招标变更公告日期：***.******.***招标编号：****-****SITCM***截止时间：***.******.*** **:**招标变更公告内容：中文：招标文件原内容：招标文件第二册第八章技术规格：****.******.***总体要求为充分保证设备的兼容性，便于操作，投标设备的所有硬件和软件平台均来自同一供应商，而且所有软件功能（除扩展功能外）必须在同一软件平台中实现。***.******.*** 数采前端主要规格要求：*）通道要求*C. 系统AC、ICP耦合分析频率范围：*.**Hz-***KHz 投标产品的此项功能要求提供航天***所计量检定证书。*D. 数采前端和主控计算机之间传输速度：优于**M采样点/秒投标产品的此项功能要求提供航天***所计量检定证书。*E. 无杂波本底噪声：优于***dB投标产品的此项功能要求投标厂家给出投标模块的出厂检定证明以及检定方法，以备用户必要时的复检查证。***.******.*** 数采前端主要规格要求：**）A/D转换C. 并行采样频率范围 ≥***KHz；投标产品的此项功能要求提供航天***所计量检定证书。***.******.*** 振动数据采集分析软件：*）模态分析*B. 基于实际载荷环境和实际装配条件下的结构加速度响应的工作模态分析方法：随机子空间法Stochastic Subspace Method，以及最小二乘复频域LSCF方法。***.******.*** 振动数据采集分析软件：***) 扩展功能G. 以上所有扩展功能必须基于同一家原厂商的同一软件平台。***.******.*** 振动数据采集分析软件：**) 传递路径分析A. 能将多个部分相关的源分解开来，然后对各个独立激励源所引起目标点的振动分别进行各个传递路径的贡献量分析。*B. 对于载荷的确定，软件需要提供多种经典识别方法，包括使用力锤的直接法、悬置刚度法、单参考向量求逆、矩阵求逆等方法。*C. 具有工况传递路径分析功能，即直接通过工况下的数据进行载荷识别。如直接使用工况下的悬置上下的振动信号，计算分析得到载荷力（N）。D. 分析结果可以显示出不同工况下，各个传递路径的载荷数据、载荷点到目标点的传递函数数据，以及该途径的贡献量数据。E. 软件应具有数据完整性自动检查功能、逆矩阵条件数检查功能。*F. 对于最后得到的传递路径贡献量分析结果，能够以四维图、饼状图、柱状序列图、向量合成图等多种方式显示。可以交互选择各个工况，对主要阶次/频率成分进行贡献量分析。投标文件递交截止时间及开标时间：****年**月*日上午**:**（北京时间）投标文件递交地点及开标地点：北京丰台云岗南宫宾馆贵宾*。变更后：****.******.***总体要求为充分保证设备的兼容性，便于操作，投标设备的所有硬件和软件平台应具有良好的系统集成性和扩展性。***.******.*** 数采前端主要规格要求：*）通道要求*C. 系统AC、ICP耦合分析频率范围：*.**Hz-***KHz 投标产品的此项功能要求提供相应资质的计量检定证书。*D. 数采前端和主控计算机之间传输速度：优于**M采样点/秒投标产品的此项功能要求提供相应资质的计量检定证书。*E. 无杂波本底噪声：优于***.******.*** 数采前端主要规格要求：**）A/D转换C. 并行采样频率范围 ≥***KHz；投标产品的此项功能要求提供相应资质的计量检定证书。***.******.*** 振动数据采集分析软件：*）模态分析*B.基于实际载荷环境和实际装配条件下的结构加速度响应的工作模态分析方法：最小二乘复频域法LSCF方法等。***.******.*** ***) G项删除。***.******.*** 振动数据采集分析软件：**) 传递路径分析A. 能将多个部分相关的源分解开来，然后对各个独立激励源所引起目标点的振动分别进行各个传递路径的贡献量分析。B. 对于载荷的确定，软件需要提供多种经典识别方法，包括使用力锤的直接法、悬置刚度法、单参考向量求逆、矩阵求逆等方法。C. 具有工况传递路径分析功能，即直接通过工况下的数据进行载荷识别。如直接使用工况下的悬置上下的振动信号，计算分析得到载荷力（N）。D. 分析结果可以显示出不同工况下，各个传递路径的载荷数据、载荷点到目标点的传递函数数据，以及该途径的贡献量数据。E. 软件应具有数据完整性自动检查功能、逆矩阵条件数检查功能。F. 对于最后得到的传递路径贡献量分析结果，能够以四维图、饼状图、柱状序列图、向量合成图等多种方式显示。可以交互选择各个工况，对主要阶次/频率成分进行贡献量分析。投标文件递交截止时间及开标时间：****年**月*日上午**:**（北京时间）投标文件递交地点及开标地点：北京丰台云岗南宫宾馆贵宾*。英文：Bidding document before amendment:Section * Technical Specifications in Volume two of bidding documents:****.******.*** General requirementsIn order to fully guarantee compatibility of equipment and facilitate operation, all hardware and software platforms of the equipment submitted in the bid shall be from the same supplier and all software functions (except extension function) must be realized in the same software ***.******.***.* Main specification requirements for data acquisition frontend*) Channel requirements*C. Range of system AC and ICP coupling analysis frequency: *.**Hz-***KHz For this function of the product submitted in the bid, the metrological verification certificate of No.*** Institute of the First Academy of China Aerospace Science and Technology Corporation shall be provided. *D. Transmission rate between data acquisition frontend and main control computer: superior to **M sampling point/sFor this function of the product submitted in the bid, the metrological verification certificate of No.*** Institute of the First Academy of China Aerospace Science and Technology Corporation shall be provided. *E. Clutter-free background noise: superior to ***dBFor this function of the product submitted in the bid, the bidding manufacturer shall provide factory verification certificate and verification method of bidding module for rechecking the certificate by users when ***.******.***.* Main specification requirements for data acquisition frontend**) A/D conversionC. Range of parallel sampling frequency: ≥***KHz; For this function of the product submitted in the bid, the metrological verification certificate of No.*** Institute of the First Academy of China Aerospace Science and Technology Corporation shall be ***.******.***.* Vibration data acquisition and analysis software*）Modal analysis*B. Working modal analysis method of structural acceleration response based on actual load environment and actual assembly condition: Stochastic Subspace Method and LSCF domain ***.******.***.* Vibration data acquisition and analysis software***) Extension functionG. All the above extension functions must be based on the same software platform of the same original ***.******.***.