The technique is implemented on a rotor reproducing the typical dynamic behaviour of an aero-engine gas turbine shaft. To identify the hypothesized effects, we exploit exogenous variation generated by age-based CEO retirement policies in Indian public sector firms.
Research papers on magnetic bearing results obtained with sensed and self-sensing controls are compared to show the good quality of the damping performance reached with the proposed self-sensing technique.
Studies 2 and 3 reveal, respectively, that consumption of, and even mere exposure to spicy food, can semantically activate concepts related to aggression as well as lead to higher levels of perceived aggressive intent in others. This paper describes the design and construction of permanent magnet biased, actively controlled magnetic bearings for a flexible rotor.
The effectiveness of the proposed method is evaluated experimentally by measuring unbalance response in open and closed-loop configuration showing a reduction of displacement during critical speed crossing from 0.
The results include measurements of power consumption, load capacity, bearing linearized coefficients, and the dynamic response of the rotor. We observe that ownership structure and management have significant bearing on internationalization strategies of family firms, as family owners and managers are more averse to internationalization.
We use archival and interview data on thirty-six new ventures in eight Indian family firms to identify these logics.
Across three studies, we find evidence for this proposition. Economic, Expertise, Reputation and Attachment. The control design is described along with a sensitivity analysis on the most critical model parameters and a study of electromagnet nonlinear effects on the closed loop behaviour.
For the Research papers on magnetic bearing bearing, both permanent magnets and electromagnets are used in a configuration which effectively provides the necessary fluxes in the appropriate air gaps to support the rotor.
Received June 11, ; Revised December 14, ; Online January 24, Citing Articles Abstract Magnetic bearings have relatively low power consumption compared to fluid film and rolling element bearings.
However, certain contingencies, such as the higher ownership of foreign institutions and presence of professional managers, help business families improve their understanding of international markets, reduce the fear of the unknown, and better appreciate the benefits of internationalization, thereby aiding greater internationalization of family firms.
Our analysis shows that the interaction between firm and family institutional logics in Indian family firms generates four sub-logics: Study 1 reveals that those who typically consume spicy food exhibit higher levels of trait aggression.
The proposed technique is based on a Luenberger observer that estimates the mechanical states of the system. We describe one application under development that provides timely price information to farmers, traders and policy makers. As evidence of motivation, we show that earnings management increases likelihood of directorship positions in other firms within two years of retirement.
These inter-institutional logics help reconcile the tensions that often arise in the family firms during strategic decision-making. These four logics are used to frame and screen new venture opportunities and justify resource allocation.
We also theorize how certain contingencies, such as the presence of foreign institutional ownership and family management, moderate the relationship between family ownership and internationalization strategy. Our work contributes to the literature on precursors of aggression, and has substantive implications for several stakeholders, including marketers, parents and policy makers.
Published Papers Batra, Rishtee Kumar. The rotordynamic and electromechanical modeling is illustrated taking into account the anisotropy of rotor elastic supports.
In this article, we outline the beginnings of data science applications in Indian agriculture. Wisdom from ancient texts and practitioners of alternative medicine seem to share the intuition that consuming spicy food may increase aggression. We argue that in societies where the traditional family dominates social and economic life, the relationship between the two institutions, the firm and the family, is managed via inter-institutional logics.
Tribol 4Oct 01, 8 pages doi: We cover various initiatives such as data collection, visualization and information dissemination and applications of algorithmic data analysis techniques for decision support. A phase of experimental identification of actuator parameters is performed on the open-loop system response to improve the reliability of the model.
Furthermore, a classical AMD realized with the use of position sensors is implemented on the same rotor. The theoretical development related to the bearing design is presented along with some experimental performance results. The observed states are fed back in closed-loop to introduce damping into the system and to reduce the vibrations during critical speed crossing.
Since banking is intrinsically an opaque activity, we hypothesize that an incoming CEO of a bank is more likely to manage earnings than a counterpart in a non- financial firm.
The measured total power consumption, excluding shaft losses, was watts in the permanent magnet biased bearing. They are now candidates for supporting gas turbines and aeropropulsion engines.
Internationalization has emerged as a dominant strategy for firms in a globally interconnected world. We test our predictions by using a proprietary, longitudinal panel dataset of leading family firms from India and find support for most of our theoretical predictions.
In contrast to banks, we observe no earnings management coinciding with CEO turnover for other public sector firms.reviewed formal professional papers but has less stringent limitations on manuscript Magnetic bearing research is a vital component for programs such as the Versatile Affordable Advanced Engine (VAATE) program.
U.S. Army Research Laboratory An Overview of Magnetic Bearing Technology for Gas Turbine Engines.
Research Papers words ( pages) Magnetic Bearings and Heat Essay - One of the main problems associated with the design and application of active magnetic bearings is excessive heat. In the past few years, ISB faculty members have published over 60 papers in top-tier journals.
Our faculty have received numerous coveted research grants awarded by premier academic institutions, research centres, corporate houses and reputed foundations such as the Bill and Melinda Gates Foundation, Ford Foundation. lubrication, bearing friction, high energy dissipation, limited rotational speed etc.
Active magnetic bearing systems have tremendous potential for many areas such as. magnetic bearing system for a shaft is as follows: ten electromagnets, five displacement sensors, one evaluation unit, one control unit, five power amplifiers, and The magnetic force used in magnetic bearings can be divided into two categories of how the force is created: reluctance force and Lorentz force.
The reluctance force. RESEARCH PAPERS. Magnetic Bearing Design for Reduced Power Consumption. This paper describes the design and construction of permanent magnet biased, actively controlled magnetic bearings for a flexible rotor. The rotor was originally supported in fluid film bearings consuming as much as watts of power.
For the magnetic bearing.Download