State constraint-based asynchronous motor finite time dynamic surface control method considering iron loss

Abstract

The invention belongs to the technical field of asynchronous motor position tracking control, and particularly discloses a state constraint-based asynchronous motor finite time dynamic surface control method considering an iron loss. According to the control method, a barrier Lyapunov function is constructed to ensure that the rotor angular speed, the stator current and other state variables of the asynchronous motor driving system are always in a given state interval; and a dynamic surface technology is introduced to overcome the problem of ''calculation explosion'' which cannot be avoided by a traditional backstepping method, a nonlinear term in a neural network approximation system is adopted, and the dynamic surface technology and finite time are combined to construct a controller. A simulation result shows that the control method not only can realize an ideal position tracking effect in finite time, but also can constrain state quantities such as the rotor angular velocity, the stator current and the like in a given constraint interval so that the safety problem caused by violation of state constraints is avoided.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of asynchronous motors, and in particular relates to a finite-time dynamic surface control method for an asynchronous motor based on state constraints considering iron loss. Background technique [0002] Asynchronous motor, also known as induction motor, is a type of motor in which the rotating magnetic field formed after the stator winding and the magnetic field of the induced current in the rotor winding physically interact to generate electromagnetic torque to drive the rotor to rotate. It is a type of motor This kind of AC motor, whose power ranges from a few watts to tens of thousands of kilowatts, is the most widely used motor in all walks of life and people's daily life in our country, providing power for various mechanical equipment and household appliances. For example, machine tools, fans, water pumps, metallurgy, light industrial machinery, small and medium-sized steel...

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Problems solved by technology

[0006]The purpose of the present invention is to propose a finite-time dynamic surface control method for asynchronous motors considering iron loss. In the case of considering iron loss and state constraints, the control method By using the dynamic surface technology to solve the "computational explosion" problem of the traditional backstepping method, combined with the finite time technology, the efficient tracking control of the position of the asynchronous motor is realized

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