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- Jason Nightingale, Richard Hind, Bill Goodwine
- 2008 IEEE International Conference on Robotics…
- 2008

We obtain an intrinsic vector-valued symmetric bilinear form that can be associate with an underactuated simple mechanical control system. We determine properties of the form which serve as necessary conditions for driving underactuated simple mechanical control systems to rest. We also determine properties of the form that serve as sufficient conditions… (More)

Analysis and control of underactuated mechanical systems in the nonzero velocity setting remains a challenging problem. In this paper, we demonstrate the utility of a recently developed alternative representation of the equations of motion for this large class of nonlinear control systems. The alternative representation gives rise to an intrinisic symmetric… (More)

- Jason Nightingale, Bill Goodwine
- 21st Mediterranean Conference on Control and…
- 2013

We provide a constructive global discontinuous control law with state dependent switches for a class of under-actuated nonlinear mechanical robotic systems that will drive the system to an arbitrarily small neighborhood of rest from all initial configurations and velocities in arbitrarily small time. Because all physical mobile robotic systems are… (More)

- Bill Goodwine, Jason Nightingale
- 2010 IEEE International Conference on Robotics…
- 2010

This paper presents the definition of a new type of dynamic singularity for robotic manipulators. It is applicable to all underactuated robotic systems that can be described by Lagrange's equations where the Lagrangian is the kinetic minus potential energy. The approach is to decompose the velocity at every point in the configuration space into velocity… (More)

- P R Pedersen, J L Nightingale
- Applied optics
- 1989

A simplified method for calculating the power transfer resulting from nonparallel waveguide regions in directional couplers is presented. Measured values for several Ti:LiNbO(3) directional coupler geometries are given and shown to compare well with theory.

- B E Kincaid, R Blachman, J L Nightingale, R A Becker
- Optics letters
- 1989

LiNbO(3) waveguide substrates are terminated in out-of-plane 45 degrees -angled knife edges for the first time to our knowledge. This termination causes the guided wave to be totally internally reflected with excellent efficiency into or out of the waveguide surface, which allows new approaches for hybrid integration.

- J L Nightingale, R L Byer
- Optics letters
- 1986

A single-crystal Nd:YAG fiber with polished and coated endfaces has been operated as a monolithic, guided-wave laser oscillator. The 47-microm-diameter, 7-mm-length fiber oscillator operated with a threshold of 3.7 mW and a slope efficiency of 10.5%. Seventy-five percent of the laser power was in the fundamental spatial mode.

- Jason Nightingale, Richard Hind, Bill Goodwine
- WAFR
- 2008

Analysis and control of underactuated mechanical systems in the nonzero velocity setting remains a challenging problem. In this paper, we demonstrate the utility of a recently developed alternative representation of the equations of motion for this large class of nonlinear control systems. The alternative representation gives rise to an intrinisic symmetric… (More)

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