基于LM629的电机伺服控制系统设计

为了缓解运动控制系统中上位机的工作负担,提出了一种基于电机专用控制器LM629的电机伺服控制系统方案.LM629强大的实时运动控制性能大大减轻了上位机的工作压力,很大程度上简化了电机伺服控制系统的软件、硬件设计,提高了系统的稳定性.     

基于CAN总线的多轴同步运动控制系统

针对工业上现代机电设备广泛采用的主从式同步运动控制器不能解决任意轴负载变化对同步性能的干扰等问题。在CAN总线基础上,采用虚轴法的同步控制策略,设计了一个网络化、开放式的多轴同步运动控制系统。使用专用运动控制芯片LM628作为电机的运动控制器,简化了系统的软硬件设计。实验结果证明该方法可解决多电机在运动中出现负载扰动时如何保持同步的问题。     

二维模糊控制器在小型轮式机器人中的应用

为了提高小型轮式机器人电机系统的运行性能,设计了一种带修正函数的二维模糊控制器.首先阐述模糊控制器的基本结构,并结合具体控制对象设计了fuzzy论域和模糊控制规则;其次设计了实现该控制器的嵌入式平台.最后给出了实验结果,实验证明了该模糊控制器的有效性.     

PMSM矢量控制在雕铣机进给系统中的实现﹡

永磁同步交流伺服电机（PMSM）是数控雕铣机进给系统中的一个关键部件,其控制方法对伺服系统的性能起重要作用。建立了该类电机的数学模型并研究了矢量控制原理,并采用DSP控制器实现了伺服电机的电流、速度双闭环控制系统并测试了该控制系统下电机的转速、电流及转角。最后对比了运动控制仿真结果与实验结果,验证了该控制方法的可行性和准确性,为该类电机的控制以及在数控机床上的应用提供了理论依据。     

基于DSP的三肢体机器人关节控制器设计

基于TI公司的TMS320LF2407设计了一种直流伺服电机运动控制器,以实现三肢体仿生步行机器人11个运动关节的伺服控制.首先采用遗传算法对电机的PID参数进行优化,并对关节运动转角轨迹进行离散化,电机运动控制采取分段PID的策略,以减小关节转角误差.实验结果表明,设计出的控制器工作性能稳定,能够满足机器人运动控制的要求.     

多轴步进电机CAN总线控制系统设计

设计了一种基于CAN总线的多轴步进电机运动控制系统。系统由PC机、CAN收发器、CAN控制器、单片机、步进电机及其驱动器等部分组成。系统由PC机通过CAN总线向各轴步进电机控制器发送控制命令,实现多轴步进电机的同步运动控制。将各轴步进电机安装在采摘机械手上进行机械手运动控制试验,结果表明该系统稳定可靠。     

基于DSP的PLC运动功能的研究

为解决可编程逻辑控制器（PLC）传统CPU难以实现电机运动控制的问题,提出了一种基于梯形图翻译形式以及梯级执行机制的DSP．PLC架构,通过一套具有运动控制特点的指令集实现了可编程控制器的运动控制功能,并给出了运动控制的关键技术前后台动态（FBD）调度算法。实验结果表明,DSP—PLC构架既发挥了DSP高速处理的优势,又体现了PLC图形化的编程特色,且调度算法简单有效,可适用于电机运动控制系统。     

基于双绕组无刷电机的冗余控制系统设计

文章以双绕组无刷电机为研究对象,对其特点进行了分析,并建立这种结构形式电机的数学模型。采用两套独立的DSP控制器,对双绕组无刷电机控制系统进行设计,给出了控制系统仲裁器的硬件设计方案以及系统输出同步性控制方法,并分析了系统的可靠性。文章最后对所设计的控制系统进行了实验测试,结果表明系统的工作方式撤换灵活,具有较高的可靠性和良好的工作性能。     

双通道闭环步进电机控制器设计

针对单边驱动的大跨度、长行程直线运动平台存在翻转力矩的问题,设计并开发了一套双通道闭环步进电机运动控制器。采用“控制+驱动”的硬件架构,以STM32和FPGA为控制核心,设计了该运动控制器的硬件电路,并紧密结合数控系统原理,设计了控制器系统软件架构;在经典PID闭环调节架构的基础上,引入同步偏差调节项构成了适用于双通道同步偏差调节的新型闭环同步运动控制算法;搭建了典型的“双边驱动”实验平台,分别在空载工况、带载工况和变载工况下,以不同的速度和位移指令测试了该运动控制器的定位误差、同步误差和加减速性能。研究结果表明:双步进电机的位置定位误差和位置同步误差均保持在0～0.095 mm范围内,系统运行流畅且无任何卡顿现象,达到了预期的功能和性能要求。     

一种基于DSP的伺服控制器的设计与应用

介绍了一种由专用电机控制芯片DSP MotionChip作为核心的伺服控制器，该伺服控制器可以方便的用于各种运动控制系统中。文章详细地介绍了该伺服控制器的硬件组成原理、软件结构方案，以及由多个这种伺服控制器组成的多轴运动控制的方法。     

Practical motion control with acceleration reference for precision motion—New NCTF control and its application to non-contact mechanism

This paper presents an improved practical controller for enhancing precision motion performance. For practical use, high motion control performance and ease of controller design are desired. A nominal characteristic trajectory following control (NCTF control) has been studied to satisfy the desired response. The NCTF controller consists of a nominal characteristic trajectory (NCT) which is the reference motion of control system and a compensator which makes the motion of the controlled object to follow the NCT. The NCT is easily determined from experimental open-loop time responses of the mechanism. The controller parameters can be also determined easily, without any given model parameters. In the present paper, the Continuous Motion NCTF controller for high continuous motion performance is improved in order to enhance the following characteristic of the object motion on NCT and improve the positioning and tracking accuracies of the system. The improved Continuous Motion NCTF controller (referred to as Acceleration Reference-Continuous Motion NCTF controller (AR-CM NCTF controller)) provides the advantages such as the high overshoot reduction characteristics and the low sensitivity disturbance. The AR-CM NCTF controller includes the structure of the Continuous Motion NCTF controller and acceleration reference for the object motion as the additional controller elements. The design procedure of the AR-CM NCTF controller remains easy and practical. In order to confirm the advantages, the AR-CM NCTF controller was examined in positioning and tracking motion performances using the non-contact mechanism. The experimental results prove that the AR-CM NCTF controller achieves the better positioning and tracking performances than the Continuous Motion NCTF controller.     

一种新型独立式运动控制器的研究

提出了一种基于CAN总线软连接的嵌入式独立型运动控制器,并从硬件和软件结构两个方面对控制器进行了研究,充分利用了MPC5200丰富的硬件资源.而且通过Linux+RTAI的双内核实时系统的加载,使运动控制器具有良好的硬实时性、开放性和灵活性.最后给出了该运动控制器的一个应用实例.     

A practical control method for precision motion—Improvement of NCTF control method for continuous motion control

The present paper describes a practical control method for a precision motion system and the performance thereof. For practical use, high motion control performance and ease of design and controller adjustment are desired. A nominal characteristic trajectory following control (NCTF control) has been investigated to realize high performance and ease of application of point-to-point (PTP) positioning. The controller comprising a nominal characteristic trajectory (NCT) and a PI compensator is free from exact modeling and parameter identification. In the present paper, the NCTF control is modified in order to improve the control performance of continuous motions such as tracking and contouring motions. The NCTF controller for continuous motion (referred to as Continuous Motion NCTF controller) has a structure that is almost identical to the conventional NCTF controller and is designed using the same design procedure. The Continuous Motion NCTF controller is applied to ball screw mechanisms, and its motion control performance is evaluated from the experimental tracking, contouring, and positioning control results. The experimental results prove that the Continuous Motion NCTF controller achieves the same positioning performance as the conventional NCTF controller, and generally achieves better continuous motion control performances than PI-D or conventional NCTF controllers. In 0.25 Hz and 100-nm radius circular motion, the experimental tracking errors for Continuous Motion NCTF were smaller than 10 nm.     

A Self-Organising Fuzzy Logic Controller for a Coordinate Machine

For a 3D coordinate measurement system, the dynamic accuracy of the moving table will influence the measuring accuracy directly. If a classical PID controller were designed for this measuring table without an accurate mathematical model, the gain parameters may need to be regulated frequently by trial-and-error to obtain the precise motion control objective, good adaptability, and robustness. In this paper, a model-free fuzzy controller and a self-organising fuzzy controller (SOFC) were employed to eliminate the above controller design problems and improve the tracking control accuracy. The control performances of these intelligent control strategies were compared, based on the experimental results. The SOFC has the best tracking accuracy and its learning ability significantly reduces the trial-and-error design effort of a traditional fuzzy controller.     

