The rotary actuator includes a support structure and a linear actuator supported by the support structure. Wherein the linear actuator comprises: a first member; a second member that moves in a linear direction with respect to the first member when a driving signal is applied to the linear actuator; Rotary Actuators and a bearing Wherein the bearing arrangement supports the first member and the second member within the support structure and enables the first member and the second member to be independently movable relative to the support structure. Rotary Actuators The rotational drive further includes a linear to rotary converter, the second member of the linear actuator being coupled to the linear to rotary converter. The linear to rotary converter includes an output member having a rotation axis. During operation, the linearly to rotary converter converts the linear reciprocating motion of the second member of the linear actuator into rotational movement of the output member about the axis of rotation.
Rotary drive is a kind of miniature precision drive device, which has the advantages of high positioning accuracy, fast response, compact structure and high output power per unit weight. Rotary Actuators It is widely used in fiber docking, biomedicine, precision manufacturing and medical operation. The inertial piezoelectric actuator has the advantages of simple structure and unique driving mode, Rotary Actuators but its driving signal often adopts asymmetrical sawtooth wave, and the circuit is complicated.
Rotary drive, driven by symmetrical signals. This kind of magnetic - piezoelectric rotary drive has not been studied at home and abroad. The research of this paper provides a new idea for the progress of piezoelectric actuator. The main contents of this paper are as follows: 1. Current situation and application of piezoelectric actuators The domestic and international research status and application fields of piezoelectric actuators are analyzed. Rotary Actuators For the direct-acting, stepped and inertial piezoelectric actuators Based on the characteristics of the inertial piezoelectric actuator, the magnetic actuator is proposed, which is driven by a symmetrical signal which is easy to obtain. The power generation circuit is simplified and the piezoelectric chip is used as the driving element. Rotary Actuators To achieve drive directional movement. 2. Piezoelectric drive basic theory and magnetic material research Magnetic-piezoelectric interaction Rotary drive of the main drive part of the magnetic under the piezoelectric oscillator, combined with the reverse piezoelectric effect and magnetic interaction, Rotary Actuators magnetic and piezoelectric coupling can make The motion performance of the drive is changed. According to the theoretical information of piezoelectric drive piezoelectric oscillator with LE vibration mode selection of PZT piezoelectric ceramic as the driving element, Rotary Actuators the use of cantilever way to hold. The NdFeB permanent magnets and the 45 gauge steel mass were selected by the analysis of the magnetic material to generate the magnetic effect and to derive the magnetic force between them. The driving arm of the rotary drive driven by the magneto-piezoelectric effect is analyzed and the principle of the motion output can be generated under the symmetrical excitation of the drive arm with poor clamping. The simulation software is used to simulate the driving arm, and the structure of the driving arm is designed And the experimental analysis provides the basis for the use of ansys on the drive arm structural parameters of the simulation analysis to obtain the patch distance and effective substrate length on the free free end displacement and the first-order natural frequency of the law; Rotary Actuators by Simulink drive arm in the sine and square wave excitation And the magnetic force between the mass block and the permanent magnet is equivalent to the nonlinear spring force. Then the simulation is carried out by using ansys to obtain the movement law of the driving arm under the magnetic action. A suitable clamping difference is obtained for static and dynamic testing of the drive arms under different clamping differences and the response of the lower drive arms to sine and square wave excitation is tested. Rotary Actuators The motion performance of the single and double magnetic driving arm is tested respectively, and the influence of the voltage, frequency and magnetic distance on the amplitude difference is obtained. 4. The principle of motion and the design of the rotary drive for the magneto-piezoelectric interaction The design principle of the unilateral and bilateral magnetic actuator under the excitation of the square wave is analyzed, and the inertial force change from the reciprocating vibration of the driving arm is analyzed. The formation of the rotation of the drive. The core components of the different clamping sleeve and the magnetic stent drive are designed. The principle of selecting the quality of the main structure is analyzed. The suitable base bearing is selected, and the prototype of the single and side magnetic working rotary drive is made. 5. Experimental study of magneto-piezoelectric rotary actuator Aiming at the non-magnetic, unilateral magnetic and bilateral magnetic interaction, three kinds of piezoelectric rotary actuators were used to construct the whole motion performance test system. The three kinds of drives were tested under the excitation of sinusoidal and square wave The main performance parameters are speed and average step distance. The influencing factors are the voltage, Rotary Actuators frequency and type of the driving signal. According to the test results, the influence of these factors on the motion performance is analyzed. Three kinds of piezoelectric actuators are obtained in their respective operating frequency bands Of the peak speed. The variation law of three kinds of piezoelectric actuators and the average step distance with frequency is analyzed, and the variation rule of three kinds of piezoelectric actuators and the average step distance with voltage is analyzed. The test results for the speed rise of the drive for the magneto-piezoelectric actuator are analyzed from both the starting current and the work done.