Method for tuning control parameter in walk-aiding functional electric stimulation system by utilizing genetic algorithm

Abstract

The invention relates to a parameter control method in a system for stimulating physical movement muscle groups and peripheral nerves thereof by means of a current pulse sequence, in particular to a parameter control method in a walk-aiding functional electric stimulation system. In order to accurately, stably and real-timely control the current intensity of the FES system and effectively increasing the accuracy and stability of the FES system, the invention adopts the following technical scheme: the parameter control method in the walk-aiding functional electric stimulation system includes the following steps that: firstly, forces is applied on a walker to cause the change of a HRV parameter, and then a fuzzy controller is utilized to control starting; secondly, a genetic algorithm is utilized to tune a PID parameter, the current intensity of the walk-aiding functional electric stimulation system is real-timely regulated, the walk-aiding functional electric stimulation system is shutdown in the end according to the change of the HRV, and PID refers to proportion unit P, integration unit I and differential unit D. The invention is mainly used by walk-aiding functional electric stimulation systems in rehabilitation.

Description

technical field [0001] The invention relates to a parameter control method in a device for stimulating limb motor muscles and peripheral nerves with current pulse sequences. Specifically, the invention relates to the fuzzy control of the open and close working state of the FES system based on the HRV parameters of the walker, and relates to a method for setting the PID control parameters by genetic algorithm in the walking aid functional electrical stimulation system. technical background [0002] Functional Electrical Stimulation (FES) is a technology that stimulates limb motor muscles and peripheral nerves through current pulse sequences to effectively restore or reconstruct part of the motor function of paraplegic patients. At present, due to the weak regeneration ability of the spinal cord, there is no effective treatment method that can directly repair the injury for paralyzed patients with spinal cord injury. The implementation of functional rehabilitation training is ...

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Problems solved by technology

According to statistics, there is still little research on the trigger control of FES at present, and according to the deviation between the action effect and the predetermined action, the closed-loop control is used to automatically adjust the FES stimulation intensity and timing parameters, thereby greatly improving the real-time performance, accuracy and stability of the FES system. , but effective control methods are still being explored

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