A Hardware-in-the-Loop Transient Diesel Engine Test System for Control and Diagnostic Development

2001 ◽  
Author(s):  
C. Jason Tartt ◽  
John J. Moskwa
Keyword(s):  
Diesel Engine ◽  
State Of The Art ◽  
Catalytic Converter ◽  
Test System ◽  
Hardware In The Loop ◽  
Powertrain Control ◽  
University Of Wisconsin ◽  
Control Research ◽  
Transient Emissions ◽  
The University

Abstract This paper describes the design and capabilities of a state-of-the-art diesel engine transient test system, which has been developed and built in the Powertrain Control Research Laboratory (PCRL) at the University of Wisconsin - Madison. The system includes a hydrostatic transient dynamometer capable of approximately 300 Hz actuation bandwidth, which is integrated with a dynamic vehicle drivetrain model that runs in real time. This hardware-in-the-loop (HIL) system simulates dynamic torque loading on the engine while performing an FTP, NEDC, J10.15, or any other drive cycles. The dynamometer system is complemented with transient emissions instrumentation to evaluate the state and composition of engine feed gases, and pre and post catalytic converter gases. Included in this paper are details of the design philosophy, why a hydrostatic design was used, specifics on the hardware of the system, as well as experimental data from the system.

Control of the Intake Air Dynamics on a Single-Cylinder Engine, to Replicate Multi-Cylinder Engine Dynamics

2015 ◽  
Author(s):  
John J. Moskwa ◽  
Mark B. Murphy
Keyword(s):  
Heat Transfer ◽  
Gas Dynamics ◽  
Test System ◽  
Charge Motion ◽  
Single Cylinder ◽  
Powertrain Control ◽  
University Of Wisconsin ◽  
Single Cylinder Engine ◽  
Control Research ◽  
Significant Step

Single-cylinder test engines are used extensively in engine research, and sparingly in engine development, as an inexpensive way to test or evaluate new concepts or to understand in-cylinder motion or combustion. They also allow good access to the cylinder for instrumentation, however, these single-cylinder engines differ significantly in rotational dynamics, gas intake dynamics, heat transfer dynamics, dynamic coupling between cylinders, and in other areas. Charge motion within the cylinder, even during the closed period differs from the multi-cylinder engine because of the differences in both instantaneous flow and momentum. Researchers in the Powertrain Control Research Laboratory (PCRL) at the University of Wisconsin-Madison have developed single-cylinder engine transient test systems that control the instantaneous dynamic cylinder boundary conditions to replicate those in the target multi-cylinder engine. The overall goal is to exploit the benefits of the single-cylinder engine, while eliminating the negative aspects of this device, and to have the single-cylinder “think” it is dynamically operating within a multi-cylinder engine. This paper describes the latest developments in controlling the intake gas dynamics of the single-cylinder engine to meet these goals. A combination of both rotary and proportional valves are used to accurately replicate the instantaneous intake airflow that exists in the multi-cylinder engine, including during transients. A Fourier-based approach instead of the previous time-based trajectory control is used to accomplish these goals. This is a third generation of intake air simulator (IAS3) that is a significant step forward in both simplifying the system, and in significantly expanding the operating envelop of the engine to include the full engine operating range of the multi-cylinder engine. A brief introduction of the entire transient test system will show the reader how rotational, heat transfer, and gas dynamics are controlled, and how the IAS3 fits into this overall system.

Engine Start Simulation on an Engine Transient Test System: Hardware and Controls

2007 ◽  
Author(s):  
Brian D. Krosschell ◽  
Stephen J. Klick ◽  
John J. Moskwa
Keyword(s):  
Cold Start ◽  
Testing Procedure ◽  
Test System ◽  
Stiff System ◽  
Powertrain Control ◽  
Single Cylinder Engine ◽  
Control Research ◽  
High Bandwidth ◽  
Very High ◽  
Engine Start

The goal of this research is to use a hydrostatic transient dynamometer combined with new control techniques to replicate multi-cylinder engine dynamics which occur while the engine is started by an electric starting system. The transient engine dynamometer test system in the Powertrain Control Research Laboratory (PCRL) uses a torque tube and extremely stiff driveline in order to provide a very high bandwidth of torque actuation. The design and nature of this low inertia, stiff system requires that a standard electrical starting system be omitted. One of the objectives of this research was to assemble a new engine on the hydrostatic dynamometer and model the starting dynamics which occur during an engine cold start. The other objective was to verify and compare data collected by the PCRL and Ford to validate testing. This information will then be used in support of development of a cold start testing procedure on the single-cylinder engine transient test system in the PCRL.

scholarly journals Meitner-Auger Electron Emitters for Targeted Radionuclide Therapy: Mercury-197m/g and Antimony-119

