Date of Defense


Date of Graduation



Mechanical and Aerospace Engineering

First Advisor

Alamgir Choudhury

Second Advisor

Bade Shrestha


Hydraulic proportional pressure-control valves (PPCs) are used in many industrial and off-highway applications for control of hydraulic systems. Conventional PPCs operate using open-loop control, but are vulnerable to transient instabilities that interfere with closed-loop control. A PPC valve was designed using Mathcad and SOLIDWORKS with the intent of removing the source of these transient instabilities. This Motor Controlled Direct-Drive Valve (MCDDV) utilizes a brushed DC motor with an eccentric engagement pin, and a closed-loop controller receiving feedback from a pressure transducer and magnetic encoder. A MCDDV prototype was built and tested to evaluate its performance with a closed-loop control system.

Access Setting

Honors Thesis-Restricted