WARREN SEERING
Engineering in Sherborn, MA

6505085, Jan 7, 2003

Mar 4, 1999

09/261987

Timothy D. Tuttle - San Francisco CA
Warren P. Seering - Sherborn MA

Massachusetts Institute of Technology - Cambridge MA

G05B 1302

700 28, 700 33, 700 29

The system described herein determines an input command profile for a dynamic system that can be modeled as a linear system, the input command profile for transitioning an output of the dynamic system from one point to another point. The system identifies characteristics of the dynamic system, and then selects a command profile which defines an input to the dynamic system based on the identified characteristics. The command profile comprises one or more pulses which rise and fall at switch times, and the command profile is useable with substantially any dynamic system that can be modeled as a linear system. The system then imposes a plurality of constraints on the dynamic system, at least one of the constraints being defined in terms of the switch times, and determines the switch times for the input to the dynamic system based on the command profile and the plurality of constraints.

6694196, Feb 17, 2004

May 21, 2002

10/152407

Timothy D. Tuttle - Cambridge MA
Warren P. Seering - Sherborn MA

Massachusetts Institute of Technology - Cambridge MA

G05B 1302

700 28, 700 29, 700 33

A system for and method of determining an input command profile for substantially any dynamic system that can be modeled as a linear system, the input command profile for transitioning an output of the dynamic system from one state to another state. The present invention involves identifying characteristics of the dynamic system, selecting a command profile which defines an input to the dynamic system based on the identified characteristics, wherein the command profile comprises one or more pulses which rise and fall at switch times, imposing a plurality of constraints on the dynamic system, at least one of the constraints being defined in terms of the switch times, and determining the switch times for the input to the dynamic system based on the command profile and the plurality of constraints. The characteristics may be related to poles and zeros of the dynamic system, and the plurality of constraints may include a dynamics cancellation constraint which specifies that the input moves the dynamic system from a first state to a second state such that the dynamic system remains substantially at the second state.

5103421, Apr 7, 1992

Nov 29, 1988

7/277251

Allen C. Ward - Cambridge MA
Warren P. Seering - Sherborn MA

Massachusetts Institute of Technology - Cambridge MA

G06F 1520

395700

A digitally programmed computer takes as input a schematic of a mechanical system and specification of the overall system including utility and cost functions and provides as output catalog numbers from a pre-defined set for the optimal selection of working components implementing the design. The preferred embodiment provides the user with a high level symbolic language in which to interact with the programmed computer. The process of compilation or transformation from a high level language to a low level description, is based on a formalization of quantitative inferences about hierarchically organized sets of mechanical components and operating conditions. This method allows design compilation without the exhaustive enumeration of alternatives. This method of compilation as demonstrated in the preferred embodiment, is not limited to mechanical systems, but is applicable to any physical system composed of working components able to be defined by connected variables that can be clearly defined within various operating points and where the goal is to design an overall system achieving some pre-defined system requirements.

4916635, Apr 10, 1990

Sep 12, 1988

7/243315

Neil C. Singer - Brookline MA
Warren P. Seering - Sherborn MA
Kenneth A. Pasch - Brookline MA

Massachusetts Institute of Technology - Cambridge MA

G06F 1500

364513

A sequence of impulses is determined which eliminates unwanted dynamics of a dynamic system. This impulse sequence is convolved with an arbitrary command input to drive the dynamic system to an output with a minimum of unwanted dynamics. The input sequence is time optimal in that it constitutes the shortest possible command input that results in no unwanted dynamics of the system subject to robustness and implementation constraints. The preshaping technique is robust under system parameter uncertainty and may be applied to both open and closed loop sy The Government has rights in this invention pursuant to Grant Number N00014-86-K-0685 awarded by the Department of the Navy.