Navigation lock family platform

In the 1930’s many ‘one of a kind’ navigation locks have been built who will reach their end of life in the coming decades. This project focusses on the design of a lock family platform to accommodate the replacement process.

PhD Candidate: ir. Tim Wilschut
Supervisor: L.F.P Etman
Promotors: M. Steinbuch and I.J.F.B Adan
Project Financing: Rijkswaterstaat
Project Period: September 2014 – August 2018

Rijkswaterstaat’s asset managers have observed that the great variety in lock designs has a negative impact on lock reliability, availability (RA) and life cycle costs (LCC). The negative impact is primarily due to the need for local specialized knowledge to operate and maintain these locks and the need for many expensive and unique spare parts. In this project we aim to modularize the lock designs and selectively standardize interfaces between modules and/or designs of modules themselves to increase RA and decrease LCC.  The modules form the product platform as depicted in Figure 2.

The modules are identified by modelling the system architecture using Dependency Structure Matrices (DSM). The DSM is a binary N x N matrix denoting the presence of dependencies among N system elements. Figure 3.a shows an example DSM consisting of 6 elements. An off-diagonal shaded square denotes a dependency between element i and element j. By rearranging the rows and columns of a DSM the underlying structure of a system can be revealed as shown in Figure 3.b. These techniques are used to find an optimal modularization of the lock designs. Further, analysis of the dependency structure provides information on which interfaces and components are candidates for standardization.