共查询到20条相似文献,搜索用时 171 毫秒
1.
仿肌肉驱动器及其在仿生机器人中的应用 总被引:1,自引:1,他引:0
仿肌肉驱动器是模拟动物肌肉工作原理的新型驱动装置,因其和动物肌肉相似的特点,得到了广泛的应用.对国内外仿肌肉驱动器的研究和开发,从制作材料和机械装置、结构仿生、控制仿生和在不同类型运动仿生机器人中的应用等方面进行总结和概述,并提出仿肌肉驱动器未来的发展趋势. 相似文献
2.
3.
4.
5.
6.
7.
介绍了波形板生产线电气控制系统的设计方案。该设备工艺过程和控制功能非常有特点,其控制系统涉及到PLC、A/D转换、D/A转换、触摸屏、伺服驱动器、变频器、激光位移传感器、超声波位移传感器及总线通信技术等。本设计方案对类似的工业控制场合具有一定的参考意义。 相似文献
8.
9.
以W220落地镗铣床电气控制系统设计项目为依托,详细描述了先进的自动控制技术在大型镗铣床控制系统中的具体应用.该控制系统采用三菱Q02H PLC作为控制器,模块化的590+直流调速器为电机驱动器,配合各种检测和控制设备完成镗铣床的控制功能及状态的检测功能. 相似文献
10.
11.
The utility of heart-rate variability (HRV) to index important aspects of neural control of the heart has made it one of the most valuable tools for researchers interested in health and behavior. However, most of the literature and extant data on the central origins of HRV have been derived from animal models. As yet little is known about the central nervous system (CNS) origins and concomitants in humans. In the following we will briefly detail a set of neural structures that have been associated with important CNS functions including cardiac regulation and emotional regulation. We will briefly summarize recent data using pharmacological, neuroimaging, and psychophysiological techniques that have examined CNS concomitants of HRV especially during emotion. Based on these and other data will we report the results of a computational model that examined the interactions of several neural structures and their effect on emotion-related HRV. 相似文献
12.
13.
H Aiyar T A Stellato R P Onders J T Mortimer 《IEEE transactions on rehabilitation engineering》1999,7(3):360-371
We have developed an endoscopic instrument that will allow a surgeon to safely, dependably and accurately place intramuscular (IM) electrodes in the diaphragm. This instrument has been used to implant 28 IM electrodes in the diaphragms of eleven acute and four chronic dogs. All electrodes achieved full activation of the diaphragm muscle, producing tidal volumes up to 130% V(TCRIT), the critical volume necessary for basal ventilatory support, with unilateral stimulation. The surgeon is able to control the angle of the IM electrode insertion needle, which enables the needle to approach the diaphragm at an angle that is parallel to the surface of the muscle. This insures good control over the depth of needle penetration into the muscle, which greatly reduces the risk of accidentally passing the needle through the diaphragm and entering the thorax. Endoscopic placement of IM electrodes into the diaphragm opens opportunities to provide cost effective negative pressure ventilation to patients who are unable to effect sufficient ventilation by central nervous system (CNS) control of respiration. 相似文献
14.
Allum J.H.J. Carpenter M.G. Honegger F. 《IEEE engineering in medicine and biology magazine》2003,22(2):37-47
This article attempts to highlight the new insights into balance control that have been gained by using multidirectional perturbations and to demonstrate how this new focus enables a better understanding of how the central nervous system (CNS) malfunctions in patients with balance disorders. Multidirectional perturbations have proven to be a valuable tool to better understand dynamic postural control in normal and balance-deficient populations. The advantages gained by using multidirectional perturbations to exert joint displacement profiles at different levels and in different directions has allowed greater insight into how passive joint characteristics and active muscle synergies are triggered and shaped by peripheral and central sensory systems to elicit directionally specific postural responses to avoid a fall. 相似文献
15.
