Control systems TRDTSF
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 GTv main combustion chamber on 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 compressors ON <k in steady and transient modes of engine operation;

- position control of the adjustable shutters of the critical and output sections of the jet nozzle;

- management of air extraction for cooling the turbine;

- dosing and distribution of fuel in collectors of the FCC;

- increase stocks of the engine GDU and the engine output from the surge;

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

- communication with the onboard monitoring and diagnostics system of the engine (BSKD), systems of SU and aircraft on the MKIO;

- self-control and diagnosis 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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