搜索 - 科创网

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摘要：首先，介绍了两种发动机的基本原理和工作流程；然后，从推力、重量、可靠性、灵活性和成本等方面比较了它们的优缺点；最后，对未来的发展趋势进行了展望。

摘要：本文简单的探讨了固体火箭发动机拉法尔喷管的工作状态与一般设计方法，并通过了一些实例研究了其对性能提升的情况，结果表明对于一般的低压发动机使用拉法尔喷管对推力的提升较小，对于高压发动机而言则很有必要。

内容：首先解释应变片的工作原理‎使用应变片组成桥式称重传感器简化数学模型：Vout=Vexc*(F+offset)*scale通常，推力计电路会采用Vexc同时作为ADC采集基准。,推力F=(Vout/Vexc)/scale-offset=(ADC/Max)/scale-offset推力计校准方法：offset和scale可以通过实测获得。,在称重传感器上面放置一个已知质量的砝码，或者施加一个已知的推力，ADC读数的变化量除以砝码所受重力，即为scale的数值。,例如：读数变化量：980655 砝码：1kg 砝码所受重力：9.80655N scale=980655/kg=100000/N测量系统静止，没有受到推力时，F=offset。,图解法校准：X轴为施加推力，Y轴为ADC读数。

约找到 3814 条结果，耗时 0.318 秒

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