Active control drive power supply for shape memory alloy

Abstract

The invention provides an active control drive power supply for a shape memory alloy. The drive power supply uses a closed loop control system consisting of a current stabilized regulating controller, a gate turn-off thyristor and a current sensor; the current which is output to the shape memory alloy is controlled via continuously sampling weak voltage signals which are output by a digital-modulus converting card at a computer end so that the voltage signals at the computer end are in one-to-one correspondence with the output current intensity. Each case of the drive power supply is provided with three passages which can simultaneously and independently drive three shape memory alloy wires; in order to enable the power supply to adapt to an inductive load, each passage is provided with a capacitance and resistance absorbing module to prevent the gate turn-off thyristor from being punctured by the high voltage generated by the inductive load. The shape memory alloy active control drive power supply is simple in structure, convenient and fast in use, high in drive power, convenient in operation and wide in regulating range.

Description

technical field [0001] The invention relates to a driving power supply, in particular to a shape memory alloy active control driving power supply for active control of the vibration of solar sail panels. Background technique [0002] The vibration of the solar panel has a great influence on the life of the panel itself and the attitude control of the star. There are mainly two methods of controlling the vibration of solar panels: passive control and active control. In the past, the drive mechanism used for active control of the sail was a piezoelectric sheet. With the development of applications, it was found that the piezoelectric sheet is useful as a drive mechanism. Many disadvantages, the reasons are as follows: (1) Since the driving force of the piezoelectric sheet is small, it is difficult to reduce the vibration of the sailboard to the required value in a short time; (2) Since the piezoelectric sheet needs to be installed The adhesive is used to fix the piezoelectric...

AI Technical Summary

Problems solved by technology

There are mainly two methods of controlling the vibration of solar panels: passive control and active control. In the past, the drive mechanism used for active control of the sail was a piezoelectric sheet. With the development of applications, it was found that the piezoelectric sheet is useful as a drive mechanism. Many disadvantages, the reasons are as follows: (1) Since the driving force of the piezoelectric sheet is small, it is difficult to reduce the vibration of the sailboard to the required value in a short time; (2) Since the piezoelectric sheet needs to be installed Use adhesive to fix the piezoelectric sheet on the surface of the sailboard. The adhesive has a great influence on the control effect, and the thickness of the adhesive is difficult to control, resulting in a strong dispersion of the control effect

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