Automation of ship power plants

Contents

Introduction

1 Algorithmic calculation of SAR SGP "Benjamin Franklin" submarine

1.1 Development of ECS schematic diagram. Description of the action

1.2 Determination of SGP ECS transfer function

1.3 Assessment of SAR stability

1.3.1 Lyapunov's theorem

1.3.2 Hurwitz criterion

1.3.3 Mikhailov criterion

1.4 Construction of SGP ECS frequency characteristics

1.5 Construction of transient curve by frequency method. Quality assessment of management processes

1.6 Simulation of ECS on PC

2 Algorithmic calculation of SAR STP "Benjamin Franklin" submarine

2.1 Development of ECS schematic diagram. Description of the action

2.2 Determination of ATS transfer function

2.3 Assessment of SAR stability

2.3.1 Lyapunov's theorem

2.3.2 Hurwitz criterion

2.3.3 Mikhailov Criterion

2.4 Construction of SGP ECS frequency characteristics

2.5 Construction of transient curve by frequency method. Quality assessment of management processes

2.6 Simulation of STP ECS on PC

3 Development of schematic diagram and protection mechanisms

3.1 Development of schematic diagram

3.2 Development of ATS protection mechanisms

3.1 CG rods

Conclusion

List of used literature

Assessment of SAR stability

Sustainability is an important indicator of ATS. The main purpose of the ECS is to maintain a given constant value of the controlled parameter or change it according to a certain law. If the adjustable parameter deviates from the specified value (for example, under the influence of external disturbance or task change), the regulator acts on the system in such a way as to eliminate this deviation.

If the system as a result of this action returns to the initial state or goes into another equilibrium state, then such a system is called stable. If oscillations occur with an increasing amplitude or a monotonous increase in error "e" occurs, then the system is called unstable. The following criteria are used to determine whether the system is stable or not:

We evaluate the stability of the SAR PPU according to three criteria: Lyapunov's theorem, Gurvitz's criterion and Mikhailov's criterion.

Conclusion

In this course work, algorithmic calculations were made of the automatic control systems of the steam production and steam turbine installation of the ship: Schematic diagrams of the ATS have been developed; ECS transfer functions are defined; assessment of SAR stability according to Lyapunov's theorem, Gurvits and Mikhailov's criteria, frequency characteristics of SAR were built; transient curves are constructed by frequency method. During the simulation of ECS on PC, their adjustment was made. Control time for ECS SGP was obtained 38 seconds, control error 1.5%, overregulation 13%, for ECS STP - control time 39 seconds, control error 1.6%, overregulation 15%.

Developed: ROZ schematic diagram and NR protection mechanisms. CG rods were designed.