Electrohydraulic amplifier drawings

Contents

1. Terms of Reference

2. Introduction

3. Justification of operating fluid type and operating pressures selection

4. Energy calculation of the drive

5. Justification of EGSP scheme selection

6. Description of operating principle

7. Calculation of the main design parameters of the drive

8. Summary table of the main parameters of the drive and its elements

9. Calculation of static and energy characteristics

10. Making Differential Equations of Linearized Model

11. Calculation of transmission coefficients and time constants of dynamic links

12. Building a Transition Process

13. Conclusion

14. List of literature used

Introduction.

In modern aircraft control systems, hydraulic actuators are used as actuators. The specificity of the technical requirements for layout, load, dynamics and reliability leads to the fact that for each new type of aircraft it is necessary to design special steering machines and hydraulic control systems. In this design, the hydraulic drive is a set of devices, which includes a hydraulic cylinder, a control device (throttling hydraulic distributor and electromechanical converter), a power source (pump with a driving engine) and which is designed to drive mechanisms and machines using working fluid under pressure.

The advantages of a hydraulic actuator over other actuators, including electrical actuators, derive from the very principle of fluid energy transfer.

One of the main advantages of hydraulic drives is a high voltage level (pressure, in this project I took the hydraulic drive operating at a pressure of 28.8 MPa) of the working medium (working fluid), which creates a force on the actuator (hydraulic cylinder ).

In addition, the inertial forces resulting from the movement of the piston of the hydraulic cylinder are significantly less than the inertia forces on the rotor of the electric machine. This, in turn, determines the advantage of the hydraulic drive in terms of speed and available accelerations. Hydraulic drive is a drive of high accelerations and high speed.

Another important advantage of the hydraulic drive is the low weight of hydraulic machines per unit of useful power.

The low sliding and high stiffness of the load (mechanical) characteristics, which determine the stability of operation when changing the value and sign of the load, is also an important advantage of the hydraulic drive.

The advantages also include a large power gain (for the designed drive 〖 K 〗 _ gu = 34818) and a relatively high value. which sometimes reaches 5070%, and the possibility of using the simplest hydraulic engines in the form of hydraulic cylinders, which greatly simplifies and reduces the cost of the drive.

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