Semi-physical real-time simulation system of airplane reverse thrust hydraulic unit

Abstract

The invention discloses a semi-physical real-time simulation system of an airplane reverse thrust hydraulic unit. A closed loop testing system mainly comprises a computer, a programmable logic controller (PLC) hardware platform, an input device, and a software simulation device arranged in the computer; submodels of a hydraulic system are built by utilizing a hydrokinetics and electronic control theory, and then each simulation submodel forms the software simulation device; the PLC hardware platform performs parameter control and logic control to the software simulation device according to a state signal of the input device, and the output quantity of the software simulation device is shown in the computer by a digital and cartoon mode and also used as a feedback signal to be fed back to the PLC hardware platform through a communication interface. The invention can test and analyze various parameters of the airplane reverse thrust hydraulic unit without preparing the hydraulic unit, thereby greatly shortening the developing and analyzing periods of the reverse thrust hydraulic unit, improving the design quality and reducing the test expense.

Description

technical field [0001] The invention relates to a semi-physical simulation system for simulation analysis and testing, in particular to a semi-physical real-time simulation system for simulation analysis and testing in the design process of an aircraft reverse thrust hydraulic device. Background technique [0002] The aircraft anti-thrust hydraulic device is the executive part that changes the jet direction of the aircraft, and is used to achieve rapid deceleration when the aircraft lands, thereby reducing the length of the runway. The reliability requirement of this device is very high, and involves many fields such as machinery, control and hydraulic pressure. The test and analysis of the device needs to consume a lot of manpower, material resources and financial resources. The difficulty lies in: firstly, in the early stage of hydraulic device design, when the physical system of the whole device is incomplete, physical testing cannot be carried out; secondly, due to the ...

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Problems solved by technology

The testing and analysis of the device requires a lot of manpower, material and financial resources

The difficulty lies in: firstly, in the early stage of hydraulic device design, when the physical system of the whole device is incomplete, physical testing cannot be carried out; secondly, due to the large number of state parameters of the whole device, the combination test of various parameters requires a lot of test times

[0003] Although a large number of calculations and software simulation tests can be carried out in the design process, it is impossible to coordinate tests with the driver's operation and various control hardware during the process. Therefore, the test can only be carried out after the physical device is prepared. This process requires multiple physical reproductions and a large number of repeated tests, resulting in long development cycles and high testing costs

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