Systems engineering process
    1.
    发明申请
    Systems engineering process 失效
    系统工程流程

    公开(公告)号:US20050251432A1

    公开(公告)日:2005-11-10

    申请号:US10839583

    申请日:2004-05-05

    Abstract: A method for implementing a project for a customer. Business requirements are developed for the project and are reviewed for acceptability in accordance with Business Requirements Review (BRR) exit criteria. System requirements are developed for the project and are reviewed for acceptability in accordance with system requirements review (SRR) exit criteria. Component requirements are developed for the project and are reviewed for acceptability in accordance with Preliminary Design Review (PDR) exit criteria. The business requirements are decomposed into the system requirements. The system requirements are decomposed into the component requirements. A Requirements Traceability and Verification Matrix (RTVM) is generated when the business requirements are established. The RTVM is updated throughout the life of the project. The RTVM includes verification information relating to the business requirements, the system requirements, and the component requirements. The RTVM depicts hierarchical relationships between the business requirements, the system requirements, and the component requirements.

    Abstract translation: 为客户实施项目的方法。 为项目开发业务需求,并根据业务需求审查(BRR)退出标准对可接受性进行审查。 为项目开发系统要求,并根据系统要求审查(SRR)退出标准对可接受性进行审查。 为项目开发组件要求,并根据初步设计审查(PDR)退出标准对可接受性进行审查。 业务需求分解为系统要求。 系统要求分解为组件要求。 当业务需求建立时,将生成需求跟踪和验证矩阵(RTVM)。 RTVM在整个项目的整个生命周期中得到更新。 RTVM包括与业务需求,系统要求和组件要求有关的验证信息。 RTVM描述业务需求,系统要求和组件需求之间的层次关系。

    Scanning monochromator with directly driven spectral-dispersion element
    3.
    发明授权
    Scanning monochromator with directly driven spectral-dispersion element 失效
    具有直接驱动光谱色散元件的扫描单色仪

    公开(公告)号:US5625270A

    公开(公告)日:1997-04-29

    申请号:US608765

    申请日:1996-02-29

    Applicant: Bruce Barker

    Inventor: Bruce Barker

    CPC classification number: H02P8/14 G01J3/06

    Abstract: A scanning monochromator system which uses a directly coupled stepper motor to drive a spectral-dispersion element. The spectral-dispersion element is directly coupled to the output shaft of the motor. The movement of the motor is controlled with an electronic circuit that controls the motor winding current. The circuit includes a power driven section, a pulse-width modulator section and a computer section. The power driven section switches electrical current through the motor windings and can produce a variable pulse-width ranging from 0 to 100 percent modulation. The pulse-width modulator section accepts values from the computer section and converts these values into variable pulse-width signals for use by the power driver section. The computer section supplies values to the pulse-width modulator section based upon requirements for the motor movement and position. The required motor position is determined by the type of spectral-dispersion element and the desired wavelength selection of the monochromator.

    Abstract translation: 一种使用直接耦合的步进电机来驱动光谱色散元件的扫描单色仪系统。 光谱色散元件直接耦合到电机的输出轴。 电动机的运动通过控制电动机绕组电流的电子电路来控制。 电路包括功率驱动部分,脉冲宽度调制器部分和计算机部分。 功率驱动部分通过电机绕组切换电流,并可产生0至100%调制范围内的可变脉冲宽度。 脉冲宽度调制器部分接受来自计算机部分的值,并将这些值转换为可变脉冲宽度信号以供功率驱动器部分使用。 计算机部分根据电动机运动和位置的要求向脉宽调制器部分提供值。 所需的电机位置由光谱色散元件的类型和单色仪的期望波长选择决定。

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