Options for the design of ACS
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Options for the design of ACS

Options for the design of ACS

Modern control systems turboprop engines are digital, electronic, performing all the functions of management by direct exposure to the regulatory authorities of the engine. The electronic controller performs control and monitoring functions of the gas generator and the propeller.

Different variants of the ACS:

- single-channel analog or digital electronic system with a developed hydromechanical part;

- two-channel electronic digital system with a simplified hydro-mechanical backup regulator;

- two-channel electronic digital system without hydromechanical reserve.

The ACS can be applied hydro super-system controller to protect against over-speed of the free turbine limit values ​​(anti-spin).

The system has two identical control channel A and B, each of which performs automatic control gas generator (SG), propeller (BB) and the control of a technical

GG and BB status. Each channel has an independent system of protection against the promotion of the free turbine (Res. Pst), and the gas generator (Res. PHG) and built-in control system (ICS), which provides in case of failure of the system reconfiguration and compensation failures.

Communication with the control system of the engine control systems of the aircraft via the aircraft's electronic control unit and interconnecting via digital communication lines.

In order to increase the availability of ACS sensors and electro-ravlicheskie converters run dual-channel (double-wound).

Fuel booster includes a centrifugal pump, a filter bypass valve, gear or piston high-pressure pump.

The working medium in the control system by turning the propeller blades used oil supplied pump disposed in the regulator screw or vane pump. The pump controller is supplied from the oil lubrication system of the engine, and in the vane pump - from a separate oil tank.

In modern control systems for turboprop (turbofan-engine) motors, the electronic controller has a speed of> 5 106. Op / s; The amount of RAM 8. .12 KB; The amount of permanent memory is 32 KB. It can operate for a long time at ambient temperatures from -55 to + 85. 125 ° C. The weight of the regulator is 6. .10 kg. The operating time of the controller for failure, leading to engine shutdown in flight> 300 thousand h, the failure of the rotor protection system from spinning> 106 h, to failure and damage detected on the ground and in flight> 6 thousand hours. Resource before the first overhaul And overhaul life> 6 thousand hours, assigned resource> 24 thousand hours, service life> 20 years.

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