Control systems TRDTSF
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Control systems TRDTSF

Control systems TRDTSF

 

 

Turbojet two-circuit engines with FKS are installed, mainly, on supersonic military aircraft (fighters, bombers). Among the requirements for the engines of these aircraft are a number of such that have a significant impact on the principles of management and construction of automatic control systems. These may include the requirements of obtaining maximum traction on unbroken and forced operation modes and high dynamism (to ensure a given task execution time, maneuverability); The conservation of gas turbulence under the action of a number of specific disturbances (the entry of a disturbed air flow to the engine input with uneven pressure and temperature fields, hot gases when weapons are used, etc.); Quick combat readiness (requires a short start-up time, obtaining the maximum thrust on a warm engine); Saving the resource of the hot part of the engine with a large number of cycles; Acceleration (reset, etc.). At the same time, the main requirements to the control system for ensuring the controllability of the engine, the stability and quality of the control processes, and the accuracy of regulation in the steady and transient modes of operation are also preserved.

Modern turbofan ACS provides:

- control on engine start modes (on the ground and in flight);

- control of fuel consumption GT into the main combustion chamber at steady-state and transient modes of engine operation in the range of operating modes from MG to PF;

- control of the angles of installation of the HA compressors <k at steady-state and transient modes of engine operation;

- control of the position of the adjustable flaps of the critical and outlet sections of the jet nozzle;

- control of air intake for turbine cooling;

- dosing and distribution of fuel through the FCC manifolds;

- increasing the reserves of the GDU engine and removing the engine from surging;

- engine control in case of failure of the electronic regulator;

- communication with the onboard engine monitoring and diagnostics system (BSCD), control systems and aircraft according to MKIO;

- self-control and diagnostics of ACS.

Typical turbofan control program shown below.

Modern control systems turbofans built mainly on centralized basis. Programs and control algorithms implemented in the software functionality of the electronic controller (ER).

Measurement signals from sensors after conversion and filtering, are fed in blocks forming control programs and for generating control algorithms. In addition to signals from the sensors to the electronic controller receives a series of discrete signals (start of the engine, the ignition of the afterburner of surge protection systems and others.).

 

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