* Vibration data acquisition and analysis software**) Transfer path analysis A. Multi-part related source can be decomposed and then the contribution of ach transfer path is analyzed respectively to the vibration of target point arising from each independent excitation source. *B. For determination of load, software shall provide multiple Classical identification methods, including direct method by use of hammer, Suspension stiffness method, single reference vector inversion method and matrix inversion method, etc. *C. Have the operating condition transfer path analysis function, i.e. identify load directly by the data under operating condition, e.g. directly use suspension up and down vibration signals under operating condition, to calculate, analyze and get load force (N). D. Analysis data can display load data of each transfer path under different operating condition, and transfer function data from load point to target point, and contribution data of the path. E. Software shall have automatic data integrity check function and inverse matrix condition number check function. *F. Final analysis result of transfer path contribution can be displayed in the form of four-dimensional graph, pie graph, columnar sequence diagram and vector composite diagram, etc. Operating conditions can be selected interactively; contribution analysis can be made to principal order/frequency components.Deadline of bid submission: **:** a.m. (Beijing time) on Dec. *rd, ****.Address of bid submission and bid opening: *rd Meeting Room, Nangong Hotel, Yungang, Fengtai District, Beijing, ***.******.*** document after amendment:****.******.*** General requirementsIn order to fully guarantee compatibility of equipment and facilitate operation, all hardware and software platforms of the equipment submitted in the bid shall have good systems integration performance and expansibility ***.******.***.* Main specification requirements for data acquisition frontend*) Channel requirements*C. Range of system AC and ICP coupling analysis frequency: *.**Hz-***KHz For this function of the product submitted in the bid, the qualified metrological verification certificate shall be provided. *D. Transmission rate between data acquisition frontend and main control computer: superior to **M sampling point/sFor this function of the product submitted in the bid, the qualified metrological verification certificate shall be provided. *E. Clutter-free background noise: superior to ***.******.***.* Main specification requirements for data acquisition frontend**) A/D conversionFor this function of the product submitted in the bid, the qualified metrological verification certificate shall be ***.******.***.* Vibration data acquisition and analysis software*）Modal analysis*B. Working modal analysis method of structural acceleration response based on actual load environment and actual assembly condition: LSCF domain method.Delete ***.******.*** ***) ***.******.*** Vibration data acquisition and analysis software**) Transfer path analysis A. Multi-part related source can be decomposed and then the contribution of ach transfer path is analyzed respectively to the vibration of target point arising from each independent excitation source. B. For determination of load, software shall provide multiple Classical identification methods, including direct method by use of hammer, Suspension stiffness method, single reference vector inversion method and matrix inversion method, etc. C. Have the operating condition transfer path analysis function, i.e. identify load directly by the data under operating condition, e.g. directly use suspension up and down vibration signals under operating condition, to calculate, analyze and get load force (N). D. Analysis data can display load data of each transfer path under different operating condition, and transfer function data from load point to target point, and contribution data of the path. E. Software shall have automatic data integrity check function and inverse matrix condition number check function. F. Final analysis result of transfer path contribution can be displayed in the form of four-dimensional graph, pie graph, columnar sequence diagram and vector composite diagram, etc. Operating conditions can be selected interactively; contribution analysis can be made to principal order/frequency components.Deadline of bid submission: **:** a.m. (Beijing time) on Dec. *th, ****.Address of bid submission and bid opening: *rd Meeting Room, Nangong Hotel, Yungang, Fengtai District, Beijing, ***.******.***