Stability and dynamic accuracy GTD devices
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Stability and dynamic accuracy GTD devices

Stability and dynamic accuracy GTD devices

 

 

The requirements for stability and dynamic accuracy can be agreed in the construction of high-speed control of the gas temperature in the class of adaptive systems.

One embodiment of the adaptive control of gas temperature, developed by O. Gurevich and FD Golberg, contains in addition to the main control loop closed and open loop adjustment. Closed loop changes the basic adaptation algorithm in dependence on the operating mode of the system.

If there is a transient system for maximum dynamic accuracy is realized a structure in which the minimum is reached in inertia control channel. Near steady-state operation of the engine to achieve the required accuracy of the static coefficient Kt in the channel at the same time increases with increasing inertia control channel. In this case, the controller automatically sets the gain, which provide the necessary supply of sustainable management.

Changing the control algorithm is performed on a signal, characterizing the degree of approximation to the steady state.

Instrumental solutions in control systems.

Electronic digital control system.

Development of the architecture of the electronic control systems GTD associated with advances in electronic technology, the increase in the functions performed by the system, increasing integration with the onboard complex JIA.

Initially, the use of electronic engine controls have a full-sized hydro regulator capable of operating the engine in all modes, and an electronic control analog or digital type, carrying out a limited number of functions through direct management or supervisory scheme. Communication with on-board systems is performed, usually with the help of the analog lines.

The emergence of microprocessors and micro computers, capable of operating in the conditions of operation typical of the gas turbine engine, allowed the creation of digital systems that began to directly control the engine's regulating organs in all modes of its operation and to perform the functions of its operational diagnostics. The systems are built according to a centralized scheme. Communication with the board is carried out using a digital channel in the form of a serial code with a frequency of up to 100 kHz. In such a system, there may be a hydromechanical controller that performs backup functions when the electronic part of the system fails.

Creating a large scale integrated circuits, increasing their reliability for one or two orders of magnitude and speed in 10. .20 Time increase the amount of memory led to the creation of a new generation of highly reliable digital systems (also built on a centralized basis), which made it possible level of reliability in some cases refuse to use a backup hydromechanical regulator.

 

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