| 1. | So performances of the hydraulic hitch decide performances of tractor . theory and experiment are studied on the hydraulic hitch and the hydraulic loading
论文研究的内容主要是液压悬挂系统和液压加载系统的理论分析和试验研究。 |
| 2. | This kind of load can not be content with the increasing request of process of test load , when the test is needed to simulate actual working condition of the products
试验人员调整的依据是他们对设备的使用经验和双眼看到的测试设备显示的当前载荷。随着对试验加载过程要求的提高，原有的人工液压加载方式已不能满足这种要求。 |
| 3. | The test load can be put on samples by the way of mechanical , electric or hydraulic equipment . the hydraulic equipment has been widely used in practice because of the stability and low noise features
静力试验可以通过机械、电动和液压等加载方式完成，其中液压加载凭借良好的平稳性和运行中的低噪声，在工程试验中得到极为广泛的应用。 |
| 4. | This study includes design of the special loading - frame and hydraulic loading system for checking - up the lift capacity of tractor hydraulic lifter , besides , it involves the fixing and debuge and experimentation of the whole test bench
本设计研究主要包括拖拉机液压提升器提升能力检测专用加载框架的设计和液压加载系统的设计，另外还包括整机的安装与调试及试验。 |
| 5. | With the digital control , volume of compressive oil provided by hydraulic power unit in actuator can be regulated to modulate the test load value . in conformity with the idea , we developed two systems - force and displacement control system in this paper
根据这一设计思想，我们依据被控参量开发了两个液压加载分系统：力控制系统和位移控制系统，以满足不同的试验需求。 |
| 6. | Subsequently , designing the integration of hydraulic loop which makes whole system ' s structure more tighter and simplifies hydraulic loop , so , completing the deploy of hydraulic component . so as to completing the design of whole hydraulic loading system
为使系统结构布置紧凑、管路简化，根据选择的液压元件及已确定的液压回路设计了液压集成块，完成液压元件的配置，从而完成液压加载系统系统的设计。 |
| 7. | In formerly static strength tests , no attention was paid to the process of test load . according to their experiences , experimenters adjusted pressure in actuator only by hand to control the test load value and the load value was read from instruments
早期的静力试验对加载过程没有严格的要求，所以当时的液压加载方式由试验人员直接调整供油压力，改变液压缸内的油压，控制活塞杆输出的集中力载荷。 |
| 8. | The parameters which the rotate speed change , working resistance and depth are included synthetically control the hydraulic hitch in tractor . the tractor is working at best state . the performance sof tractor are best expect interferers
液压悬挂系统是拖拉机作业机组的一个组成部分，对液压悬挂系统和液压加载系统的性能进行最优控制理论分析和控制方法的研究，是保证拖拉机作业机组达到最优性能的基础。 |
| 9. | Based on the hydromechanics principle , the hydraulic equipment can push compressive oil into actuators by the pressure and direction control circuits . the piston of actuator translates distributed pressure into centralized force of piston rod
液压加载根据液压流体力学原理，利用液压元件组成的压力和方向控制回路，将一定压力的油液输入液压缸，由液压缸内的活塞把分布的油压转变为集中力，最后经活塞杆输出。 |
| 10. | At present , most load systems in china are fluid drive systems ; this paper solves two main difficulties in electro - motion system : the realization of speediness and the elimination of the superabundant torque . it can provide some new information in load system ' s further investigation
国内现有的加载系统多为液压加载，本文的研究工作解决了电动加载的两个主要难点：快速性的实现和多余力的消除，对加载系统的研究有一定的参考价值。 |
