加速度

In this thesis, an attempt at considering the flexible joint as non-linear torsion spring has been made.

首先，建立了刚性杆非线性关节机器人的动力学模型，之后通过一平面3R机器人进行了数值仿真，说明了在一定情况下，关节的非线性对刚性杆机器人关节变形和末端误差具有重要影响，并在此基础上，讨论了关节线性项、杆的集中质量和关节驱动加速度对机器人关节非线性特性的影响。

Finally, based on the theory of Timoshenko beam, a beam model of this crankshaft is built, which is compared with solid model. The results indicate that this beam model can meet the needs of calculation precision and calculation efficiency. With this beam model, the condition in which real loads are put on the crankshaft is simulated. The displacement curves、velocity curves、acceleration curves of the main journals and the pulley of this crankshaft and torsion vibration curve of the pulley are then gained. With these curves, the dynamic characteristic of the crankshaft is analyzed. The conclusion indicates that this crankshaft has good dynamic characteristic.

最后利用Timoshenko梁理论建立了曲轴的梁单元模型，将此梁单元模型与体单元模型进行了比较，结果表明梁单元模型能够满足精确度和计算效率的要求；利用该梁单元模型，模拟了实际条件下的载荷作用时曲轴的响应，得到了曲轴各主轴颈和皮带轮端的位移、速度、加速度曲线以及皮带轮端的扭转振动曲线，分析了曲轴的动态特性，结论表明该型曲轴具有良好的动态特性。

During the experiment, we choose Toyota Corona 1600cc as a test car and measure its maximal acceleration value by means of palm vibration noise analyzer, on conditions of the same tire pressure, speed, load, and road section and measure fuel consumption in a fixed speed and mileage. In addition, by using tire pressure gauge and infrared thermometer, measure after-driving tire pressure and tire temperature to make a comparative analysis. Finally, we use 185/60 R-14 Goodyear tire to measure tire sinkage in an empty car and a loaded car and obtain tire compression ratio to explain the difference of riding comfort and economical consideration of fuel consumption between nitrogen-filled tires and compressed air tires.

在实验时，采用丰田Corona 1600cc轿车，在相同的胎压、车速、负载、路段等条件下，透过掌上型振动噪音分析仪，撷取车辆行驶之最大峰值加速度；并在稳定车速及固定里程下量测汽油之消耗量，再以胎压表和红外线温度计，量取行驶后之胎压和胎温值来作比较分析，最后，再使用185/60 R-14 Goodyear 轮胎，在车上量测空车及负载下轮胎的下沉量，并求得轮胎的压缩率变化值，来说明氮气轮胎与一般压缩空气轮胎，在乘坐舒适性及燃油经济性上的差异原因。

This simulated rocket can simulate the acceleration,thrust time,speed at burning end,rotation speed and so on satisfily.It is not only suitable for firing test during development,but also delivery test.This simmulated rocket does not require ideal experiment environment,is easy to be implemented.It is characterized by high security,low cost,shortening the fuze researching period and other benifits.

该弹可以相当满意地模拟火箭弹的加速度、推进时间、主动段末速、转速等主要参数，非常适合火箭弹触发引信研制中的靶场射击试验和生产交验，具有对试验场地要求低、试验简便、安全性高、成本低、有利于缩短引信研制周期等优点。

The constraints of the missile flying with SAR at the flight time are built, and the missile command acceleration is used as control variables to set up the objective function about the dwell time and the desired azimuth resolution. The control variables are optimized using the genetic algorithm, and an optimal trajectory is gotten.

首先建立了弹载SAR条件下导弹飞行的约束，然后以导弹指令加速度为优化变量，构造了与方位分辨率和波束驻留时间相关的目标函数，采用遗传算法进行寻优，设计得到了弹载SAR平台的优化弹道。

After considering the earth rotation and non-conservative forces energy dissipation, the energy conservation equation was presented. The formula of the gravitation potential and tide-generating force additional potential of sun and moon were given in detail.

给出了地心惯性系下顾及地球自转和非保守力能量损耗的能量守恒方程，并且对日、月摄动位与引潮力附加位的计算方法作了相应的分析，同时介绍了加速度数据的处理方法。

Main works of the author:(1) Has developed a design of charge amplifier which using a kind of integrated chip replace a large number of leave components, though all the realized proposal of measurement circuit for the piezoelectric accelerometer;(2) Has made the circuit board;(3) Has proposed a programme-controlled scheme in the sensitivity throw-over of charge convert and gain throw-over of output amplifier;(4) Has done the experiment, give the experimental result;(5) Has done the error analysis based on the experimental result and the principle of the charge amplifier.

作者完成的主要工作包括：(1)通过对压电加速度传感器的测量电路的各种实现方案的深入调研，提出了一种用集成芯片取代大量分离元件的电荷放大器的实现方案；(2)制作了完整的电路板；(3)在电荷转换部分的灵敏电容的切换和输出放大级的增益切换电路的实现上提出了程控的方案；(4)进行了实验验证，给出了实验结果；(5)在实验结果的基础上，结合电荷放大器原理对系统作了误差分析。

Then thickness of the work piece, location of the locator, frequency of the sinusoidal load were changed, and end milling simulation was conducted. The stress, displacement, velocity, acceleration from different cases was compared.

同时通过改变工件厚度、改变定位块位置、改变正弦载荷的频率等参数，分别对各种情况进行仿真，并对获得的应力、位移、速度、加速度的变化进行了比较分析。

The Nano-electromechanical sensors, such as membrane pressure sensor, four-beam accelerometer and bionic vector hydrophone, are fabricated successfully by micro control-hole technology, and they are measured in pressure tank, jarring table and standing wave tube respectively.

采用控制孔技术成功加工出了基于RTS的圆膜压力、四梁加速度和仿生矢量水声三种新型纳机电器件，并分别对其进行了压力罐、振动台和水下驻波测试。

Based on this equation, the calculation formular of the walking beam's swing angular displacement, angular velocity, angular accelaration and the distance, velocity, accelaration in the hanging point movement are obtained.

以兰通产CYJ2.726B型抽油机为例进行了计算，并在0°～360°曲柄转角范围内绘制了悬点运动速度和加速度的变化曲线，从而给出了游梁式抽油机悬点运动参数计算的一种方法。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。