Monitoring a degrading system
    2.
    发明申请
    Monitoring a degrading system 有权
    监控降级系统

    公开(公告)号:US20080201104A1

    公开(公告)日:2008-08-21

    申请号:US12076852

    申请日:2008-03-24

    IPC分类号: G06F17/18 G06F15/00

    摘要: The present disclosure is concerned with the identification of fault origins of slowly degrading systems such as industrial gas turbines. Following the initial input of some parameter values, exemplary procedure comprises a number of steps which are repeated periodically during the operation of the gas turbine. First, for each potential fault such as e.g. a contamination of compressor blades, erosion of turbine blades or corrosion of machine parts, a pre-symptom fault probability, characteristic of the specific gas turbine considered, and a symptom-conditional fault probability are calculated. In a second step, on-line data from the monitoring devices are loaded in order to update information about symptoms such as e.g. reductions in polytropic efficiency and in flow capacity, changes in vibration spectrum, or other machine condition indicators, and a post-symptom fault probability is calculated. In a third step, the calculated fault probabilities are displayed and transmitted to a planning system for scheduling of gas turbine operation or maintenance actions.

    摘要翻译: 本公开涉及对诸如工业燃气轮机之类的缓慢降解系统的故障起源的识别。 在一些参数值的初始输入之后,示例性过程包括在燃气轮机的操作期间周期性重复的多个步骤。 首先,对于每个潜在故障,例如 计算压缩机叶片的污染,涡轮机叶片的腐蚀或机器部件的腐蚀,预应力故障概率,所考虑的特定燃气轮机的特性以及症状条件故障概率。 在第二步中,加载来自监视设备的在线数据,以便更新关于症状的信息,例如, 计算多变性效率和流量减少,振动频谱变化或其他机器状况指标,以及症状后故障概率。 在第三步中,计算出的故障概率被显示并传送到用于调度燃气轮机操作或维护动作的规划系统。

    Estimating health parameters or symptoms of a degrading system
    3.
    发明授权
    Estimating health parameters or symptoms of a degrading system 有权
    评估降解系统的健康参数或症状

    公开(公告)号:US08050843B2

    公开(公告)日:2011-11-01

    申请号:US12987654

    申请日:2011-01-10

    IPC分类号: G06F19/00

    CPC分类号: G05B23/0254

    摘要: The present invention is concerned with the estimation of health parameters p(k) representing symptoms of a slowly degrading system, in particular industrial gas turbines. According to the invention, an estimation of a true health or independent parameter vector at time step k uses the estimation of the true health or parameter vector at a previous time step k−1 as a starting value for the production of a predicted health parameter vector at time step k. Based on the latter and a set of measured values of input variables of an extended model of the system, a prediction of output variables of the model is produced. This predicted model output is compared with measured values of the output variables to yield an error. From this error, a health parameter estimator in turn produces a health parameter estimate as a revision of the predicted health parameters. Preferably, the estimation of a true health or independent parameter vector at time step k includes a generalised process noise representing stochastic uncertainty and/or a-priori knowledge of an evolution of the health parameters.

    摘要翻译: 本发明涉及代表慢性降解系统特别是工业燃气轮机的症状的健康参数p(k)的估计。 根据本发明,在时间步骤k对真健康或独立参数矢量的估计使用在先前时间步骤k-1处的真实健康或参数矢量的估计作为生成预测健康参数矢量的起始值 在时间步骤k。 基于后者和系统的扩展模型的输入变量的一组测量值,产生了模型的输出变量的预测。 将该预测模型输出与输出变量的测量值进行比较以产生误差。 从该错误中,健康参数估计器又产生健康参数估计值作为预测健康参数的修订。 优选地,在时间步骤k对真实健康或独立参数向量的估计包括表示随机不确定性的概括过程噪声和/或健康参数演化的先验知识。

    Method and system for monitoring process states of an internal combustion engine
    4.
    发明授权
    Method and system for monitoring process states of an internal combustion engine 失效
    用于监测内燃机过程状态的方法和系统

    公开(公告)号:US08280647B2

    公开(公告)日:2012-10-02

    申请号:US12480411

    申请日:2009-06-08

    IPC分类号: G01B3/00

    摘要: For monitoring (unmeasured) process states of a rotating machine having a combustion chamber (e.g. a gas turbine), compositions of educts entering the combustion chamber are measured. Based on the compositions of the educts, the composition of the product produced by the combustion chamber can be determined. Moreover, the mechanical power (Pmech) generated by the rotating machine can be determined. Based on the mechanical power (Pmech), the composition of the educts and product, and stoichiometric relationships of educts and product, the values of process states, such as the air mass flow (wa) through the compressor leading into the combustion chamber and/or the gas mass flow (wg), the composition and/or the temperature (T3) of exhaust gas exiting the combustion chamber can be determined. Based on precise measurements of the educt (e.g. the composition of air and fuel in the combustion process), the product (i.e. the composition of the exhaust gas and its temperature) is derived and, without the need of an iterative or recursive method, the turbine inlet temperature (T3) can be monitored and controlled.

