Modeling method and device of closed-loop control system
A closed-loop control and control model technology, applied in the field of control, can solve the problems that cannot be applied in engineering practice, ignore modeling errors and interference, and cannot be engineered, and achieve simple form, improved robustness, and fewer parameters to adjust Effect
Active Publication Date: 2017-04-26
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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However, this method is partial to theory, especially one of the parameters is the observable unknown matrix of Lomborg, which cannot be engineered, and cannot be used in practical engineering applications, and ignores modeling errors and disturbances, and is robust to the control system have a greater impact
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] The terms "comprising" and "having" and any variations thereof in the description and claims of the present invention are intended to cover a non-exclusive inclusion, for example, a process comprising a series of steps or a device of structure need not be limited to the expressly listed Instead, those structures or steps may include other steps or structures not expressly listed or inherent to the process or device.
[0029] In engineering applications,...
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An embodiment of the invention provides a modeling method and device of a closed-loop control system. The modeling method includes: establishing a state space expression form of the closed-loop control system, wherein the state space expression form includes an interference item which is used for expressing influence jointly caused by modeling errors and unknown interference on the system; determining an uncertain gain matrix of the state space expression form according to a mapping relationship between uncertain gain matrixes and a preset threshold value; determining a feedback gain matrix of the state space expression form according to stabilizing conditions of the system which is passive; building a system model of the closed-loop control system according to the uncertain gain matrix, the feedback gain matrix and the state space expression form. By taking passivity of the closed-loop control system into consideration, robustness of the closed-loop control system is improved.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of control, and in particular to a modeling method and device for a closed-loop control system. Background technique [0002] Pitch power regulation method is one of the common methods of wind turbine power regulation. When the wind changes, the wind generator uses the blade pitch adjustment controller to change the blade pitch angle, maintain a constant speed, and adjust the output power of the wind generator to achieve the desired goal. The more commonly used control method is PID control. PID control is a modeless control method whose robustness cannot be determined and verified. [0003] Aiming at the defects of the PID control method, an existing solution is: use the fuzzy T-S model to approximate the continuous time nonlinear model of the wind turbine pitch control system, and according to the obtained fuzzy T-S model, use single-point fuzzification, The dynamic fuzzy model...
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Login to View More IPC IPC(8): G05F1/66
CPCG05F1/66
Inventor 王峰吴先友
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD