No abstract

SummaryIn aerospace field, the economic realization of a spacecraft is one of the main objectives that should be accomplished by conceiving the optimal propulsion system and the best control algorithms. This paper focuses on the development of a viable adaptive control approach (ACA) for spacecraft motion trajectory (SMT). The proposed strategy involves the nonlinear mathematical model of SMT expressed in the central field, which is linearized by the Taylor expansion, and the second Lyapunov method to offer a high rate and unfailing performance in the functioning. The adaptive control system is composed of the cascade of adaptation loop and feedback control loop. When the spacecraft deviates from its reference trajectory model, the ACA acts on the control system to correct this deviation and follow the optimal reference trajectory. Therefore, when the states of the adjustable model are different from its reference values, then the error signal is provided as an input to the adaptation law, which contains the adaptation algorithm. The output will be the state variable feedback control matrix, which will be used to calculate the new control law vector. The efficiencies of the linearization procedure and the control approach are theoretically investigated through some realistic simulations and tests under MATLAB. The steady‐state errors of control between the reference model and the adjustable model of SMT converge to zero. Copyright © 2014 John Wiley & Sons, Ltd.

No abstract

Along now being constructed Western Europe to Western China (WEWC) Corridor big territories are totally uninhabited. It leads to absents of any central power supply. While transport infrastructure and control on the highways should be provided. The article is devoted to autonomous power grid of such road unit as a transport control post “Rubej”. Firstly, the scientific analysis of renewable energy sources of the republic of Kazakhstan and justification of exact power plants for the post is provided. After that the research is focused on a principle of power grid control. The “Multi-agent system” (MAS) technique was proven to be promising approach to the smart grid’s design. The one of the recently offered MAS techniques is the Holonic architecture. While it was adjusted only for power grids with central grid connection. In the article autonomous smart grid based on Holonic approach is offered and described. The optimization problem for the control of autonomous small-sized smart grid is reckoned. The achieved results can ease the control system’s design and scaling process, as it should be provided even for small-sized grids. In the end financial actuality is proved.

The article forms the conditions for the integration of modern microprocessor technology that implements the laws of standard regulation in a distributed control system with such intelligent algorithms as artificial immune systems (AIS). Within the framework of the formed conditions, the problem of synthesis of the I-PD regulator for a two-circuit control system for the technological process of natural gas purification from various impurities of the distillation column is solved. Figs.: 4. Tabl.: 1. Refs.: 14 titles.