Features modern ACS TVGTD
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Features modern ACS TVGTD

Features modern ACS TVGTD

Given these requirements, the functions of modern TVGTD ACS, the main ones are:

- stabilization of the frequency of rotation of a free turbine when the power consumed by the main and tail rotors is changed with restriction of casts and speed rotations of the main rotor within the specified limits (program)

- synchronization of operating modes of two engines

- direct limitation of the limiting values ​​of the parameters of the engine workflow;

- protection of the free turbine from the promotion, the elimination of the surge and the restoration of the engine during deafening;

- fixing the failure of one of the engines and the adjustment of the limiters of the limiting values ​​of the parameters of another engine for emergency operation;

- optimization of the frequency of rotation of the main rotor under the flight conditions and helicopter loading;

- detection and compensation of failures in the control system.

Program Control helicopter turbine engine and the characteristics of ACS management programs similar to the gas generator of the turboprop.

Computing power of modern digital electronic automatic control system allow you to implement the necessary set of control algorithms, control and diagnostics of technical condition of the engine. The focus of the development of digital FADEC type ACS is paid to the reliability of the system and, above all, safe operation of the engine.

Currently, the following variants of the ACS TVGTD:

- single-channel electronic digital systems with a developed hydromechanical part, which in case of failure of the electronic regulator ensures the preservation of maximum engine power;

- two-channel electronic digital systems with a simplified hydromechanical backup system, during operation of which in the event of an electronic regulator failure it is possible to reduce engine power by 15%. 20%. The protection system of the free turbine from spin-up is performed autonomously by hardware.

The main features of Advanced SAU TVGTD FADEC type are:

- use instead of hydromechanical backup regulator of the third simplified electronic channel;

- the use of autonomous systems of protection against the promotion of the rotors of the engine;

- use as actuators of stepper motors, ensuring the fixation of the mode of operation of the engine in case of failure of the electronic controller;

- hardware integration of control systems and monitoring the technical condition of the engine;

- the use of electronic torque meters (torque), the torsion of which is built into the engine;

- the use of autonomous power generators for powering electronic components of ACS;

- duplication of the sensors of the main parameters of the engine and actuators of the electronic system.

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