The electro - hydraulic load simulator is a typical kind of passive force control system . it ’ s applied to simulate all kinds of loads on rudder under laboratory conditions , thus tradition all - objective experiments will be replaced by half - objective forecasting ones in the lab , so that the performances of rudder can be test conveniently on the ground 电液负载模拟器是典型的被动式力伺服系统,主要用于在实验室条件下复现舵面所受各种负载,将传统的实物实验变为实验室条件下的预测实验,从而达到在地面检测舵机性能的目的。
The jet engine is an implement that can produce instant control force . the force controlled by the electromagnetic valve , worked in the magnitude of millisecond . when hvp is rolling , the jets , positioned on the missile , turn on and off and the needed controlling force was developed 侧喷发动机是一种快速产生直接控制力的装置，其作用力的产生在毫秒( ms )数量级，通过电磁阀门控制其开关，喷口相对旋转火箭弹固定，在旋转火箭弹弹体旋转过程中改变喷口的开关状态，产生所需要的控制力。
The force control of suspension bridge anchorage cable is the main contents which will be researched . according to the character of suspen - sion bridge anchorage , three questions is solved in this paper on the basis of the construction control experience of the highway bridge of yichang yanzhi river . firstly , an effective method of cable force control is presented in this paper , which has settled the puzzle of cable force accurate operate through fixing a pressure transducer at the behind of the hydraulic jack . secondly , an exactitude calculation model is founded in this paper . in addition the influence of boundary condition , sag , inclination , flexural rigidity and environment temperature to the cable vibration frequency which make the frequency method could be used to the measurement of cable force . in the end of this paper , a control system of anchorage cable force is developed on the basis of the above research . this system is very steady , credible , high precision and convenient . it is a new and credible method to be used to the force control of sus - pension bridge anchorage cable . in this paper , the conundrum of cable force control has been solved . the fruits are very useful to the development of inland suspension bridge 提出了一种有效可行的锚跨张力控制方法，即通过在油压千斤顶后加压力传感器，并利用单片机技术进行数据采集，解决了悬索桥锚跨索股初张力精确控制的难题；建立了锚跨索股索力的精确计算模型，分析了索股的边界条件、斜度、垂度、抗弯刚度及环境温度对索股频率的影响，解决了弦振法在大跨径悬索桥索力测试中的应用问题；在上述研究成果的基础上，研制出了锚跨张力控制系统，该系统具有稳定可靠，精度高，使用方便等特点，它的投入使用将为我国今后大跨径悬索桥锚跨张力控制提供一种全新的、可靠的手段。
The rational cable force under dead load of gonghe bridge is calculated by the least bending strain energy method 2 . cable force controlled methords are introduced . the initial construction cable force of gonghe cable - stayed bridge are calculated by trial methord based on anvance analysis 3 介绍了斜拉桥施工中常用的施工控制方法及相应的索力控制方法，分析了公和桥施工中所采用的“二次张拉到位”的索力控制方法的特点和优点，通过基于正装分析的试算方法得出公和桥施工中拉索的初始张拉力。
