Dual-mode controller of electrical-mechanical converter

Abstract

The present invention discloses a dual-mode controller of an electrical-mechanical converter. The dual-mode controller of the electrical-mechanical converter comprises a control chip, a digital analog converter (DAC), a hysteresis comparison PWM modulator, a current signal conditioning circuit, a difference orthogonal signal conditioning circuit, a signal switching switch, an H-bridge driving module, a protection circuit, the electrical-mechanical converter, a temperature sensor, a current sensor and a digital grating scale. An input signal and a feedback signal are processed by the signal conditioning circuits and then are sent to the control chip, the control chip determines and operates to obtain a control signal, and the control signal is sent to an H-bridge driver to drive the electrical-mechanical converter to reach an expected control objective, wherein the control chip switches between a PID closed-loop control mode and a time optimal Bang-Bang control mode according to an error signal, thereby achieving the control objective of being high in response characteristic and not losing the precision.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a dual-mode controller satisfying the high-response control performance of a moving-coil electro-mechanical converter. Background technique [0002] The electric-mechanical converter (miniature linear motor) is the key component of the electro-hydraulic proportional control element. It can convert the electrical signal (current or voltage) input from the outside into a mechanical quantity (force or displacement) in a continuous and proportional manner. Characteristics directly affect the key characteristics of hydraulic actuators. The moving coil electro-mechanical converter has attracted widespread attention for its high linearity, small hysteresis and good response characteristics. The inertia of the moving parts is large, which leads to insufficient continuous control characteristics of electrical signals, poor linearity, low precision, one-way output, slow response, an...

AI Technical Summary

Problems solved by technology

The moving coil electro-mechanical converter has attracted widespread attention for its high linearity, small hysteresis and good response characteristics. The inertia of the moving parts is large, resulting in insufficient continuous control characteristics of electrical signals, poor linearity, low precision, one-way output, slow response, and low sensitivity. It is mostly used in low-frequency and low-precision control occasions

[0003] Traditionally, PID controllers are widely used to control them. However, PID controllers are limited by contradictions such as response speed, overshoot, and noise interference, making it difficult to maximize their performance.

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