基于DRV8432的直流力矩电机驱动器的设计

针对直流力矩电机驱动器的设计,详细介绍了基于DRV8432的直流力矩电机驱动器设计过程,提出了对开发过程中所出现问题的改进办法。实验验证表明,DRV8432十分适合小功率直流力矩电机驱动。     

多轴运动控制器(PMAC)在直流力矩电机伺服控制中的应用

介绍了PMAC(Programmable Multi-Axis Controller)的特性及其控制直流力矩电机的具体方法,描述了以PMAC卡为控制核心的直流力矩电机伺服控制系统,实现了力矩电机的PWM脉宽调制控制及力矩电机的高精度位置控制和较高的响应速度,应用到转台控制系统中并得到验证。     

机载SAR稳定平台直流力矩电机驱动器

介绍了稳定平台直流力矩电机驱动器的系统组成,包括单片机、R/D变换器、脉冲宽度调制(PWM)功放电路、A/D和D/A电路、通信接口电路。详细阐述了直流力矩电机驱动器需要解决的关键技术问题。最后,给出了稳定精度试验结果。     

电机驱动器装配工艺技术

阐述了直流力矩电器驱动器的基本工作原理;给出了直流力矩电器驱动器的装配工艺流程,并对工艺流程中的重要环节做了较为详细的说明;总结了直流力矩电机驱动器的抗干扰措施及安装注意事项。     

直流脉宽调速系统

本文着重阐述了直流脉宽调速系统对直流力矩电机的控制。详细分析了ＰＩＤ调节器、三角波发生器、宽调制器、延时光耦隔离电路、功率变换器在控制线路中的作用。     

基于PCC控制器的精密伺服控制系统

本文介绍了一种精密伺服控制系统的组成,包括PCC控制器、直流伺服驱动器、直流力矩电机、旋转变压器等,并介绍了控制系统的工作原理和工作方法,最后给出了跟踪精度的测试结果。     

雷达伺服系统建模与仿真

针对某型雷达伺服系统所采用的直流力矩电机模型,利用 MATLAB 进行了电流环、 基于液浮速率积分陀螺的速度环以及位置环仿真设计。最后利用跟踪模拟航路验证了仿真设计的有效性。     

直接驱动系统的频率特性研究

用经典的频率法来解决单输入单输出系统的综合还是有效的。但是必须测定该系统的固有频率特性,以作为综合的基础。直接驱动系统是以直流力矩电机作执行元件,把力矩电机直接套在负载轴上的一种装置,它具有反应速度快,线性度好,耦合刚度高、分辨率高、结构紧凑,噪音低的特点。所     

信号检测、噪声分析、信号干扰、均衡与补偿

0617429滤光限定带宽10Gbit/s RZ信号的基于SPM全光学形变=SPM-based all-optical reshaspingfor10Gbit/s RZsignals bandli mited by optical filtering〔刊,英〕/N.Yoshikane,I.Morita//Electronics Letters.—2002,38(24).—1570(E)0617430电动负载模拟器多余力矩产生机理及抑制〔刊,中〕/李成功//北京航空航天大学学报.—2006,32(2).—204-208(L)介绍了直流力矩电机驱动的电动负载模拟器的机械结构和工作原理,建立了电动负载模拟器执行机构的数学模型并用方框图形示。分析了直流力矩电机的机械特性并指出其正常工作的范围。分析…     

机线张力数控系统卷绕驱动设计

简述了力矩电机的原理,分析机线张力数控系统卷绕驱动机构的工艺要求,针对普通伺服电机驱动收线轮装置存在的缺陷,提出了用力矩电机控制收线轮的方案。在卷绕驱动机构设计参数确定过程中,阐述了切割线张力形成的原理,并且依据控制电机的选择原则,给出了力矩电机选择计算方法,最终完成了力矩电机控制方式的设计,实现了多线切割恒张力、恒限速度的要求。采用力矩电机驱动收线轮能够使卷绕机构满足系统要求,简化卷绕装置的结构,并能使切割过程运行平稳。     

Interior Permanent Magnet Motors With Reduced Torque Pulsation

In this paper, three-phase interior permanent magnet brushless DC motors are analyzed. The effect of magnetization direction, number of stator slots, winding distribution, skew angle, current waveform, and advance angle on torque pulsation is examined. Finite element method is used to calculate the torque, reluctance torque, back iron flux density, tooth flux density, detent torque, and back electromotive force of the motors. Switching instants are calculated such that the reluctance torque can be utilized and maximum torque with reduced pulsation is achieved. Experimental results to support the simulation findings are included in this paper.     

A torque estimator using online tuning grey fuzzy PID for applications to torque-sensorless control of DC motors

DC motors are used indispensably in industrial applications because they provide such advantages as small size, high speed, low construction cost, and safe operation. A major area of research in DC motors is to determine a better method to measure the torque of motor shaft. The traditional way to measure the mechanical torque of a rotating shaft is attachment a torque transducer in the transmission system between the driving motor and the load. However, this technique requires additional parts for the transmission system, which makes the design more complicated, time consuming, costly in construction, and in many cases impossible to achieve.The purpose of this paper is to present a new method for estimating the load torque of a DC motor shaft by using a novel modelling method based on an adaptive control technique, named as online tuning grey fuzzy PID (OTGFPID). A test rig using a DC motor is setup to investigate the torque behaviour as well as to evaluate the developed estimator. Firstly, mathematical model is developed for the motor. Secondly, the experimental speed-torque data and the optimized motor model is used to optimize the torque estimator. Then the optimized estimator is used to estimate accurately the load torque. Finally, the capability of the optimized torque estimator has been validated with the practical experiments in comparison with a typical estimation method.     

基于虚拟仪器技术的伺服电机测试系统设计

虚拟仪器技术是测试技术和计算机技术两门学科的结晶,在此将现代虚拟仪器技术应用于船载测控雷达直流电机测试,设计了船载测控雷达直流伺服电机的在线测试系统,使用PID控制算法控制定标参量,通过TCP/IP协议实现了测试数据的远程共享和用户对测试系统的远程操控。该系统可以实现直流电机的负载控制以及对扭矩、转速、功率以及温度的实时监测。     

Analysis,modeling, identification and control of pancake DC torque motors: Application to automobile air path actuators

This article is focused on the working, modeling and control of pancake DC torque motors, used in automobile engine air path actuators. These motors, with a limited working angle, provide high torque which makes them suitable for use in actuators without any additional gear reduction. The torque is a nonlinear function of the motor angle. This article provides a modeling scheme, suitable for control purposes, which takes into consideration nonlinearities arising from friction and operating temperature. Comparison between simulation and experiments shows the effectiveness of the proposed model. Second order sliding mode control has been applied to the actuators for robust control under the influence of nonlinearities and uncertainties. The effectiveness of the control algorithm has been proven experimentally.     

Simulation and construction of a speed control for a DC series motor

DC series motors are preferred for mechatronic applications requiring high torque/speed ratios. This paper describes the design and implementation of an open loop DC motor speed control that is based on a micro-controller and on IGBTs. Trial and error designs are expensive and time consuming. This problem is solved here by using simulation tools which can predict the dynamic behavior of systems consisting of mechanic and electronic modules. The simulations provided along the paper show a satisfactory agreement with laboratory measurements.     

感应电机DTC系统减小启动电流策略

针对感应电机直接转矩控制(DTC)系统启动电流过大的问题。提出一种将直流预励磁措施应用于DTC中的方法,即在零电压矢量和某一固定有效电压矢量之间进行切换,当电流超过设定值时就切换到零电压矢量。仿真和实验结果表明,该方法能有效减小启动电流,增大启动转矩,改善了DTC的性能。     

A single-chip CMOS IC for closed-loop control of step motors

A CMOS integrated circuit for the closed-loop drive of step motors that avoids direct rotor position sensing is reported. The sequencer is integrated with the control circuit. The circuit has been fabricated on a 4 μm gate array, and its operation with the motor and chopper drive is characterized. Dynamic torque-speed characteristics, which are linear up to 85% of the maximum static torque with a 40% increase in power output compared to open-loop operation, have been obtained from a test motor. The CMOS integrated circuit controller makes the use of a step motor a viable alternative to series DC motors. It can be extended to provide a closed-loop drive circuit for step-mode operation     

Motor control and torque coordination of an electric vehicle actuated by two in-wheel motors

In this research, an electric vehicle actuated by two in-wheel DC motors is developed. By properly coordinating the motor torques, both drive-by-wire and electrical steering can be achieved. Two critical issues respectively related to the design of motor controllers and the coordination of the two motor torques under control saturation are investigated in this study. Firstly, as for the in-wheel motors that are used for driving and steering simultaneously, their operation covers a wider dynamic range that forward acceleration (deceleration), and reverse acceleration (deceleration) may occur alternately. To perform driving and steering smoothly and efficiently, each motor should be switched to an appropriate mode to generate the torque demanded. Secondly, during the high-speed maneuvering, the high back-emf voltage in the motor coil substantially reduces the motor’s torque generating capability. Since the electrical steering depends on the differential torque of two wheels, when electrical steering is demanded in this case, torque/current saturation may occur in either one of the motors and the electrical steering performance could be seriously degraded. To address these issues, controllers of two levels are proposed. For the low-level controller (the motor controller), it operates the motor automatically in an appropriate mode for performance and efficiency consideration. An input transformation is introduced to cancel the nonlinearity in current dynamics so as to control the motor torque easily and precisely regardless of mode switching. For the high-level controller (the torque coordination controller), besides generating reference commands to the low-level controllers, during control saturation it can also properly re-distributes control signals to maintain consistent steering performance and provides compensation for integrator windup. The control system is implemented and the performance is experimentally and numerically validated.     

机载SAR天线稳定平台伺服控制系统的算法设计改进

机载合成孔径雷达采用天线稳定平台对载机角运动误差进行补偿,使天线在惯性空间保持稳定并跟踪地速方向.平台数字伺服控制系统的设计采用单片FPCA替代DSP&CPLD现有方案,即在单片FPGA上完成数据采集、滤波及控制算法处理,并输出PWM信号进行电机调速控制.本文提出以双速度环控制替代传统的仅由光纤陀螺作为反馈元件的单速度环控制,并提出基于提升方案的小波阈值滤波、增益矩阵离线计算的常增益α-β-γ滤波、速度和加速度前馈等算法改进措施,在提高系统控制精度的同时,便于FPGA硬件实现以满足实时性要求,具有很强的工程应用价值.     

Self-tuning adaptive neurocontroller for brushless DC motors

This paper describes a self-tuning adaptive neurocontroller for brushless DC motors. Nonlinear and unknown motor dynamics are identified by using a multilayer neural network and the control input for the motor is derived from the identified model. The effect of the load torque on the control system is damped by filtering the control input. Simulation and experimental results show that the self-tuning adaptive neurocontrol has a good tracking performance but needs an adaptive filter and a parallel PI controller in the case of disturbances.