动电的

Three actuation mechanisms of piezoelectric composite structures are studied: extension actuation mechanism, shear actuation mechanism and hybrid actuation mechanism Tip deflection of piezoelectric composite plate is analyzed for different actuator layer thickness. The research result can be used for mode control of active noise and vibration control and static shape control of intelligent structure.

研究了压电材料复合板的3种作动机制，弯曲作动机制、剪切作动机制、混合作动机制，针对粘贴在纤维板上不同厚度的压电作动层，具体分析了复合板的端部位移，研究结果对噪声和振动的主动控制中的模态控制和智能结构静态形状控制提供了一定的参考。

A high order finite element model of a duralumin flexible beam with distributed piezoelectric sensors and actuators was presented in this paper. The beam equation was developed incorporating the stiffness, mass and electromechanical coupling effects of the piezoelectric apparatuses.

本文针对一套表面粘贴有分布式压电传感器和致动器的LY12智能材料柔性臂系统，在对系统组成进行分析的基础上，建立了柔性臂实验系统的有限元模型，并采用自由度凝聚法对该模型进行了降阶处理，以方便控制器设计。

Dielectric elastomer can yield extremely large strain and elastic energy density in DC electric field, which makes it to be used as basic material of actuators for subminiature machine, even as ideal material of artificial muscle for subminiature robot in future.

电场活化聚合物在直流电场作用下会产生极大的应变和弹性能，这就使得这类材料可以用于作为微型机械中电致动器的基础材料，甚至被视为将来在机器人、特别是微型机器人中制造人造肌肉的理想材料。

The objective of this research was control a long stroke inchworm type positioning stage. Consider the factors that may affect positioning precision include the nonlinearity of piezoelectric actuator and phase lag cause by feedback control. Use model of hysteresis and zero phase error tracking controller to improve the tracking ability and reduce the phase lag of the system.

因此在本研究中，对於一个蚇蠖式长行程平台研究控制方法，考虑可能影响定位精度的因素，包括压电致动器的非线性特性与系统因为闭回路控制架构造成的响应相位落后现象，利用迟滞数学模型的建立与零相位误差追踪控制器的设计来改善系统的追踪能力与相位误差。

Whereas solenoid valves have a fixed displacement, that of a piezo actuator can be varied.

鉴于螺线阀的转位是固定的，而压电致动器的转位可以变换。

For the four laterals simply supported plate, the transverse deflection of plate is expanded over the modal shapes, the electroelastic model with self-sensing actuators plate is given, and the current is considered as output variable of measurement equation. Generalized modal coordinates being state variables, LQG and H∞control is proceeded using the state space equation.

将板的横向位移按模态展开，对配置压电自感作动器的薄板建立了模型，给出以广义模态坐标为状态变量的状态方程和以传感电流为输出的观测方程，在此基础上，对系统进行了LQG控制和H∞控制。

The current decay of CO oxidation at Pt SPE gas sensing electrode in short time scale has been studied.

对短时间内Pt－SPE气敏电极上CO氧化电流的衰退现象的研究表明，Pt表面无CO吸附态情况下，衰退主要与电极阳极极化后Pt表面氧化程度加深有关；采用动电势扫描法可使电极对CO氧化的催化活性基本恢复，但随着电极的进一步极化，衰退仍会继续。

Thus,locks through the rail switch electricity the contact locks for the signal electricity the magnet coil delivers the electric current,only then the switch location correct only then causes the closed circuit,the signal electricity to lock has the enough electric current,after namely the approval moves the signal handle to cause the semaphore opens,by the signal electricity locks the contact for the rail switch electricity to lock the magnet coil power transmission electric circuit to separate,therefore cannot move the rail switch handle again,soon the rail switch locks in the position.

这样，通过道岔电锁器的接点给信号电锁器的电磁线圈送电流，只有道岔位置正确才使电路接通，信号电锁器有足够电流，即准许扳动信号握柄使信号机开放后，由信号电锁器的接点给道岔电锁器电磁线圈送电的电路被断开，于是再不能扳动道岔握柄，即将道岔锁在规定位置上。

In this paper firstly the damping principle of TCBR is analyzed, and it is proved that under appropriate condition the positive damping could be obtained.

摘 要：可控制动电阻的电阻值可以随时连续调节，这为改善系统稳定性提供了有效的手段。

OBJECTIVE: To verify the influence of low-tension pulse electric stimulation on the course of myocardium differentiation, analyze its molecular biological mechanisms during the differentiation of rat bone marrow mesenchymal stem cells into cardiomyocytes.

目的：大鼠骨髓间充质干细胞向心肌细胞诱导分化过程中，验证课题提出的低压脉动电刺激对心肌分化过程影响的假设，并分析其分子生物学机制。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。