Disturbance observer and adaptive controller design for a linear-motor-driven table system

This paper presents a disturbance observer and adaptive controller design for a direct drive motion control system. An indirect adaptive controller is implemented to achieve desired tracking performance as well as deal with system parameters variation. To reduce tracking errors, a newly designed adaptive feed-forward controller is proposed based on an on-line estimated inverse model of the linear motor drive system. A digital disturbance observer is implemented to be included in the proposed feedback-feed-forward control structure to compensate for the undesired nonlinearity and external load disturbance of the direct drive system. Experimental results show that this control scheme can achieve superior contouring accuracy, disturbance rejection and robustness under the influence of friction and cogging force.     

Precision tracking control of a piezoelectric-actuated system

In this paper, precision tracking control of piezoelectric-actuated systems is discussed. In order to obtain precision tracking control, a modified Prandtl–Ishlinskii (MPI) model is used to model the hysteresis nonlinearity. Then, the inverse MPI model is used to reduce the hysteresis nonlinearity, and a sliding-mode controller is used to compensate for the remaining nonlinear uncertainty and disturbances. In general, the piezoelectric-actuated system can be modeled as a linear model coupled with a hysteresis. When the linear model is identified, it is used to design the sliding-mode controller. Finally, this design method is applied to the motion control of a nano-stage, and experimental results are presented to verify the usefulness of this method.     

液压驱动6自由度运动模拟器动力机构控制策略研究

目前,非对称缸动力机构作为驱动部件被广泛应用于液压驱动6自由度运动模拟器,其控制器设计备受关 注。首先推导出了阀控非对称缸动力机构的通用非线性数学模型,在此基础上提出了级联负载压力控制策略,使 得动力机构具有力发生器的特性,从而为进一步实现运动模拟器的分层控制打下了基础。对于每个非对称缸电液 位置伺服系统,考虑到模型不确定性及外干扰的存在,运用滑模变结构控制方法设计外层镇定控制器,实现了对 液压动力机构的镇定及对外界干扰的抑制。同时作为比较,还设计了状态反馈控制器。仿真结果表明提出的控制 策略是有效的、合理的。     

多轴运动控制器的设计

本文提出了一套基于DSP内核的运动控制器的设计方案。该运动控制器是步进电机的下位控制单元，它与PC机构成主从式控制结构，之间通过USB总线进行连接。PC机负责人机交互界面的管理和控制系统的实时监控等方面工作，运动控制器完成运动控制的所有细节。     

Adaptive robust motion trajectory tracking control of pneumatic cylinders with LuGre model-based friction compensation

Friction compensation is particularly important for motion trajectory tracking control of pneumatic cylinders at low speed movement. However, most of the existing model-based friction compensation schemes use simple classical models, which are not enough to address applications with high-accuracy position requirements. Furthermore, the friction force in the cylinder is time-varying, and there exist rather severe unmodelled dynamics and unknown disturbances in the pneumatic system. To deal with these problems effectively, an adaptive robust controller with LuGre model-based dynamic friction compensation is constructed. The proposed controller employs on-line recursive least squares estimation（RLSE） to reduce the extent of parametric uncertainties, and utilizes the sliding mode control method to attenuate the effects of parameter estimation errors, unmodelled dynamics and disturbances. In addition, in order to realize LuGre model-based friction compensation, the modified dual-observer structure for estimating immeasurable friction internal state is developed. Therefore, a prescribed motion tracking transient performance and final tracking accuracy can be guaranteed. Since the system model uncertainties are unmatched, the recursive backstepping design technology is applied. In order to solve the conflicts between the sliding mode control design and the adaptive control design, the projection mapping is used to condition the RLSE algorithm so that the parameter estimates are kept within a known bounded convex set. Finally, the proposed controller is tested for tracking sinusoidal trajectories and smooth square trajectory under different loads and sudden disturbance. The testing results demonstrate that the achievable performance of the proposed controller is excellent and is much better than most other studies in literature. Especially when a 0.5 Hz sinusoidal trajectory is tracked, the maximum tracking error is 0.96 mm and the average tracking error is 0.45 mm. This paper constructs an adaptive robust controller     

基于PMAC的大惯量转台运动控制系统研究

本文介绍了一种以DSP为核心的多轴运动控制器(PMAC),提出了一种基于PMAC的大惯量转台运动控制系统,论述了系统总体设计并进行了试验,试验结果表明该系统很好地满足了转台实时运动控制的要求.