Active disturbance rejection control method for low temperature wind tunnel flow field
A technology of active disturbance rejection control and active disturbance rejection controller, which is applied in the field of wind tunnel flow field control and continuous low temperature wind tunnel flow field control, which can solve the problems of a large number of trainings and increase the cost and cycle of wind tunnel debugging.
Active Publication Date: 2021-05-04
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology
The ETW wind tunnel in Europe uses a control algorithm with self-learning ability. The disadvantage of this type of intelligent control method is that it requires a large amount of sample data to train the algorithm, and the acquisition of sample data increases the cost and cycle of wind tunnel debugging.
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[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodime...
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The invention discloses a low-temperature wind tunnel flow field active disturbance rejection control method, including the establishment of a low-temperature wind tunnel flow field mathematical model and the design of an active disturbance rejection controller. Firstly, the low-temperature wind tunnel flow field adjustment mechanism and flow field parameters are established. The transfer function between them, regardless of the coupling relationship between the flow field adjustment mechanism and the flow field parameters, the ADRC controller controls the flow field parameters through the flow field adjustment mechanism, and the ADRC controller includes the expansion state observer and the state The error feedback controller, the expansion state observer regards the disturbance factors including the coupling between the adjustment mechanism and the flow field parameters as the total disturbance and estimates them, and compensates them in the state error feedback controller to realize the decoupling control of the flow field . The present invention does not require an accurate mathematical model of the flow field, and when the coupling relationship of the three control channels of total temperature, total pressure and Mach is unknown, the decoupling control of the three control channels can be realized, effectively improving the adjustment accuracy of the low temperature wind tunnel flow field , and shorten the flow field adjustment time.
Description
technical field [0001] The invention relates to the field of wind tunnel flow field control, in particular to the field of continuous low temperature wind tunnel flow field control. Background technique [0002] The Reynolds number is a similar criterion number that characterizes the influence of viscosity in fluid mechanics. The change of Reynolds number mainly affects the flow where viscosity plays a dominant role, such as boundary layer separation, vortex flow, shock wave / boundary layer interference, and shock wave / vortex interference. Insufficient simulation of the Reynolds number in the wind tunnel test will cause the above-mentioned flow phenomenon to change, which is different from the real flight. At present, the methods to achieve high Reynolds number in wind tunnel tests mainly include reducing the total temperature, increasing the total pressure, using heavy gas or increasing the size of the model, among which reducing the total temperature (ie low temperature win...
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IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 刘为杰何帆秦建华朱文杰詹健
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT