NATIONAL AVIATION UNIVERSITY
AEROSPACE CONTROL SYSTEMS INSTITUTE
DEPARTMENT OF AVIATION COMPUTER INTEGRATED COMPLEXES
Dead reckoning computer АНУ-1
The basic navigation concepts
Modes of operation of АНУ-1
1. Autonomous dead reckoning mode
4.1 Zero-layer of Block diagram
3.3 Front Panel of our model of dead-reckoning computer
4.4 Second Layer
- Airspeed sensor НИ-50БМ ДВС;
- Selector of map angle ЗУК-1;
- Wind selector ЗВ-1;
- Counter НИ-50 сч;
- Temperature receiver П-1;
- Switching unit БК-1.
Functional diagram of АНУ-1 is shown in Figure 2.
Airspeed sensor НИ-50БМ ДВС is designed to determine the true airspeed V and to output the voltage proportional to this speed.
Selector of map angle ЗУК-1 is designed to enter the heading ( automatically from the compass system, as well as to form the angle ((-() when map angle is entered manually.
Wind selector ЗВ-1 is intended to enter the speed U and direction ( of wind into the scheme of АНУ-1 during operation in autonomous mode. The expansion of the wind vector U is done with respect to the axes of the chosen coordinate system. The data needed to solve this problem is the wind speed, wind direction and map angle map that are introduced manually into the selector. For this the device has a handle and scale of wind speed U (0-200 km / h) with scale factor in 5 km/h and the handle and scale of the wind direction ( (0-360() with a scale factor 5(. The scale of the wind direction simultaneously serves to set the map angle (.
Fig. 2 1 – electrical circuit of АНУ-1, 2 – simulator of heading, 3 - simulator of track angle, 4 - ground speed simulator, 5 - simulator of temperature receiver, 6 - control display unit, 7 - switching unit БК-1, 8 – test jacks for voltage measurement, 9 - wind selector ЗВ-1, 10 – counter НИ-50 сч, 11 - selector of map angle ЗУК-1, 12 – indicator of airspeed НИ-50БМ ДВС, 13 – checkout equipment КПУ-3, 14 - switch , 15 - voltmeter, 16 - clamp of the pipeline.
The counter НИ-50БМ is the main indicator of dead reckoning computer. It gives the information about the current coordinates of the aircraft at any given time moment in kilometers of traveled path. With working АНУ-1 in the main mode (DN mode), as well as in the MEMORY mode the integration of DC voltage, proportional to the components Wx, Wy and ground speed, is done over time in a conventional Cartesian coordinate system. In autonomous mode of АНУ-1 the counter performs the algebraic addition of the components Vx and Vy of true airspeed and components Ux and Uy in a conventional Cartesian coordinate system. Integration in the counter is done by means of integrating motors.
The temperature receiver П-1 is used to measure and convert the outdoor temperature into voltage and feeding it into an electrical circuit of airspeed indicator.
The switching unit БК-1 is a set of same computing units that perform the generation of components Wx and Wy of ground speed of the aircraft in a conventional Cartesian coordinate system at any operation mode of АНУ-1.
The switching unit includes the following components:
- Heading unit УОК;
- Ground speed unit УОПС;
- track angle unit УОПУ;
- "memory of wind" unit УПВ.
At the same time the switching unit serves for connection of...