Application of quasi-object control systems by angular position of airplane for the translation of airplane from horizontal flight in a glide slope approach

2008 ◽  
Vol 4 (18) ◽  
Author(s):  
В.И. Кашматов
Author(s):  
M. Herashchenko ◽  
S. Nesterenko ◽  
O. Isachenko ◽  
A. Los ◽  
O. Siryk

A special kind of use of UAVs as transport is their use to deliver the destruction means to the target on the battlefield, i.e. as strike unmanned aerial vehicles (UAVs), capable to inflict missile and bomb strikes on the enemy. Of particular interest are such drones, which do not require constant aiming at the target by the flight operator (ground pilot) with the help of a video transmitting system, but are targeted independently. Such UAVs have onboard a target sighting sensor (coordinator), with which the onboard control system determines the angular position of the target relative to the UAV. It is necessary to determine the most optimal targeting algorithms to be used in onboard control systems. UAVs due to the successful combination of cheap goods, technological availability and availability of other technical indicators (load capacity, efficiency and duration of flight, maneuverability) can be used as vehicles for cargo delivery. For example, UAVs are used to deliver ammunition and medicine to victims. The mechanism of the primary notification to the on-board control system of the UAV of the coordinates of the target to be hit, ie the task of "primary targeting", remains not completely solved by the technical and organizational task when using strike UAVs. Targeting methods using the on-board video broadcast system and direct commands of the ground pilot require, firstly, the installation of appropriate payload on board with an understanding of the loss of this equipment in combat use of UAVs, and secondly, effective avoidance of radio suppression by the enemy. The article presents the results of modeling with the help of Simulink models of the processes of guidance of a strike UAV with targeting on a moving aim by two methods: direct guidance and dynamic bias. The trajectories of UAV flights during diving to the target were obtained. The changes in the main working parameters during the guidance process were obtained as well. The conclusion about the advantage of the method of dynamic bias is made.


Author(s):  
О. Klyuyev ◽  
A. Sadovoi ◽  
Y. Sokhina

In asynchronous electric drives with vector control on the rotor, it is necessary to calculate the value of the sine and cosine of the angle of rotation of the rotor relative to the stator to form control actions. When using angle sensors, complex structural tasks can arise — placement and reliable mounting of the sensor on the shaft and, accordingly, the task of the overall layout of the unit. For high-power machines, the tasks of developing and creating the design of the sensor itself arise. If serial rotor angular position sensors can be used, the task of placing and mounting the sensor is no less difficult. In these cases it is necessary to deduce the second end of a shaft from the case of the engine with contact rings that complicates its design. Therefore, the urgent need to create more reliable electric drives with vector control systems on the rotor is the synthesis of identifiers of the angle of rotation of the rotor. Identifiers are known whose calculation algorithms are based on determining the projections of the flow coupling vectors. In the work with the use of coordinate transducers of projections of stator or rotor current vectors and equations of electromagnetic circuits of an asynchronous machine, the synthesis and subsequent analysis of the properties of the rotor position angle identifier in vector control systems of dual power machines is performed. New equations of the identifier of flux couplings are received, its stability is investigated and on conditions of stability types of electric drives in which it is possible to apply the offered identifier are defined. The stability of the vector control system and sufficient identification accuracy when using the proposed equations and functions are confirmed by the method of mathematical modeling of the recommended electric drive systems in different operating modes.


Author(s):  
L P Myshlyaev ◽  
A V Tsyryapkina ◽  
V N Burkov ◽  
K A Ivushkin

Author(s):  
E.S. Duvanov ◽  
◽  
Yu. I. Kudinov ◽  
I.Yu. Kudinov ◽  
A.A. Ponomarev ◽  
...  

The article deals with the comparative analysis of the quality of adaptive thermal object control systems with reference models using the modified MIT rule and Lyapunov rule, implemented in MATLAB-Simulink software complexes (PCs). The proposed control algorithms were tested in laboratory condi-tions and provided the required quality of transition process in a thermal object.


2021 ◽  
Vol 2131 (4) ◽  
pp. 042080
Author(s):  
M V Tchavychalov ◽  
A E Nabokov ◽  
I V Bolshikh

Abstract The article describes the currently used approaches to mathematical modeling of switched reluctance electric machines. It is shown that the traditional approach uses a large amount of initial information on the dependence of the flux on the current and the angular position of the rotor in the form of lookup tables. It is proposed to use the description of the flux using the hyperbolic arcsine function. This approach will reduce the amount of preliminary information and thus simplify the procedures for configuring control systems.


Sign in / Sign up

Export Citation Format

Share Document