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Real-Time Helicopter Flight Control Test Bed, Toby J. Pallett, Brad J. Wolfert, Shaheen Ahmad Jul 1991

Real-Time Helicopter Flight Control Test Bed, Toby J. Pallett, Brad J. Wolfert, Shaheen Ahmad

Department of Electrical and Computer Engineering Technical Reports

The goal of this paper is to describe a test bed for real-time helicopter flight control systems and some initial control experiments utilizing the test bed. The developed test bed consists of an off-the-shelf radio control helicopter which has been modified so that it can be computer controlled. The helicopter is mounted on a sensor equipped test fixture which provides information on the helicopter's position and attitude while allowing it to move freely within some limited area. In this paper we describe the hardware and software developed to allow real-time helicopter flight control and plant identification. In addition we propose …


An Nc Algorithm For Scheduling Unit-Time Jobs With Arbitrary Release Times And Deadlines, Greg N. Frederickson, Susan H. Rodger Jun 1991

An Nc Algorithm For Scheduling Unit-Time Jobs With Arbitrary Release Times And Deadlines, Greg N. Frederickson, Susan H. Rodger

Department of Computer Science Technical Reports

No abstract provided.


Philco: Some Recollections Of The Philco Transac S-2000, Saul Rosen Jun 1991

Philco: Some Recollections Of The Philco Transac S-2000, Saul Rosen

Department of Computer Science Technical Reports

No abstract provided.


Porting Ncube Packages To Ipsc/860 And Ipsc/2 Hypercubes, Jingwen Wang, Mo Mu Jun 1991

Porting Ncube Packages To Ipsc/860 And Ipsc/2 Hypercubes, Jingwen Wang, Mo Mu

Department of Computer Science Technical Reports

No abstract provided.


Ambivalent Data Structures For Dynamic 2-Edge-Connectivity And K Smallest Spanning Trees, Greg N. Frederickson Jun 1991

Ambivalent Data Structures For Dynamic 2-Edge-Connectivity And K Smallest Spanning Trees, Greg N. Frederickson

Department of Computer Science Technical Reports

No abstract provided.


Negotiating And Supporting Interdependent Data In Very Large Federated Database Systems, Ahmed K. Elmagarmid, James G. Mullen Jun 1991

Negotiating And Supporting Interdependent Data In Very Large Federated Database Systems, Ahmed K. Elmagarmid, James G. Mullen

Department of Computer Science Technical Reports

No abstract provided.


Design And Implementation Of A Distributed System With Dynamic Resource Allocation Based Upon Bidding Schemes, Dan C. Marinescu, Kenneth Wenstrup, Patrick Davis Jun 1991

Design And Implementation Of A Distributed System With Dynamic Resource Allocation Based Upon Bidding Schemes, Dan C. Marinescu, Kenneth Wenstrup, Patrick Davis

Department of Computer Science Technical Reports

No abstract provided.


Performance Experiments And Optimizations Of Pde Sparse Solvers On Hypercubes,, Mo Mu, John R. Rice, Jingwen Wang Jun 1991

Performance Experiments And Optimizations Of Pde Sparse Solvers On Hypercubes,, Mo Mu, John R. Rice, Jingwen Wang

Department of Computer Science Technical Reports

No abstract provided.


Fundamental Techniques For Geometric And Solid Modeling, Christoph M. Hoffmann, George Vanĕček Jun 1991

Fundamental Techniques For Geometric And Solid Modeling, Christoph M. Hoffmann, George Vanĕček

Department of Computer Science Technical Reports

No abstract provided.


Amp-Cad: Automatic Assembly Motion Planning Using C Ad Models Of Parts, S. N. Gottschlich, A. C. Kak Jun 1991

Amp-Cad: Automatic Assembly Motion Planning Using C Ad Models Of Parts, S. N. Gottschlich, A. C. Kak

Department of Electrical and Computer Engineering Technical Reports

Assembly with robots involves two kinds of motions, those that are point-to-point and those that are force/torque guided, the former kind of motions being faster and more amenable to automatic planning and the latter kind being necessary for dealing with tight clearances. In this paper, we describe an assembly motion planning system that uses descriptions of assemblies and CAD models of parts to automatically figure out which motions should be point-to-point and which motions should be force/torque guided. Our planner uses graph search over a potential field representation of parts to calculate candidate assembly paths. Given the tolerances of the …


Learning: An Experiment With Five Selection Forms, John R. Rice May 1991

Learning: An Experiment With Five Selection Forms, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Correspondence Problem In Image Sequence Analysis, Chia-Hoang Lee, Anupam Joshi May 1991

Correspondence Problem In Image Sequence Analysis, Chia-Hoang Lee, Anupam Joshi

Department of Computer Science Technical Reports

No abstract provided.


