This life sciences laboratory instrument repeatedly simulates the performance of auto-injectors to characterize the response of their associated drug containers. Cooper Perkins developed a measurement device capable of exerting a variable but controlled force on a variety of drug containers. The force is a function of position, velocity, acceleration and must respond in real time to the behavior of the test specimen. The central challenge was in developing a rapidly adapting set of nested control loops to prescribe force as a function of position, velocity, and acceleration. Cooper Perkins developed the technology, designed the instrument, wrote the software interface and data collection code, and finally built and delivered the device to rave reviews (okay, standing ovation).