Jack Crenshaw Email & Phone Number

Jacksonville, Florida Area

Kleinmachnow, Brandenburg, DE

PT Scientists began as Part-Time Scientists, a Berlin-based amateur team competing for the Google Lunar X-Prize (GLXP). During the years I worked with them, we developed a very mature Lunar Rover, and tested it in a wide range of rugged test sites from the Arizona Meteor Crater to the Kilimanjaro mountain. More recently, they have also developed a.

Author, "Math Toolkit for Real-Time Programming" Author and Columnist for Computer Language and Embedded Systems Development magazines.My highly-rated Embedded Systems column, "Programmer's Toolbox," ran from 1989 through 2013. It focused mostly on math algorithms for use in embedded systems.My 1989 paper, “The Nuts & Bolts of Compiler Construction,” in.

US

Working on a major USAF program to simulate ABM system performance, I developed math models and software implementations for the simulation. I also developed an extensive library of algorithms to support digital system analysis. I also created and taught a seminar on the use of MATLAB/Simulink to simulate flight dynamics.Working in the Modeling &.

Analysis and dynamic simulation of smart weapon system. Acting to improve the company's analytical capabilities, I introduced the use of both Mathcad and MATLAB/Simulink. I developed a Mathcad analysis to characterize and simulate the extraction of radar data from ground clutter. Working with the US Army Missile Command, I helped integrate out prototype.

This manufacturer of hospital patient monitors had an existing product based on multiple Z80 processors, executing Z80 assembly language. They wanted to replace it with a new product using a single 386/486, running code written in C. To meet FDA certification requirements, we had to ensure that the the new product's behavior was functionally the same as.

Led a group of four consultants developing real-time. embedded system software and analysis on four separate contracts related to a company's satellite tracking antenna products. Three of the tasks involved modifying legacy software where the customer no longer had the source code, or even the development systems originally used. To meet the requirements.

Charlotte, North Carolina, US

Senior Staff Engineer, Aerospace DivisionSupervisor, Software.Technology GroupSupervisor, Advanced Analysis GroupLead Engineer, Ada Support GroupLead Engineer, Software Tools GroupChairman, Software Technical Advisory CommitteeLed the development of flight software for the Army TACMS Ground-to-Ground missile. Per contract, wrote the software requirements.

Boston, MA, US

For this project to develop numerical control software for GE's line of industrial robots, I was tasked to improve software productivity and reduce development/debug time. I introduced formalsoftware methodologies and formal review practices. Chaired design reviews. Led several teams to develop specific hardware/software tools. As manager of the Software.

Charlotte, North Carolina, US

ASupervisor, Software Technology GroupChairman, Software Technical Advisory CommitteeIn this matrix-organized software group, I managed the assignment of some 50 engineers to active programs. I also managed 10 engineers on short-term departmental projects.Sat on a corporate-level board to define software-related projects and tools to improve.

Managed Heath's software team, developing software for their line of Heathkit 8-bit and 16-bit kit computers. A main goal was to introduce modern software methodologies and programming practices into a mostly ad hoc process. Negotiated with principals of Microsoft, Peachtree Software, Lifeboat, UCSD, and other vendors ti adapt their software to Heathkit's.

On contract to the US Army, developed software for a major, high-fidelity simulation of air-launched, anti-radar missile. Using my general-purpose simulation architecture, developed a simplified simulation to serve as a validation tool for the larger sim. It was 100x faster than the larger sim.Identified and suggested corrections for several design flaws.

Bid/Won a NASA contract related to the joint NASA/USAF Interim Upper Stage (IUS). The IUS was a two-stage solid-fuel, Shuttle-borne rocket intended to boost satellites into geostationary orbits. Our contract was to define NASA-unique software requirements. I led the contract team.The job required complicated, high-level meetings with representatives of.

US

Taught Computer Science classes and labs from freshman through graduate levels. Developed many innovative techniques to better teach students with no prior experience with computing concepts. Was voted one of two best professors in the department.Chaired multiple senior projects.Created and set up a lab for microprocessor-related learning. Taught two-day.

Founded in 1974, this company pioneered the use of microprocessors in industrial-quality embedded systems. Products included a 4040-based cold-forge controller, an 8080-based controller for a satellite tracking antenna, and one of the first viable kit computers, the Micro-440. In 1975, this coThe company pioneered the use of microprocessors This startup.

Falls Church, VA, US

Using my simulation architecture, developed 12 dynamic simulations, for problems ranging from attitude control to Control Moment Gyros (CMG's) to coupled rigid bodies to lunar trajectories. Used them in several studies. Developed generalized equations for systems of coupled rigid bodies.Studied the problem of singularity avoidance in Single-Gimbal CMGs..

Armonk, New York, NY, US

Using my general-purpose simulation architecture, developed two major attitude control simulations, one of which remained in routine use for decades. The simulation used best practices of information hiding and modular design, packaging simulation data with the procedures operating on them, thereby presaging modern object-oriented methods.

Associate Professor, Physics Dept. Taught sophomore physics classes 201, 202, 203. Developed system for computer grading of Physics lab reports. Developed general-purpose architecture for simulation of dynamic systems. Used it for attitude simulation of rotating spacecraft. Pioneered the use of quaternions in attitude simulations.Under NASA contract.

Staff Engineer, Apollo Support Division. Generated trajectories for Apollo missions, studied abort trajectories. Two of my abort profiles, quick return and fast return, became part of Apollo flight plan. Reduced universal variable formulations to practice in several trajectory simulations. Refined use of nested differential correction algorithms.

Led trajectory analysis team for GE's Apollo study contract and Apollo proposal effort. We generated all trajectories for these studies. Independently developed universal variable formulation of two-body problem. Generated first trajectories for return from the Moon.Pioneered use of differential correction for trajectory targeting.Independently developed.

Performed seminal study of circumlunar trajectories, precursor to Apollo. Performed studies on trajectory optimization, solar sails. Invented thin-film image intensifier tube.

Ph.D., Physics

M.S., Physics

B.S., Physics