Features modern ACS TVGTD
Features modern ACS TVGTD

Features modern ACS TVGTD



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


- stabilization of the rotational speed of a free turbine when changing the power consumed by the main and tail rotor with limiting overshoots and dips in the main rotor speed within the specified limits (program)

- synchronization of operating modes of two engines

- direct limitation of the limiting values ​​of the parameters of the engine working process;

- protection of a free turbine from spin-up, elimination of surge and restoration of the engine operating mode when stalling;

- fixing the failure of one of the engines and the restructuring of the limiters of the limiting value of the parameters of the other engine for emergency operation;

- optimization of the main rotor speed according to flight conditions and helicopter load;

- 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 the event of a failure of the electronic regulator, ensures the preservation of the maximum engine power;

- two-channel electronic digital systems with a simplified hydromechanical backup system, during the operation of which, in the event of a failure of the electronic regulator, the engine power can be reduced by 15%. 20%. The system for protecting a free turbine from spinning up is hardware-based.


The main features of Advanced SAU TVGTD FADEC type are:

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

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

- the use of stepper motors as actuators, which ensure the fixation of the engine operating mode in the event of an electronic controller failure;

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

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

- the use of autonomous power generators to power the electronic units of the ACS;

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


Read all about the gas turbine engine


Blog and articles