2021 ◽  
Vol 14 ◽  
Author(s):  
Parmissa Randhawa ◽  
Aeli P. Olson ◽  
Shaohuang Chen ◽  
Kaley Lexi Gower-Fry ◽  
Cornelia Hoehr ◽  
...  
Keyword(s):  
Radionuclide Therapy ◽  
Auger Electron ◽  
State Of The Art ◽  
Delivery Systems ◽  
Cellular Level ◽  
The State ◽  
Targeted Radionuclide Therapy ◽  
University Of Wisconsin ◽  
Electron Emitters ◽  
The University

Abstract:: Targeted Radionuclide Therapies (TRTs) based on Auger emitting radionuclides have the potential to deliver extremely selective therapeutic payloads on the cellular level. However, to fully exploit this potential, suitable radionuclides need to be applied in combination with appropriate delivery systems. In this review, we summarize the state-of-the-art in production, purification, chelation and applications of two promising candidates for Targeted Auger Therapy, namely antimony-119 (119Sb) and mercury-197 (197Hg). Both radionuclides have great potential to become efficient tools for TRT. We also highlight our current progress on the production of both radionuclides at TRIUMF and the University of Wisconsin.

IC Engine Transient Heat Transfer System Hardware and Simulation

2007 ◽  
Author(s):  
Stephen J. Klick ◽  
Brian Krosschell ◽  
John J. Moskwa
Keyword(s):  
Heat Transfer ◽  
Control Strategies ◽  
Test System ◽  
Transient Heat Transfer ◽  
Intake Manifold ◽  
Ic Engine ◽  
Loop Control ◽  
Single Cylinder ◽  
Powertrain Control ◽  
Control Research

One of the ongoing goals of the Powertrain Control Research Laboratory (PCRL) at University of Wisconsin-Madison is to expand the capabilities of the single-cylinder internal combustion research engine by bringing its operation closer to that of its multi-cylinder counterpart. The PCRL has already replicated the rotational dynamics and intake manifold dynamics of a multi-cylinder engine on a single-cylinder research engine. This paper covers the development of an addition to the single-cylinder test system that will allow the replication of transient heat transfer that normally occurs in a multi-cylinder engine from the engine to the coolant. This system will include physical hardware as well as real time hardware-in-the-loop control strategies using MATLAB/Simulink and dSPACE software.

Some Biological Applications of High Voltage Electron Microscopy

1974 ◽  
Vol 32 ◽  
pp. 298-299
Author(s):  
Hans Ris
Keyword(s):  
High Voltage ◽  
Chromosome Structure ◽  
Nerve Fibers ◽  
Good Resolution ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
High Voltage Electron ◽  
One Year ◽  
The University

The High Voltage Electron Microscope Laboratory at the University of Wisconsin has been in operation a little over one year. I would like to give a progress report about our experience with this new technique. The achievement of good resolution with thick specimens has been mainly exploited so far. A cold stage which will allow us to look at frozen specimens and a hydration stage are now being installed in our microscope. This will soon make it possible to study undehydrated specimens, a particularly exciting application of the high voltage microscope.Some of the problems studied at the Madison facility are: Structure of kinetoplast and flagella in trypanosomes (J. Paulin, U. of Georgia); growth cones of nerve fibers (R. Hannah, U. of Georgia Medical School); spiny dendrites in cerebellum of mouse (Scott and Guillery, Anatomy, U. of Wis.); spindle of baker's yeast (Joan Peterson, Madison) spindle of Haemanthus (A. Bajer, U. of Oregon, Eugene) chromosome structure (Hans Ris, U. of Wisconsin, Madison). Dr. Paulin and Dr. Hanna are reporting their work separately at this meeting and I shall therefore not discuss it here.

Ultrastructural characteristics of sporidia of Ustilago

1989 ◽  
Vol 47 ◽  
pp. 786-787
Author(s):  
Patricia N. Hackney
Keyword(s):  
Electron Microscope ◽  
Type System ◽  
Tube Formation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
Transmission Electron ◽  
Ustilago Hordei ◽  
Silene Alba ◽  
The University

Ustilago hordei and Ustilago violacea are yeast-like basidiomycete pathogens ofHordeum vulgare and Silene alba respectively. The mating type system in both species of Ustilago is bipolar, with alleles, A,a, (U.hordei) and a1, a2 (U.violacea) at a single locus. Haploid sporidia maintain the asexual phase by budding, while the sexual phase is initiated by conjugation tube formation between the mating types during budding and conjugation.For observation of budding, sporidia were prepared by culturing the four types on YEG (yeast extract glucose) broth for 24 hours. After centrifugation at 5000g cells were either left unmated or mated in a1/a2,A/a combinations. The sporidia were then mixed 1:1 with 4% agar and the resulting 1mm cubes fixed in 8% gluteraldehyde and post fixed in osmium tetroxide. After dehydration and embedding cubes were thin sectioned with a LKB ultratome and photographed in a Zeiss 9s transmission electron microscope or in an AE1 electron microscope of MK11 1MEV at the High Voltage Electron Microscopy Center of the University of Wisconsin-Madison.

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