Other Vehicular Assessments
Movement and Monitoring
Aviation
Airplane Designer
Our team uses HBM recording and Jewell MEMS accelerometers to measure acceleration in all three axes. We can measure at many rates up to 300 Hz. We are willing to add other testing.

Aircraft Designer - Parameter Verification
Aircraft designers must consider the flight, safety, and use of aircraft. For passengers issues are different than for cargo, and different from aircraft deployable assets.
- V.A.S.E. Pro offer, and are willing to extend its offerings, testing for accelerations, ppv, and tilt.
- The offered services for designers is to provide independent third party analysis of component parts for accelerations, tilt, peak particle velocity while installed on moving platforms similar to the design being considered, so that designs may use not only supplier assured results but independent results.
- While the results should be the same or similar, V.A.S.E. Pro offers a due diligence component.
Aircraft Maintenance Engineer - Testing for Confirmation
- For example supposing an aircraft is being refit for passenger comfort. In cabin testing of accelerations at seat level would be undertaken.
- Supposing one were refitting a platform to haul fragile cargo, due diligence testing could confirm the levels of accelerations.
New Approach to Due Diligence
- Customers, especially after incidents want proof designers, makers, and operators of airplanes, are worthy of the social trust they invest by stepping on airplanes.
- V.A.S.E. Pro offer a tool for that social trust.
- V.A.S.E Pro consultants offer airplane users data indicating the aircraft designer used independent data and results as part of their due diligence to make sure flight tests of airplanes show the design assumptions were correct.
Ongoing Testing - Airplane Designer, Maintenance Engineer
Aircraft designers must consider the flight, safety, and use of aircraft. For passengers issues are different than for cargo, and different from aircraft deployable assets.
- V.A.S.E. Pro offer, and are willing to extend its offerings, testing for accelerations, ppv, and tilt.
- The offered services for designers is to provide independent third party analysis of component parts for accelerations, tilt, peak particle velocity while installed on moving platforms similar to the design being considered, so that designs may use not only supplier assured results but independent results.
- While the results should be the same or similar, V.A.S.E. Pro offers a due diligence component.
Pre Delivery Test (New, Repurposed, Used)
Acceleration
Data Use - Customer
Are V.A.S.E. Pro equipment part of the airplane
No.
V.A.S.E. Pro offers independent services. Management, Engineers, Designers will have data to allow for third party comparison to hardwired data. V.A.S.E. Pro remain independent of decisions by others, and their equipment must remain independent.
Trains
Pre Design
New trains, coaches, rail, require careful design. Train Coach Designers do not just dream up a spring constant or shock response, the designer uses reasonable values or values from manufacturers. In service responses are derived from past models and actual responses of equipment.
V.A.S.E. Pro offers testing of accelerations of existing trains containing springs, bogies, shocks and the like installed on older trains, run on real or test tracks so models can be calibrated.
Train maintenance - Testing for Reliability
Train Designer
Trucks and Cars
Pre Design
Testing for Reliability
Truck Designer
Ships - Cargo and Passenger
Pre Design
- Equipment such a chairs can be fastened to floors or walls.
- In the pre design stage one can use existing actual ships to measure tilt, peak particle velocity, acceleration and even jerk.
Testing for Passenger Comfort
Before bringing on one’s first passengers, one can pre test the ship for accelerations, tilt, and the like under actual conditions.
One might then implement steps to increase passenger comfort or detect areas with unusual conditions.
V.A.S.E. Pro offers on board testing.
"In Vehicle" Movements
Vehicles and Internal Movements
- If a seat rocks up and down, will passengers notice? Will they be injured? Will they seek other seats?
- If a crate of food is subject to accelerations and vibrations over its bruising or crushing limit (see results by (A.H.A. Eissa et al) what will the losses be and who will pay? Will the customer return?
- Designing a new car, coach, truck, ship, shipping container? What are the external accelerations acting and how are they inside on equipment, parts, electronics?
- Our team measures and records those movements. From those records you can change your seating, your packing, your fleet components.
- On moving vehicles (cars, trucks, trains, ships, airplanes, many movements are repetitive, measured as frequency (number of movements per second) and amplitude (how big movements are).
- Physical bodies also have certain frequencies at which they respond to excitation. A human body parts tends have a resonant frequency of about 2 Hz to over 90Hz (cycles per second), while the human heart has a resonant frequency of about 1 Hz.
Acceleration - What is it
- When an object is going at a given speed slows down or speeds up, that change is speed with time is called acceleration. When an airplane takes off, the force due to acceleration pushes you into the seat.
- Acceleration is measured as the change of speed with time or change in velocity with time.
- Acceleration is the change in speed (for example in kilometers per hour) per second.
- Conventionally acceleration is reported in ft/sec2, m/sec2, or as a fraction of g (the gravitational acceleration at sea level). 1 g = 32.17 ft per second2 1 g = 9.81 m per second2
- If you want the force acting on an object you multiply its mass by the acceleration.
- If forces are high, accelerations or mass may be high. The larger the force on an object (e.g your heart, your body, fruit, electronic parts, etc. ) the more damage that can be done.
- Acceleration matters.
- We experience about 1 g at all times when walking on the surface of the earth, sitting in a plane, or relaxing on a ship.
Acceleration Matters
- Sea Sickness, a lesser example of why accelerations and movements matter. People doing sea sickness overboard?
- If you want the force acting on an object you multiply its mass by the acceleration.
- If forces are high, accelerations or mass may be high. The larger the force on an object (e.g your heart, your body, fruit, electronic parts, etc. ) the more damage that can be done.
- We experience about 1 g at all times when walking on the surface of the earth, sitting in a plane, or relaxing on a ship.
- But in the case of a car starting, or a train car bumping along, or a truck driving on a bumpy road, or a ship rolling to and fro, accelerations can cause issues. including damage, for people many symptoms including nausea, falling, etc.
Measuring Acceleration
- Our team uses HBM recording and Jewell MEMS accelerometers to measure acceleration in all three axes. We can measure at many rates up to 300 Hz.
What does an Acceleration Curve look like?
- So now you engaged a team to measure acceleration of your passenger seat.
- What does the curve look like and what can it tell you?
- Above is a small part of the acceleration versus time curve for the old train coach.
- One sees the accelerations are about 0.02 g to 0.15 g, that the acceleration curve is full of noise, and that the train jerks.
- Designers will use the information to design suspensions, fixes, and seat level changes to enhance passenger comfort.
Acceleration and Human Environments
- Here are some typical vibrations and acceleration numbers.
Where | G |
---|---|
Sea Level | 1 |
Airline at 35000 feet | 0.99 |
Car taking off | 0.3 |
Sprinter | 0.3 |