Request for Proposal
Status: RFP is Closed

Excitation Force Identification and Vibration Transmission Model Development of Rotating Machine

Request Number
Due Date
Jun 4
Program Manager

Joint/contract development, licensing, consulting


Phase 1 – Verification of applicability to target system: December 2019
Phase 2 – Technology establishment of experimental identification and prediction: December 2021


Details to be discussed based on proposals


How to  Apply
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RFP was closed on
Jun 2019

RFP Title


Excitation Force Identification and Vibration Transmission Model Development of Rotating Machine
RFP Description

NineSigma, representing a global leading autoparts manufacturer, seeks technologies for identifying and predicting the excitation force of motor-driven rotating machines and technologies for developing vibration transmission models. Specifically, the Client focuses on experimental identification and/or prediction method that are applicable to high frequency ranges (≤5 kHz) and have high accuracy in principle, as well as development of vibration transmission model.


The Client is engaged in the development of technology to identify/predict excitation force of motor-driven rotating machines manufactured in-house and those to analyze vibration transmission, in order to analyze noise inside and outside vehicles. With the spread of hybrid and electric cars in recent years, demand for technology that can accurately identify and predict vibration characteristics of machine parts especially in high frequency ranges (≤5 kHz) has been increased. The Client also promotes technological development themselves. However, given that the development of the concerned analytic technology is promoted in wide variety of industries such as automobile, ship, railway, and aircraft, they has decided to make this RFP to further accelerate their research and development endeavors.

Key Success Criteria

Target systems

  • Motor-driven rotating machine connected to housing as shown on the right:
    • Rotating machine
      • Size: Approx. 20 x 20 x 20 cm3
      • Rotational speed: Below several ten thousand rpm
      • Purpose: For automobile
    • Housing
      • Size: Approx. 20 x 20 x 20 cm3
  • Details of analyzed target:
    • Excitation force generated during the rotation of the machine shaft transfers to housing and cause transmitted force and surface vibration.

Outline of target system

Details of technology requirements

For the above system owned by the Client, the Client seeks: A) technology that can identify experimentally and predict based on analysis and calculation the excitation force, or B) methods for developing vibration transmission models.

A) Identification and prediction of excitation force:

  • Capable of identifying/predicting excitation force of rotating machines
    • Definition of excitation force: Internal force generated during the rotation of machine shaft
      • The Client expects the excitation forces can be concentrated on multiple representative points such as motors, gears, and internal shaft, but is open to others:
  • Proposals of only technology that can identify the excitation force experimentally are also welcome.
  • Not of interest are excitation force simulation technology with which experimental measurement results cannot be verified in principle.


B) Development of vibration transmission model:

  • Capable of developing vibration transmission models of transmission force and/or surface vibration for housing made up of multiple parts
    • Definition of transmission force: Force generated at connector to vehicles.
    • Definition of surface vibration: Vibration on housing surface
  • Not of interest are proposals of only identification technology of transmitted force and surface vibration by experiments.
  • Proposals for the development of simulation models only are welcome.


Common conditions:

  • Frequency range: Preferably supports 0 to 5 kHz
  • Experimental identification accuracy: Preferably within ±10%
  • Calculation prediction accuracy: Preferably within ±10%
  • Applicable to target systems owned by the Client.

It is not necessary for both requirements A) and B) to be met, but either one only is sufficient. Also, there is no need to meet all requirements on frequency range and accuracy at this point; proposals are welcome if there is possibility of meeting them through further development by December 2021.

Possible Approaches

Possible Approaches

The Client expects technologies such as the following approaches or their combination, but is open to others:

  • Finite element analysis
  • Experiment mode analysis
  • Multi-body dynamics analysis
  • Statistical energy analysis
  • Application of vibration analysis method
  • Technology for experimentally measuring excitation force, NVH simulation technology, etc.
Items to be Submitted

 Please include the following items in your proposal:

  • Challenges to which the proposed technology are applied: (A. Identification/prediction of excitation force and/or B. Development of vibration transmission model)
  • Type of proposed technology: (Experimental identification and/or prediction based on simulation)
  • Characteristics, principles, and uniqueness of proposed technology
  • Development stage: Concept stage, technology currently being established, or implemented for practical use
  • Current performance
    • (For A. Identification/prediction of excitation force) Types of applicable vibration sources
    • Applicable frequency ranges
    • Identification/prediction accuracy
    • Analysis environment (e.g., hardware, OS)
  • Specific examples of applications in the past, required time, accuracy
  • Universality of proposed technology (Applicability to target systems owned by the Client)
  • Current challenges and future development plans
  • Demonstration conditions (e.g., costs, deadline, contract conditions)
  • Past results (e.g. research papers, patents)
  • Outline of organization


Notes on Response

Proposal shall have clear points and should not include confidential information. Supplemental files may be submitted in addition to the proposal.


Response evaluation

The client will evaluate all responses with the following criteria.

  • Overall scientific and technical merit
  • Approach to proof of concept or performance
  • Economic potential of concept
  • Realism of the proposed plan (action items, timeline, roles, deliverables, cost estimation)
  • Potential for proprietary position
  • Respondents’ capability and related experiences


Anticipated Project Process

After the submission due date, the client will review all submitted proposals. NineSigma will send the review results to each proposer 6-8 weeks after the due date. The client possibly asks clarifying questions before selecting the most suitable candidates for collaboration. The client will select best candidates through evaluations. During the selection process, the client may execute NDA with selected respondents, seek further information disclosure, and discuss specific development targets or potential opportunities.

The client will execute necessary agreements with the selected respondents and move to the advanced development phase. Specifics of any collaboration will be determined through consultation with the concerned parties.

Preferred Collaboration Types
Area of Interest