Download Control theoretic splines: Optimal control, statistics, and by Magnus Egerstedt PDF

By Magnus Egerstedt

Splines, either interpolatory and smoothing, have an extended and wealthy heritage that has mostly been software pushed. This e-book unifies those buildings in a accomplished and available method, drawing from the newest equipment and functions to teach how they come up certainly within the thought of linear keep an eye on structures. Magnus Egerstedt and Clyde Martin are major innovators within the use of keep watch over theoretic splines to assemble many varied purposes inside of a typical framework. during this publication, they start with a sequence of difficulties starting from direction making plans to statistical data to approximation. utilizing the instruments of optimization over vector areas, Egerstedt and Martin display how all of those difficulties are a part of an identical normal mathematical framework, and the way they're all, to a undeniable measure, a final result of the optimization challenge of discovering the shortest distance from some degree to an affine subspace in a Hilbert area. They hide periodic splines, monotone splines, and splines with inequality constraints, and clarify how any finite variety of linear constraints could be further. This e-book unearths how the various normal connections among keep watch over concept, numerical research, and facts can be utilized to generate robust mathematical and analytical tools.

This booklet is a wonderful source for college kids and pros up to speed concept, robotics, engineering, special effects, econometrics, and any region that calls for the development of curves in line with units of uncooked data.

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Additional info for Control theoretic splines: Optimal control, statistics, and path planning

Example text

7) It is convenient to set x0 = 0 since the initial data can be absorbed into the data set, as will be shown in later chapters. 3). However, since t (s) is scalar, the two formulations are equivalent. 9) which, together with the assumption that x(0) = 0, gives us the fundamental relationship y(t) = Lt (u). 3). Using this notation, we have dk y(t) = D k Lt (u). 2 INTERPOLATING SPLINES In this section, we consider the first fundamental problem, namely, the problem of constructing a control law u(t) that drives the output function y(t) through a set of data points at prescribed times.

We do not make that extension in this section, but restrict ourselves to ensuring that the spline is nondecreasing at each node. This problem has a significant increase in difficulty over the problems we have considered to this point. Problem 5: Monotone Smoothing Splines Let J(u) = ρ T 0 u2 (t)dt + N wi (Lti (u) − αi )2 , i=1 and let a set of constraints be imposed as DLti (u) ≥ 0, i = 1, . . , N. The problem then becomes min J(u). u∈L2 We define H as 1 H(u, λ) = J(u) + 2 N i=1 2 wi (Lti (u) − αi ) − N λi DLti (u).

In Problem 7, we state the general output tracking problem and show that Problem 6 is indeed a special case of this problem. Finally, in Problem 8, we state a version of the trajectory planning problem. The statement of this problem involves the previous seven problems. Although the solution is not given, we do present an algorithm that will at least produce a suboptimal solution. It should in fact be stressed that none of these problems will be solved to completion in this chapter, but rather they are to be thought of as motivating the further developments in later chapters as well as future research.

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