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SIMULINK based parameter influence degree analysis method of load simulator

A load simulator and analysis method technology, applied to controllers with specific characteristics, electric controllers, etc., can solve problems such as less reverse thinking, dependence on linear transfer functions, weak attention to system performance, etc., to improve parameters The effect of influence analysis method

Active Publication Date: 2019-03-05
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0009] The purpose of the present invention is to provide a load simulator parameter influence degree analysis method based on SIMULINK, which solves the problem that the influence degree analysis of the existing electro-hydraulic load simulator is too dependent on the linear transfer function, the attention to the system performance is slightly weak, and the reverse is less thinking to characterize issues such as performance changes

Method used

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  • SIMULINK based parameter influence degree analysis method of load simulator
  • SIMULINK based parameter influence degree analysis method of load simulator
  • SIMULINK based parameter influence degree analysis method of load simulator

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Embodiment

[0075] The parameters of the dual vane hydraulic motor force control load simulator are:

[0076] A=2×10 -4 m 3 / rad, B=800N m s / rad, β e =2×10 8 Pa, C t =9×10 -12 m 5 / (N·s), P s =21×10 6 Pa, P r = 0 Pa, V 01 =V 02 =1.7×10 -4 m 3 , J=0.32kg·m 2 .

[0077] Comparing the simulation results: during the simulation, the parameter P in the PID controller is mainly adjusted, and the parameters of the PID controller designed by the present invention are selected as: P=0.05, I=0, D=0.

[0078] The time-varying external disturbance of the system is selected as d=200sint, and the trajectory is The high-frequency torque command that the system expects to track is a curve The low frequency torque command is

[0079] Figure 5 It is the high frequency torque command curve (5HZ) of the system. Figure 6 is the curve of the system tracking error changing with time. It can be seen that the tracking error is bounded and convergent, and this bound is very small compared...

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Abstract

The invention discloses a SIMULINK based parameter influence degree analysis method of load simulator, and belongs to the field of electro-hydraulic servo control. Different from a traditional linearanalysis method, the coherent nonlinearity of a hydraulic system is analyzed, modeling is carried out in MATLAB / SIMULINK, the influence degree of nonlinear parameters in the system is analyzed, and influence characteristic of main parameters in the system on system performance is obtained by taking the change rate of the nonlinear parameters as an independent variable and a tracking error and bandwidth of the system as dependent variables. The method has the advantages of rapid and accurate parameter analysis, the SIMULINK analysis method overcomes the defects including complicated formula andlow parameter analysis efficiency of the traditional analysis method, the nonlinear parameter influence degree analysis method of the hydraulic load simulator is simple and practical, and the methodcan be used to guide design and experiment of the hydraulic system.

Description

technical field [0001] The invention belongs to the field of electro-hydraulic servo control, in particular to a SIMULINK-based analysis method for parameter influence degree of a load simulator. Background technique [0002] The load simulator is used to simulate the aerodynamic moment on the rudder surface of the aircraft and other moving objects during flight and movement. It is one of the important ground simulation equipment for missile and other weapon systems. The load simulator is also called the force / torque servo loading system, which belongs to the category of force / torque servo control system and has a structure similar to that of the ordinary force / torque servo system. A general load simulator mainly includes a servo controller, an actuator, and a detection element. The core of the simulator is the servo controller, and the expected output of the system is the loading force / torque. [0003] According to the different loading actuators, load simulators can be di...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 罗成洋徐强
Owner NANJING UNIV OF SCI & TECH
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