    摘要翻译: 对于具有燃烧室(例如,燃气轮机)的旋转机器的监测(未测量)过程状态,测量进入燃烧室的离析物的组成。 基于离析物的组成,可以确定由燃烧室产生的产物的组成。 此外,可以确定由旋转机器产生的机械功率(Pmech)。 基于机械功率(Pmech),离析物和产物的组成以及离子和产物的化学计量关系,通过经过通向燃烧室的压缩机的空气质量流量(wa)和/ 或气体质量流量(wg),可以确定离开燃烧室的废气的组成和/或温度(T3)。 基于对流出物的精确测量(例如燃烧过程中的空气和燃料的组成),导出产物(即废气的组成及其温度),并且不需要迭代或递归方法 涡轮进口温度(T3)可以被监测和控制。

    ESTIMATING HEALTH PARAMETERS OR SYMPTOMS OF A DEGRADING SYSTEM
    5.
    发明申请
    ESTIMATING HEALTH PARAMETERS OR SYMPTOMS OF A DEGRADING SYSTEM 有权
    评估降解系统的健康参数或症状

    公开(公告)号:US20110160980A1

    公开(公告)日:2011-06-30

    申请号:US12987654

    申请日:2011-01-10

    IPC分类号: G01M15/14 G01M15/00

    CPC分类号: G05B23/0254

    摘要: The present invention is concerned with the estimation of health parameters p(k) representing symptoms of a slowly degrading system, in particular industrial gas turbines. According to the invention, an estimation of a true health or independent parameter vector at time step k uses the estimation of the true health or parameter vector at a previous time step k−1 as a starting value for the production of a predicted health parameter vector at time step k. Based on the latter and a set of measured values of input variables of an extended model of the system, a prediction of output variables of the model is produced. This predicted model output is compared with measured values of the output variables to yield an error. From this error, a health parameter estimator in turn produces a health parameter estimate as a revision of the predicted health parameters. Preferably, the estimation of a true health or independent parameter vector at time step k includes a generalised process noise representing stochastic uncertainty and/or a-priori knowledge of an evolution of the health parameters.

    摘要翻译: 本发明涉及代表慢性降解系统特别是工业燃气轮机的症状的健康参数p(k)的估计。 根据本发明,在时间步骤k对真健康或独立参数矢量的估计使用在先前时间步骤k-1处的真实健康或参数矢量的估计作为生成预测健康参数矢量的起始值 在时间步骤k。 基于后者和系统的扩展模型的输入变量的一组测量值,产生了模型的输出变量的预测。 将该预测模型输出与输出变量的测量值进行比较以产生误差。 从该错误中,健康参数估计器又产生健康参数估计值作为预测健康参数的修订。 优选地,在时间步骤k对真实健康或独立参数向量的估计包括表示随机不确定性的概括过程噪声和/或健康参数演化的先验知识。

    Estimating health parameters or symptoms of a degrading system
    7.
    发明授权
    Estimating health parameters or symptoms of a degrading system 有权
    评估降解系统的健康参数或症状

    公开(公告)号:US07869928B2

    公开(公告)日:2011-01-11

    申请号:US11386738

    申请日:2006-03-23

    IPC分类号: G06F19/00

    CPC分类号: G05B23/0254

    摘要: The present invention is concerned with the estimation of health parameters p(k) representing symptoms of a slowly degrading system, in particular industrial gas turbines. According to the invention, an estimation of a true health or independent parameter vector at time step k uses the estimation of the true health or parameter vector at a previous time step k−1 as a starting value for the production of a predicted health parameter vector at time step k. Based on the latter and a set of measured values of input variables of an extended model of the system, a prediction of output variables of the model is produced. This predicted model output is compared with measured values of the output variables to yield an error. From this error, a health parameter estimator in turn produces a health parameter estimate as a revision of the predicted health parameters. Preferably, the estimation of a true health or independent parameter vector at time step k includes a generalized process noise representing stochastic uncertainty and/or a-priori knowledge of an evolution of the health parameters.

    摘要翻译: 本发明涉及代表慢性降解系统特别是工业燃气轮机的症状的健康参数p(k)的估计。 根据本发明,在时间步骤k对真健康或独立参数矢量的估计使用在先前时间步骤k-1处的真实健康或参数矢量的估计作为生成预测健康参数矢量的起始值 在时间步骤k。 基于后者和系统的扩展模型的输入变量的一组测量值,产生了模型的输出变量的预测。 将该预测模型输出与输出变量的测量值进行比较以产生误差。 从该错误中,健康参数估计器又产生健康参数估计值作为预测健康参数的修订。 优选地,在时间步骤k对真实健康或独立参数向量的估计包括表示随机不确定性的概括过程噪声和/或健康参数演化的先验知识。

    Estimating health parameters or symptoms of a degrading system
    8.
    发明申请
    Estimating health parameters or symptoms of a degrading system 有权
    评估降解系统的健康参数或症状

