Method for constructing neutral network generalized inverse adaptive controller of three-motor driving system

Abstract

The invention discloses a method for constructing a neutral network generalized inverse adaptive controller of a three-motor driving system. Three frequency converters respectively drive three induction motors to drive a load to form the three-motor driving system, the rotating speed setting values of the three frequency converters are set by S7-300 PLC (Programmable Logic Controller), the neutral network generalized inverse of the three-motor driving system is constructed by using a static neutral network, two integrators and three transfer functions, and the neutral network generalized inverse is connected in front of the three-motor driving system to form a pseudo linear compound system. Corresponding fuzzy adaptive controllers are respectively designed for one speed subsystem and two tension subsystems to form a fuzzy adaptive closed-loop controller, and the fuzzy adaptive closed-loop controller and the neutral network generalized inverse are connected in series to form the neutral network generalized inverse adaptive controller. Control parameters can be adjusted online according to system errors, the starting time and the overshoot of the system can be greatly reduced, and the tracking accuracy and the tracking speed of the system are obviously increased.

Description

technical field [0001] The invention relates to a construction method of a neural network generalized inverse adaptive controller for a three-motor drive system, which is suitable for high-performance synchronous coordinated decoupling control of three inverters driving three induction motors to drive loads, and belongs to electric drive control equipment technology field. Background technique [0002] In recent years, a multi-motor drive system composed of multiple inverters driving multiple induction motors and driving loads has been widely used in electric vehicle drives, urban rail transit, printing and other industrial fields. The research on the control technology of multi-motor drive system has developed rapidly, and the high-precision, durable and efficient multi-motor synchronous coordinated control performance has become the focus of research. For the three-motor drive system, it has the characteristics of multiple inputs, multiple outputs, nonlinearity, and stron...

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Problems solved by technology

However, the driving system composed of three or more motors is widely used in industrial applications, involving many parameters and coupling variables and complex equipment. Therefore, the existing control strategy has obvious limitations, and its closed-loop Most of the controllers use ordinary linear PID controllers. This kind of controller is simple in structure, low in cost, easy to implement, and can meet the general speed regulation requirements. However, because its control parameters remain constant, the dynamic performance of the system is not good, especially The starting speed is relatively slow and the overshoot is relatively large. When encountering a sudden increase in load or a sudden change in the given speed, the system response often takes a long time to return to the steady state

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