用高级语言实现步进马达的编程控制

本文对步马达微机控制系统的结构，控制原理，软件流程图等作了简单的分析，在此基础上，介绍了在“引线框架自动粘胶机”中有关步进马达控制的运动方式，数据结构等。     

云台变焦摄像机技术探析

从过去应用上来看，大多数PTZ摄像机使用步进电动马达或液压马达来执行这些动作功能。但到现阶段液压马达已不再被采用，目前经常可以看到PTZ摄像机云台变焦设备都采行电动步进马达较多。这些现代化的工业摄像机可以完全静止也可以依照控制信号指令进行移动，     

大范围纳米驱动定位压电马达的研究

提出一种基于尺蠖运动(Inchwormmotion)原理的大范围纳米级驱动压电马达,并着重阐述了压电马达的机械结构设计和控制系统的驱动电源等方面的内容。     

电磁型微马达及其控制方式应用研究

对Фmm和Ф2mm电磁型微马达的原理、结构进行了详细介绍。利用微马达可以作为同步电机使用的特性实现微马达的快速运转,同时利用其步进特性实现单步进给。为了实现微马达在精密MEMS系统中的应用,采用了一种简单、实用的方式来实现微马达的步距细分。该马达良好的性能和完善的控制方式提高了其实用能力。     

凌华科技推出二轴运动控制卡PCI-8102

2006年5月25日，凌华科技推出进阶的二轴运动控制卡PCI-8102。提供二轴脉冲输出，脉冲信号输出频率可高达6．55MHz，以控制伺服马达、步进马达及线性马达。其功能包括硬件圆弧补间，使用软件保护功能与卡号设定等。     

新品

HSL-4XMO系列远程运动控制模块可提供四轴脉冲输出,控制伺服马达、步进马达及线性马达,具有远程控制、省配线以及单一系统多轴控制等特点; 每一个High Speed Link(HSL)控制网络都可连接15 个HSL-4XMO,控制60个运动轴,通过一     

751型分光光度计联机自动化——狭缝调节法

751型分光光度计采用手动方式完成波长扫描,操作繁锁,本文介绍将分光光度计和Supper XT-Ⅲ型微机联接,用两个步进马达控制波长、狭缝同步扫描,提高测量灵敏度。微机通过打印机接口地址,控制两个步进马达的驱动电流,使波长和狭缝同步扫描。首先在未置样品的情况下,测量控制波长的步进马达每步进一步,所对应的狭缝步进马达     

基于A3967SLB的步进马达寿命测试仪的设计

介绍一种基于89C51单片机的步进马达寿命测试仪的设计。它采用8254可编程定时器／计数器来实现1Hz-2kHz步进式脉冲输出．并使用A3967SLB二相步进电机驱动器驱动。具有低成本、高分辨率、反应速度快、性能稳定和硬件结构简单等优点。     

双全桥微步距PWM马达驱动器A3972芯片及应用

主要介绍双全桥微步距PWM马达驱动器A3972芯片及其应用，阐述了该芯片的内部结构、工作特点，并给出了由A3972组成的步进电机驱动电路及与单片机的接口，以及该芯片的控制方法     

开环控制系统自动升降速方式的改进和步进电机的驱动

<正> 一、开环控制系统自动升降速方式的改进1.自动升降速问题的提出在开环控制系统中,由于不设置闭环控制系统的一套位置测量元件和误差校正系统,而是用步进电机和电液脉冲马达直接驱动机床运动,所以,控制精度在很大程度上依赖于步进电机动作的准确性、可靠性。故对步进电机的准确性,可靠性及速度都有较高的要求。(开环控制系统和闭环控制系统的结构框图如图     

超声电机速度的模糊跟踪控制

与传统的电磁感应电机不同,超声电机是利用压电陶瓷的逆压电效应激发超声振动,然后通过定子和转子之间的摩擦作用把电能转化为机械能的一种新型电机.针对超声电机的非线性、难以建立精确数学模型等特性,以目前得到广泛应用的一类超声电机为研究对象,利用模糊T-S模型建立了超声电机的模型,基于此模型,结合模糊状态反馈控制和H<,∞>控...     

光栅回转式压电微角度执行器的研究

介绍了一种基于圆光栅检测的回转式压电微角度执行器,采用尺蠖运动原理设计回转式压电电动机,运用C8051F005单片机产生四路控制信号,并采用直流放大式驱动电源放大控制信号驱动压电电动机,并通过圆光栅检测系统实时测量电动机联动盘回转角度,把测量值引入控制环节,实现最小步距为2.26"的全圆周匀速连续转动。     

Block diagrams of a multilayer piezoelectric motor for nano- and microdisplacements based on the longitudinal piezoelectric effect

Block diagrams of a multilayer piezoelectric motor based on the longitudinal piezoelectric effect with account for the electromotive counterforce are designed. Transfer functions of the piezoelectric motor with regard to its geometric and physical parameters, electromotive counterforce, and external load are obtained.     

A novel tiny ultrasonic linear motor using the radial mode of a bimorph

The new-typed tiny ultrasonic motor has been introduced to have compact and simple structure. The linear motion of a new-type linear motor is operated by a principle of inertia displacement. The motor can be realized by the central movement of transducing part, which is the maximum displacement of the up-and-down movement. The transducing parts, using different diameters, 3.0 and 5.0 mm and thickness of 0.1 and 0.2 mm metal disks, were fabricated and the dynamic characteristics of the motors were measured. The motor with piezoelectric ceramic of Ø3 needs higher operating voltage than the motor with the piezoelectric ceramic of Ø5.     

