Control method for protecting electric steering gear in sustained overload

Abstract

The invention relates to a control method for protecting electric steering gear in sustained overload. The control method comprises the following steps: S1, the electric steering gear takes a c-position ring correction loop as a control system, takes an angular displacement output quantity of the electric steering gear as a position feedback signal, and drives a motor of the electric steering gear to rotate according to a PWM signal output after the control solution; S2, a current sensor is added in the control system of the electric steering gear to acquire a current signal of the electric steering gear; S3, when the sampled current signal is greater than a current reference value of the electric steering gear component, the power output of the electric steering gear is turned off; and S4, a gear instruction and the deviation information are combined, when the sampled current signal is greater than the load current reference value and the gear feedback is greater than the gear feedback reference value, the power output of the electric steering gear is turned off. By using the control method disclosed by the invention, the security of the steering gear can be effectively improved to realize the protection function of the steering gear under the sustained large load, thereby preventing the steering gear from losing efficiency under the sustained large load and preventing the component from damaging under the large current condition.

Description

technical field [0001] The invention relates to a control method for an electric steering gear, in particular to a control method for an electric steering gear with a protection function in the case of continuous overload, and belongs to the electric steering gear control technology. Background technique [0002] With the vigorous development of aerospace technology and the development of various advanced weapons, the requirements for the overall performance of the steering gear are getting higher and higher, so the steering gear is constantly reduced in volume and quality, the carrying capacity is continuously increased, and the control performance is continuously improved. direction of development. The electric steering gear is composed of a brushless DC motor, a worm gear transmission mechanism, a potentiometer, and a numerical control; it has attracted widespread attention due to its simplicity, reliability, good craftsmanship, convenient use and maintenance, single ener...

AI Technical Summary

Problems solved by technology

Due to cost and volume limitations, the load capacity of the electric steering gear is limited accordingly

During the working process of the steering gear, there may be a long-term heavy load working condition. At this time, if the long-term high-power output, the long-term high current may cause damage to the motor and components, resulting in the failure of the electric steering gear

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