Predictive Adaptive Control Of Multiple Robots In Cooperative Motion, Mohamed Zribi, Shaheen Ahmad May 1991

Predictive Adaptive Control Of Multiple Robots In Cooperative Motion, Mohamed Zribi, Shaheen Ahmad

Department of Electrical and Computer Engineering Technical Reports

In this paper we address the problem of controlling multiple robots manipulating a rigid object cooperatively when the robots and load parameters are uncertain. We propose a controller that takes into account the dynamics of both the load and the manipulators. The linearity of the dynamics of the robots and the load, with respect to the unknown parameters, is exploited during the derivation of the parameter adaptation scheme. In order to design a control and update laws that do not require the measurements of the of the joint accelerations or the load acceleration, the dynamics of both the robots and …


Stability Of Token Passing Rings, Leonidas Greorgiadis, Wojciech Szpankowski May 1991

Stability Of Token Passing Rings, Leonidas Greorgiadis, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Maximum Queue Length And Waiting Time Revisited: Multiserver G|G|C Queue, John S. Sadowsky, Wojciech Szpankowski Apr 1991

Maximum Queue Length And Waiting Time Revisited: Multiserver G|G|C Queue, John S. Sadowsky, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Route Adaptation And Persistence In Networks, Kenneth R. Rodemann Apr 1991

Route Adaptation And Persistence In Networks, Kenneth R. Rodemann

Department of Computer Science Technical Reports

No abstract provided.


Learning, Teaching, Optimization And Approximation, John R. Rice Apr 1991

Learning, Teaching, Optimization And Approximation, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Logical Inference Of Horn Clauses In Petri Net Models, C. Lin, A. Chaudhury, A. B. Whinston, Dan C. Marinescu Apr 1991

Logical Inference Of Horn Clauses In Petri Net Models, C. Lin, A. Chaudhury, A. B. Whinston, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.


A Framework For Intelligent Parallel Compilers, Ko-Yang Want Apr 1991

A Framework For Intelligent Parallel Compilers, Ko-Yang Want

Department of Computer Science Technical Reports

No abstract provided.


On The Impossibility Of Atomic Commitment In Multidatabase Systems, James G. Mullen, Ahmed K. Elmagarmid Apr 1991

On The Impossibility Of Atomic Commitment In Multidatabase Systems, James G. Mullen, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.


Preventing Weak Password Choices, Eugene H. Spafford Apr 1991

Preventing Weak Password Choices, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


Determining Maximum K-Width-Connectivity On Meshes, Susanne E. Hambrusch, Frank Dehne Mar 1991

Determining Maximum K-Width-Connectivity On Meshes, Susanne E. Hambrusch, Frank Dehne

Department of Computer Science Technical Reports

No abstract provided.


A Parallel Algorithm For Computing Invariants Of Petri Net Models, Dan C. Marinescu, Mike Beaven, Ryan Stansifer Mar 1991

A Parallel Algorithm For Computing Invariants Of Petri Net Models, Dan C. Marinescu, Mike Beaven, Ryan Stansifer

Department of Computer Science Technical Reports

No abstract provided.


A Purdue University Course In The History Of Computing, Saul Rosen Mar 1991

A Purdue University Course In The History Of Computing, Saul Rosen

Department of Computer Science Technical Reports

No abstract provided.


Interoperability In Multidatabase Systems, Omran A. Bukhres, Ahmed K. Elmagarmid Mar 1991

Interoperability In Multidatabase Systems, Omran A. Bukhres, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.


Transaction Models For Advanced Database Applications, Ahmed K. Elmagarmid Mar 1991

Transaction Models For Advanced Database Applications, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.


Relax: A Software Platform For Pde Interface Relaxation Methods, Scott Mcfaddin, John R. Rice Mar 1991

Relax: A Software Platform For Pde Interface Relaxation Methods, Scott Mcfaddin, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


On Alternate Solid Representations And Their Uses, Christoph M. Hoffmann, George Vanĕček Mar 1991

On Alternate Solid Representations And Their Uses, Christoph M. Hoffmann, George Vanĕček

Department of Computer Science Technical Reports

No abstract provided.


On The Iterative Solution Of Line Spline Collocation Schemes For Elliptic Pdes, A. Hadjidimos, Elias N. Houstis, John R. Rice, E. A. Vavalis Mar 1991

On The Iterative Solution Of Line Spline Collocation Schemes For Elliptic Pdes, A. Hadjidimos, Elias N. Houstis, John R. Rice, E. A. Vavalis

Department of Computer Science Technical Reports

No abstract provided.


Maintaining Consistency Of Interdependent Data In Multidatabase Systems, Amit P. Sheth, Yungho Leu, Ahmed K. Elmagarmid Mar 1991

Maintaining Consistency Of Interdependent Data In Multidatabase Systems, Amit P. Sheth, Yungho Leu, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.