变电站巡检机器人软件系统的设计 总被引:1,自引:0,他引:1
变电站巡检机器人主要应用于室外变电站的设备巡视检查,一定程度上代替了人工巡检,提高了变电站的自动化程度。其软件系统包括移动站、基站、集控站,为了适应整个系统不断变化的要求,软件系统需要具有很好的灵活性和可扩展性。采用代理机制,将具体的设备屏蔽,可以很好的应对物理设备的变化。在此基础上给出了移动站、机器人代理、基站、集控站的设计和实现,并将基站和集控站作为后台软件进行统一设计和实现。 相似文献
16.
Neural microstimulation is becoming a powerful tool for the restoration of impaired functions in the central nervous system. Microelectrode arrays with fine wire interconnects have traditionally been used in the development of these neural prosthetic devices. However, these interconnects are usually the most vulnerable part of the neuroprosthetic implant that can eventually cause the device to fail. In this paper, we investigate the feasibility of floating-light-activated microelectrical stimulators (FLAMES) for wireless neural stimulation. A computer model was developed to simulate the micro stimulators for typical requirements of neural activation in the human white and gray matters. First, the photon densities due to a circular laser beam were simulated in the neural tissue at near-infrared (NIR) wavelengths. Temperature elevation in the tissue was calculated and the laser power was retrospectively adjusted to 325 and 250 mW/cm(2) in the gray and white matters, respectively, to limit ΔT to 0.5 °C. Total device area of the FLAMES increased with all parameters considered but decreased with the output voltage. We conclude that the number of series photodiodes in the device can be used as a free parameter to minimize the device size. The results suggest that floating, optically activated stimulators are feasible at submillimeter sizes for the activation of the brain cortex or the spinal cord. 相似文献
17.
Panetsos F. Avendano C. Negredo P. Castro J. Bonacasa V. 《IEEE transactions on neural systems and rehabilitation engineering》2008,16(3):223-232
We have investigated the alterations that the long-term implant of sieve electrodes to the peripheral nerves could evoke in the central nervous system by studying the neural activity at various levels of the somatosensory system [the implanted nerves, the dorsal column nuclei (DCN), and the primary somatosensory cortex (SI)] up to 30 months after implantation of the electrode in the distal median nerve in adult cats. This long survival period, which could correspond to 15 years within a human lifespan, enabled us to confirm the biocompatibility of the electrode. We also performed histological and molecular studies on sections of the spinal cord, DCN, and SI and electrophysiological recordings on of DCN and SI. Although in the ldquoimplantedrdquo regions (ipsilateral nerve, ipsilateral DCN, and contralateral SI) there was apparently a good recovery of a number of molecular markers, mostly related to local metabolism and neurotransmission in central relay structures, the expression of calcium-binding proteins in the cortex, which identifies inhibitory interneurons, remained clearly abnormal, although they were never as altered as in case of irreversible, chronic denervations. Also, prominent anatomical disorganization was detected in the normal spatial arrangement of neural clusters within the DCN. With respect to the electrical activity the ldquoimplanted siderdquo showed minor changes in response latency, intensity, and somatotopy, compared to control recordings. These findings show that central sensory-processing structures achieve fair, but not complete, levels of structural and functional reorganization following chronic intraneural implants of sieve electrodes. 相似文献
18.
19.
20.
中央制冷空调冷冻水系统模糊RBF控制研究 总被引:1,自引:0,他引:1
针对中央空调冷冻水系统回水温度快速准确调节问题,提出基于模糊径向基函数(radial basis function,RBF)网络的变流量回水温度智能控制方法。首先,对冷冻水系统旁通阀门的水量开度、泵组转速等输入量,按照模糊控制理论,进行模糊化与反模糊化处理,获得归一化的输入信息向量;然后,利用能够全局寻优的RBF网络进行温度预测,不断迭代预测产生理想的预测温度;最后,当期望温度与预测迭代的温度残差小于门限值时,停止迭代,输出并记录温度,完成冷冻水系统的非线性温度控制。仿真实验表明,相比于传统反向神经(back propagation,BP)网络控制,RBF控制方法迭代次数更少且精度更高,能够提高系统的整体性能。 相似文献