Accession Number : AD0716778

Title :   A Design Method for Feedforward Compensation of Linear Automatic Control Systems.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SHIP ENGINEERING CENTER PHILADELPHIA PA PHILADELPHIA DIV

Personal Author(s) : Dalton,Raymond C.

Report Date : 17 DEC 1970

Pagination or Media Count : 59

Abstract : The report provides a design method for feedforward compensating a linear automatic control system. It is shown that feedforward compensation can be used to effectively differentiate the input signal and apply it at the system input. Also, the compensation can alter system closed loop characteristics so that transient response may often be tailored to requirements on response rise time and overshoot. In illustrating the method it is shown that system error is reduced to a minimum, and that the value of feedforward gain required is unique. To apply the method, a familiarity with Laplace transform techniques is required. The calculations can be tedious for higher order systems, but the resulting improvement in system response will often justify the effort. The report concludes with applications of the design method. There two existing shipboard systems, a turbine-generator set and a control system for a forced draft blower, are feedforward compensated. (Author)

Descriptors :   (*ADAPTIVE CONTROL SYSTEMS, MATHEMATICAL MODELS), LINEAR SYSTEMS, INTEGRAL TRANSFORMS, FEEDBACK, BLOWERS, TURBINES, GAS FLOW

Subject Categories : Numerical Mathematics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE