d2997c2861
Fill out the DRC mode set with ctrl_shutdown (u = -5*beta), ctrl_scram (u = -8*beta), and ctrl_heatup (feedback-linearizing P on ramped T_avg reference, saturated u, no integrator). Add ctrl_operation_lqr as a full-state-feedback counterpart to ctrl_operation — K cached, closed-loop essentially perfect under the 100%->80% Q_sg step where plain P has ~5F overshoot. Add pke_linearize for numerical (A, B, B_w) Jacobians at any operating point; test_linearize confirms ~4e-4 rel err vs nonlinear sim for a 5% Q_sg step. Extend pke_solver with an optional x0 argument so each mode can start from a plausible IC. main_mode_sweep.m exercises all five modes back-to-back and saves the 4-panel plots. CLAUDE.md updated with model-validity-range note (trust region is ~+/-50C around operating point; true cold shutdown is out of scope for the linear feedback coefficients). Hacker-Split: build out control layer end-to-end for reachability. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
22 lines
767 B
Matlab
22 lines
767 B
Matlab
function u = ctrl_shutdown(t, x, plant, ref)
|
|
% CTRL_SHUTDOWN Hot-standby / cold-shutdown passive controller.
|
|
%
|
|
% Holds the reactor deeply subcritical with rods fully in. No feedback —
|
|
% just a constant negative external reactivity that dominates any
|
|
% temperature-feedback contribution the reactor could plausibly produce
|
|
% in its accessible state set.
|
|
%
|
|
% u = -5 * beta (~5 $ subcritical)
|
|
%
|
|
% Sign check: rho_total = u + alpha_f*(T_f - T_f0) + alpha_c*(T_c - T_c0).
|
|
% At cold IC (T < T0) the feedback contribution is positive (roughly
|
|
% +2.8 $ at T = T_cold0 everywhere), so -5 $ leaves the reactor at about
|
|
% -2.2 $ — comfortably subcritical.
|
|
%
|
|
% Inputs:
|
|
% t, x, plant, ref - standard signature; all unused here.
|
|
|
|
u = -5 * plant.beta;
|
|
|
|
end
|