Accuracy Versus Resolution In Analyzing System Errors:distinguishing Between Accuracy And Resolution Can Be Misinterpreted In Determining System Needs

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Accuracy Versus Resolution In Analyzing System Errors:distinguishing Between Accuracy And Resolution Can Be Misinterpreted In Determining System Needs

机译：分析系统错误时的精度与分辨率：在确定系统需求时可能会误解精度与分辨率之间的区别

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To ensure a system's accuracy meets required needs, system error budgets must be an integral part of system design. Considerations should include necessary levels of accuracy for system elements, as well as such issues as compatibility between software algorithm calculations and measurement accuracy - meaning resolution must also be taken into account. Accuracy is the degree of absolute correctness of a measurement device; resolution is the smallest number that the device can display or record. In the following examples, the digital device quantizing error (±1 bit minimum) in the least significant digit is assumed to be zero. Remember that a measurement device with a specified accuracy of ±0.015% actually gives an output between 0.99985 and 1.00015 times the actual true value.

机译：为确保系统的准确性满足要求，系统错误预算必须是系统设计的组成部分。考虑因素应包括系统元素的必要精度水平，以及软件算法计算和测量精度之间的兼容性等问题-这意味着还必须考虑分辨率。准确度是测量设备的绝对正确程度；分辨率是设备可以显示或记录的最小数字。在以下示例中，最低有效位的数字设备量化误差（最小±1位）假定为零。请记住，指定精度为±0.015％的测量设备实际输出的值是实际真实值的0.99985至1.00015倍。

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《NASA Tech Briefs》 |2008年第12期|p.50-51|共2页
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Accuracy Versus Resolution In Analyzing System Errors:distinguishing Between Accuracy And Resolution Can Be Misinterpreted In Determining System Needs

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