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Erlangen, Phil. Diss. v. 29. Sept. 1912, Ref. Schulten. / Soll vollst. im Buchh, ersch.

Erlangen, Phil. Diss. v. 29. Sept. 1912, Ref. Schulten. / Soll vollst. im Buchh, ersch.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 56-59). Also available via the Internet.

This thesis is an exploration into the development and professionalism of management in the Ordnance Factories from 1855 to 1925. Writing in 1969, Ashworth commented that: "Naval historians have usually been concerned much more with warfare, politics, the careers of great leaders than with the business side of the service. The technical characteristics of warships and their annament have received much attention, but the economic question (apart from the simple demand for money), which have been inseparably linked with technical advance, has attracted less study. Yet there are several ways in which the provision and running of a large and growing navy must have a peculiar significance and interest for the economic historian." (Ashworth, 1969: 491) This is also similar to the development of the Anny from 1855. Recent historians have focused on the Ministry of Munitions as the catalyst for management change within government departments. In particular Loft (1986, 1988, 1994) and Marriner (1980) have explored the change in government accounting procedures within the Ministry of Munitions due to the proliferation of professional accountants into the wartime government as temporary civil servants. There is a notion in history that the pre-I915 War Office was regarded as an inefficient organisation whereas the temporary and monolithic Ministry of Munitions is heralded as the organisation of change, having the services of "the men of push and go" (Lloyd- George, 1938; Adams, 1978). The refonns of the Ordnance Factories from 1862 were mainly accounting driven and the catalyst for these changes were probably due to the logistical failures of the British Anny in the Crimean War. The refonns themselves were undertaken by civil servants although there was a nucleus of military talent, the concept of the soldier technologist was never as influential as the American experience. However, the Ordnance Factories did evolve into a factory system in the post-Crimean era, whereas the contemporary engineering industry was still dominated by the myth of the craft skill, subcontracting and a workshop ethos. By 1915 the Ordnance Factories reflected a high degree of professionalism within its management ethos which probably was better than that experienced by the contemporary private sector.

Impact point dispersion of a direct fire rocket can be drastically reduced with a ring of appropriately sized lateral pulse jets coupled to a trajectory tracking flight control system. The system is shown to work well against uncertainty in the form of initial off-axis angular velocity perturbations as well as atmospheric winds. For an example case examined, dispersion was reduced by a factor of one hundred. Dispersion reduction and mean miss distance are strong functions of the number of individual pulse jets, the pulse jet impulse, and the trajectory tracking window size. Proper selection of these parameters for a particular rocket and launcher combination is required to achieve optimum dispersion reduction to the pulse jet control mechanism. For the lateral pulse jet control mechanism that falls into the category of an impulse control mechanism, the trajectory tracking flight control law provides better reduction in dispersion and mean miss distance than the proportional navigation guidance law especially when small number of individual pulse jets is used. Estimation of body frame components of angular velocity and angular acceleration of a rigid body projectile undergoing general three-dimensional motion using linear acceleration measurements is considered. The results are comparable to those obtained from a conventional Inertial Measurement Unit (IMU) that composes of accelerometers and gyroscopes. From the study of the effect of sensor errors to the measurement and the control performance, the sensitivity of the angular rate estimation to the sensor noise is a strong function of the constellation of these three accelerometers. When more than three point measurements are used, the most effective method to fuse data is with one cluster that contains all sensors. In the conventional IMU, the dispersion and miss distance are less sensitive to the errors from accelerometers than to the gyroscopes. The estimation of angular rates plays essential roles in the performance of the control system in the reduction of dispersion and miss distance. The use of many accelerometers does not guarantee to reduce the sensitivity to errors. The selection of constellation among accelerometers in the data fusion process must be carefully taken into account. / Graduation date: 2002

Thesis (M.S. in Applied Sciences)--Naval Postgraduate School, June 2003. / Thesis advisor(s): Peter Chu, Eric Gottshall. Includes bibliographical references (p. 69). Also available online.

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