Productivity Improvement and Cost Reduction in Hydraulic Cylinders

Enabling Manufacturing Productivity Improvement and Test Wafer Cost Reduction

Today’s wafer fabrication plants must carefully balance the need to increase productivity while simultaneously reducing variable costs. There are a couple of main areas where process control (metrology and inspection) equipment can help minimize variable cost. The first is reducing consumables – minimizing the number of wafers that are processed for non-revenue operations, i.e., test wafers. Se...

Non-linear Improvement of an Intelligent Adaptive Controller Designed for Hydraulic Differential Servo Cylinders

Hydraulic differential, electric servo cylinders are strongly non-linear, coupled multivariable electromechanical tools applicable for driving e.g. manipulators. Besides saturation-type nonlinearities discontinous ones originating from the friction between the cylinder and the piston and the hydrodynamic properties of the flow of the working fluid are present in such systems. Though they have c...

Improvement in Hydraulic Elevators

COST MALMQUIST PRODUCTIVITY INDEX IN SUPPLY CHAIN

The index is excellent by the Malmquist index as extended to productivity measurement. The index developed here is defined in terms of input cost rather than input quantity distance functions in supply chain. Therefore, we propose productivity change is decomposed into overall efficiency and cost technical change. These decompositions provide a clearer situation of the root sources of supply ch...

Fuzzy Differential Equations in Modeling of Hydraulic Differential Servo Cylinders

Hydraulic differential electric servo cylinders are electromechanical tools applicable for driving e.g. manipulators. Actual models are strongly nonlinear, coupled systems of differential equations. In the present paper we propose a new model using fuzzy differential equations under strongly generalized differentiability concept. The key point is a continuous fuzzyfication of the signum functio...