A new flextensional piezoelectric ultrasonic motor—Design,fabrication and characterisation

This paper presents the techniques used for the characterisation of a new type of standing-wave piezoelectric ultrasonic motor. The motor uses a metallic flextensional amplifier, or “cymbal”, to convert the radial mode vibrations of a piezoelectric ceramic disc into flexural oscillations, which are further converted to produce rotary actuation by means of an elastic fin friction drive. The motor operates on a single-phase electrical supply. A beryllium copper rotor design with three-fin configuration was adopted. The best stall torque, no load speed, transient time and efficiency for a 25 mm motor were 2 N mm, 680 rpm, 2 ms and 4.8%, respectively. The operational characteristics of the motor were evaluated by using two methods: one based on the pulley–brake principle and one on high-speed imaging. The results obtained from using these two techniques are contrasted and compared.     

Effect of shearing deformation on the transient response of a traveling wave ultrasonic motor

Some works take into account the shearing deformation of frictional material, but its effect on the transient response has not yet been considered. In this paper, optimal deformation angle and resonance frequency of frictional material are investigated. Force expressions in the stator/rotor interface are developed. Mechanical characteristics taking into account the effect of shearing deformation are deduced and presented. It is shown that the shearing deformation affects the initial state as well as on the steady state. Also, the fast time response of the motor is deduced. Results of the simulation are validated using the measurements made by other researchers on traveling wave piezoelectric motor AWM90-X, Daimler-Benz type, and a prototype USM(AWM-90).     

The transfer function of a new disc-type ultrasonic motor

This paper deals with the transfer functions of a new disc-type ultrasonic motor: stator and stator–rotor energy transformation. The objective is to initiate a mode that can produce certain relative dynamic responses in the proposed motor. The performance will be parameterized by system inputs in an attempt to obtain an optimal operational configuration. The transfer function model of the piezoelectric ultrasonic stator based on the lateral elliptical motion is derived for the control application and certification of its load-characteristic parameters and also predicts the motor performance. On this basis, we can determine whether the output of the motor will be stable. The contact-dynamics behaviors of the stator are also studied. These derived formulations in this paper are based on the general concept of the constitutive laws governing piezoelectric materials which permit the introduction of kinetic energy, electrical energy, and geometric constraints relating to the deformation variables.     

Intelligent motion control for linear piezoelectric ceramic motor drive

Since the dynamic characteristics of a linear piezoelectric ceramic motor (LPCM) are highly nonlinear and time varying, it is difficult to design a suitable motor drive and position controller that realizes accurate position control at all time. This study investigates a double-inductance double-capacitance (LLCC) resonant driving circuit and a sliding-mode fuzzy-neural-network control (SMFNNC) system for the motion control of an LPCM. First, the motor structure and LLCC driving circuit of an LPCM are introduced. The LLCC resonant inverter is designed to operate at an optimal switching frequency such that the output voltage will not be influenced by the variation of quality factor. Moreover, a SMFNNC system is designed to achieve favorable tracking performance without precise dynamic models being controlled. All adaptive learning algorithms in the SMFNNC system are derived in the sense of Lyapunov stability analysis, so that system-tracking stability can be guaranteed in the closed-loop system. The effectiveness of the proposed driving circuit and control system is verified by experimental results.     

Design and simulation of an ultrasonic linear motor with dual piezoelectric actuators

In this study, an ultrasonic linear motor with dual piezoelectric (PZT) actuators is developed. A traveling wave motion is generated on the stator by a double-sided excitation of the stator of the ultrasonic linear motor, which drives the slider that is connected to the stator. The development and design processes are described. In this paper, the principle of using an ultrasonic motor to drive a traveling wave type is presented. The structure for the ultrasonic linear motor is then demonstrated with its dimensions, driving conditions and material parameters, so that Computer-Aided Engineering (CAE) can be used to simulate the driving performance. The simulation results show the differences to the characteristics that are achieved by adjusting the critical parameters, such as the PZT boned positions, the excitation frequency and the preload, in order to derive the best design. A prototype that uses the best parameter design is presented, and a method to improve development processes is presented in the final section.

     

Deflection performance of a bi-directional distributed polymericpiezoelectric micromotor

Distributed piezoelectric micromotor architectures have great potential because they combine the advantages of piezoelectric micromotors with the advantages of distributed architectures. However, to use a distributed architecture paradigm for piezoelectric micromotors, a basic motor building block is needed. To meet this need a piezoelectric micromotor building block, called a C-block, was developed. These C-blocks can be combined together in a variety of distributed architectures to expand their capabilities. This paper introduces a basic polymeric piezoelectric C-block micromotor design and a serial C-block micromotor architecture that demonstrates increased deflection capabilities. For both micromotor designs, simple manufacturing steps are described and analytical deflection models are presented. These micromotors were experimentally tested with prototypes ranging in size from a few millimeters to a few centimeters in scale. Results for an individual C-block micromotor and a serial C-block micromotor are presented. These results demonstrate the accuracy of the models and the feasibility of designing and fabricating polymeric piezoelectric micromotor architectures