Under The Moon——6、Spaceship to the Moon

在一次紧急撤离行动中,一群人在指挥官阿达伊的帮助下乘坐小型飞机逃出监狱,并通过一艘等待的宇宙飞船离开了即将被大火吞噬的地球。他们前往月球殖民地,那里将成为人类新的家园。

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And so they waited.And waited.Rilla slept in her chair.Kiah and Seru talked quietly.Seru's brother came and went.Most of the prison guards ran away with teh prisoners.Seven or eight people-some prisoners and some guards-didn't want to run away,so they came into the room ad waited,too.
Ten o'clock came,then eleven o'clock.It was very quiet.Seru walked up and down the room.Kiah sat next to Rilla.Seru's bother came into the room again.
'It's after midnight,'he said.
Just then,they heard the noise of a plane.Kiah stood up.'Come on,'he said.'Let's get out of the building.'
Quietly,they left the building.It was a dark,hot night.There were no guards in front of the prison,so they went to the gate and waited there.Suddenly,they saw the plane.It was a little plane,and it was going to come down on the road in front of the prison!
Rilla took Kiah's hand.'You were right,'she said.'I'm sorry.'
Kiah smiled.He began to feel happy.'That's all right.I understand.I know Adai very well,and you don't.'
The plane stopped and someone opened the door.Kiah ran across to the plane.
'How many can you take?'he called.'There are twelve of us.'
'That's all right,'someone said.'Quickly,the spaceship is waiting.'
The twelve people got into the little plane,and the plane began to move.Rilla looked at the captain of the plane.He was tall,with brown hair.He looked nice.Was this the famous Commander Adai?
'Where is the spaceship?'Kiah asked.
'At the old airport,'the man said.'One of the fires is moving very quickly across the new forest.It's going to arrive at the west of Kisangani before tomorrwo,I think.But the old airport is OK.'then the man looked at Kiah and smiled warmly.'My borther,'he said.'My little brother,in prison 888!'
'Your brother?Commander Adai?'Rilla asked.'But you didn't tell me that!'
Kiah smiled.'Nobody knew,'he said.'But now-it doesn't matter now.Everyone can know.'
The little plane came down at the old airport,south of the town.
'Let's be careful,'Adai said.'We don't want someone to shoot us before we leave.'
The spaceship was dark.Quickly,everyone jumped down from the plane and ran across to the spaceship.Soon,the spaceship left Earth,and everyone looked down at the burning planet.They saw the dark smoke over Africa,and here and there,throuht the smoke,the red,angry fires.
'The fires are destorying the forest very quickly,'seru said.
Adai put his hand on Kiah's arm.'I'm sorry about Zadak,'he said.
'I wanted him to wait,'Kiah said.'I wanted him to talk to you.'
Adai's face was red.'He didn't want me to die,'he said quietly.'He was a good man.And now he's dead.'
'And Gog is going to Mars,'seru said.
'Mars?He's crazy!Mars isn't ready for people,'Adai said.
'But Gog wants to go,and so he's going,'seru said.'Tell us about the Moon colony.That isn't ready:you need more money.'
'No,I don't,'Adai said.'The Monn colony is ready.I asked for more money because of Zadak:I wanted to give him money for rain.But Gog didn't listen;he wanted all Earth's money for the spaceship to Mars.'
'I don't want to leave Earth,'Rilla said sadly.She felt tired and afraid.
Adai smiled warmly at Rilla.'Nobody wants to leave Earth,'he said.'But under the Moon is the best home for us now.Wait and see.The Moon colony is a beautiful,wonderful country,with rivers and rain,forests and flowers,buildings-and the first town.You can visit Earth again soon,and bring more people to the Moon colony.We all want to help Earth,because it's our first home.I know that.At the same time,you are going to be happy under the Moon.'
Suddenly,someone cried:'Look at the Moon!'
And through the window of the spaceship they saw the Moon before them,cold,white and beautiful;and under the Moon,there was the Moon colony!
基于C2000 DSP的电力电子、电机驱动和数字滤波器的仿真模型构建及其C代码实现方法。首先,在MATLAB/Simulink环境中创建电力电子系统的仿真模型,如三相逆变器,重点讨论了PWM生成模块中死区时间的设置及其对输出波形的影响。接着,深入探讨了C2000 DSP内部各关键模块(如ADC、DAC、PWM定时器)的具体配置步骤,特别是EPWM模块采用上下计数模式以确保对称波形的生成。此外,还讲解了数字滤波器的设计流程,从MATLAB中的参数设定到最终转换为适用于嵌入式系统的高效C代码。文中强调了硬件在环(HIL)和支持快速原型设计(RCP)的重要性,并分享了一些实际项目中常见的陷阱及解决方案,如PCB布局不当导致的ADC采样异常等问题。最后,针对中断服务程序(ISR)提出了优化建议,避免因ISR执行时间过长而引起的系统不稳定现象。 适合人群:从事电力电子、电机控制系统开发的技术人员,尤其是那些希望深入了解C2000 DSP应用细节的研发工程师。 使用场景及目标:①掌握利用MATLAB/Simulink进行电力电子设备仿真的技巧;②学会正确配置C2000 DSP的各项外设资源;③能够独立完成从理论设计到实际产品落地全过程中的各个环节,包括但不限于数字滤波器设计、PWM信号生成、ADC采样同步等。 其他说明:文中提供了大量实用的代码片段和技术提示,帮助读者更好地理解和实践相关知识点。同时,也提到了一些常见错误案例,有助于开发者规避潜在风险。
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