides, we obtain the algebraic normal form (ANF) of the component functions. These results give us insight into the algebraic nature of this seemingly complex operation and have applications in studying higher order differential attacks on block ciphers like RC5 which heavily rely on DDR as their main building block, and may possibly be used in mounting Courteous algebraic attack on such ciphers.

The sinuous antennas have a numerous applications in military and civil systems such as direction finding, research and measurement laboratories and reflector feeds; which are due to their superior broadband characteristics and simultaneous right and left hand circular polarization. These capabilities are most required in radars and aerospace applications. Although, the sinuous antenna size, bandwidth, and radiation parameters are the same as spiral antenna, due to complex structure and complicated feeding network, the sinuous parameters do not investigated accurately. In this paper, a comprehensive survey on the antenna parameters has been proposed. Based on these studies, design, construction and measurements of an optimized planar sinuous antenna for 1–5 GHz frequency range have been presented.

Within operational life of satellites according to their mission, need to change their operational orbits. This change can includes change in semimajor axis, inclination or plane of orbit (RAAN angle). For this propose, we can use Electrical Propulsion (EP). With respect to light weight of EP in cases which there is weight constraint, we use EP for transfer satellite to desired orbit. In this paper, we consider minimum-time transfer problem for these transfers. Initial and final orbits are circular and we assume thrust is continuous. with constant acceleration, elements of orbit uniformly change and these changes analyze with Edelbaum Analysis.

Technology of MEMS parts and Micronics systems has the ability to make drastic change in the life of human being.Employment of this technology in military fields, in addition to various trading fields has earned a stabilized status among developed and certain developing countries.This technology has emanated from that of microelectronic technology based on siliceous chips. Certainly it will be impossible for Iran to join the group of developed countries in future without treading the path experienced by the frontline countries developed in technology. Therefore, the key technology of microelectronics should be considered from a research, military and development rather than a merely trading perspective.Some investments have been made in semi-conductors in Iran during the past years. Such investment potential can be used as appropriate bedrock by creation of a unified scientific management.Removal of certain shortcomings and making optimal use of joint scientific cooperation between university and industry will make it possible to achieve proportional progress in this technology within a short period of time.

In this paper, multiagent reinforcement learning has been used in wargame simulation. Military organization causes priorities in actions taken among agents in the feild. Decision making among n-person generalsum multiagent systems with consecutive action selection can be modeled through extensive form games. The existing process of learning can be considered as a set of successive extensive form games with Markov property. We use subgame perfect equilibrium points as optimal joint action using the well-known backward induction algorithm. An estimation of possible utilities gained over a game with respect to other agents’ preferences, called as associative Q-values, is used to predict optimal action. Simulation results present the effectiveness of the proposed algorithms in wargame simulation.

Quantum Cellular Automata (QCA) represents an emerging technology at the nanotechnology level. Nowadays, many applications of QCA technology are introduced and cryptography can be an interesting application of QCA technology. The original encryption algorithm for GSM was A5/1. Here, we have implemented the A5/1 stream cipher using QCA technology. Simulation results are obtained from soft ware of QCA Designer.