单片机步进电机控制系统外文文献翻译--简单紧凑的大步长线性压电步进电机

单片机步进电机控制系统外文文献翻译--简单紧凑的大步长线性压电步进电机内容摘要：

g force. In this paper, we demonstrate a piezoelectric motor that does not have the above limitations. It is implemented by a single piezoelectric scanner tube(PST) that is axially and deeply cut into almost two halves and grips a hollow shaft (HS)inside from both ends by the spring parts of the driving voltages that separately deform the two halves of the PST in one direction and concurrently recover will move the HS one step in the opposite direction, and vice versa. Its pactness, simplicity, rigidity, and large step size make it particularly useful in small space(extreme conditions)and low temperature applications. II. DESIGN AND PRINCIPLE Figure 1 shows the schematic of our design. A photo of the actual setup is given in Fig. 2. Two sapphire rings of thick by and mm inner versus outer diameters are glued(with H74F epoxy from Epoxy Technology)onto the ends of a fourquadrant PST(model of Physik Instrumente, 30 mm long by 10 mm outer diameter by wall thickness with 177。 200 V maximum operating voltages), respectively. A cut(with diamond saw)through two opposite boundaries of the quadrants is made from the sapphire ring at one end of the PST into about 92% of the tube length toward the other end. The uncut sapphire ring is the base ring, whereas the other is cut into two semi rings which are called clamping semi rings(will clamp hold a mobile HS).Each pair of the neighboring electrodes with no cut in between is wired together, resulting in two semicylindrical electrodes, one is arbitrarily called the first electrode (E1)for convenience and the other, the second electrode(E2).The two halves of the PST that E1 and E2 control are abbreviated as P1 and P2, respectively. The moving part of the motor is a titanium HS that is inserted into the PST as shown in (a).We have studied a circular and a square HS as illustrated in (b). For the circular one(length=45mm,inner diameter=, and outer diameter= mm which can pass through the sapphire rings at the PST ends with a small gap of mm),a wire cut through the axis is made from each end toward the other end with the cutting planes perpendicular to each two cuts do not go through the entire HS and a small length of mm remains uncut at each end. The pair of the HS cut slits having the opening toward the same direction as that of the PST slits is arranged in the same plane with the PST slits. A stronger pression spring is secured in the HS at one end, pushing the HS to open wider and press against the clamping semi rings with forces N1 and N2,respectively,whereas a weaker pression spring in the HS at the other end presses the HS on the base ring with a total pressing force three pressing forces N1,N2,and Nbr are set roughly equal by the above stronger and weaker pression springs. Accordingly, the maximum static friction forces on the HS due to these three pressing forces are approximately equal in value(directions may be opposite as discussed below)if equal friction coefficients are assumed. .(a)The structure of our piezomotor。 (b)two kinds of hollow shafts studied. One big advantage of this mutual clamping between the PST and HS at both ends is that this structure is very firm(resistant to vibration noise)and can be installed in any direction. Also note that the clamping is elastic(long range forces),implying that large temperature variations will not change the clamping forces significantly and the three maximum static frictions remains equal in value. To operate the motor, two driving voltages D1 and D2 of (a)type are applied to the electrodes E1 and E2 of the PST, respectively(the inner electrode voltage is fixed at 200 V), which will deform the corresponding semitubular actuators P1 and P2 as follows. P1 and P2 are initialized to expa。