Failure detection schemes in control actuation systems for launch vehicles
Source: International Journal of Automation and Control, Volume 4, Number 3, 2 June 2010 , pp. 284-297(14)
Publisher: Inderscience Publishers
Abstract:Control actuation systems are used for the attitude control of launch vehicles. They are basically closed loop position servo systems by means of which the engine or nozzle of the rocket is vectored based on the commands coming from onboard computer. The two important elements of a typical control actuation system are the control electronics and the actuators. Control electronics plays a vital role in the success of a launch vehicle mission. To avoid single point failures and hence, to improve the reliability of the system, various redundancy schemes are used in control actuation systems. The main factors to be considered for selection of redundancy scheme are the increase in weight, size, improvement in reliability, etc. In this paper, a case study of a typical dual redundant electromechanical control actuation system is highlighted. Various redundancy schemes were studied considering their merits and complexity of implementation. The configuration chosen ensures lesser switchover transient and has less complexity compared to triple and quad redundant systems. A dual redundant controller in active standby mode is realised and the test results are attached.
Document Type: Research article
Affiliations: 1: Control Electronics and Checkout Division in Vikram Sarabhai Space Centre, Thiruvananthapuram, Kerala, India. 2: Computers and Digital Systems Group in Vikram Sarabhai Space Centre, Thiruvananthapuram, Kerala, India; Indian Institute of Space Technology, Thiruvananthapuram, Kerala, India
Publication date: 2010-06-02
- The objectives of the International Journal of Automation and Control are to establish an effective channel of communication between developers, system integrator, technocrats, academic and research institutions and persons concerned with the complex role of automation and control architecture in the target systems. It also aims to promote and coordinate developments in this field. The international dimension is emphasised in order to overcome "developing" and "developed" barriers and to meet the needs of accelerating technological and innovative changes.
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