The suitability of discrete least-squares optimal (Wiener) filters
for deconvolution of tone-burst waveforms is studied. It is shown
that: (1) such waveforms are not well suited to these filters without
preprocessing, (2) the use of exponential weighting results in a significant
improvement in filter performance and (3) that "phase-unwrapping"
in...
Rapid advances in technology have seen computing move from a
large central computer to desktop microcomputers.
This advance was also
seen in the design of dedicated computers, computers designed to perform a
few specialized tasks or duties.
These computers, or microcontrollers, are
often controlled by a central computer and themselves...
This thesis discusses a special type of a versatile, distributed control system, the Taskmaster II. It includes a detailed specification of a readily realizable Taskmaster system utilizing a layered communication among units, oriented on the ISO OSI seven layer model. The specification was developed from the analysis of previous research...
As a result of the automation revolution, robots
are assuming ever more complex and demanding tasks.
Robot system control schemes for fast and precise robot
motion require utilization of the entirety of the robot
dynamic formulations and the ability to evaluate these
formulations in real-time. The dynamic formulations,
which take...
In this is paper, an implementation of a microprocessor
based distributed control system (DCS) is investigated. This
system consists of a digital PID controller and a high
level operator interface. A temperature control system
was designed to experimentally verify the system operation.
Experimental results compare closely with theoretical
prediction. The...
Hybrid-Meshnet is a communication subnet architecture for local area networks (LANs) designed to achieve a high degree of network performance and flexibility. These objectives are achieved by utilizing a dual channel structure. A token ring is used for short or prioritized data transmissions. A complimentary mesh network with arbitrary data...
This thesis discusses the hardware implementations of
certain linear and non-linear color space transforms thought
to be useful in the analysis of wood surfaces for defect
detection.
The developmental system's color image digitizer
contains 5 bits per color while the input signal contains
considerably greater resolution. This often degrades the...
Local computer networks are being installed in diverse application areas. Many of the networks employ a distributed control scheme, which has advantages in performance and reliability over a centralized one. However, distribution of control increases the difficulty in locating faulty hardware elements. Consequently, advantages may not be fully realized unless...
EDLAN is a simple, inexpensive local area network suitable for
educational applications. In EDLAN, a number of personal computers are
connected through an RS-485 global bus which carries the data
transmission among the computers. CSMA/CD protocol is used to control
the access of the global bus. The communications are controlled...
Control algorithms for accurate and fast moving robots require the use of the complete dynamic model of the robot. The complete dynamic model takes into account the nonlinearity and coupling terms of the whole structure. The time of computing the dynamic equations determines whether they are usable in practical applications....
This paper discusses the design strategies for interface of bus
architectures. It also describes the design of interface between the
two popular bus architectures, the Micro Channel and the Nu Bus.
The main objective of this thesis is to develop a procedure for
bus interface design and use this procedure...
This paper describes the design and implementation
of COLAN II, a control oriented local area network (LAN).
COLAN II employs a bus interconnection structure and
a token passing method to control the access to the bus.
Major emphasis of the work is on the system structure and
the software operating...
Two new medium access protocols for ring type local area networks,
CTR (Concurrent Token Ring) protocol and DRUID (Destination Removal
withoUt Intermediate node Delay) ring protocol, are proposed, designed and
analyzed. A destination partial removal technique is designed and used in
these two protocols to support concurrent message transmission and...
This paper describes the design and implementation of
COLAN V, a High Performance Local Area Network for
Communications and Control utilizing a Communications Coprocessor.
The main objective of this thesis is to improve upon
the performance of previous COLANs in speed, switching
techniques and error detection techniques. This was
possible...
This thesis discusses the design and development of a
viable local area network (LAN) which supports both
communications and control applications. The emphasis was
to develop a practical and cost effective system which
offered high performance while utilizing low cost
components. System cost was kept low by utilizing a
twisted-pair...
COLAN III is a control oriented LAN designed to achieve reasonable
network performance and flexibility at low cost. These objectives are
achieved by utilizing inexpensive microcontrollers (8031s) and hardware
support. The CSMA/CD network protocol with single bus structure has
been employed in COLAN III as an arbitration method to control...
Interest in personal computer networks has grown
rapidly in recent years. As the personal computer
becomes more and more popular, implementing computer
networks on those small computers has become an
interesting topic. Such networks are usually inexpensive
and can be easily installed and maintained.
In this thesis work, CLASSLAN, such...
COLAN (Control Oriented Local Area Network ) is a
redesign of the Task-Master, a daisy-chain structure
distributed control system. COLAN is a simple bus structure
communication subnetwork intended for distributed control
applications. Low cost and simplicity are two main design
criteria. Point-to-point and broadcast communications are
possible. A packet switching...
The Control-Oriented Local Area Network (COLAN) is a
distributed control system for a series of networked
microcontrollers, which has been under development at Oregon
State University since 1986. A reliable master controller, functioning
both as a task scheduler and as a network controller, is
required to allow users to perform...
This paper describes the design and implementation of
"A multiprocessor node for communication and control"
(MPCC). MPCC is a high speed, high performance local area
network capable of performing real time control tasks. This
is achieved by the concurrent operation of two 8051
microcontrollers, a dual port RAM and the...
Accurate Position Control is an important technique in
robotic engineering. The working environment of robotic
systems presents special requirements for position control.
The scope of this study is to explore the control algorithms
of a digital, hierarchical position control system. Detailed
analysis and simulation show that the system can be...
FISHNET (Facilities Integrated in a Shared Habitat) is a communication subnet architecture utilizing a hybrid application of point-topoint and broadcast communications to achieve a high degree of network performance. This objective is achieved through utilizing a dual bus structure: a data bus and a control bus. The data bus consists...