Weingarten Realty Investors

About: Weingarten Realty Investors is a based out in . It is known for research contribution in the topics: Mobile robot & Piston. The organization has 892 authors who have published 1284 publications receiving 12726 citations.

Dynamic computerised monitoring and control of pressure injection moulding unit

Abstract: This process monitors and/or controls a pressure injection moulding unit. Desired settings are loaded manually into the computer associated with the machine. Alternatively or in addn., other fixed predetermined input values form the so-called desired operating profile curves and/or desired points with defined positions are input. During an injection cycle process parameters are measured by sensors and supplied to the computer, to construct the so-called actual profile curves. Process monitoring or control is carried out by comparison of actual and desired profiles and/or corresp. points. Also claimed is a measurement system, essentially as described in the procedure.

Ultramaneuverable steering control algorithms for terrain transitions

Abstract: The Center for Self-Organizing and Intelligent Systems has built several vehicles with ultra-maneuverable steering capability. Each drive wheel on the vehicle can be independently set at any angle with respect to the vehicle body and the vehicles can rotate or translate in any direction. The vehicles are expected to operate on a wide range of terrain surfaces and problems arise in effectively controlling changes in wheel steering angles as the vehicle transitions from one extreme running surface to another. Controllers developed for smooth surfaces may not perform well on rough or 'sticky' surfaces and vice versa. The approach presented involves the development of a model of the steering motor with the static and viscous friction of the steering motor load included. The model parameters are then identified through a series of environmental tests using a vehicle wheel assembly and the model thus obtained is used for control law development. Four different robust controllers were developed and evaluated through simulation and vehicle testing. The findings of this development will be presented.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Vibrating-plunger nozzle

Abstract: The invention relates to a nozzle for atomising fuel. The nozzle body (1) has a conical opening. Located in the said opening is a resiliently mounted tappet (2) with a conical head (6). A spring bar (3) which is inserted through a hole in the stem of the tappet (2) presses the tappet head (6) into the conical opening in the nozzle body (1) and closes the said opening in the unpressurised state. As the pressure increases, the tappet (2) is pushed outwards, allowing fuel to flow through the gap between the nozzle body (1) and the tappet head (6). The greater the pump pressure, the larger the gap becomes. The tappet (2) is excited into high-frequency vibrations by the fuel flowing past and these vibrations bring about particularly fine atomisation. The nozzle permits good atomisation and a large control range even with a low pump pressure and a minimum mass flow.