국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	TAILSIM Users Guide
저자	Dale W. Hiltner
Keyword	Aircraft icing; Tailplane icing; Stability and control; Flight dynamics; Flight simulation
URL	http://gltrs.grc.nasa.gov/reports/2000/CR-2000-210560.pdf
보고서번호	NASA CR-2000-210560
발행년도	2000
출처	NASA Glenn Research Center
ABSTRACT	The TAILSIM program uses a 4th order RungeKutta method to integrate the standard aircraft equationsofmotion (EOM). The EOM determine three translational and three rotational accelerations about the aircraftchr(39)s body axis reference system. The forces and moments that drive the EOM are determined from aerodynamic coefficients, dynamic derivatives, and control inputs. Values for these terms are determined from linear interpolation of tables that are a function of parameters such as angleofattack and surface deflections. Buildup equations combine these terms and dimensionalize them to generate the driving total forces and moments. Features that make TAILSIM applicable to studies of tailplane stall include modeling of the reversible control system, modeling of the pilot performing a load factor and/or airspeed command task, and modeling of vertical gusts. The reversible control system dynamics can be described as two hinged masses connected by a spring, resulting in a fifth order system. The pilot model is a standard form of leadlag with a time delay applied to an integrated pitch rate and/or airspeed error feedback. The time delay is implemented by a Pade approximation, while the commanded pitch rate is determined by a commanded load factor. Vertical gust inputs include a single 1cosine gust and a continuous NASA Dryden gust model. These dynamic models, coupled with the use of a nonlinear database, allow the tailplane stall characteristics, elevator response, and resulting aircraft response, to be modeled. A useful output capability of the TAILSIM program is the ability to display multiple postrun plot pages to allow a quick assessment of the time history response. There are 16 plot pages currently available to the user. Each plot page displays 9 parameters. Each parameter can also be displayed individually, on a one plotperpage format. For a more refined display of the results the program can also create files of tabulated data, which can then be used by other plotting programs. The TAILSIM program was written straightforwardly assuming the user would want to change the database tables, the buildup equations, the output parameters, and the pilot model parameters. A separate database file and input file are automatically read in by the program. The use of an include file to set up all common blocks facilitates easy changing of parameter names and array sizes.