A MATHEMATICAL APPROACH TO COST MINIMIZATION OF SATCOM SYSTEMS

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Authors
  1. Felstead, E.B.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
Traditionally, costing analysis of satellite systems tended to be an iterative process of designing to meet the requirements, adding up the costs. If the total is too large, then the design is modified or requirements changed, the entire process is repeated. Unfortunately, the cost analysis has tended to look at component costs, such as payload and terminal costs, in isolation with little concern about how the costs of one affect the costs of the other. In this paper, a mathematical technique is described that formalizes the process of cost minimization by trading off interrelated parameters. In the first step, the total life-cycle cost function is described as the sum of 7 interrelated major terms. In turn, each of these consist of many terms. The second step is the determination of cost functions terms. Then, equations that tie certain of the component items together are determined. Finally, the cost is minimized by varying the component parameters to give minimum total cost. To illustrate the approach three examples are given: 1) terminal power and antenna gain, and payload power and antenna gain are tied together with the link equations, 2) terminal reliability and maintainability are related by the availability relation, and 3) spacecraft sparing and reliability are balanced to achieve the specified constellation reliability. The examples show that cost minimums exist and can be determined with potential for considerable savings. TRUNCATED
Report Number
STC-PROC-11-1995-VOL-1-PAP-8 — CONTAINED IN 98-01468
Date of publication
01 Apr 1995
Number of Pages
22
DSTKIM No
98-01476
CANDIS No
508126
Format(s):
Hardcopy;Document Image stored on Optical Disk

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