    公开(公告)号:US20060217870A1

    公开(公告)日:2006-09-28

    申请号:US11386738

    申请日:2006-03-23

    IPC分类号: G06F19/00

    CPC分类号: G05B23/0254

    摘要: The present invention is concerned with the estimation of health parameters p(k) representing symptoms of a slowly degrading system, in particular industrial gas turbines. According to the invention, an estimation of a true health or independent parameter vector at time step k uses the estimation of the true health or parameter vector at a previous time step k−1 as a starting value for the production of a predicted health parameter vector at time step k. Based on the latter and a set of measured values of input variables of an extended model of the system, a prediction of output variables of the model is produced. This predicted model output is compared with measured values of the output variables to yield an error. From this error, a health parameter estimator in turn produces a health parameter estimate as a revision of the predicted health parameters. Preferably, the estimation of a true health or independent parameter vector at time step k includes a generalised process noise representing stochastic uncertainty and/or a-priori knowledge of an evolution of the health parameters.

    摘要翻译: 本发明涉及代表慢性降解系统特别是工业燃气轮机的症状的健康参数p(k)的估计。 根据本发明,在时间步骤k对真健康或独立参数矢量的估计使用在先前时间步骤k-1处的真实健康或参数矢量的估计作为生成预测健康参数矢量的起始值 在时间步骤k。 基于后者和系统的扩展模型的输入变量的一组测量值,产生了模型的输出变量的预测。 将该预测模型输出与输出变量的测量值进行比较以产生误差。 从该错误中,健康参数估计器又产生健康参数估计值作为预测健康参数的修订。 优选地,在时间步骤k对真实健康或独立参数向量的估计包括表示随机不确定性的概括过程噪声和/或健康参数演化的先验知识。

    Estimating initial states of a system model for controlling an industrial process
    9.
    发明授权
    Estimating initial states of a system model for controlling an industrial process 有权
    估算用于控制工业过程的系统模型的初始状态

    公开(公告)号:US09285787B2

    公开(公告)日:2016-03-15

    申请号:US13334596

    申请日:2011-12-22

    摘要: A model-based control of an industrial process using a merged MLD system model is provided for the estimation and subsequent control of the process. An optimization of an objective function is performed. The objective function includes a difference between an observed quantity and an output variable of a Mixed Logical Dynamic (MLD) system model of the process. The optimization is performed as a function of state variables of the MLD system model, over a number of time steps in the past, and subject to constraints defined by the MLD system model's dynamics. The optimizing values of the state variables are retained as estimated initial states for subsequent control of the process in a model-based manner including the same MLD system model. The single MLD system model is a combination or merger of individual MLD subsystem models representing the sub-processes of the process, and may be elaborated during a customization step.

    摘要翻译: 提供了使用合并的MLD系统模型的工业过程的基于模型的控制,用于估计和后续的过程控制。 执行目标函数的优化。 目标函数包括过程的混合逻辑动态(MLD)系统模型的观测量和输出变量之间的差异。 MLD系统模型的状态变量的优化在过去的许多时间步长中进行,并受到MLD系统模型动力学约束的限制。 状态变量的优化值作为估计的初始状态保留,用于以包含相同的MLD系统模型的基于模型的方式随后控制过程。 单个MLD系统模型是表示过程的子过程的单个MLD子系统模型的组合或合并,并且可以在定制步骤中详细描述。

    ESTIMATING INITIAL STATES OF A SYSTEM MODEL FOR CONTROLLING AN INDUSTRIAL PROCESS
    10.
    发明申请
    ESTIMATING INITIAL STATES OF A SYSTEM MODEL FOR CONTROLLING AN INDUSTRIAL PROCESS 有权
    估算控制工业过程的系统模型的初始状态

    公开(公告)号:US20120150507A1

    公开(公告)日:2012-06-14

    申请号:US13334596

    申请日:2011-12-22

    IPC分类号: G06F17/10

    摘要: A model-based control of an industrial process using a merged MLD system model is provided for the estimation and subsequent control of the process. An optimization of an objective function is performed. The objective function includes a difference between an observed quantity and an output variable of a Mixed Logical Dynamic (MLD) system model of the process. The optimization is performed as a function of state variables of the MLD system model, over a number of time steps in the past, and subject to constraints defined by the MLD system model's dynamics. The optimizing values of the state variables are retained as estimated initial states for subsequent control of the process in a model-based manner including the same MLD system model. The single MLD system model is a combination or merger of individual MLD subsystem models representing the sub-processes of the process, and may be elaborated during a customization step.

    摘要翻译: 提供了使用合并的MLD系统模型的工业过程的基于模型的控制,用于估计和后续的过程控制。 执行目标函数的优化。 目标函数包括过程的混合逻辑动态(MLD)系统模型的观测量和输出变量之间的差异。 MLD系统模型的状态变量的优化在过去的许多时间步长中进行,并受到MLD系统模型动力学约束的限制。 状态变量的优化值作为估计的初始状态保留,用于以包含相同的MLD系统模型的基于模型的方式随后控制过程。 单个MLD系统模型是表示过程的子过程的单个MLD子系统模型的组合或合并,并且可以在定制步骤中详细描述。