Control method for improving robustness of steering engine dynamic stiffness test system

Abstract

The invention provides a control method for improving robustness of a steering engine dynamic stiffness test system. The principle is as follows: a feedback system is added in the steering engine dynamic stiffness test system, an instruction of a main control valve core / motor controller for controlling the position change of a loaded object actuating mechanism is extracted, a feedback signal is formed after certain processing, and the feedback signal is integrated with a loading instruction signal to control the loaded object actuating mechanism. The method is suitable for force tracking precision applied to a low-frequency (0.1 Hz to 8 Hz) loading stage, and a more satisfactory test effect can be obtained by adjusting control parameters of the steering engine dynamic stiffness test systemfor different loaded objects. According to the control method, the trouble caused by non-instructive position disturbance is solved, the control method is suitable for different loading objects, andthe robustness of the system is improved.

Description

technical field [0001] The invention belongs to the field of automatic control, in particular to a control method for improving the robustness of a rudder motor stiffness test system. Background technique [0002] The rudder motor stiffness test system is a feedback control system. In the process of applying force loading, the loaded object is ideally at a fixed position. However, in the actual test process, the loaded object has certain abnormalities in the low-frequency loading stage Command position disturbance, the root cause of this phenomenon is that there is strong interference between the internal and external environment on the main control valve spool / motor controller. As a result, the loading force cannot be accurately tracked, which brings certain difficulties to the analysis of the dynamic stiffness data at the low frequency stage. At the same time, when the rudder motor stiffness test system is used for different types of loaded objects, the degree of position...

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Problems solved by technology

[0002] The rudder motor stiffness test system is a feedback control system. In the process of applying force loading, the loaded object is ideally at a fixed position. However, in the actual test process, the loaded object has certain abnormalities in the low-frequency loading stage Command position disturbance, the root cause of this phenomenon is that there is strong interference between the internal and external environment on the main control valve spool / motor controller

This results in the inability to accurately track the loading force, and brings certain difficulties to the analysis of the dynamic stiffness data at the low frequency stage

At the same time, when the rudder motor stiffness test system is used for different types of loaded objects, the degree of position disturbance is also quite different. Adjusting the control parameters of the rudder motor stiffness test system cannot achieve satisfactory results, and the robustness is poor.

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