Debugging method for improving failure working mode consistency of triplex-redundancy servo valves

Abstract

The invention discloses a debugging method for improving the failure working mode consistency of triplex-redundancy servo valves. The debugging method comprises the following steps of (1) conducting debugging to improve the failure state saturation flow before starting of first-redundancy failure debugging or when the first-redundancy failure flow curve of the redundancy servo valves is saturatedand the saturation flow is reduced obviously; (2) conducting debugging to improve the flow curve linearity when the redundancy servo valve first-redundancy failure flow curve has a turning point wherethe flow grain suddenly increases; and (3) conducting debugging to improve the consistency of different channel first-redundancy failure flow curves when the problems that different channel first-redundancy failure flow curve gains or inconsistent linearity occur to the redundancy servo valves arise. Through the debugging method, the servo valves can be debugged in a targeted mode, the debuggingefficiency is improved, and the good performance of the servo valves under the failure working state and the consistency of the working performance of the servo valves in different working modes are ensured.

Description

technical field [0001] The invention belongs to the technical field of three-redundancy servo valves for aerospace servo systems, and relates to a debugging method for a three-redundancy nozzle baffle-type servo valve, in particular to a debugging method for improving the consistency of a faulty working mode of a three-redundancy servo valve. Background technique [0002] With the further improvement of the reliability requirements of aerospace models, the three-redundant electro-hydraulic servo valve technology has been more and more widely used because it can meet the system requirements in the first-degree failure and is still controllable in the second-degree failure. Since the servo system cannot predict which pre-stage of the servo valve fails, the servo control parameters for the first-degree failure modes of different channels of the servo valve are uniformly preset. In order to ensure that the servo system fails in the case of any pre-stage of the servo valve All ca...

AI Technical Summary

Problems solved by technology

The original three-redundancy servo valve has poor linearity and inconsistent performance when there are first-degree failures in different channels. However, due to the lack of delivery tasks, there is no in-depth research on the causes of the problems, so in order to get a better first-degree failure during debugging Working performance, it is often necessary to repeatedly adjust the flow gain of each pre-stage separately to ensure that the first-degree failure mode has good consistency and good performance. However, with the wide application of three-degree servo valves, this original no Targeted debugging methods cannot solve the problem quickly and efficiently. At the same time, due to the unknown mechanism of the problem, effective measures cannot be taken to improve it in design and process. It consumes a lot of time and cost, and it is easy to cause a serious delay in the delivery schedule under the condition of tight batch production tasks

Images