pi
英 [paɪ]
美 [paɪ]
n. 圆周率; 希腊字母表的第16个字母
复数：pis
BNC.8364 / COCA.18727
牛津词典
noun
- 圆周率
the symbol π used to show the ratio of the circumference of (= distance around) a circle to its diameter (= distance across), that is about 3.14159 - 希腊字母表的第16个字母
the 16th letter of the Greek alphabet (Π, π)
柯林斯词典
- 圆周率（通常用希腊字母�表示，近似值为3.142）
Piis a number, approximately 3.142, which is equal to the distance round a circle divided by its width. It is usually represented by the Greek letter �.
英英释义
noun
- the 16th letter of the Greek alphabet
- the ratio of the circumference to the diameter of a circle
双语例句
- Then the PI tuning method of SISO was used to obtain the optimal PI controller for each loop.
利用SISO系统PI控制器设计方法确定每个环路的最优PI控制器。 - The inner loop adopts PI algorithm and the outer loop adopts a time optimal self-tuning PID algorithm.
伺服控制器分别采用有源PI校正和时间最小参数自调整PID控制算法。 - In this paper, a novel control strategy of fuzzy-PI control is presented for single-phase SPWM inverter.
为提高永磁同步电动机控制系统的抗扰性能，设计了一种新型的模糊PI控制器。 - Predictive voltage feedback PI controller with feedforward voltage compensator is adopted as the controlled method of the inverter system.
针对在光伏并网系统中采用单纯PI控制的缺点，提出了增加电网电压前馈控制来改善并网电流波形。 - In our self-Oscillation drive system, the stable error of the oscillation amplitude is eliminated by the PI controller.
在该闭环驱动系统中，通过引入PI控制器消除了振动幅度控制的稳态误差。 - Considering the characteristics of PMSM, a fuzzy-PI control method based on the fuzzy decision and relay self-tuning was proposed.
针对永磁同步电机的特点，提出了基于模糊决策和继电自整定的模糊PI控制方法。 - The test results show that it has better performance both in dynamic and steady state than traditional PI control.
此方法计算量小，实验证明获得了较传统PI控制更好的动静态性能。 - Simulation results show it is better than classic PI optimal controller.
仿真结果表明，它也优于经典离散PI最优调节器。 - The model of speed loop control system as well as the integral separating PI controlled algorithm was analyzed in detail.
对控制系统建模和积分分离PI算法进行了详细的分析。 - This is a calculated pi source can be used as the primary portal learning.
这是一个圆周率计算源码，可以作为初级入门学习之用。