Case Study Challenge Pen injector design was outside of specification limits for user push force. Several improvements to the design were being contemplated – e.g., lubricant-loaded plastics ROI was indeterminant KDPD Approach Created analytical kinetic model for the pen injector Verified the analytical model with customized test apparatus and a rigorous, systematic, test plan Testing …
FPrin Case Study 1 – Design Capability Challenge: Client was unsure of robustness and fundamental viability of novel wearable pump concept Some initial prototyping and testing yielded mixed results The anticipated multiple cycles of prototype / test / iterate needed to establish viability would be expensive and many relevant test configurations – e.g., extremes of …
Case Study Challenge 3D simulations are time consuming, and expensive to execute, and it is difficult to extract actionable outputs Complex barrel valve with demanding sealing and actuation requirements KDPD Approach Reconsider simulation environment and constraints Utilize 2D simulations and 2D sweep along full-length of perimeter 2D simulation for reduced computational burden and easy iteration …
Case Study The Wright brothers took a systems engineering approach to something that, at least superficially, appeared to be relatively simple – after all birds, insects, and mammals were all doing it – and concluded that they needed to develop a systematic, bottom-up, sub-system based, solution to the challenge. Plenty of their peers – typically …
Case Study Challenge Client was not confident in the robustness of the clinical supplies – specifically motor-gearbox and batteries Because the design was locked, screening was the only viable way of ensuring capable clinical devices Clinical supply team needed a simple, first-principles based, method of characterizing motor-gearbox Our client was concerned about robustness of clinical …
Case Study Challenge Design requirements for the linear actuator were not known Syringe model provided required information to specify a capable linear actuator We were asked to evaluate the robustness of a linear actuator that extruded drug from a syringe. The demands on the linear actuator were poorly understood – i.e. we did not know …
Case Study Challenge System design required detection of tubing internal pressure indirectly across a membrane Inputs and outputs, interfaces and interactions were not well-defined or understood Fundamentals of the pressure to force transformation sensor were not well understood The development team did not have a good understanding of the terms in the transfer function between …
Case Study Challenge Seal design with orthogonal requirements Passes leak specification while allowing relative motion between two plastic parts Seal design space is constrained by previous decision to incorporate O-Ring seal The client’s design requires an airtight seal interface which is also subjected to axial and rotational relative motion. This results in orthogonal requirements with …
Case Study Challenge Complex actuator with multiple springs and several frictional interfaces and latches defining distinct regions of travel Identify a small number of key success criteria to evaluate robustness Determine robustness of a single-use applicator for a wearable sensor prior to committing to expensive (time and $) tooling and large-scale builds and test We …
Case Study Challenge Wearable pump with complex micro gear train Application required very accurate small bolus delivery Identifying drive train elements that will make a significant difference in delivery accuracy Our client’s actuator was not capable of the required accuracy due to kinematic errors propagated through the gear train from the motor to the last …
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