This paper narrated the principle of motorcycle anti - lock brake control , provided the calculating method of controlling parameter and derived a formula about the braking pressure and friction factor of real road conditions . a mechanical motorcycle anti - lock brake controller was contrived and the series - design theory was completed on the basis of this formula ; the construction parameters and design of nonlinear - spring were also addressed . the construction of testing system was designed and controlling principle was narrated 本论文首先分析了摩托车制动时车轮的受力及运动状况，建立防抱死控制的数学模型，推导了控制参数的计算公式；在分析盘式制动器设计计算方法的基础上，提出针对已知摩托车车型、盘式制动器参数及路面条件的情况下，防抱死控制器理想控制压力的计算公式。
It is necessary to control the mechanical stimuli precisely in the studies of cardiac mechano - electrical feedback ( mef ) . in the present study a ventricular pressure - clamping system has been developed , which can be applied to isolated - perfused rabbit hearts . controlled by a computer , this system not only can make the left ventricle follow a command defining the same pressure wave as that during a beating cycle under physiological condition , but also deliver mechanical stimuli with a proper waveform to the ventricle at a particular time phase . this system integrates multiple functions , including perfusing , pacing , recording of electrocardiogram and monophasic action potentials , and clamping and measuring of ventricular pressures in isolated - perfused hearts . thus , it is a distinct system for investigating the phenomena and mechanisms of cardiac mef at organ level 在心脏机械电反馈的研究中准确控制机械刺激是非常重要的.本研究室构建了一套适用于离体家兔心脏的心室压力钳系统.该系统通过计算机控制压力钳,不仅能模拟正常生理条件下左心室的压力波形,还能在心室活动周期的特定时相、以适当波形对心室施加机械刺激.该系统集心脏灌流与起搏、表面心电图记录、单相动作电位记录、心室压力钳制与测定等多种功能于一体,特别适用于器官水平上观察机械电反馈现象并探讨其机制
Abstract : it is necessary to control the mechanical stimuli precisely in the studies of cardiac mechano - electrical feedback ( mef ) . in the present study a ventricular pressure - clamping system has been developed , which can be applied to isolated - perfused rabbit hearts . controlled by a computer , this system not only can make the left ventricle follow a command defining the same pressure wave as that during a beating cycle under physiological condition , but also deliver mechanical stimuli with a proper waveform to the ventricle at a particular time phase . this system integrates multiple functions , including perfusing , pacing , recording of electrocardiogram and monophasic action potentials , and clamping and measuring of ventricular pressures in isolated - perfused hearts . thus , it is a distinct system for investigating the phenomena and mechanisms of cardiac mef at organ level 文摘:在心脏机械电反馈的研究中准确控制机械刺激是非常重要的.本研究室构建了一套适用于离体家兔心脏的心室压力钳系统.该系统通过计算机控制压力钳,不仅能模拟正常生理条件下左心室的压力波形,还能在心室活动周期的特定时相、以适当波形对心室施加机械刺激.该系统集心脏灌流与起搏、表面心电图记录、单相动作电位记录、心室压力钳制与测定等多种功能于一体,特别适用于器官水平上观察机械电反馈现象并探讨其机制
Due to this alarm contact it is not only possible to achieve an extremely reliable control of pressures in various production equipments or in the energy production , but also these indexing mechanisms directly integrated in the high pressure gauges make the controlling of pressures in almost all conceivable technical facilities possible 有了警报接点，不仅能在各种生产设备或能源生产中非常可靠的控制压力，而且这些指示装置直接安装在高压压力表里，使该压力表能控制几乎所有的技术设备里的压力。
But there are some defaults in conventional balance values , such as low - frequency vibration , excessive high controlling - pressure , disadvantage in stability and safety , complicated construct etc , the key matters are that the valves neither work solely nor run synchronously in two cylinders 但传统的平衡阀存在着不少缺点，如低频振动、控制压力偏高、工作平稳性和安全性较差、结构较复杂等，关键问题是在双杠变幅等回路中，既不能单独应用，又不能实现双缸同步运行。
