Spike current suppression method and device for steering gear servo system

Abstract

The peak current suppression method of the steering gear servo system provided by the present invention is to add a motor acceleration limiter in the speed loop of the electric steering gear servo system controller, and the input signal e of the electric steering gear speed loop v (k) and the input signal e at the previous moment v (k-1) is used as the input of the motor acceleration limiter, and its output is the processed speed loop input signal e v '(k). Adjusting the motor acceleration limiter according to the performance of the motor itself and the performance requirements of the electric steering gear system can solve the problem of saturation of the controller output of the electric steering gear, and at the same time, it can suppress the instantaneous high current of the steering gear caused by the violent fluctuation of the output of the controller Phenomenon, there is no need to increase the current acquisition circuit and isolation circuit, and the suppression of the peak current of the electric steering gear can be completed through simple software design. It has low cost, high reliability, no increase in hardware volume, and good versatility. The invention also provides a spike current suppressing device for the steering gear servo system.

Description

Technical field [0001] The invention relates to the field of motor control, in particular to a method and device for suppressing peak current of a servo system of a steering gear. Background technique [0002] The steering gear is a position (angle) servo driver, which is suitable for those control systems that require constant angle changes and can be maintained. At present, it has been widely used in high-end remote control toys, such as airplanes, submarine models, remote control robots, unmanned aerial vehicles, missiles and industries. [0003] The steering gear is mainly composed of a housing, a circuit board, a drive motor, a reducer and a position detection element. The working principle is that the receiver sends a signal to the steering gear, and the coreless motor is driven by the IC on the circuit board to start rotating. The power is transmitted to the swing arm through the reduction gear, and the position detector sends back a signal to determine whether it has reach...

AI Technical Summary

Problems solved by technology

The reliability of the electric steering gear system has an important impact on the safety of the aircraft, and the peak current that occurs when the electric steering gear executes the step command causes a huge safety hazard to the electric steering gear and the aircraft

At present, the design of hardware circuit is mostly used to design the current loop to realize the input protection of the current. In order to ensure the performance of the main processor during the design, the current acquisition circuit needs to be isolated, which increases the cost and volume of the system to a certain extent. the complexity of

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